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    Wyświetlanie 1-4 z 4
    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:
    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:
    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:
    Reagents Activity in a Copper Droplets / Post-Processing Slag Suspension
    Autorzy:
    Wołczyński, W.
    Karwan-Baczewska, J.
    Najman, K.
    Bydałek, A. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/383208.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    slag
    liquid slag
    post-processing
    coagulation
    sedimentation
    copper droplets
    flash furnace
    żużel
    koagulacja
    sedymentacja
    miedź
    piec typu flash
    Opis:
    The suspension of the copper droplets in the post-processing slag taken directly from the KGHM-Polska Miedź S.A. Factory (from the direct-to-blister technology as performed in the flash furnace) was subjected to the special treatment with the use of the one of the typical industrial reagent and with the complex reagent newly patented by the authors. This treatment was performed in the BOLMET S.A. Company in the semi-industrial conditions. The result of the CaCO3, and Na2CO3 chemicals influence on the coagulation and subsequent sedimentation of copper droplets on the crucible bottom were subjected to comparison with the sedimentation forced by the mentioned complex reagent. The industrial chemicals promoted the agglomeration of copper droplets but the coagulation was arrested / blocked by the formation of the lead envelope. Therefore, buoyancy force forced the motion of the partially coagulated copper droplets towards the liquid slag surface rather than sedimentation on the crucible bottom. On the other hand, the complex reagent was able to influence the mechanical equilibrium between copper droplets and some particles of the liquid slag as well as improve the slag viscosity. Finally, the copper droplets coagulated successfully and generally, were subjected to a settlement on the crucible bottom as desired / requested.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 147-150
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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