The ferrochromium smelting by electrosilicon heating method is carried out in a fixed three-phase electric arc furnace. Self-baking electrodes can be used. The furnace lining is made of magnesium brick (dry building). The short life of the lining is an important issue in the production of low and medium carbon ferrochromium. Due to the high smelting temperature (up to 1650 degrees Celsius), the life of the lining is generally short.
The raw materials for smelting low-carbon ferrochrome include chromium ore, silicon-chromium alloy and lime. The chromium ore should be dry and pure lump ore ore powder. The higher the Cr2O3 content, the better, and the lower the impurity content, the better. The phosphorus content in chrome ore should not be greater than 0.03%, and the particle size is less than 60mm. The silicon-chromium alloy should be broken, with a particle size of less than 30mm, and no slag. The lime should be freshly burned, with a CaO content of not less than 85%.
