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Tytuł:
Gas Evolution Rates of Graphite Protective Coatings in Dependence on the Applied Solvent and Kind of Atmosphere
Autorzy:
Kmita, A.
Drożyński, D.
Mocek, J.
Roczniak, A.
Zych, J.
Holtzer, M.
Powiązania:
https://bibliotekanauki.pl/articles/353353.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
emission of gases
protective coatings
environmental
Opis:
The results concerning emission of gases from two commercial graphite protective coatings for moulds and cores (water and alcoholic) are given in the hereby paper. Investigations were performed in two systems. One of the systems was corresponding to conditions occurring inside the mould cavity immediately after its pouring with liquid metal (Method 1), while the second was simulating conditions deep inside the mould at a certain distance from the casting (Method 2). Investigations were carried out in the CO2 atmosphere and in the air. The water protective coating generated 1.5 to 3 times larger volume of gases than the alcoholic coating (in dependence on the measuring method and atmosphere). The smallest differences occurred in the air atmosphere, while the largest in the CO2 atmosphere.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 4; 2129-2134
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Air pollution in landfill of wastes other than hazardous or inert
Zanieczyszczenia powietrza na składowiskach odpadów innych niż niebezpieczne i obojętne
Autorzy:
Miaśkiewicz-Pęska, E.
Szyłak-Szydłowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/205378.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
landfill
air pollution
microorganisms
gases
składowisko odpadów
zanieczyszczenie powietrza
mikroorganizmy
gazy
Opis:
Microbiological and chemical analysis of air was carried out on the area of landfill of wastes other than inert or hazardous. The landfill covers 20 ha and 40 000 Mg of wastes is deposited annually. Municipal waste is not segregated at the landfill. The research was conducted in April, May and November 2012. Number of the psychrophilic and mesophilic bacteria and fungi was estimated by a culture-based method. Quantitative determination of sulfur compounds and meteorological and olfactrometric examinations were also carried out. Chemical analysis was conducted with a Photovac Voyager portable gas chromatograph. Air samples were collected at 5 points. The largest group of microbes were psychrophilic bacteria, especially in summer. The highest concentration of hydrogen sulfide and other odorants was found at leachate tank and landfill body. According to the Polish Standard for the assessment of atmospheric air pollution the air in the area of the landfill is classified as not contaminated and sporadically moderately contaminated. In spring and summer the number of microscopic fungi was increased also in control samples.
Przeprowadzono badania nad zanieczyszczeniem powietrza na terenie składowiska odpadów innych niż obojętne i niebezpieczne. Wybrany obiekt został otwarty w 1997; zajmuje 20 ha i rocznie przyjmuje 40 000 Mg odpadów komunalnych, które nie podlegają segregowaniu na składowisku. Zakres badań mikrobiologicznych obejmował analizę ilościową bakterii mezofilnych, psychrofilnych oraz grzybów mikroskopowych. Do poboru próbek powietrza zastosowano metodę zderzeniową. Analizy chemiczne polegały na oszacowaniu stężenia siarkowodoru oraz merkaptanu etylowego i metylowego za pomocą przenośnego chromatografu Photovac Voager. Określano ponadto takie parametry jak prędkość i kierunek wiatru oraz intensywność zapachu. Pobór próbek przeprowadzono w pięciu punktach. Wykazano emisję mikroorganizmów oraz siarkowodoru i odorów z terenu składowiska. Najliczniejszebyły bakterie psychrofilne, zwłaszcza w porze letniej. Wysoką liczbę bakterii mezofilnych i grzybów mikroskopowych stwierdzono na bryle czynnego składowiska. Najwyższe stężenie siarkowodoru i odorów wykryto w sąsiedztwie zbiornika na odcieki oraz na składowisku. Na podstawie polskiej normy dotyczącej jakości powietrza atmosferycznego należy określić powietrze na terenie składowiska jako nie zanieczyszczone (liczba grzybów) oraz średnio zanieczyszczone i nie zanieczyszczone (liczba bakterii psychrofilnych). Wiosną i latem zaobserwowano podwyższoną liczbę grzybów mikroskopowych również w próbkach kontrolnych.
