Skocz do pozycji: 1.

Tytuł:

Study on pre-concentration efficiency of wolframite from tungsten ore using gravity and magnetic separations

Autorzy:

Lu, D.
Wang, Y.
Jiang, T.
Sun, W.
Hu, Y.

Powiązania:

https://bibliotekanauki.pl/articles/109597.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

tungsten ore
pre-concentration
separation efficiency
gravity separation
magnetic separation

Opis:

Pre-concentration is effectively applied in recovering wolframite from tungsten ore, due to its benefits of further upgrading tungsten ore and improving separation efficiency. The most important pre-concentration techniques for tungsten ore include gravity separation and magnetic separation, based on the fact that there are appreciable differences, between the desired wolframite and the gangue minerals, in density and magnetic susceptibility. This study investigated the separation efficiency of gravity pre-concentration (Falcon Concentrator) and high-gradient magnetic pre-concentration (SLon VPHGMS) for the beneficiation of a Canada tungsten ore. It is a low-grade type of ore with high silica and arsenic content, and an average content of WO3 is about 0.45%. The optimum conditions for different operational parameters of two pre-concentration separators were studied on this low-grade material. The results presented in this paper suggested that although both pre-concentration techniques were effective for producing pre-concentrates containing high WO3, magnetic pre-concentration showed significantly better separation efficiency. Over 90% of the feed was rejected as the final tailings, meanwhile, over 85% of arsenic minerals were removed with tailings, while the WO3 loss was less than 15%.

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 2; 718-728
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

CAMERA SEPARATORIA, czyli krótka historia nauki o rozdzielaniu i uzasadnienie tytułu nowego czasopisma
CAMERA SEPARATORIA: short history of the separation science and ground for a new journal name

Autorzy:

Głód, B. K.
Kamiński, M.

Powiązania:

https://bibliotekanauki.pl/articles/92257.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach

Tematy:

nauka o rozdzielaniu
technologie rozdzielania
rozdzielanie
separation science
technology of separation
separation

Opis:

Od niedawna nauka o rozdzielaniu wyodrębniła się w odrębny dział nauki, mocno powiązany z techniką i technologią rozdzielania. W pracy przedstawiono krótką historię ich rozwoju oraz szczegółowy podział. W następnym numerze zamierzamy przedstawić wkład Polaków w ich rozwój.
Recently, the separation science has been rised (created). It is strongly associated with the technique as well as technology of separation. The paper presents a brief history of their development and a detailed division on the different sections and techniques. In the next issue we intend to present a contribution to the Polish scientists in their development.

Źródło:

Camera Separatoria; 2011, 3, 1; 17-32
2083-6392
2299-6265

Pojawia się w:

Camera Separatoria

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:

Recovery of Fe and V via selective reduction–magnetic separation of vanadium-titanium magnetite concentrate

Autorzy:

Liu, Liwei
Li, Guofeng
Zhao, Libing
Li, Jinpeng
Li, Yanfeng

Powiązania:

https://bibliotekanauki.pl/articles/2146847.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

vanadium-titanium magnetite concentrate
selective reduction
magnetic separation
Fe separation
V separation

Opis:

With the aim of separating Fe and V, a vanadium-titanium magnetite concentrate was selectively reduced, followed by magnetic separation. The processes accompanying reduction of the vanadium-titanium magnetite concentrate were investigated using thermodynamic simulation, experiments, scanning electron microscopy, and electron probe microanalysis. Appropriate reduction conditions and controlling the amount of CaCO3 promoted the reduction of Fe-containing minerals to metallic Fe. V was released from magnetite, ilmenite, and titanomagnetite, and was inhibited to reduce to metallic V, leading to V enrichment in the non-magnetic products in the form of oxides. Moreover, the Fe particles wrapped the slag phase when the amount of CaCO3 exceeded 8%, which is unfavourable for the magnetic separation of Fe and V. Magnetic products with an Fe content of 87.19%, Fe recovery of 82.62%, V content of 0.09% and non-magnetic products with a V content of 1.00% and a V recovery of 85.49% were obtained when the vanadium-titanium magnetite concentrate was reduced for 100 min at 1623 K with a C/O molar ratio of 2.5 and 8% CaCO3, followed by separating at a magnetic field strength of 85 mT.

Źródło:

Physicochemical Problems of Mineral Processing; 2022, 58, 1; 50--62
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Kinetic separation curves based on process rate considerations

Autorzy:

Drzymala, J.
Ratajczak, T.
Kowalczuk, P. B.

Powiązania:

https://bibliotekanauki.pl/articles/110027.pdf

Data publikacji:

2017

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

separation
flotation
kinetics
separation curves
process rate

Opis:

There are many graphical representations of separation results involving time as a crucial parameter determining the kinetics of a process. The graphical representations of results of separation are usually in the form of 2D plots relating two parameters which one of them is time. Time can also be utilized as a complex parameter such as a process rate. The plots involving time are called kinetic curves. Theoretically, the number of kinetic curves is infinite. The basic process kinetic curves, relating either yield (or recovery) and time can be modified to obtain numerous local and global efficiency curves. The global efficiency kinetic curves provide characteristic constants which do not change with the time and yield of a process. In this paper the local and global efficiency plots were created using experimental data which followed the so-called first order kinetics. It was shown that the integral 1st order kinetic equation provided the kinetic constant k which was numerically identical with the 1st order specific rate v, while their units were different (k, 1/min; v, %/(%·min). The global efficiency parameters plotted versus the maximum yield provided another type of plot, which can be called the limits kinetic curve. The limits kinetic curves are very useful for characterizing, quantification and classification of separation systems. The limits kinetic curves can be normalized providing one universal curve with a characteristic point, for instance, v50 indicating the specific rate (or kinetic) constant at the maximum recovery equal to 50%. The mathematical equation of the normalized limits kinetic curve was given in the paper.

Źródło:

Physicochemical Problems of Mineral Processing; 2017, 53, 2; 983-995
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

New composite polymer membranes for biogas separation

Autorzy:

Bojarska, M.
Szwast, M.
Piątkiewicz, W.

Powiązania:

https://bibliotekanauki.pl/articles/115604.pdf

Data publikacji:

2011

Wydawca:

Fundacja na Rzecz Młodych Naukowców

Tematy:

biogas
gas separation
membranes for gas separation

Opis:

Biogas can be used as an alternative energy source. Unfortunately presence of carbon dioxide in a composition of biogas makes compression and transportation difficult. In addition CO2 makes biogas lower calorific. That is why new methods for carbon dioxide separation from biogas are to be explored. Obtained results for polypropylene membranes modifications by polydimethylosiloxanes are presented in this paper.

Źródło:

Challenges of Modern Technology; 2011, 2, 1; 65-68
2082-2863
2353-4419

Pojawia się w:

Challenges of Modern Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Digital image processing (DIP) application on the evaluation of ironrich heavy mineral concentrates produced from river sand using a sequential mineral processing approach

Autorzy:

Terzi, Mert
Kursun, Ilgin
Cinar, Mustafa
Ozdemir, Orhan

Powiązania:

https://bibliotekanauki.pl/articles/1447186.pdf

Data publikacji:

2021

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

gravity separation
magnetic separation
flotation
silica
iron
magnetitte

Opis:

In this study, the iron-rich heavy mineral concentrate production from river sand as a byproduct of an alternative resource by gravity, magnetic separation, and flotation methods were investigated in detail. For the physical separation of the sample and increasing the Fe2O3 content, a shaking table and a wet high-intensity magnetic separator were used, respectively. The gravity and magnetic separation experiments included rougher, cleaner, and scavenger circuits. In the flotation experiments, cationic flotation with ethylenediamine under acidic conditions, and anionic flotation with sodium oleate under alkaline conditions were performed. The iron and silica content of the products obtained were determined by digital image processing (DIP) methods and compared with the classical analytical procedures. Finally, a flow chart was proposed for the processing of the ore according to the optimum enrichment parameters were determined from the experiments. The results obtained in this study show that it is possible to produce an iron-rich heavy mineral concentrate with Fe2O3 grade and recovery rate of 79.13% and 57.81%, respectively, in addition to a potential feed for the production of quartz sand and feldspar concentrates.

Źródło:

Physicochemical Problems of Mineral Processing; 2021, 57, 3; 21-35
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Characterization and beneficiation of iranian low-grade manganese ore

Autorzy:

Mehdilo, A.
Irannajad, M.
Hojjati-Rad, M. R.

