The smelting process of ferrochrome with different carbon content is briefly introduced
Ferrochrome according to different carbon content is divided into high carbon ferrochrome (including charge grade ferrochrome), medium carbon ferrochrome, low carbon ferrochrome, micro carbon ferrochrome and so on. The smelting process of ferrochrome with different carbon content is different. Next, the ferrochrome supplier will explain to you:
1, low carbon ferrochrome: there are mainly two smelting methods of low carbon ferrochrome: high carbon ferrochrome refining method and electric silicon thermal method. The method of refining high carbon ferrochrome is divided into refining high carbon ferrochrome with chrome ore and refining high carbon ferrochrome with oxygen. When chromium ore concentrate is used for high carbon ferrochrome, the refining slag has higher viscosity and melting point, and the smelting temperature should be higher. The traditional production method is still electrosilicon thermal method. Electrosilicon-thermal method is to reduce the oxide of chromium and iron with the silicon in the silicon-chromium alloy under the condition of making basic slag in the electric furnace, so as to produce medium and low carbon ferrochrome.
2, micro carbon ferrochrome: micro carbon ferrochrome is mainly used in the production of stainless steel, acid resistant steel and heat resistant steel. The smelting methods of micro - carbon ferrochrome include electric silicon heating method and heat exchange method. Electrosi-thermal method of micro-carbon ferrochrome smelting is chromium ore, silicon chromium alloy and lime into the arc furnace, electrosi-thermal method of micro-carbon ferrochrome smelting mainly rely on electric heat to melt the charge, the silicon in the silicon chromium alloy reduction chromium ore Cr2O3 and made. The process of micro - carbon ferrochrome smelting by heat transfer is to prepare micro - carbon ferrochrome by heat transfer operation in pre-melted chrome ore - lime melt and si-Cr alloy ladle.
3, high carbon ferrochrome: high carbon ferrochrome smelting methods include blast furnace method, electric furnace method, plasma furnace method, etc. Special pig iron containing chromium can only be produced by blast furnace. As of 2012, high carbon ferrochrome with high chromium content is mostly smelted in the furnace by flux.