Źródło:
Archives of Environmental Protection; 2015, 41, 2; 41-46
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The evolution of the sustainable development concept in Poland, as exemplified by climate policy
Autorzy:
Karaczun, Zbigniew M.
Powiązania:
https://bibliotekanauki.pl/articles/2079175.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
climate policy
sustainable development
greenhouse gases
emission reductions
Nauki o Ziemi
Opis:
It is contended that, in essence, climate policy is sustainable development policy, given that it postulates the use of renewable resources, and an increase in the effectiveness of use of non-renewable ones. Furthermore, it serves the security of future generations more than present ones; for while unfavourable impacts of climate change are already making their presence felt, truly negative consequences of considerable signifi cance are likely to be more of a matter for the second half of the present century. This is why, in analysing the evolution of the approach to climate policy through the late 20th century and into the 21st, it is also possible to appraise changes in the approach to the sustainable-development concept. This article has therefore sought to offer the author’s analysis of how the approach to sustainable development has evolved, by reference to Poland’s climate policy from 1988 through to 2016. As this is done, an attempt is also made to identify the conditioning that has decided upon and will go on determining the shape of national policy in this domain. Climate policy in Poland has been developing since the early 1990s. At the outset, it was not a source of controversy, with the consequence that the country rather rapidly signed up to and then ratifi ed the Kyoto Protocol to the UN Framework Convention on Climate Change. However, as early as in the late 1990s, reservations began to be expressed, to the effect that actions to protect the climate might pose a threat to Poland’s economy. A key turning point as regards the approach came with the growing dispute over the EU 2020 Climate and Energy Package. It was also at this time that a thesis began to take shape, holding that the goals of climate policy where at best unfavourable and at worst dangerous for Poland. This approach in fact held sway in successive years, leaving this country’s cooperation with the EU over this matter severely hindered. The main reason for this change of approach to climate policy can be considered to lie in the politicisation thereof, and hence the increasing dominance of the short-term interests of the Polish political elite over either the public interest or the security of future generations. began to take shape, holding that the goals of climate policy where at best unfavourable and at worst dangerous for Poland. This approach in fact held sway in successive years, leaving this country’s cooperation with the EU over this matter severely hindered. The main reason for this change of approach to climate policy can be considered to lie in the politicisation thereof, and hence the increasing dominance of the short-term interests of the Polish political elite over either the public interest or the security of future generations.
Źródło:
Papers on Global Change; 2018, 25; 11-21
2300-8121
1730-802X
Pojawia się w:
Papers on Global Change
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An innovative method for waste heat recovery from flue gas treatment system through an additional economizer
Autorzy:
Iliev, Iliya Krastev
Kowalczyk, Tomasz
Beloev, Hristo Kvanov
Terziev, Angel Kostadinov
Jesionek, Krzysztof Jan
Badur, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/2091368.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
waste heat recovery
flue gases
feasibility study
battery emulsifier second generation
bag filters
Opis:
The usage of wet methods for flue gas dedusting from coalfired boilers is associated with significant heat losses and water resources. Widespread emulsifiers of the first and second generation are satisfactory in terms of flue gas cleaning efficiency (up to 99.5%), but at the same time do not create conditions for deeper waste heat recovery, leading to lowering the temperature of gases. Therefore, in the paper, an innovative modernization, including installing an additional economizer in front of the scrubber (emulsifier) is proposed, as part of the flue gas passes through a parallel bag filter. At the outlet of the emulsifier and the bag filter, the gases are mixed in a suitable ratio, whereby the gas mixture entering the stack does not create conditions for condensation processes in the stack.