Powiązania:

https://bibliotekanauki.pl/articles/110939.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

pyrolusite
manganese ore
ore characterization
gravity separation
magnetic separation

Opis:

The mineralogical studies indicated that the Charagah ore deposit contains approximately 17% pyrolusite, 78% calcite and 3–4% quartz. Pyrolusite as a main valuable mineral is found in the forms of coarse and fine pyrolusites. The coarse grains pyrolusite with simple texture is liberated at 180 micrometers. Another kind of pyrolusite with particle size finer than 10 m is disseminated inside gangue phases. This kind of pyrolusite has important effect in beneficiation processes and can affect the manganese grade of the concentrate and its recovery negatively. By jigging machine a pre-concentrate with 20% MnO and a final tailing with about 13% manganese loss are obtained. Using tabling technique or wet high intensity magnetic separation (WHIMS) and also their combination with jigging machine, production of a final pyrolusite concentrate with suitable grade but average recovery is possible. By jigging-tabling a concentrate with – 500+45 m size fraction, 44.3% MnO and 61.3% recovery is obtained while jigging-WHIMS produces a concentrate containing 52.6% MnO with a recovery up to 56.6% and d80 = 180 m.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 2; 725-741
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Struktura procesów separacji i sposoby analizy wyników separacji
Structure of separation processes and ways of analysis of separation results

Autorzy:

Drzymała, J.

Powiązania:

https://bibliotekanauki.pl/articles/319402.pdf

Data publikacji:

2005

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

procesy separacji
separacja
analiza wyników
separation processes
separation
result analysis

Opis:

W różnych dziedzinach mamy do czynienia z różnymi procesami separacji. Mogą one być proste lub skomplikowane, rzeczywiste lub wirtualne, czy też małe lub duże. Procesy separacji dostarczają dwóch lub więcej produktów i dotyczą jednego lub więcej składników. Separacja jest wynikiem działania sił porządkujących, rozpraszających oraz sił rozdzielających. Ponieważ procesy separacji powinny mieć podobną strukturę, istnieje potrzeba spójnego opisania jej organizacji oraz nomenklatury, którą można użyć do analizy, oceny i porównania procesów separacji i ich wyników. W tej pracy zaprezentowano i przedyskutowano sposoby analizy wyników separacji. Analiza została oparta na pogrupowaniu właściwości układów separacji na cztery rodziny takie jak nazwa, ilość oraz jakość składników, a także główna cecha wykorzystywana do separacji. Takie pogrupowanie i ich kombinacje dostarczają sześciu różnych dwuparametrowych sposobów analizy wyników separacji i ich form graficznych. Nazwano je jako: a) wzbogacanie (ilości względem jakości) , b) klasyfikacja (jakość względem wartości cechy), c) dystrybucja (ilość względem nazwy), d) rozdział (ilość względem nazwy), e) sortowanie (jakość względem nazwy), oraz f) opis. Zaprezentowana struktura układów separacji jest prosta i pozwala na lepsze rozumienie procesu separacji i jego ocenę, jak również porównanie różnych procesów separacji.
Various separation processes are encountered in different fields. They can be simple or complex, real or virtual, micro or macro. The separation processes involve two or more products and one or more components. The separation results from the action of ordering, disordering and splitting forces of separation systems. Since all separation processes have similar structure, there is a need for a self-consistent delineation of their organization and nomenclature that can be used for analysis, evaluation, and comparison of separation processes and their results. In the paper, structure and ways of analysis of separation results is presented and discussed. The analysis is based on grouping the properties of separation systems into four families that is name, quality, quantity of components, and the main property utilized for separation of the components. Such groupings and their combinations provide six different approaches that can be used for analysis of separation data and presenting them in a graphical form. They were termed as: a) upgrading (quality vs. quantity), b) classification (quality vs. feature value), c) distribution (quantity vs. feature value), d) splitting (quantity vs. name), e) sorting (quality vs. name), and f) description (feature value vs. name). The presented structure of separation systems is simple and provide a better understanding of separation process and their evaluation as well as comparison of different separation systems.

Źródło:

Inżynieria Mineralna; 2005, R. 6, nr 2, 2; 3-11
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Analysis of the pneumatic separation process of agricultural materials

Autorzy:

Panasiewicz, M.

Powiązania:

https://bibliotekanauki.pl/articles/24769.pdf

Data publikacji:

1999

Wydawca:

Polska Akademia Nauk. Instytut Agrofizyki PAN

Tematy:

aerodynamic property
air separation
crushed seed
separation process
protein
moisture content
agricultural material
lupin
pneumatic separation process
seed

Źródło:

International Agrophysics; 1999, 13, 2
0236-8722

Pojawia się w:

International Agrophysics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Tworzenie i kategoryzacja parametrów separacji
Creation and categorization of separation parameters

Autorzy:

Drzymała, J.

Powiązania:

https://bibliotekanauki.pl/articles/318602.pdf

Data publikacji:

2002

Wydawca:

Polskie Towarzystwo Przeróbki Kopalin

Tematy:

parametry separacji
tworzenie parametrów separacji
kategoryzacja parametrów separacji
separation parameters
creation of separation parameters
categorization of separation parameters

Opis:

Różne wskaźniki nazywane jako indeks, wskaźnik, czynnik, liczba, efektywność, sprawność, uzysk, stopień, czy też współczynnik są stosowane do oceny procesów separacji. Ponieważ oparte są one o takie wielkości jak wychód i zawartość, a użyte osobno nie są przydatne do oceny procesu separacji, w istocie są one parametrami separacji. W tej pracy pokazano, że istnieje nieskończona liczba parametrów separacji. Mogą być one generowane za pomocą prostych wzorów i zasad stosując wychód, który charakteryzuje ilość produktu, oraz zawartości, które opisują jakość produktu separacji i nadawy. W tej pracy parametry separacji podzielono na grupy i cztery najważniejsze z nich scharakteryzowano. Parametry separacji mogą być łączone w pary, co pozwala na utworzenie nieskończonej liczby krzywych wzbogacania i klasyfikacji. Ponieważ dowolna para parametrów separacji zawiera w sobie te same informacje o procesie, nie jest możliwe powiedzieć, który parametr, przez innych autorów nazywany także indeksem czy efektywnością, jest lepszy.Tylko ich graficzne i matematyczne postacie są różne.
Different indicators referred to as indices, factors, numbers, ratios, efficiencies, recoveries, degrees, coefficients, etc. are used for evaluation of separation processes. Since they are based on yields and contents, and when used alone are not able to evaluate separation process, in fact all of them are separation parameters. It was shown in this paper that there is unlimited number of separation parameters. They can be generated by means of simple formulas and rules using yield, which characterizes the quantity, and the contents, which describe the quality of separation products and the feed. In this paper the separation parameters were divided into families and four most important groups were characterized and discussed in the paper. The separation parameters can be combined into pairs to create unlimited number of either upgrading or classification plots. Since any pair of separation parameters carries the same information about the process, it is not possible to say which parameter (by others also called index, efficiency, etc.) is better. Only their graphical and mathematical forms are different.

Źródło:

Inżynieria Mineralna; 2002, R. 3, nr 1, 1; 11-19
1640-4920

Pojawia się w:

Inżynieria Mineralna

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:

Vybor modeli dinamiki sploshnojj sredy dlja opisanija procsessov vibroseparirovanija semennykh smesejj
The choice of model for the dynamics of a fluid for the description of processes of vibrating separate seed mixtures

Autorzy:

Lukyanenko, V.

Powiązania:

https://bibliotekanauki.pl/articles/76667.pdf

Data publikacji:

2015

Wydawca:

Komisja Motoryzacji i Energetyki Rolnictwa

Tematy:

dynamics model
fluid
vibration
separation
mixture separation
seed
optimization
fluid mechanics

Źródło:

Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 7
1730-8658

Pojawia się w:

Motrol. Motoryzacja i Energetyka Rolnictwa

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:

Actinide ion exchange technology in the back end of the nuclear fuel cycle

Autorzy:

Navratil, J.
Wei, Y.

