Electrothermal production of ferroalloy from tripoli

V.M. Shevko; N.M. Mirkayev; D.K. Aitkulov

doi:10.31643/2023/6445.07

Authors

V.M. Shevko M.Auezov South Kazakhstan University
N.M. Mirkayev M. Auezov South Kazakhstan University
D.K. Aitkulov National Center on complex processing of mineral raw materials of the Republic of Kazakhstan

DOI:

https://doi.org/10.31643/2023/6445.07

Keywords:

tripoli, electric melting, thermodynamics, ferroalloys, ferrosilicon

Abstract

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.

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Author Biographies

V.M. Shevko, M.Auezov South Kazakhstan University

Doctor of technical sciences, professor, head of the Department of Metallurgy of M. Auezov South Kazakhstan University. Tauke Khan Avenue, 5, 160002, Shymkent, Kazakhstan.

N.M. Mirkayev, M. Auezov South Kazakhstan University

Doctoral student of the Department of Metallurgy of M. Auezov South Kazakhstan University. Tauke Khan Avenue, 5, 160002, Shymkent, Kazakhstan.

D.K. Aitkulov, National Center on complex processing of mineral raw materials of the Republic of Kazakhstan

Doctor of technical sciences, professor, director of scientific research of National Center on complex processing of mineral raw materials of the Republic of Kazakhstan. Zhandosov st., 67, 050036, Almaty, Kazakhstan.

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