Źródło:
Archives of Thermodynamics; 2022, 43, 2; 37--59
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Steam condensation analysis in a power plant condenser
Autorzy:
Drożyński, Z.
Powiązania:
https://bibliotekanauki.pl/articles/240848.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
condensation
heat transfer
inert gases
power plant condenser
kondensacja
transport ciepła
gazy obojętne
skraplacz energetyczny
Opis:
Proposed is the analysis of steam condensation in the presence of inert gases in a power plant condenser. The presence of inert, noncondensable gases in a condenser is highly undesirable due to its negative effect on the efficiency of the entire cycle. In general, thermodynamics has not provided an explicit criterion for assessing the irreversible heat transfer process. The method presented here enables to evaluate precisely processes occurring in power plant condensers. This real process is of particular interest as it involves a number of thermal layers through which heat transfer is observed. The analysis was performed using a simple, known in the literature and well verified Berman’s model of steam condensation in the presence of non-condensable gases. Adapted to the geometry of the condenser, the model enables, for instance, to recognise places where non-condensable gases are concentrated. By describing with sufficient precision thermodynamic processes taking place in the vicinity of the heat transfer area segment, it is possible to determine the distributions of thermodynamic parameters on the boundaries between successive layers. The obtained results allow for the recognition of processes which contribute in varying degrees to irreversible energy degradation during steam condensation in various parts of the examined device.
Źródło:
Archives of Thermodynamics; 2018, 39, 4; 3-32
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the optimal control problem for two regions’ macroeconomic model
Autorzy:
Surkov, P. G.
Powiązania:
https://bibliotekanauki.pl/articles/229669.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
integrated assessment model for evaluating greenhouse gases reduction policies
optimal control
Pontryagin’s maximum principle
Opis:
In this paper we consider a model of joint economic growth of two regions. This model bases on the classical Kobb-Douglas function and is described by a nonlinear system of differential equations. The interaction between regions is carried out by changing the balance of trade. The optimal control problem for this system is posed and the Pontryagin maximum principle is used for analysis the problem. The maximized functional represents the global welfare of regions. The numeric solution of the optimal control problem for particular regions is found. The used parameters was obtained from the basic scenario of the MERGE
Źródło:
Archives of Control Sciences; 2015, 25, 4; 417-427
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
TG/DTG/DTA, FTIR and GC/MS Studies of Oil Sand for Artistic and Precision Foundry with the Emission of Gases Assessment
Autorzy:
Bobrowski, A.
Żymankowska-Kumon, S.
Drożyński, D.
Grabowska, B.
Kaczmarska, K.
Powiązania:
https://bibliotekanauki.pl/articles/382154.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
molding sand
thermal analysis
emission of gases
FTIR
GC/MS
masa formierska
analiza termiczna
emisja gazowa
Opis:
The paper presents the results of thermoanalytical studies by TG/DTG/DTA, FTIR and GC/MS for the oil sand used in art and precision foundry. On the basis of course of DTG and DTA curves the characteristic temperature points for thermal effects accompanying the thermal decomposition reactions were determined. This results were linked with structural changes occurred in sample. It has been shown that the highest weight loss of the sample at temperatures of about 320°C is associated with destruction of C-H bonds (FTIR). In addition, a large volume of gases and high amounts of compounds from the BTEX group are generated when liquid metal interacts with oil sand. The results show, that compared to other molding sands used in foundry, this material is characterized by the highest gaseous emissions and the highest harmfulness, because benzene emissions per kilogram of oil sand are more than 7 times higher than molding sand with furan and phenolic binders and green sand with bentonite and lustrous carbon carrier.
Źródło:
Archives of Foundry Engineering; 2017, 17, 4; 25-30
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiparameter Assessment of the Gas Forming Tendency of Foundry Sands with Alkyd Resins
Autorzy:
Mocek, J.