Powiązania:

https://bibliotekanauki.pl/articles/147559.pdf

Data publikacji:

2001

Wydawca:

Instytut Chemii i Techniki Jądrowej

Tematy:

actinide separation and purification
adsorption and elution
ion-exchange resin
separation

Opis:

Ion exchange is used extensively in nuclear power technology, especially for uranium ore processing, removal of contaminants from power reactor waters and in the back end of the nuclear fuel cycle. In nuclear fuel reprocessing plants, ion exchange is used for the purification of actinide elements for further use, for the solidification of low- and medium-active waste solutions, and for the partitioning of high-level wastes. This paper reviews selected technological uses of ion exchange in these operations for recovery, separation and purification of selected actinides (Pu, U, Np, etc.). Recent research and development on ion exchange technologies for actinides are also summarized.

Źródło:

Nukleonika; 2001, 46, 2; 75-80
0029-5922
1508-5791

Pojawia się w:

Nukleonika

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Application of superconducting magnetic separation to an artificial mixture of chalcopyrite and molybdenite

Autorzy:

Li, Daokui
Kou, Jue
Sun, Chunbao
Yu, Baoqiang
Wang, Chao

Powiązania:

https://bibliotekanauki.pl/articles/110786.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

magnetic matrices
superconducting magnetic separation
buildup behavior
chalcopyrite and molybdenite separation

Opis:

Superconducting magnetic separation of chalcopyrite and molybdenite was studied, along with the effects of the magnetic flux density, slurry concentration, and pulsation amplitude on the separation. According to the force equilibrium model of magnetic particles that accumulated on magnetic matrices during the superconducting magnetic separation, the saturated buildup of magnetic particles was calculated. The saturated buildup of magnetic particles was an approximate fan ring and had a positive correlation with the background magnetic flux density. Superconducting magnetic separation tests results showed that a Mo concentrate with a Mo grade of 31.86% and recovery of 87.24% and a Cu concentrate with a Cu grade of 30.57% and recovery of 94.76% could be obtained. This verified the feasibility of separating mixed Cu and Mo minerals via superconducting magnetic separation.

Źródło:

Physicochemical Problems of Mineral Processing; 2019, 55, 3; 597-604
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Separacja stała podczas trwania węzła małżeńskiego
La seprazione perpetua manente vincolo

Autorzy:

Dzierżon, Ginter

Powiązania:

https://bibliotekanauki.pl/articles/662993.pdf

Data publikacji:

2000

Wydawca:

Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie

Tematy:

separacja stała
permanent separation

Opis:

Questo articolo presenta lo sviluppo storico di quella istituzione. Fonti di diritto canonico indicano che l’adulterio è rimasto sempre la causa principale per una ricorso all’uso della seprazione conjugale. Esso è ritenuto un comportamemto fortamente turbativo della convivenza coniugale, dall punto di vista etico, personale e sociale. La separazione perpetua è considerata come un estremo ed eccezionale rimedio per salvaguardare il bene del coniuge innocente. Poiché le norme canonice sollecitano una disponibilita del coniuge innocente a un attegiamento di cristiana caritatevole compresione e al perdono verso il coniuge colpevole.

Źródło:

Ius Matrimoniale; 2000, 11, 5; 151-168
1429-3803
2353-8120

Pojawia się w:

Ius Matrimoniale

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

The issue of intellectual intuition in metaphysics

Autorzy:

Piętka, Dariusz

Powiązania:

https://bibliotekanauki.pl/articles/1070366.pdf

Data publikacji:

2020-12-31

Wydawca:

Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie

Tematy:

intuition
meaning
understanding
separation

Opis:

The article presents problems of intellectual intuition in metaphysics from a semiotic point of view. There are various types of intuition in philosophy: rational intuition, irrational intuition, and sensual intuition. All of them are immediate ways of cognition. Classical metaphysics uses intellectual intuition as its main method to find out and justify its statements. The main problem of intellectual intuition is an intersubjective approach to the object of metaphysics. The main aim of this paper is the objectivization and rationalization of intellectual intuition in language. The semantic notion of meaning and the pragmatic notion of understanding are the fundamental tools which are used to translate the issue of intuition from the subject-ma$er level into the language level. This operation allows to look at intuition in a non-psychological manner. It enables the objectivization of the method of intellectual intuition in the light of the understanding of meanings.

Źródło:

Studia Philosophiae Christianae; 2020, 56, S1; 165-185
0585-5470

Pojawia się w:

Studia Philosophiae Christianae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Separacja małżonków : instytucja funkcjonująca w polskim prawie rodzinnym i w prawie kanonicznym
La separazione dei coniugi - l’istituzione di diritto polacco e di diritto canonico

Autorzy:

Kasprzyk, Piotr

Powiązania:

https://bibliotekanauki.pl/articles/663443.pdf

Data publikacji:

2003

Wydawca:

Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie

Tematy:

separacja małżonków
separacja w polskim prawie rodzinnym
separacja w prawie kanonicznym
separacja
separation of the spouses
separation in Polish family law
separation in canonical law
separation

Opis:

L’autore presenta l’istituzione della sparazione dei coniugi secondo il diritto polacco e il dritto canonico sottolineando il ruolo della separazione come uno strumento che serve a tutelare il vincolo matrimoniale.

Źródło:

Ius Matrimoniale; 2003, 14, 8; 87-118
1429-3803
2353-8120

Pojawia się w:

Ius Matrimoniale

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

New Pairwise Separation Axioms in Bitopological Spaces

Autorzy:

Arwini, Khadiga Ali
Almrtadi, Hanan Musbah

Powiązania:

https://bibliotekanauki.pl/articles/1030774.pdf

Data publikacji:

2020

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

bitopological spaces
separation axioms

Opis:

Several pairwise concepts for bitopological spaces (BTS) have been studied by many researchers. In this paper we introduce new pairwise separation axioms p'-Ti (I = 0, 1, 2, 3, 4) and p'-Ri (I = 0, 1) in bitopological spaces, then we study their properties and their relations with the standard separation axioms in BTS.

Źródło:

World Scientific News; 2020, 145; 31-45
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Role of ore mineralogy in selecting beneficiation route for magnesite-dolomite separation

Autorzy:

Yehia, A.
Al-Wakeel, M.

Powiązania:

https://bibliotekanauki.pl/articles/110660.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

magnetic separation
refractory materials

Opis:

Characterization and beneficiation of magnesite-dolomite sample were performed. The role of ore mineralogy in selecting the most adequate concentration method for magnesite-dolomite separation was found to be detrimental. The microscopic analysis showed that dolomite is stained with goethite and lepidocrocite (weakly magnetic minerals), while magnesite is stained with hematite and magnetite (highly magnetic mineral). A dry magnetic separation technique was used to separate dolomite from magnesite. The magnetic separation of the sample resulted in a magnesite concentrate product assaying 1.12% CaO with 46.02% recovery and CaO/SiO2 molar ratio = 1.62. This magnesite product is suitable for basic refractory. Besides, middling fraction was produced, containing 44.63% magnesite and 10.95% dolomite. This product is suitable for making low-loss forsterite dielectrics.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 2; 525-534
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Advanced sorting technologies and its potential in mineral processing
Zaawansowane technologie sortowania i ich zastosowanie w przeróbce surowców mineralnych

Autorzy:

Kolacz, J.

Powiązania:

https://bibliotekanauki.pl/articles/348599.pdf

Data publikacji:

2012

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

separacja optyczna
separacja elektroniczna
sortowanie optyczne
optical separation
electronic separation
optical sorting

Opis:

A new optical sorting system based on a complex image analysis and high definition imaging has been developed by Comex. The image analysis is based on high definition image analysis, X-ray attenuation and advanced filtration tools. Different mineral properties are used to identify the processed material. The system is further combined with a high speed rejection mechanism based on FPGA technology and operating in real time conditions. This provides a minimal error when removing waste particles from the sorted material.
Nowy system sortowania optycznego oparty na złożonej analizie obrazu i obrazach wysokiej rozdzielczości został opracowany przez Comex. Analiza obrazu oparta jest na obrazach wysokiej rozdzielczości, tłumieniu promieni rentgenowskich oraz zaawansowanych narzędzi filtracyjnych. Różne właściwości minerałów zostały zastosowane w celu identyfikacji przerabianego materiału. System zaopatrzony został w mechanizm odrzucający wysokiej prędkości oparty na technologii FPGA oraz pracujący w warunkach czasu rzeczywistego. Pozwala to zminimalizować błąd przy usuwaniu ziaren odpadowych z sortowanego materiału.

