Abstract
The article presents the research results of the carbon ferrochrome dust processing from Aktobe Ferroalloy Plant (Branch of TNC Kazchrome JSC). The research was carried out by electrofusion of granular dusts in the presence of steel shavings and coke using a one-phase single-electrode arc furnace. The electrofusion was carried out in accordance with the second-order rototable planning matrix (Box-Hunter plan). The effect of the amount of steel shavings, coke and the electrofusion duration on the production of ferroalloy from carbon ferrochrome dusts was determined. It was established that the formation of ferrochrome silicon FeCrSi22 occurs in the presence of 24.2-29.8% coke and 4.0-5.1% steel shavings; the alloy contains 20-20.2% silicon, 55-56.6% chromium; the degree of silicon extraction is 52.1-53.3% and of chromium 98.6-99.3%. The formation of ferrochrome silicon FeCrSi23 occurs in the presence of 4-11.7% steel shavings and 20-36% coke; the silicon extraction into the alloy is 51.2-61.0%, and of chromium 97.7-99.0%. The ferroalloy contains 45-57.2% Si and 18.0-22.4% Cr.