Powiązania:
https://bibliotekanauki.pl/articles/383265.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gases
moulding sand
casting defects
cast iron
pressure
gazy
masa formierska
żywice alkidowe
wady odlewnicze
żeliwo
Opis:
Gas atmosphere at the sand mould/cast alloy interface determines the quality of the casting obtained. Therefore the aim of this study was to measure and evaluate the gas forming tendency of selected moulding sands with alkyd resins. During direct and indirect gas measurements, the kinetics of gas evolution was recorded as a function of the temperature of the sand mixture undergoing the process of thermal destruction. The content of hydrogen and oxygen was continuously monitored to establish the type of the atmosphere created by the evolved gases (oxidizing/reducing). The existing research methodology [1, 7, 8] has been extended to include pressure-assisted technique of indirect measurement of the gas evolution rate. For this part of the studies, a new concept of the measurement was designed and tested. This article presents the results of measurements and compares gas emissions from two sand mixtures containing alkyd resins known under the trade name SL and SL2002, in which the polymerization process is initiated with isocyanate. Studies of the gas forming tendency were carried out by three methods on three test stands to record the gas evolution kinetics and evaluate the risk of gas formation in a moulding or core sand. Proprietary methods for indirect evaluation of the gas forming tendency have demonstrated a number of beneficial aspects, mainly due to the ability to record the quantity and composition of the evolved gases in real time and under stable and reproducible measurement conditions. Direct measurement of gas evolution rate from the tested sands during cast iron pouring process enables a comparison of the results with the results obtained by indirect methods.
Źródło:
Archives of Foundry Engineering; 2019, 2; 41-48
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studies on the Gases Emission of Moulding and Core Sands with an Inorganic Binder Containing a Relaxation Additive
Autorzy:
Bobrowski, A.
Żymankowska-Kumon, S.
Kaczmarska, K.
Drożyński, D.
Grabowska, B.
Powiązania:
https://bibliotekanauki.pl/articles/379837.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
moulding sand
aluminosilicates
geopolymer
inorganic binder
gases emission
piasek formierski
glinokrzemiany
geopolimer
spoiwo nieorganiczne
emisja gazów
Opis:
The paper presents the results of an investigation of the gases emission of moulding sands with an inorganic (geopolymer) binder with a relaxation additive, whose main task is to reduce the final (residual) strength and improves knocking-out properties of moulding sand. The moulding sand without a relaxation additive was the reference point. The research was carried out using in accordance with the procedure developed at the Faculty of Foundry Engineering of AGH - University of Science and Technology, on the patented stand for determining gas emissions. Quantification of BTEX compounds was performed involving gas chromatography method (GC).The study showed that the introduction of relaxation additive has no negative impact on gas emissions - both in terms of the total amount of gases generated, as well as emissions of BTEX compounds. Among the BTEX compounds, only benzene is emitted from the tested moulding sands. Its emission is associated with the introduction a small amount of an organic hardener from the group of esters.
Źródło:
Archives of Foundry Engineering; 2020, 20, 2; 19-25
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Molding Sand Technology Between Alphaset (APNB) and Furan (FNB)
Autorzy:
Ghosh, Dipak K.