Źródło:

AGH Journal of Mining and Geoengineering; 2012, 36, 4; 39-48
1732-6702

Pojawia się w:

AGH Journal of Mining and Geoengineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Matematicheskoe opisanie povedenija zernovok podsolnechnika v vozdushnom potoke razdelitelnykh ustanovok
Mathematical description of the behavior of sunflower kernels in the air flow separation units

Autorzy:

Kolodijj, A.
Kjurchev, S.

Powiązania:

https://bibliotekanauki.pl/articles/77957.pdf

Data publikacji:

2015

Wydawca:

Komisja Motoryzacji i Energetyki Rolnictwa

Tematy:

mathematical description
sunflower
productivity
sowing material
grain separation
air flow
separation
aspiration channel

Źródło:

Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 9
1730-8658

Pojawia się w:

Motrol. Motoryzacja i Energetyka Rolnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Analiza rozdziału w separatorze magnetycznym bębnowym
Analysis of separation in the drum magnetic separator

Autorzy:

Brożek, M.

Powiązania:

https://bibliotekanauki.pl/articles/216901.pdf

Data publikacji:

2009

Wydawca:

Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN

Tematy:

separacja magnetyczna
separator bębnowy
pole magnetyczne
model rozdziału
prędkość separacji
magnetic separation
drum separator
magnetic field
separation model
separation rate constant

Opis:

Separatory magnetyczne bębnowe stanowią najbardziej rozpowszechniony typ separatorów stosowanych w procesach wzbogacania rud magnetytowych oraz regeneracji cieczy zawiesinowych w układach wzbogacania grawitacyjnego w cieczach zawiesinowych. Efekty wzbogacania są zależne od szeregu czynników, takich jak: wydajność separatora, zawartość części stałych w zawiesinie, natężenie pola magnetycznego w przestrzeni roboczej separatora, prędkość obrotowa bębna, uziarnienie nadawy oraz rozkład właściwości magnetycznych w nadawie. Ze względu na zjawisko flokulacji magnetycznej dla uzyskania produktów o określonej jakości stosuje się wielokrotne separacje czyszczące lub uzupełniające. W artykule wyznaczono charakterystykę przestrzeni roboczej separatora magnetycznego w postaci rozkładu pola magnetycznego i siły magnetycznej działającej na ziarno, określono optymalną wartość podziałki biegunów układu magnetycznego separatora. Z bilansu sił wyliczono wartość magnetycznej podziałowej przy wzbogacaniu na sucho oraz zawartość magnetytu w ziarnach podziałowych. Dla przeprowadzenia analizy rozdziału opracowano model wielokrotnego wzbogacenia w procesie ciągłym, uzyskując na jego podstawie ogólne wyrażenie na uzysk ziaren magnetycznych w produkcie magnetycznym po kilkukrotnych separacjach uzupełniających produktu niemagnetycznego oraz zależność zawartości składnika magnetycznego w produkcie niemagnetycznym od długości drogi separacji w pojedynczym stadium. Wykorzystując empiryczną zależność składnika magnetycznego w produkcie niemagnetycznym od liczby obrotów bębna, wyznaczono na podstawie modelu zależność stałej prędkości separacji składnika magnetycznego od liczby obrotów bębna.
Drum magnetic separators constitute the most common type of separators applied in the magnetic ore enrichment processes and in dense-medium recovery in the systems of gravitational enrichment in heavy medium suspensions. The separation effects depend on many factors, such as separator efficiency, content of solid parts in the suspension, magnetic field intensity in the separator working space, drum rotational speed, feed particle size and distribution of magnetic properties in the feed. Due to the phenomenon of magnetic flocculation, multiple cleaning or supplementing separations are used to obtain products of fixed quality. In the paper, by means of solving Laplace's equation in the polar system (Eqs 1 and 2), the author determined the characteristics of the working space in the magnetic separator in the form of magnetic field distribution (Eqs 9 and 13) and magnetic force acting upon the particle (Eqs 15a and 15b), determined the optimum value of pole pitch of the separator magnetic system (Eq 23). The dependence of pole pitch on particle size for two values of the drum radius was presented in Fig. 3. The value of magnetic separation susceptibility at dry enrichment was calculated from the force balance together with the content of magnetite in separation particles (Eqs 27 and 29, respectively). The model of multiple separation in the continuous process was elaborated in order to execute the separation analysis, obtaining a general expression for the recovery of magnetic particles in the magnetic products after several supplementing separations of the non-magnetic product (Eq 42) as well as the dependence of the content of magnetic component in the non-magnetic product upon the length of separation path in a single stage (Eq 50). In equation (42) and (50) denotes the separation rate constant of magnetic particles. Applying the empirical dependence of content of the magnetic component in the non-magnetic product upon the number of drum rotations the author, according to the model, determined the dependence of separation rate constant of the magnetic components upon the number of drum rotations. Figure 8 presents this dependence. The analysis of separation, presented in this article, is based upon heuristic considerations. Magnetic interactions between particles should be taken into account when calculating the dependence of the separation rate constant of the magnetic component upon the process efficiency. On the other hand, in order to determine the dependence of the separation rate constant upon the number of drum rotations, the separation process should be considered as a birth and death stochastic process in the continuous separation system.

Źródło:

Gospodarka Surowcami Mineralnymi; 2009, 25, 1; 65-83
0860-0953

Pojawia się w:

Gospodarka Surowcami Mineralnymi

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Aehrodinamicheskaja separacija semjan sel'skokhozjajjstvennykh kul'tur v malogabaritnykh ustrojjstvakh
Aerodynamic separation of seed of agricultural cultures is in small devices

Autorzy:

Volozhaninov, C.
Zavalijj, A.
Kuzovkin, O.

Powiązania:

https://bibliotekanauki.pl/articles/76966.pdf

Data publikacji:

2014

Wydawca:

Komisja Motoryzacji i Energetyki Rolnictwa

Tematy:

seed processing
aerodynamic separation
cleaning
separation
high quality
seed
agricultural culture
agricultural enterprise

Źródło:

Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 5
1730-8658

Pojawia się w:

Motrol. Motoryzacja i Energetyka Rolnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Is Separation of Powers a Useless Concept? Part II: Tripartite System Criticism and Application Problems

Autorzy:

Hapla, Martin

Powiązania:

https://bibliotekanauki.pl/articles/962410.pdf

Data publikacji:

2019

Wydawca:

Uniwersytet im. Adama Mickiewicza w Poznaniu

Tematy:

Separation of powers
state functions
tripartite separation of powers
formalism
functionalism
political theory

Opis:

In this paper, the author raised the question of whether the separation of powers is a useless concept. It summarizes some critical arguments against the tripartite separation of powers. The paper deals with application issues related to the separation of powers and distinguishes several attitudes toward them, which it then analyses in more detail. Great attention is dedicated to formalism and functionalism. Eventually, the author wonders whether it would be better to innovate the idea of separation of powers, or to dismiss and replace it with some other principle. He concludes that the separation of powers has problems, but we need to evaluate this idea in relation to its possible alternatives. In such a light it still sounds promising.

Źródło:

Adam Mickiewicz University Law Review; 2019, 9
2450-0976

Pojawia się w:

Adam Mickiewicz University Law Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Filters and sequences

Autorzy:

Solecki, Sławomir

Powiązania:

https://bibliotekanauki.pl/articles/1205111.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

filters
separation property
Fatou's lemma

Opis:

We consider two situations which relate properties of filters with properties of the limit operators with respect to these filters. In the first one, we show that the space of sequences having limits with respect to a $Π^0_3$ filter is itself $Π^0_3$ and therefore, by a result of Dobrowolski and Marciszewski, such spaces are topologically indistinguishable. This answers a question of Dobrowolski and Marciszewski. In the second one, we characterize universally measurable filters which fulfill Fatou's lemma.

Źródło:

Fundamenta Mathematicae; 2000, 163, 3; 215-228
0016-2736

Pojawia się w:

Fundamenta Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Two mathematical formulas for assessing seed separation efficiency

Autorzy:

Kaliniewicz, Z.

