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    Tytuł:
    Analysis of Multicriteria Optimisation in the Decopperisation Process of Flash Smelting Slags
    Autorzy:
    Wędrychowicz, M.
    Bydalek, A. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/380053.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    calcium fluoride
    slag viscosity
    flash slag
    decopperisation process
    fluorek wapnia
    lepkość żużla
    żużel zawiesinowy
    proces odmiedziowania
    Opis:
    This article presents results of studies on multicriteria optimisation in the decopperisation process of flash smelting slags coming from the process of decopperisation at the "Głogów II" Copper Smelter. Measurements of viscosity were conducted using a high-temperature viscometer manufactured by Brookfield company. An addition in the form of calcium fluoride has an advantageous influence on decreasing the liquidus temperature of slag, and the effect of decreasing viscosity at the participation of calcium fluoride is significant. A motivation to conduct studies on viscosity of decopperised slags is an optimisation of the process of decopperisation at an improvement of this process parameters, i.e. the time of melt per one production cycle and consumption of electric power in the whole process. The efficiency of optimisation of the process course depends not only on an accepted criterion of the quality of controlling, a type of technological parameters, but also, to large extent, on characteristics and features of these parameters. CaCO3 currently added to the process of decopperisation efficiently decreases viscosity of flash slag, at the same time has influence on an increase of the yield of copper in alloy, but on the other hand, it increases the mass of slag, artificially under representing concentration of this metal. The article is completed with a conclusion of discussed issues, stating that a search for a new technological addition is still necessary.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 2; 131-136
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Concept of Optimizing the Decopperisation of Slag Slurry in Electrical Furnace
    Autorzy:
    Wędrychowicz, M.
    Bydałek, A. W.
    Wołczyński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/381620.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    slag slurry
    manufacture optimization
    decopperisation
    zawiesina żużla
    optymalizacja produkcji
    odmiedziowanie
    Opis:
    This paper presents the idea of increasing the effectiveness of slag decopperisation in an electric furnace in the "Głogów II" Copper Smelter by replacing the currently added CaCO3 with a less energy-intensive technological additive. As a result of this conversion, one may expect improved parameters of the process, including process time or power consumption per cycle. The incentives to optimize the process are the benefits of increasing copper production in the company and the growing global demand for this metal. The paper also describes other factors that may have a significant impact on the optimization of the copper production process. Based on the literature analysis, a solution has been developed that improves the copper production process. The benefits of using a new technology additive primarily include increased share of copper in the alloy, reduced production costs, reduced amount of power consumed per cycle and reduced time it takes to melt. At the conclusion of the paper, the issues raised are highlighted, stressing that mastering the slag slurry process in electric furnaces requires continuous improvement.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 4; 169-174
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in the SUSPPUP ratio and fractional excretion of strong monovalent electrolytes in hospitalized dogs with canine babesiosis
    Autorzy:
    Zygner, W.
    Gojska-Zygner, O.
    Wedrychowicz, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/30454.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    In this study an increased SUSPPUP ratio and fractional excretion of potassium in dogs infected with Babesia canis suggested mineralocorticoid excess in canine babesiosis. A significant increase in strong monovalent electrolyte fractional excretions in azotaemic dogs infected with B. canis probably resulted from acute tubular necrosis.
    Źródło:
    Polish Journal of Veterinary Sciences; 2012, 15, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Slag Activity on Corrosion of Ceramic Materials in a Slurry Furnace
    Autorzy:
    Wędrychowicz, M.
    Bydałek, A. W.
    Basiura, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/380075.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    furnace lining
    ceramic material
    corrosion
    flash furnace slag
    copper
    Opis:
    The article discusses the process of copper production in a slurry furnace and in a converter, with the indication of corrosion effects of the extractor. The furnace shaft and settling furnace of the flash furnace were analyzed. The basic factors determining the choice of single-stage technology of copper smelting in relation to the exploitation of refractory materials were indicated. The effects of dissolving the furnace lining material through slag have been presented. Structural analysis results using a scanning microscope are also included. The kinetics of destruction of ceramic materials under the influence of copper slag were evaluated. It has been shown that detailed analyzes are necessary in order to extend the time of furnace extensibility of furnaces in copper processes. The surface layer of the crucible softens due to saturation with slag reagents and is then washed out and moves in the solid form to the slag. The research in the article indicate not only the possibility of dissolution of the ceramic material in the molten slag, but also possibility of erosive activity of the slag on that material.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 3; 95-100
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Increased AST/ALT ratio in azotaemic dogs infected with Babesia canis
    Autorzy:
    Zygner, W.