Powiązania:
https://bibliotekanauki.pl/articles/381891.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Alphaset
Furan
foundries
molding sand
heat strength
residual strength
gases
environment
odlewanie
piasek formierski
wytrzymałość cieplna
Opis:
The paper focuses on investigation of properties of two most widely used self-set sand binder systems APNB and FNB across the Globe, for making molds and cores in foundries to produce castings of different sizes involving wide range of metals and alloys, ferrous and nonferrous. This includes study of compression strength values of samples made out of molding sand at different binder addition level using new, mechanically reclaimed (MR) and thermally reclaimed (TR) sand. Strength values studied include dry strength (at room temperature) at specified intervals simulating different stages of mold handling, namely stripping and pre heating, followed by degraded strength after application of thinner based zircon wash by brush, subsequent lighting of, then checking strength both in warm (degraded strength) & cold (recovered strength) conditions. Throughout the cycle of mold movement from stripping to knock out, strength requirements can be divided into two broad classifications, one from stripping to closing (dry strength) and another from pouring to knock out (hot & retained strength). Although the process for checking of dry strength are well documented, no method using simple equipments for checking hot & retained strength are documented in literature. Attempts have been made in this paper to use some simple methods to standardize process for checking high strength properties using ordinary laboratory equipments. Temperature of 450°C has been chosen by trial & error method to study high temperature properties to get consistent & amplified values. Volume of gases generated for both binders in laboratory at 850°C have also been measured. Nature of gases including harmful BTEX and PAH generated on pyrolysis of FNB and APNB bonded sands are already documented in a publication [1]. This exercise has once again been repeated in same laboratory, AGH University, Poland with latest binder formulations in use in two foundries in India.
Źródło:
Archives of Foundry Engineering; 2019, 4; 11-20
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Review of Surface Acoustic Wave Sensors for the Detection and Identification of Toxic Environmental Gases/Vapours
Autorzy:
Panneerselvam, G.
Thirumal, V.
Pandya, H. M.
Powiązania:
https://bibliotekanauki.pl/articles/176789.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
toxic gases
SAW
surface acoustic wave
SAW sensors
E-Nose
electronic nose
gas sensors
selective coating
Opis:
Detection and identification of toxic environmental gases have assumed paramount importance precisely in the defense, industrial and civilian security sector. Numerous methods have been developed for the sensing of toxic gases in the environment ever since surface acoustic wave (SAW) technology came into existence. Such SAW sensors called electronic nose (E-Nose) sensor use the frequency response of a delay line/resonator. SAW device is focused and given importance. The selective coating between input and output interdigital transducers (IDTs) in the SAW device is responsible for corresponding changes in operating frequency of the device for a specific gas/vapour absorbed from the environment. A suitable combination of well-designed SAW delay lines with selective coatings not only help to improve sensor sensitivity and selectivity but also leads to the minimization of false frequency alarms in the E-Nose sensor. This article presents a comprehensive review of design, development, simulation and modelling of a SAW sensor for potential sensing of toxic environmental gases.
Źródło:
Archives of Acoustics; 2018, 43, 3; 357-367
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the Hardener on the Emission of Harmful Substances from Moulding Sands with Furan Resin in the Pyrolysis Process
Autorzy:
Holtzer, M.
Kmita, A.
Żymankowska-Kumon, S.
Bobrowski, A.
Dańko, R.
Powiązania:
https://bibliotekanauki.pl/articles/380824.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
furan resin
mould sand
emission of gases
pyrolisis
BTEX
PAH
żywica furanowa
masa formierska
emisja gazów
piroliza
Opis:
The furan resin offers advantages such as high intensity, low viscosity, good humidity resistance and is suitable for cast different casting alloys: steel, cast iron and non-ferrous metal casting. For hardening furan resins are used different hardeners (acid catalysts). The acid catalysts have significant effects on the properties of the cured binder (e,g. binding strength and thermal stability) [1 - 3]. Investigations of the gases emission in the test foundry plant were performed according to the original method developed in the Faculty of Foundry Engineering, AGH UST. The analysis is carried out by the gas chromatography method with the application of the flame-ionising detector (FID) (TRACE GC Ultra THERMO SCIENTIFIC).
Źródło:
Archives of Foundry Engineering; 2016, 16, 1; 107-111
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Transformations of mercury in processes of solid fuel combustion : review
Przemiany rtęci w procesach spalania paliw stałych
Autorzy:
Czaplicka, M.
Pyta, H.