Powiązania:

https://bibliotekanauki.pl/articles/297999.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie

Tematy:

seeds
separation process
indicators
comparison

Opis:

Two mathematical formulas for assessing the efficiency of seed mixture separation were analyzed. Increases in the crop seed yield and the efficiency of impurity separation were accompanied by higher seed separation efficiency regardless of the adopted formula. One of the examined formulas carried more information, and it could be used to determine the improvement in the purity of the separated product relative to the raw material. The difference in the analyzed formulas’ ability to determine the efficiency of seed separation was minimized when the separation process was more efficient, i.e. when the value of partial indicators of separation efficiency was closer to 1. Both formulas could be successfully used to describe seed separation efficiency because in most practical applications, the error generated by the evaluated formulas did not exceed 1.5%.

Źródło:

Technical Sciences / University of Warmia and Mazury in Olsztyn; 2013, 16(2); 109-117
1505-4675
2083-4527

Pojawia się w:

Technical Sciences / University of Warmia and Mazury in Olsztyn

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Flotation after a direct contact of flotation reagents with carbonate particles. Part 1, Model investigations

Autorzy:

Ahmed, H. A. M.
Aljuhani, M. S.
Drzymala, J.

Powiązania:

https://bibliotekanauki.pl/articles/109753.pdf

Data publikacji:

2013

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

phosphates
flotation
microemulsion
separation Introduction

Opis:

Carbonate fluorapatite (francolite), calcite and dolomite separately, as well as their model mixtures, were subjected to flotation after conditioning the particles with microemulsion consisting of 20% of Custafloat AR27 (collector, blend of fatty acid soaps and sulfates), 55% fuel oil #5 and 25% water at 70% solids density and subsequent pulp dilution with water to 25% solids. The best separation of carbonate fluorapatite from calcite and dolomite occurred at pH 8.5 and microemulsion dose between 0.9 and 1.5 kg/Mg, 1.5 min conditioning time and 2 minutes of flotation time. The obtained flotation concentrates using 1.5 kg/Mg of collector contained 84% carbonate fluorapatite (34% P2O5) with 84% recovery. The 84/84 separation efficiency in terms of grade-recovery indices points to promising results which can be obtained for real phosphate ores.

Źródło:

Physicochemical Problems of Mineral Processing; 2013, 49, 2; 713-723
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Purification of halloysite by magnetic separation

Autorzy:

Sakiewicz, P.
Lutynski, M.
Soltys, J.
Pytlinski, A.

Powiązania:

https://bibliotekanauki.pl/articles/110768.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

halloysite
magnetic separation
HCl treatment

Opis:

Rational use of mineral resources requires advanced separation methods in order to obtain high quality products. In this study chemical treatment with magnetic separation of halloysite from Dunino (Poland) is presented. Initial crushing, hydrochloric acid absorption treatment, sedimentation (settling) and polygradient magnetic separation in weak magnetic field were applied to separate aluminosilicates from iron and titanium oxides (impurities). The process allowed to obtain a product of approximately 98% purity of the aluminosilicate fraction (halloysite + kaolinite). The tailings from magnetic separation consisted of iron oxides, while the intermediate product consisted mainly of aluminosilicate and iron chlorides resulting from the HCl treatment. The obtained products can be used as a component of polymer nanocomposites, sorbents and in ceramics industry.

Źródło:

Physicochemical Problems of Mineral Processing; 2016, 52, 2; 991-1001
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Impact of Sedimentation Supported by Coagulation Process on Effectiveness of Separation of the Solid Phase from Wastewater Stream

Autorzy:

Maciołek, P.
Szymański, K.
Schmidt, R.

Powiązania:

https://bibliotekanauki.pl/articles/123962.pdf

Data publikacji:

2018

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

wastewater treatment
coagulation
flocculation
separation

Opis:

The objective of this work was to test the impact of coagulant and flocculant at the stage of mechanical wastewater treatment on the wastewater treatment plant operation, performed in the A2O process. In this paper, the principles of correct conduct of coagulation in wastewater treatment have been discussed. It appears from the research performed that significant elimination of BOD₅ such as 20÷30%, total suspended matter up to 90%, COD up to 50% and total nitrogen at 30% level was achieved supported by the coagulation process in the pre-settling tanks. Approximately 50% of phosphorus was eliminated after the mechanical part. Additionally, a significant impact of Superfloc flocculant on the effectiveness of the solid phase separation (activated sludge) in the secondary settling tank was noted under diversified flow conditions.

Źródło:

Journal of Ecological Engineering; 2018, 19, 6; 81-87
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Povyshenie proizvoditel'nosti vibracionnojj semjaochistitel'nojj mashiny s neperforirovannymi rabochimi ploskostjami
Increase of the productivity of oscillation machine for separation of seed with the unperforated workers planes

Autorzy:

Luk'janenko, V.
Galich, I.

Powiązania:

https://bibliotekanauki.pl/articles/77438.pdf

Data publikacji:

2013

Wydawca:

Komisja Motoryzacji i Energetyki Rolnictwa

Tematy:

machine
vibration
cleaning
seed
separation

Źródło:

Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 7
1730-8658

Pojawia się w:

Motrol. Motoryzacja i Energetyka Rolnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

The effects of the staff separation on employees, a case study of AMREF Kenya

Autorzy:

Wafula, Mathias Wesamba

Powiązania:

https://bibliotekanauki.pl/articles/1182804.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

AMREF Kenya
Staff separation process

Opis:

This paper assesses the effects of the staff separation process on the employees of AMREF Kenya. The Survey Research Design was used to carry out this study with the aim of accurately reflecting the real figure in the wider population of AMREF Kenya employees and to find out the effects of AMREF Kenya’s Separation Process towards the employees. The study population consisted of men and women who are employees of AMREF Kenya Country Office. The Systematic Random Sampling technique was used to obtain a sample size of 50 employees, 42 of whom participated in the study. Approval was sort by the Principal Investigator from the management of AMREF Kenya Country Office; a brief introduction and purpose of the study was given, and a written /oral consent to take part in the study was then obtained. This was followed by data collection using questionnaires that had both quantitative and qualitative properties. The questionnaires were collected after a month from all the 42 participants and were stored, then the data analyzed. Data entry was done during analysis where the questionnaires’ serial numbers were cross checked to confirm if all questionnaires were returned. Data entry was carried out using the Microsoft Excel package. The data was then edited to correct errors and verification was done to eliminate any discrepancies in the numbers entered. The data was summarized appropriately using means and proportions, and it was analyzed using the IBM SPSS version 20.0 where the findings were presented in tables and figures for easy interpretation. The findings show that majority of the separated staff were stressed as a result of their job loss; this was followed by financial difficulties, depression, poor health and family problems. The paper further shows that the employees of AMREF Kenya experienced high levels of uncertainty after layoffs; their trust towards management reduced; they were angered by layoffs and their loyalty towards the organization slightly reduced. Employee productivity and participation, and their confidence towards the management of AMREF Kenya worsened. It was concluded that the effects of the staff separation at AMREF Kenya negatively impacted on both the separated and retained staff. The findings show that separated employees face a plethora of challenges as a result of the layoff which affects their morale and way of life. The layoffs are also detrimental to the retained staff as they negatively affect their productivity, loyalty and confidence towards AMREF Kenya’s management thus causing them to seek for employment opportunities with job security in mind. The study recommended that AMREF’s management should carry out employee engagement surveys on a regular basis to find out the various implications that both the separated and retained staff experience as a result of the layoffs and ways to mitigate them.

Źródło:

World Scientific News; 2017, 65; 1-19
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

On Personal Security Issues of Soldiers from Polish Military Contingent in Iraq

Autorzy:

Żukowska, Irena

Powiązania:

https://bibliotekanauki.pl/articles/1861594.pdf

Data publikacji:

2016

Wydawca:

Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie

Tematy:

military family
mission
separation
Iraq

Opis:

Going on a mission undoubtedly constitutes a real threat to the stability of a military family. The fact of being temporarily separated, together with all the related emotional problems, seem to cause a number of dysfunctions in the partners’ relations. The departure of the spouse for a mission is an important social phenomenon which creates a new situation in which the widely acknowledged patterns of family behavior do not guarantee the fulfillment of the family’s needs. Hence, there is a necessity to renegotiate family roles and their scope. In the families of soldiers who go on a mission it is the wife who takes over all the duties and the responsibility for the family’s general wellbeing. They have to face the dull reality: paying the bills, making renovations and bringing up children. When back home, the soldiers take over the man’s responsibilities. From one moment to the next, they have to became fathers, husbands and the heads of their families again. Unfortunately, it is difficult for both spouses to cope with such a situation.

