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.
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