Powiązania:
https://bibliotekanauki.pl/articles/204838.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mercury
coal combustion
homogeneous reactions
heterogeneous reaction
flue gases
rtęć
spalanie węgla
homogeniczna reakcja
heterogeniczna reakcja
spaliny
Opis:
The paper presents current reports on kinetics and mechanisms of reactions with mercury which take place in the exhaust gases, discharged from the processes of combustion of solid fuels (coals). The three main stages were considered. The first one, when thermal decomposition of Hg components takes place together with formation of elemental mercury (Hg0). The second one with homogeneous oxidation of Hg0 to Hg2+ by other active components of exhaust gases (e.g. HCl). The third one with heterogeneous reactions of gaseous mercury (the both - elemental and oxidised Hg) and solid particles of fly ash, leading to generation of particulate-bound mercury (Hgp). Influence of exhaust components and their concentrations, temperature and retention time on the efficiency of mercury oxidation was determined. The issues concerning physical (gas-solid) and chemical speciation of mercury (fractionation Hg0-Hg2+) as well as factors which have influence on the mercury speciation in exhaust gases are discussed in detail.
Artykuł stanowi podsumowanie aktualnego stanu wiedzy nt. kinetyki i mechanizmów reakcji z udziałem rtęci, w tym reakcji homogenicznych i heterogenicznych, zachodzących w spalinach z procesów spalania paliw stałych. Opisano wpływ składników spalin i temperatury na efektywność utleniania rtęci. Omówiono również zagadnienia fizycznej i chemicznej specjacji rtęci w gazach spalinowych, jak również wpływ różnych czynników na specjację rtęci.
Źródło:
Archives of Environmental Protection; 2017, 43, 4; 82-93
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physico-Chemical and Environmental Characterisation of the Dust from Dry Dedusting of the Green Sand
Autorzy:
Bobrowski, A.
Grabowska, B.
Żymankowska-Kumon, S.
Kurleto-Kozioł, Ż
Powiązania:
https://bibliotekanauki.pl/articles/382689.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dust
dedusting
physico-chemical investigations
heavy metals
emission of gases
zapylenie
odpylanie
badania fizykochemiczne
metale ciężkie
emisja gazów
Opis:
The article presents research results of physico-chemical and environmental issues for the dust generated during dedusting of the installation for the processing and preparation of moulding sand with bentonite. Particular attention was paid to the content of heavy metals and emission of gases from the BTEX group, which is one of the determinants of the moulding sands harmfulness for the environment. The analysis of heavy metals in the test samples indicate that there is an increase of the content of all metals in the dust compared to the initial mixture of bentonite. The most significant (almost double) increase observed for zinc is probably related to the adsorption of this element on the dust surface by contact with the liquid metal. The study showed, that dust contained more than 20% of the amount of montmorillonite and had a loss on ignition at a similar level. The addition of 1% of dust to the used moulding sand results in almost 30% increase in the total volume of gases generated in casting processes and nearly 30% increase of the benzene emission.
Źródło:
Archives of Foundry Engineering; 2016, 16, 4; 33-36
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Main micro-jet cooling gases for steel welding
Ważniejsze gazy do mikro-jetowego spawania stali
Autorzy:
Węgrzyn, T.
Piwnik, J.
Łazarz, B.
Hadryś, D.
Powiązania:
https://bibliotekanauki.pl/articles/351174.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
welding
micro-jet cooling gases
weld
metallographic structure
acicular ferrite
spawanie
gazy do mikrojetowego spawania
struktura metalograficzna
ferryt
Opis:
An article presents actual information about innovate welding technology with micro-jet cooling. There are put down information about gases that could be chosen for micro-jet process. There were given information about influence of various micro-jet gases on metallographic structure of steel welds.
W artykule przedstawiono innowacyjną technologię spawania z chłodzeniem mikro-jetowym. Podano informacje nt gazów, które mogą być wybrane dla mikro-jetowego procesu. Uzyskano informacje o wpływie doboru gazu mikro-jetowego na strukturę metalograficzną stalowych spoin.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 2; 555-557
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 26

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