Źródło:

Security Dimensions; 2016, 17(17); 42-54
2353-7000

Pojawia się w:

Security Dimensions

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Influence of selected work parameters of the rolling screen operation on screening effects

Autorzy:

Gawenda, T.
Saramak, D.

Powiązania:

https://bibliotekanauki.pl/articles/110507.pdf

Data publikacji:

2014

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

screen
screening
effectiveness
separation sharpness

Opis:

The paper deals with effectiveness of particle size separation. The investigations of limestone screening were run on a laboratory scale using a rolling screen. Batch tests were run for various batch outputs as well as different angles of deviation of motovibrators. Quantitative and qualitative effectiveness indices were calculated as well as the imperfection and probable error, which depend on the sieve mesh. A model of determining the screening effectiveness as a function of four independent variables: the amplitude of vertical vibrations of sieve decks (described by means of the angle of deviation of motovibrators), screening time, batch output and the mesh sizes of respective sieves was proposed. The results presented in the paper and the applied approach to stochastic modeling can be used under industrial conditions for rolling screens with variable dynamic parameters at different screening parameters.

Źródło:

Physicochemical Problems of Mineral Processing; 2014, 50, 1; 337-347
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Effect of depressants in the selective flotation of smithsonite and calcite using potassium lauryl phosphate as collector

Autorzy:

Sun, Qing
Feng, Qiming
Shi, Qing

Powiązania:

https://bibliotekanauki.pl/articles/110635.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

smithsonite
calcite
flotation
depressant
separation

Opis:

In order to selectively separate smithsonite and calcite using potassium lauryl phosphate as collector and reveal the depression mechanism, the approaches of micro-flotation and zeta potential measurements were adopted. The effects of sodium hexametaphosphate (SHMP), water glass (WG), carboxymethyl cellulose (CMC) and lignosulfonate calcium (LSC) as depressants on smithsonite and calcite have been studied through micro-flotation. The single mineral flotation tests show that LSC can depress calcite, but it has little effect on smithsonite flotation. Flotation separation of a mixture of smithsonite and calcite can be completed to obtain a zinc concentrate grade up to 33.85% Zn with a recovery of 70.06%. The zeta potential results illustrate that LSC has higher tendency to be adsorbed on the surface of calcite. However, there is little adsorption of LSC on smithsonite.

Źródło:

Physicochemical Problems of Mineral Processing; 2019, 55, 1; 89-96
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Utilization of aqueous-tar condensates formed during gasification

Autorzy:

Kwiecińska, A.
Iluk, T.
Kochel, M.

Powiązania:

https://bibliotekanauki.pl/articles/125021.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

gasification
wastewater
treatment
membrane separation

Opis:

Gasification of solid fuels is an alternative process for energy production using conventional and renewable fuels. Apart from desired compounds, i.e. carbon oxide, hydrogen and methane, the produced gas contains complex organic (tars) and inorganic (carbonizate, ammonia) contaminants. Those substances, together with water vapor, condensate during cooling of the process gas, what results in the formation of aqueous-tar condensate, which requires proper methods of utilization. The management of this stream is crucial for commercialization and application of the gasification technology. In the paper the treatment of aqueous-tar condensates formed during biomass gasification process is discussed. The removal of tars from the stream was based on their spontaneous separation. The aqueous stream was subjected to ultrafiltration operated at different pressures. Such a treatment configuration enabled to obtain highly concentrated retentate, which could be recycled to the gasifier, and filtrate, which could be subjected to further treatment.

Źródło:

Journal of Ecological Engineering; 2016, 17, 5; 132-137
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Effect of depressants in the selective flotation of smithsonite and calcite using cationic collector

Autorzy:

Liu, Hongjiang
Zhang, Guofan
Luo, Yuanjia

Powiązania:

https://bibliotekanauki.pl/articles/1449481.pdf

Data publikacji:

2020

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

smithsonite
calcite
selective separation
depressant

Opis:

This work studied the effects of sodium hexametaphosphate (SHMP), tanning extract, water glass (WG) and calcium lignosulfonate (CLS) as depressants for the separation of smithsonite from calcite by using a cationic collector called octadecylamine acetate (ODA). Micro-flotation experimental tests showed that CLS can greatly and selectively depress calcite. When the dosages of CLS used were 20 and 40 mg/L, a concentrate with Zn grades of 42.54% and 49.32% and Zn recoveries of 81.66% and 68.00% was achieved in the flotation separation of mixed mineral (1:1 smithsonite:calcite). Zeta potential and adsorption measurements revealed that the adsorption of CLS on calcite’s surface was greater than that on smithsonite’s surface. When CLS was added, the adsorption of ODA was hindered greatly on the calcite’s surface but slightly on the smithsonite’s surface.

Źródło:

Physicochemical Problems of Mineral Processing; 2020, 56, 1; 1-10
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Concentration Characteristics of a Complex Antimony Ore

Autorzy:

Gülcan, Ergin
Can, İlkay B.
Can, N. Metin
Ergün, Levent Ş.

Powiązania:

https://bibliotekanauki.pl/articles/109673.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

stibnite beneficiation
heavy medium separation
shaking table
electrostatic separation
ore sorting
modelling and simulation

Opis:

Selection of a proper concentration method for a sustainable production of antimony metal from an ore deposit has its unique challenges and crucial of importance due to the growing use of antimony compounds and increasing strategic importance. Therefore, detailed laboratory scale beneficiation studies of a complex stibnite ore and modeling & simulation studies based on the experimental results were investigated within this study. Quantitative mineralogical characterization, chemical analyses, sieve tests and the heavy liquid tests were performed in the scope of ore characterization. Froth flotation, gravity concentration, electrostatic separation and ore sorting were conducted to introduce the best possible flowsheet for the individual industrial sample. It was concluded that heavy medium separation would be the only method can be used for subjected stibnite ore. Therefore, four conjectural beneficiation scenarios were tested by simulation studies for the cases proposedly allowing to produce concentrates having 10, 12, 14 and 16% Sb content. Within the simulation studies substantiating the real-life processing operation in terms of realistic performance figures, flowsheet design covered the processing of -10+0.5 mm fraction and relatively fine sizes separately via heavy medium cyclone and shaking tables, respectively. Following the itemized mass and water balances, the simulation results showed that when the grade of the concentrates were requested in between 10-16%, the total recovery of the concentrates changed between 46-49% in case of feeding 1.18% Sb with 20 tones per hour feed rate.

Źródło:

Physicochemical Problems of Mineral Processing; 2019, 55, 4; 823-839
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

A new approach in separation process evaluation. Efficiency ratio and upgrading curves

Autorzy:

Irannajad, M.
Nuri, O. S.
Allahkarami, E.

Powiązania:

https://bibliotekanauki.pl/articles/110189.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

separation efficiency
mineral processing
selectivity index
process evaluation
efficiency ratio
operation efficiency
Separation Process

Opis:

In mineral processing separation efficiency (SE), operation efficiency (OE), selectivity index (SI) and other indices have been used to evaluate the separation process. Up to now, no study has been conducted on the relationship between the SE, OE and SI indices. In this research, two upgrading curves are proposed based on the above indices for process and selectivity evaluation. The first upgrading curve is based on recovery R, SE, and OE as a function of concentrate grade. This curve has three background lines, including no upgrading line, ideal upgrading line and the ideal mixing line. The proposed upgrading curve is applicable not only for process evaluation by specification of OE and SE, but also for selectivity evaluation with the lowest difference between SE and OE. The curve showed that the recovery value is always greater than the SE and OE values. The parameters of OE, SE and R were used for plotting the upgrading curve as a function of concentrate grade taking into consideration all of them at a time. A new selectivity indicator, namely Efficiency Ratio (ER) as the selectivity parameter, is proposed as the ratio of OE to SE. The ER values fluctuate between 1 and . It can be presented as a function of concentrate and tailing grades (ER = [c(1-t)]/[1(c-t)]). The results showed that ER is insensitive to the feed grade and has the inverse relationship with SI. To measure the separation selectivity, another upgrading curve is proposed based on ER and SI parameters. This curve is divided into seven separation classes for evaluation the class of a separation process from ideal class to no separation one. The results of this research can be useful for separation process evaluation.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 3; 847-857
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Teoreticheskoe obosnovanie kachestvennykh pokazatelejj processa pnevmoseparacii dlja mnogourovnevogo vvedenija zerna
The theoretical justification of air separation process quality factors for the multilevel grain introduction

Autorzy:

Nesterenko, A.
Leschenko, S.
Petrenko, D.
Bogatyrev, D.
Kislun, O.

