Microcarbon ferrochromium is mainly used in the production of stainless steel, acid resistant steel, and heat resistant steel. The smelting methods include silicothermic method and hot mixing method. High carbon chromium iron powder

Smelting method: The electrosilicothermal method for smelting low-carbon ferrochromium involves adding chromium ore, silicon chromium alloy, and lime to an electric arc furnace. The furnace material is mainly melted by electric heating, and the silicon in the silicon chromium alloy reduces Cr2O3 in the chromium ore.

Electric arc furnace is a device for smelting low-carbon ferrochromium using silicothermic method. It can be divided into open type and closed type, with power below 500 kV. 1、 And equipped with an on load voltage regulating device, high carbon chromium iron powder to meet the needs of different operating periods. The furnace lining is built with magnesium bricks and graphite electrodes are used. The main raw materials for smelting low-carbon ferrochromium using the electro silicothermic method are chromium ore, silicon chromium alloy, and lime. Some have added fluorite and grinding scales. Chromium ore should be a dry and clean bulk ore or concentrate with a particle size of less than 50 millimeters;; Cr2O3 content>40%, Cr2O3/∑ FeO>2.0, phosphorus content should not exceed 0.03%. Select silicon chromium alloys with different carbon contents based on the grade of smelting low-carbon ferrochrome.

The process of smelting low-carbon ferrochromium using the hot mixing method involves the hot mixing of pre melted chromite lime melt and silicon chromium alloy in the ladle outside the furnace to prepare low-carbon ferrochromium. According to the reduction times of Cr2O3 in the slag, the hot mixing process can be divided into one-step hot mixing method, two-step hot mixing method, and three-step hot mixing method.