Smelting of High-Carbon Ferrochrome from Prereduced Chromite Raw Materials of the Donskoy Ore Mining and Processing Plant

• Published in: Metallurgist (New York) Vol. 66; no. 11-12; pp. 1619 - 1624
• Main Authors: Shotanov, A. E., Nurgali, N. Z., Roshchin, A. V., Panfilov, V. P., Baysanov, S. O., Almagambetov, M. S., Dossekenov, M. S.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2023; Springer; Springer Nature B.V
• Subjects: Batch type furnaces; Carbon; Characterization and Evaluation of Materials; Chemistry and Materials Science; Chlorofluorocarbons; Chromite; Chromium; Coke fired furnaces; Energy consumption; Ferrochromium; Hydrochlorofluorocarbons; Materials Science; Melting; Metallic Materials; Metallizing; Metallurgy; Mineral industry; Mining industry; Power consumption; Raw materials; Smelting furnaces; Spinel group; Kazakhstan; ferrochrome; tunnel furnace; Höganäs; ore-smelting furnace; pre-reduction; degree of metallization; DC furnace
• ISSN: 0026-0894; 1573-8892
• DOI: 10.1007/s11015-023-01477-5

Experimental smelting of three batches of prereduced chromite raw materials with different degrees of metallization of chromium was conducted in the 0.2 MVA ore-smelting furnace of the Chemical and Metallurgical Institute named after Zh. Abishev (Karaganda). To assess the performance indicators of the remelting of prereduced chromite raw materials in industrial direct-current furnaces, a batch of base charge consisting of chromite ore, coke fines, and quartz flux and intended for smelting high-carbon ferrochrome (HCFC) was smelted at a separate stage. The dependence of the specific power consumption for the smelting of HCFC in the pilot furnace on the degree of metallization of chromium in the range of 0–65% was determined. The data obtained made it possible to estimate the parameters of the smelting of HCFC from a prereduced product with different degrees of metallization of chromium in a 72 MW furnace. The results show the possibility of reducing the specific power consumption by half, up to 3.4 MW∙h/t of chromium, with the degree of chromium metallization in the prereduced product being 65%.