Powiązania:

https://bibliotekanauki.pl/articles/77122.pdf

Data publikacji:

2013

Wydawca:

Komisja Motoryzacji i Energetyki Rolnictwa

Tematy:

air separation
feeder operator
grain mixture
grain introduction
air flow resistance
separation process
theoretical analysis

Opis:

The article is devoted to the theoretical analysis of the work of the aspirating channel with the feeder for the multilevel grain mixture introduction for the purpose of efficiency improving and air flow drag reduction. There are the formulas suggested for the definition of separation process quality factors and their connection with the main separator characteristics.

Źródło:

Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 2
1730-8658

Pojawia się w:

Motrol. Motoryzacja i Energetyka Rolnictwa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Czy w dyskusji o separacji funkcjonalnej telekomunikacja może skorzystać z doświadczeń kolei?
Can Telecommunications Use the Experiences of Railways When Discussing Functional Separation?

Autorzy:

Król, Marcin

Powiązania:

https://bibliotekanauki.pl/articles/508108.pdf

Data publikacji:

2015-10-31

Wydawca:

Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania

Tematy:

K23
separacja funkcjonalna
separacja strukturalna
telekomunikacja
transport kolejowy
functional separation
structural separation
telecommunications
railways

Opis:

W artykule podjęto próbę wskazania tych doświadczeń transportu kolejowego z separacją struk-turalną, które mogą być cenne dla telekomunikacji. W pierwszej części nakreślono kontekst rozważań. Drugą część poświęcono możliwości transferu doświadczeń związanych z separacją strukturalną między branżami infrastrukturalnymi. W trzeciej części sformułowano kluczowe dla telekomunikacji wnioski wynikające z doświadczenia kolei w tym zakresie.
The article aims to show these areas of experiences with structural separation in Railways which might prove useful for Telecommunications. The context of the analysis is presented in the first part of the paper. Part II discusses the possibility to transfer experiences with structural separation among infrastructure industries. Key conclusions for the Telecommunications sector regarding structural separation applied in Railways are identifi ed in the third part of the paper.

Źródło:

internetowy Kwartalnik Antymonopolowy i Regulacyjny; 2015, 4, 6; 18-27
2299-5749

Pojawia się w:

internetowy Kwartalnik Antymonopolowy i Regulacyjny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Technology of oxygen production in the membrane-cryogenic air separation system for a 600 MW oxy-type pulverized bed boiler

Autorzy:

Berdowska, S.
Skorek-Osikowska, A.

Powiązania:

https://bibliotekanauki.pl/articles/240451.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

kriogeniczny rozdział powietrza
membranowy separator
produkcja tlenu
cryogenic air separation
membrane air separation
oxygen production

Opis:

In this paper the results of the thermodynamic analysis of the oxy-combustion type pulverized bed boiler integrated with a hybrid, membrane-cryogenic oxygen separation installation are presented. For the calculations a 600 MW boiler with live steam parameters at 31.1 MPa /654.9[degrees]C and reheated steam at 6.15 MPa/672.4[degrees]C was chosen. In this paper the hybrid membrane-cryogenic technology as oxygen production unit for pulverized bed boiler was proposed. Such an installation consists of a membrane module and two cryogenic distillation columns. Models of these installations were built in the Aspen software. The energy intensity of the oxygen production process in the hybrid system was compared with the cryogenic technology. The analysis of the influence of membrane surface area on the energy intensity of the process of air separation as well as the influence of oxygen concentration at the inlet to the cryogenic installation on the energy intensity of a hybrid unit was performed.

Źródło:

Archives of Thermodynamics; 2012, 33, 3; 65-76
1231-0956
2083-6023

Pojawia się w:

Archives of Thermodynamics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Effective flotation separation of scheelite and calcite by applying methylene phosphonic acid sodium as a novel and green depressant

Autorzy:

Zhou, Hepeng
Wu, Handan
Guo, Jiangfeng
Tang, Xuekun
Huang, Wen
Luo, Xianping

Powiązania:

https://bibliotekanauki.pl/articles/24086193.pdf

Data publikacji:

2023

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

scheelite
calcite
inhibition mechanism
flotation separation

Opis:

It is known that the flotation separation of scheelite and calcite is quite difficult due to their similar surface properites. To slove the problem, ethylenediaminetetra (methylene phosphonic acid) sodium (EDTMPS), an environmentally friendly reagent, was employed as an efficient depressant for flotation separation of calcite for the first time. In flotation experiments, it demonstrates that EDTMPS could strongly inhibit the flotation of calcite but barely affect the flotaiton behavior of scheelite, showing excellent dpress ability and selectivity. Based on a series of measurements including contact angle analysis, zeta potential, and XPS analysis, it was found that large amout of EDTMPS could be absorbed on the surface of calcite through strong chemical chelation reaction and thus inhibiting the further adsorption of NaOL. On the contrary, little EDTMPS was absorbed on that of scheelite owing to the negatively charged tungstate ions on the surface in relative terms. All in all, these results exhibit EDTMPS has excellent selective inhibition ability on calcite, which can be potentially applied in actual scheelite and calcite flotation separation process.

Źródło:

Physicochemical Problems of Mineral Processing; 2023, 59, 3; art. no. 168517
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Removal of iron from sandstone by magnetic separation and leaching: case of El-Aouana deposit (Algeria)

Autorzy:

Bouabdallah, S.
Bounouala, M.
Chaib, A. S.

Powiązania:

https://bibliotekanauki.pl/articles/89037.pdf

Data publikacji:

2015

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

leaching
magnetic separation
sandstone
mineral processing

Opis:

To improve the quality of raw materials from North East Algeria and their application in the field of flat glass manufacturing, the sandstone of El-Aouana (Jijel) was subjected to a physicochemical characterization. Analysis techniques such as X-ray diffraction, atomic absorption spectrophotometry and a chemical analysis of size fractions by sieving were used. According to this characterization it is noticed that sandstone feedstock contains primarily quartz (SiO2), as well as ferriferous minerals considered as impurities during glass manufacturing. This work concerns the removal of iron oxide from silica sandstone to obtain a material acceptable for flat glass manufacturing. For this, we have studied the silica enrichment process using a magnetic separation. Moreover, a leaching process by using hydrochloric acid has been studied under various experimental conditions; the parameters studied were: hydrochloric concentration, temperature, and time of contact. The results obtained show that the leaching studied presents a better removal of iron oxide after 150 min of treatment at temperature 90°C with a 3 mol/L, a concentrate obtained final of 99.16% SiO2 with a content of 0.01% Fe2O3.

Źródło:

Mining Science; 2015, 22; 33-44
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Effective methods of chalcedonite processing

Autorzy:

Naziemiec, Zdzisław
Saramak, Daniel

Powiązania:

https://bibliotekanauki.pl/articles/2016525.pdf

Data publikacji:

2021

Wydawca:

Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa

Tematy:

chalcedonite
density separation
raw materials processing

Opis:

Chalcedonite is an unique mineral with high variability in its density, which may cause problems in its industrial utilization. This study was aimed to find more effective methods for chalcedonite processing based on density separation. The method presented in the paper has been patented, and the results from this study showed that separation product were of a higher quality. Products of density separation have also lower variations in their density values what may results in their more effective industrial utilization.

Źródło:

Mining Science; 2021, 28; 7-18
2300-9586
2353-5423

Pojawia się w:

Mining Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Separation Axioms Weaker Than T1

Autorzy:

Arwini, Khadiga Ali
Almrgni, Mabrouka Mohammed

Powiązania:

https://bibliotekanauki.pl/articles/1030516.pdf

Data publikacji:

2020

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Subspaces
lower separation axioms
product spaces

Opis:

The purpose of this paper is to introduce a new type of separation axioms via dense sets, called DT_i-spaces (i = 0‚1/( 4) ‚1/( 3) ‚1/( 2)‚3/( 4)‚1), where a DT_i-space is a topological space which contains a dense T_i-subspace (i = 0‚1/( 4) ‚1/( 3) ‚ 1/( 2) ‚3/( 4)‚1). These new axioms are weaker than the axiom of T_□1. We provide the basic properties of DT_i- spaces (i = 0‚1/( 4)‚1/( 3) ‚1/( 2) ‚3/( 4)‚1), and we show that the axioms of DT_□((1 )/4), DT_□(1/3),〖 DT〗_□(1/2), DT_□(3/4), DT_□1 are open hereditary. Moreover, we study the connections between these axioms and the axioms of T_i where (i = 0‚1/( 4) ‚1/( 3) ‚1/( 2) ‚3/( 4)‚1).

