Introduction To Carbon Ferrochrome

Smelting using a reduction electric furnace, using coke as the reducing agent and silica or bauxite as the flux. The slag composition is generally SiO227-33%, MgO3 0-34%, Al2O326-30%, and Cr2O3<9.0%. Due to the formation of chromium carbide, the product contains 4-9% carbon. The capacity of modern reduction electric furnaces for smelting ferrochromium is 10000~48000 kVA, generally using a closed fixed type, with a smelting power consumption of 3000~4000 kWh/ton. The electric furnace for smelting silicon chromium alloy is similar to the chromium iron reduction electric furnace, and there are two smelting methods: one-step method and two-step method. The one-step smelting process uses chromite, silica, coke and flux. The two-step method uses carbon ferrochromium, silica, and coke as raw materials for slag free smelting, and the smelting process is generally similar to that of ferrosilicon production. The electricity consumption for smelting is around 3000-4000 kilowatt hours per ton.