    Gojska-Zygner, O.
    Norbury, L.J.
    Wedrychowicz, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/31893.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dog
    animal disease
    infection
    Babesia canis
    azotemia
    canine babesiosis
    babesiosis
    kidney injury
    protozoan parasite
    Opis:
    The AST/ALT ratio was estimated in 182 dogs infected with Babesia canis. Among these dogs 65 had anaemia and 68 were azotaemic. Student’s t test was used to compare means of the AST/ALT ratio in anaemic and non-anaemic dogs, and in azotaemic and non-azotaemic dogs (p < 0.05). The differences in AST/ALT ratio between anaemic (1.52 ± 1.15) and non-anaemic (1.76 ± 1.34) dogs were statistically insignificant (p = 0.23), however, the comparison of AST/ALT ratio between azotaemic (2.68 ± 1.52) and non-azotaemic (1.08 ± 0.53) dogs revealed a significantly higher value of this index in azotaemic dogs (p = 0.00). The present results suggest that kidney injury contributed to increased AST activity in these dogs.
    Źródło:
    Polish Journal of Veterinary Sciences; 2012, 15, 3
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recovery of Tellurium From Sodium Carbonate Slag
    Odzysk telluru z żużli sodowych
    Autorzy:
    Kucharski, M.
    Madej, P.
    Wędrychowicz, M.
    Sak, T.
    Mróz, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/354186.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    tellurium recovery
    crude silver
    refining
    sodium carbonate slag
    odzysk telluru
    żużel sodowy
    rafinacja
    węglan sodu żużla
    Opis:
    This study is devoted to tellurium recovery from sodium carbonate slag, formed in the fire refining process of crude silver. The slag was modified by silica additions and then reduced by carbon oxide. The degree of the slag modification was defined by the parameter kw. The compositions of the investigated slag determined by the parameter kw and the mole fraction of the tellurium oxide (xTeO2) are given in the following Table. The reduction of tellurium was very fast for all the investigated slags, which was manifested by an almost complete conversion of CO into CO2. Unfortunately, at the same time, a side reaction took place, and as a results sodium telluride was formed, which reported to the slag: (Na2O)slag+ Teg + CO = (Na2Te)slag + CO2. The tellurium content in the reduced slag decreases as the parameter kw increases, and only the slag with the kw equal unity was suitable for the tellurium recovery in form of dusts, containing more than 76 wt-% tellurium.
    Praca jest poświęcona odzyskowi telluru z żużla sodowego, który tworzy się podczas rafinacji ogniowej srebra. żużel ten był modyfikowany dodatkiem krzemionki, a następnie poddawany redukcji za pomocą tlenku węgla. Stopień modyfikacji żużla określał parametr kw. Składy badanych żużli wyrażonych za pomocą parametru kw oraz ułamka molowego tlenku telluru (xTeO2) zawiera poniższa tabela. Redukcja telluru przebiegała bardzo szybko w przypadku każdego z badanych żużli, co przejawiało się poprzez prawie kompletna konwersje CO do CO2. Niestety, w tym samym czasie przebiegała reakcja uboczna w wyniku której tworzył się tellurek sodu, który rozpuszczał się w żużlu: (Na2O)uel+ Teg + CO = (Na2Te)uel + CO2Stężenie telluru w żużlu malało wraz ze wzrostem parametru kw. Ale dopiero żużel charakteryzujący się parametrem kw = 1 okazał się odpowiedni do odzysku telluru, który przechodził do pyłów zawierających ponad 76% telluru.
    Źródło:
    Archives of Metallurgy and Materials; 2014, 59, 1; 51-57
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimisation of a Production System in the Process of Remelting of Post-Reduction Slag by Applying New Physical and Chemical Conditions
    Autorzy:
    Bydałek, A. W.
    Wołczyński, W.
    Wędrychowicz, M.
    Holtzer, M.
    Basiura, B.