Źródło:

World Scientific News; 2020, 144; 158-168
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Analysis of variations in and correlations between selected physical parameters of common beech (Fagus silvatica L.) nuts

Autorzy:

Kaliniewicz, Z.
Markowski, P.
Anders, A.
Tylek, P.
Krzysiak, Z.
Wasielewski, W.

Powiązania:

https://bibliotekanauki.pl/articles/298426.pdf

Data publikacji:

2018

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie

Tematy:

geometric parameters
mass
aspect ratio
separation

Opis:

The basic dimensions and the mass of common beech nuts and seeds from five nut batches, harvested from tree stands in northern Poland, were determined. Environmental conditions had a greater influence on seed plumpness than the age of tree stands. The results of measurements were analyzed statistically by analysis of variance, correlation analysis and linear regression analysis. Despite differences in their plumpness, nuts were characterized by nearly identical cross-sections which resembled an equilateral triangle. The thickness of nuts and seeds was highly correlated with their mass, and this information can facilitate seed husking and separation into mass categories. Before and after husking, seeds should be separated with the use of a mesh screen with longitudinal openings. Medium-sized (most numerous) seeds were separated into the following plumpness categories using a screen separator with ≠6 mm and ≠7 mm openings: 84% of moderately plump seeds, 3% of seeds with reduced plumpness, and 13% of plump seeds.

Źródło:

Technical Sciences / University of Warmia and Mazury in Olsztyn; 2018, 21(1); 49-63
1505-4675
2083-4527

Pojawia się w:

Technical Sciences / University of Warmia and Mazury in Olsztyn

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Possibilities of recovery and separation of rare earth elements

Autorzy:

Fila, Dominika

Powiązania:

https://bibliotekanauki.pl/articles/2079965.pdf

Data publikacji:

2018

Wydawca:

Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej

Tematy:

rare earth elements
resources
recovery
separation

Opis:

Rare earth metals are a group of elements widely used in high technology products. They are included in the group of critical mineral resources for the EU economy. Rare earth elements are found in computers and mobile phones, as well as in low-emission energy technologies. They are also applied in chemical processes as catalysts in the oil refining. Some of them occur even in considerable quantities in the earth's crust but not very often in the concentrations justifying the profitability of their extraction. Additionally, the constantly growing demand and the current market situation cause that alternative resources of rare earth elements recovery are sought after. Therefore, the recovery and separation methods as well as recovery from the secondary sources are becoming more and more important. The following paper presents the possibilities of recovery and separation of rare earth elements from primary and secondary sources.

Źródło:

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2018, 73, 1; 99-110
2083-358X

Pojawia się w:

Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Consolidation of a porous multilayered subsoil undergoing large deformation
Konsolidacja wielowarstwowego podłoża porowatego w warunkach dużych deformacji

Autorzy:

Szefer, G.
Mikołajek, M.

Powiązania:

https://bibliotekanauki.pl/articles/281348.pdf

Data publikacji:

1998

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

consolidation
porous skeleton
separation
large deformation

Opis:

In the paper the process of deformation of an elastic porous skeleton at finite strains and the associated transport of fluid through the pores is considered. Undergoing large deformations these coupled interaction phenomena require skilful analysis. Numerical results for a three-layered subsoil resting on a rigid foundation under different permeability conditions in the uni-axial state of strains are given.
W pracy rozważono proces deformacji porowatego szkieletu sprężystego przy skończonych odkształceniach oraz towarzyszącego transportu cieczy. W warunkach dużych deformacji te sprzężone zjawiska interakcji wymagają subtelnej analizy. Podano numeryczne rezultaty dla trójwarstwowego podłoża leżącego na sztywnym podkładzie przy różnych warunkach przepuszczalności w jednoosiowym stanie odkształcenia.

Źródło:

Journal of Theoretical and Applied Mechanics; 1998, 3; 759-773
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Geopolitical position of Poland - from time of partitions to the independence

Autorzy:

Brudnicka, Jowita

Powiązania:

https://bibliotekanauki.pl/articles/526976.pdf

Data publikacji:

2016

Wydawca:

Collegium Civitas

Tematy:

Geopolitics
Polska
Middle Europe
unification/separation

Opis:

To understand contemporary geopolitics, especially Polish geopolitics you have to refer to the history. Polish geopolitical philosophy has flourished in a crucial period in the history of the country - the To understand contemporary geopolitics, especially Polish geopolitics you have to refer to the history. Polish geopolitical philosophy has flourished in a crucial period in the history of the country - the time of the fall of the First Republic and partitions. Sketch of Polish geopolitics is well composed into the broader plan of European thought. This is not just a simpple analitycal exercise. Article contains the suggestion, that the events, experiences and geopolitical configurations may exhibit amazing repeatability.

Źródło:

Securitologia; 2016, 1 (23); 87-102
1898-4509

Pojawia się w:

Securitologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

PARENT–CHILD SEPARATION IN ANGOLAN TRANSNATIONAL FAMILIES

Autorzy:

Marinho, Luena

Powiązania:

https://bibliotekanauki.pl/articles/579709.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

PARENT- CHILD SEPARATION
TRANSNATIONAL FAMILIES
MIGRATION

Opis:

Globalization increased the number of transnational families all over the world. The way of life created by transnationalism leads to changes in family relationships, creates a specific dynamics, implies care at distance and produces various forms of parenting. Starting from the analysis of transnational families between Angola and Portugal, the aim of this paper is to understand the effects of migration on parent-child relationship trying to perceive how parenting at a distance is conceived by the actors: migrant parents in Portugal and children in Angola. Drawing on interviews made with migrant parents and children, the paper explores the functioning of the parental relationship at distance.

Źródło:

Studia Migracyjne - Przegląd Polonijny; 2014, 40, 3(153); 187-202
2081-4488
2544-4972

Pojawia się w:

Studia Migracyjne - Przegląd Polonijny

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

« Les marques » de l’absence dans le théâtre de Maurice Maeterlinck
« The Markers » of Absence in Maurice Maeterlinck’s Theater

Autorzy:

Enache, Eugenia

Powiązania:

https://bibliotekanauki.pl/articles/483550.pdf

Data publikacji:

2012

Wydawca:

Katolicki Uniwersytet Lubelski Jana Pawła II. Wydawnictwo Werset

Tematy:

absence
Maurice Maeterlinck
alienation
separation
death

Opis:

Our approach is focused on the issue of the “markers” of absence as well as on the expression and materialization of that absence in a corpus of works formed of the following plays: L’Intruse, Les Aveugles, Intérieur by Maurice Maeterlinck. The acceptions the concept of “absence” may receive throughout our analysis are parts of the phenomenon of progressive alienation seen, for instance, as separation (stressing the idea of distance and departure), or as solitude, then omission (in the sense of forgetting), and culminating with the inability of perception that anticipates isolation, physical imprisonment and announces death (designated through a privative prefix) as an absence that is always present and obscurity. We attempt to reveal the “markers” of absence on the level of certain constituents of the play: the character, formed of a discursive feature, infinitely simple and repetitive, much more diminished and developing without individuality, like a silent, mysterious ghost; and the action where it is rather inaction that represents our primary direction of research. As a secondary direction, we consider the markers of absence in a language that, in the case of Maeterlinck, is remarkably pure and lacks any syntactic or lexical complication, from lexical structures (the reassessment of short expressions makes the utterances seem captivatingly strange, revealing, beyond words, unutterable, unspeakable) and the grammar, especially the semantics of its forms – the 3rd person pronouns, a form we may consider as deprived of referential content, the indefinite pronouns which indicate absence –, the semantics of punctuation, especially that of the suspension points.

Źródło:

Quêtes littéraires; 2012, 2; 46-53
2084-8099
2657-487X

Pojawia się w:

Quêtes littéraires

Dostawca treści:

Biblioteka Nauki

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