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Micro carbon ferrochrome use

2019-11-13
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Electro-silicon smelting of micro-carbon ferrochrome Electro-silicon smelting of micro-carbon ferrochrome is to add chrome ore, silicon-chromium alloy and lime to the electric arc furnace, and mainly rely on electric heat to melt the charge, and the silicon in the silicon-chromium alloy reduces the Cr2O3. Chromite powder

The equipment used in the electrosilicone smelting of micro-carbon ferrochrome is an electric arc furnace. It is divided into two types: open and covered. The power is below 500kV.A, and it is equipped with on-load regulating voltage device to meet the needs of different operating periods. The furnace lining is made of magnesium bricks and graphite electrodes are used. The main raw materials for smelting micro-carbon ferrochrome by electrosilicon method are chrome ore, silicon chromium alloy and lime. There are also fluorite and iron scales. Chromium ore should be dry and clean lump ore or concentrate, with a block size of less than 50mm; containing Cr2O3> 40%, Cr2O3 / ∑FeO> 2.0, and phosphorus content should not be greater than 0.03%. According to the grade of smelted micro-carbon ferrochrome, silicon-chromium alloys with different carbon contents are selected.



Heat-dip smelting micro-carbon ferrochrome The heat-dip smelting micro-carbon ferro-chromium process is to heat-dip the pre-melted chrome ore-lime melt and the molten iron outside the silicon-chromium alloy furnace to obtain micro-carbon ferrochrome . The heat exchange process can be divided into one step heat exchange method, two step heat exchange method, and three step heat exchange method according to the number of stages of reduction of Cr2O3 in the slag.


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