    Palimąka, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/379861.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    product development
    quality management
    decopperisation process
    flash smelting slag
    production system optimisation
    rozwój produktu
    zarządzanie jakością
    proces odmiedziowania
    żużel zawiesinowy
    Opis:
    Production processes at KGHM are complex and require from customers products of constantly higher quality at relatively lowest prices. Such situation results in an increase of the importance of optimisation of processes. As products and technologies change rapidly, technologists at the plant in Głogów have less time to achieve optimisation basing on own experiences. Analysing a particular process, we can e.g. detect occurring disturbances, find factors having an influence on quality problems, select optimal settings or compare various production procedures. Analysis of the course of production process is the basis of process optimisation. One optimisation in case of the process of decopperisation of flash slag can be a change of a technological additive to a less energy-consuming one, and its final result can be an improvement of the productivity index, a change of the relation between final effects and born expenditures, as well as optimisation of production costs.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 5-8
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diffusion Path in Ternary One-Phase Systems: An Overview
    Autorzy:
    Serafin, D.
    Nowak, W. J.
    Wierzba, P.
    Wędrychowicz, S.
    Wierzba, Bartek
    Powiązania:
    https://bibliotekanauki.pl/articles/175705.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    inter-diffusion
    up-hill diffusion
    diffusion path
    Opis:
    In this article, the fundamental questions concerning the diffusion path, in particular, what is the shape of diffusion path in ternary systems and how to approximate it from the initial concentration profile, will be answered. The new rules were found which allow for determining the diffusion path from a known initial concentration of the components. This approximation will allow for designing new materials without a time-consuming numerical simulation of the full system of equations. It is shown that the difference in intrinsic diffusion coefficients determines the up-hill diffusion.
    Źródło:
    Advances in Manufacturing Science and Technology; 2020, 44, 1; 1-8
    0137-4478
    Pojawia się w:
    Advances in Manufacturing Science and Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Analysis of the Selected Products From the Suspension Furnace Produced in the Internal Recycling
    Autorzy:
    Bydałek, A. W.
    Schlafka, P.
    Grządko, K.
    Wołczyński, W.
    Kwapisiński, P.
    Bromber, S.
    Wędrychowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/382682.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    slag
    copper recovery
    recycling
    żużel
    odzyskiwanie miedzi
    recykling
    Opis:
    There are presents the internal recycling in anode furnace, in addition to mainly blister copper and converter copper. During the process there arise the two types of semi-finished products intended for further pyro metallurgical processing: anode copper and anode slag. The stream of liquid blister copper enters into the anode furnace treatment, in which the losses are recovered, e.g. copper, resulting from oxidation and reduction of sulfides, oxides and the oxidation of metallic compounds of lead, zinc and iron. In the liquid phase there are still gaseous states, which gives the inverse relationship relating to the solid phase, wherein the gases found an outlet in waste gas or steam. The results of chemical analysis apparently differ from each other, because crystallite placement, the matrix structure and the presence of other phases and earth elements are not compared, which can be regained in the process of electrorefining. One should not interpret negatively smaller proportion of copper in the alloy, since during the later part of the production more elements can be obtained, for example from sludge, such as platinum group metals and lanthanides. According to the research the quality of blister copper, to a large extent, present in the alloy phase to many other elements, which can be recovered.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 2; 9-14
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Adding Iron Powder From Plasma Cutting on the Microstructure, Mechanical Properties of the Composite Based on Aluminum Powder Matrix Made Using Powder Metallurgy
    Autorzy:
    Wędrychowicz, M.
    Bydałek, A. W.
    Migas, P.
    Skrzekut, T.
    Noga, P.
    Madej, P.
    Kałasznikow, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049543.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al-Fe composite
    iron powder
    plasma cutting
    aluminum matrix composites
    powder metallurgy
    mechanical properties
    Opis:
    The paper presents the results of research on the effect of added iron powder from plasma cutting on the mechanical properties and structure of a composite rod based on aluminum powder. The iron powder came from plasma cutting of steel elements and was handed over by the enterprise “AK Anatol” from Żary. One of the ways to dispose of it is to use it as a filler in aluminum composite rods. Research shows that Fe can be distributed in aluminum evenly, and increase in mechanical properties is achieved at the expense of only a slight increase in density. The proposed system does not reduce the amount of waste produced by plasma cutting but finds a use for some of it. The sintering point of the powder required a strongly reducing atmosphere (Po2 < 10-50 atm) which seems virtually unachievable under laboratory conditions. The reinforcing mechanism is related to the fragmentation of the matrix aggregate particles and the uniform distribution of Fe particles in the aluminum matrix.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 273-279
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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