Temat: ferrosilicon - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Theoretical and experimental substantiation of obtaining an alloy from flotation tailings of lead-zinc sulfide ore
Autorzy:: Shevko, Victor M.
Makhanbetova, Baktygul A.
Aitkulov, Dosmurat K.
Powiązania:: https://bibliotekanauki.pl/articles/2200342.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: lead-zinc ore
cinder
enrichment tailings
thermodynamic modeling
electric melting
ferrosilicon
lead-zinc sublimates
Opis:: The article presents the results of thermodynamic and experimental research on the processing of cinders from the firing of Shalkiya deposit lead-zinc ore tailings with the production of siliceous ferroalloys. Thermodynamic modeling carried out using the HSC-6.0 complex based on the Gibbs energy minimization principle showed that the interaction occur with the formation of CaSiO3, FeSiO3, MgSiO3, K2OˑSiO2, FeSi, Fe5Si3, SiC, Fe3Si, Si, SiOg, FeSi2.33, FeSi2, CaSi, Zn, Zng, Pb, Pbg; an increase in the iron amount in the system allows increasing the silicon extraction degree into the alloy at 1800°C to 76%, to reduce the silicon concentration in the alloy from 41 to 24%; FS25 grade ferrosilicon formed at 1752-1867°C in the presence of 88-100% iron, and FS45 grade ferrosilicon – at 1863-1900°C and 20-22.4% iron. Electric melting of a charge containing 63.83% calcined cinder of tailings, 19.15% coke, and 17.02% steel chips allows to obtain FS45 grade ferrosilicon (44.1-43.9% Si) with the extraction of 69.7% silicon and sublimates with the content of 32-38% zinc and lead. The results obtained allow complex processing of lead-zinc sulfide ore tailings with the extraction of not only non-ferrous metals, but also silicon in the ferroalloy.
Źródło:: Physicochemical Problems of Mineral Processing; 2023, 59, 1; art. no. 161853
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Similarity of Ferrosilicon Submerged Arc Furnaces With Different Geometrical Parameters
Autorzy:: Machulec, B.
Gil, A.
Bialik, W.
Powiązania:: https://bibliotekanauki.pl/articles/356113.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: submerged-arc furnace
ferrosilicon
similarity k
c3
J1
Opis:: In order to determine reasons of unsatisfactory production output regarding one of the 12 MVA furnaces, a comparative analysis with a furnace of higher power that showed a markedly better production output was performed. For comparison of ferrosilicon furnaces with different geometrical parameters and transformer powers, the theory of physical similarity was applied. Geometrical, electrical and thermal parameters of the reaction zones are included in the comparative analysis. For furnaces with different geometrical parameters, it is important to ensure the same temperature conditions of the reaction zones. Due to diverse mechanisms of heat generation, different criteria for determination of thermal and electrical similarity for the upper and lower reaction zones were assumed contrary to other publications. The parameter c₃ (Westly) was assumed the similarity criterion for the upper furnace zones where heat is generated as a result of resistive heating while the parameter J₁ (Jaccard) was assumed the similarity criterion for the lower furnace zones where heat is generated due to arc radiation.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 4; 2343-2347
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Relation Between Active Power of the Submerged Arc Furnace and the Electric Energy Consumption Indicator in the Process of Ferrosilicon Smelting
Autorzy:: Machulec, B.
Bialik, W.
Gil, S.
Powiązania:: https://bibliotekanauki.pl/articles/353158.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: ferrosilicon
FeSi65
FeSi75
submerged arc furnace
active power of furnace
electric energy consumption
Opis:: Higher active power of a submerged arc furnace is commonly believed to increase its capacity in the process of ferrosilicon smelting. This is a true statement but only to a limited extent. For a given electrode diameter d, there is a certain limit value of the submerged arc furnace active power. When this value is exceeded, the furnace capacity in the process of ferrosilicon smelting does not increase but the energy loss is higher and the technical and economic indicators become worse. Maximum output regarding the reaction zone volumes is one of parameters that characterize similarities of furnaces with various geometrical parameters. It is proportional to d³ and does not depend on the furnace size. The results of statistical analysis of the ferrosilicon smelting process in the 20 MVA furnace have been presented. In addition to basic electrical parameters, such as active power and electrical load of the electrodes, factors contributing to higher resistance of the furnace bath and resulting lower reactive power P_x demonstrate the most significant effect on the electrothermal process of ferrosilicon smelting. These parameters reflect metallurgical conditions of ferrosilicon smelting, such as the reducer fraction, position of the electrodes and temperature conditions of the reaction zones.
