Electrothermal production of ferroalloy from tripoli
Shevko V.M. Mirkayev N.M. Aitkulov D.K.
4 July 2023Institute of Metallurgy and Ore Beneficiation JSC
Kompleksnoe Ispolzovanie Mineralnogo Syra
2023#324Issue 150 - 56 pp.
The article presents the research results on the electrothermal production of a ferroalloy from an amorphous sedimentary rock tripoli. The studies were carried out by electric melting in a single electrode arc furnace using the second-order rotatable experiment planning (Box-Hunter plan). The influence of the amount of coke and steel chips on the degree of extraction of silicon into the alloy and the content of silicon in it is determined. It was found that silicon from tripoli to ferroalloy passes by 49-90.6%, and the silicon content in the alloy is 28-48%. Ferrosilicon grade FS25 (23.0-29% Si) is formed in the presence of 30-33.6% coke and 40.6-45.0% steel chips, grade FS45 (41-46.6% Si) with 32.1-40.9% coke and 26.2-37.0% steel chips. The maximum degree of silicon extraction (90.0-90.3%) in FS45 grade ferrosilicon (42.6-43.5% Si) is observed in a small coke range (36.0-37.3%) and steel chips (33.0-35.2%). Using tripoli instead of quartzite in the charge makes it possible to reduce the duration of the process by 1.2 times.
electric melting , ferroalloys , ferrosilicon , thermodynamics , tripoli
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M. Auezov South Kazakhstan University, Shymkent, Kazakhstan
National Center on complex processing of mineral raw materials of the Republic of Kazakhstan, Almaty, Kazakhstan
M. Auezov South Kazakhstan University
National Center on complex processing of mineral raw materials of the Republic of Kazakhstan
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