Processing of micro carbon ferrochrome powder

The production process of medium, low and micro-carbon ferrochrome by traditional Chinese method is generally known as the "three-step method" or electrosilicon-thermal method: that is, the first one produces high-carbon ferrochrome by using three electric furnace, and then produces silicon-chromium alloy by using high-carbon ferrochrome as raw material in the second platform, and then produces medium-low and micro-carbon ferrochrome by using silicon-chromium alloy as raw material in the third _L. Foreign countries usually use the "Boren method", also need 3 electric furnace, but the difference is the furnace outside the "invert", so that chromium ore, lime melt and silicon chromium alloy full reaction to produce low, micro carbon ferrochrome. These two methods are based on the principle that the affinity of silicon and oxygen is greater than that of carbon, and the reduction of CrZO in chromium ore: after, because of the low carbon content of silicon chromium alloy, low and micro-carbon ferrochrome containing 0.5% to 0.06% carbon can be obtained. Hydrogen and oxygen refining process is a process of producing high quality stainless steel. The equipment used is AOD furnace. This process is to pour the molten steel coarsed in the electric furnace into the AOD furnace.

The main raw materials of electrosilicothermal smelting of micro - carbon ferrochrome are chromium ore, silicon chromium alloy and lime. Some also add fluorite and iron scales. Chromium ore should be a dry, clean block ore or concentrate with a block size of less than 50mm. Select silicon chromium alloy with different carbon content according to the grade of micro-carbon ferrochrome powder smelted.