Źródło:: Archives of Metallurgy and Materials; 2019, 64, 2; 633-638
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Conditions for The Preparation of Stable Ferrosilicon Dust Briquettes
Uwarunkowania wytwarzania trwałych brykietów z pyłów żelazokrzemu
Autorzy:: Hycnar, J. J.
Borowski, G.
Józefiak, T.
Powiązania:: https://bibliotekanauki.pl/articles/318323.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Przeróbki Kopalin
Tematy:: ferrosilicon
briquettes
water glass
starch
żelazokrzem
brykiety
szkło wodne
skrobia
Opis:: The article presents the results of the selection of optimal conditions for the preparation of mixture and the briquetting conditions for obtaining stable ferrosilicon dust briquettes. The dust of 0–3 mm grain size fractionswhich are residues (by-products) of ferrosilicon melting processwas analyzed. Briquetting of dust allows obtainingvery solid agglomerates. The method of material preparation was to add a particular quantity of binder to dust and mixing them carefully. An adhesive of the water glass withor without addition an aqueous solution of starch were used. The addition of water glass to ferrosilicon in the amount of about 6% allows manufacturing tough briquettes, however, the application of adhesives in the form of a mixture of water glass (about 2.0%) and starch (about 3.0%) found to obtain higher strength parameters. Finding the binder allowed to develop of industrial production technology of high-quality ferrosilicon briquettes, which are suitable for use in domestic and foreign steel foundries. Briquettes are not to crumble and dissolve easy when adding for melting to recovery of silicon.
W artykule przedstawiono wyniki badań nad doborem optymalnych warunkówprzygotowania mieszanki i brykietowania dla uzyskania trwałych brykietów z pyłów żelazokrzemu. Analizowano pyły o frakcji ziarnowej 0–3 mm, które stanowią pozostałości (produkty uboczne) procesu wytapiania żelazokrzemu.Brykietowaniepyłów umożliwiło uzyskanie bardzo zwartych aglomeratów. Sposób przygotowania materiału polegał na dodaniu do pyłów określonej ilości spoiwa oraz dokładnym ich wymieszaniu. Stosowano spoiwa z samego szkła wodnego oraz z dodatkiem skrobi w roztworze wodnym. Stwierdzono, że dodatek szkła wodnego do żelazokrzemu w ilości ok. 6% gwarantuje tworzenie trwałych brykietów, jednakże zastosowanie mieszaniny spoiw w postaci szkła wodnego (ok. 2,0%) i skrobi (ok. 3,0%) zapewnia otrzymanie brykietów o wyższych parametrach wytrzymałościowych. Dobór spoiwa umożliwił opracowanie technologii przemysłowej produkcji wysokiej jakości brykietów z pyłów żelazokrzemu,które nadają się do wykorzystania w krajowych i zagranicznych odlewniach stali. Brykiety te nie kruszą się i łatwo rozpuszczają w przypadku dodania do wytopu w celu odzysku krzemu.
Źródło:: Inżynieria Mineralna; 2014, R. 15, nr 1, 1; 155-162
1640-4920
Pojawia się w:: Inżynieria Mineralna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Comparison the Physico-Chemical Model of Ferrosilicon Smelting Process with Results Observations of the Process under the Industrial Conditions
Autorzy:: Machulec, B.
Bialik, W.
Powiązania:: https://bibliotekanauki.pl/articles/351005.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: ferrosilicon
model
equilibrium
FEM
submerged-arc furnace
Opis:: Based on the minimum Gibbs Free Enthalpy algorithm (FEM), model of the ferrosilicon smelting process has been presented. It is a system of two closed isothermal reactors: an upper one with a lower temperature T₁, and a lower one with a higher temperature T₂. Between the reactors and the environment as well as between the reactors inside the system, a periodical exchange of mass occurs at the moments when the equilibrium state is reached. The condensed products of chemical reactions move from the top to the bottom, and the gas phase components move in the opposite direction. It can be assumed that in the model, the Reactor 1 corresponds to the charge zone of submerged arc furnace where heat is released as a result of resistive heating, and the Reactor 2 corresponds to the zones of the furnace where heat is produced by electric arc. Using the model, a series of calculations was performed for the Fe-Si-O-C system and was determined the influence of temperatures T₁, T₂ on the process. The calculation results show a good agreement model with the real ferrosilicon process. It allows for the determination of the effects of temperature conditions in charge zones and arc zones of the ferrosilicon furnace on the carbothermic silica reduction process. This allows for an explanation of many characteristic states in the ferrosilicon smelting process.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 1; 265-270
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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