Thermodynamic prediction and experimental production of silicon alloys from tailings leaching of oxidized copper ore almaly
Nurpeisova A.M. Shevko V.M. Aitkulov D.K. Joldassov A.A.
2023National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2023#2023Issue 2188 - 196 pp.
The article presents the results of studies on the production of silicon-containing ferroalloys from the tailings of sulfuric acid leaching of oxidized copper ore from the Almaly deposit. The studies were carried out by the method of thermodynamic modeling using the HSC — 6.0 rototable second-order planning complex (Box – Hunter plan) and electric charge melting in an arc single-electrode furnace. The influence of temperature, carbon, and charge composition on the production of siliceous alloys was determined. It was found that under equilibrium conditions from the tailings in the temperature range 1903–in the presence of 52– 66% carbon and 24% iron, it is possible to form ferrosillicoaluminium grade FeSi45A10 at 1753–1875°C and 34-66% carbon ferrosillium grade FeSi45, and in the temperature range 1796–19500C, 34–66% carbon Fe-Si- Al ligature containing 2,0–7,5 Al and 45,9–47,5% Si. During electric melting of charges containing 52–54% tailings, 25–28% coke and 20-21% steel chips of ferrosillium grade FeSi45 (41,3% Siand 1,3% Al) and ferrosillicoaluminium grade FeSi45A10 (43,4% Siand 7,4% Al) with extractions to the alloy up to 79,8% Siand 50,8% Al.
Electric melting , Fe-Si-Al ligature , Ferrosilicoaluminium , Ferrosilicon , Leaching tailings , Oxidized copper ore , Thermodynamic prediction
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M. Auezov University of South Kazakhstan, Shymkent, Kazakhstan
National Research Center for Integrated Processing of Mineral Raw Materials of the Republic of Kazakhstan, Almaty, Kazakhstan
Satbayev University, Almaty, Kazakhstan
M. Auezov University of South Kazakhstan
National Research Center for Integrated Processing of Mineral Raw Materials of the Republic of Kazakhstan
Satbayev University
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