STUDY ON LOW-CARBON SMELTING PROCESS OF HIGH CARBON FERROCHROME
Fine chrome ore has become the main raw material for the smelting of high carbon ferrochrome in China.With the expansion of the capacity of the submerged arc furnace,the smelting method of high carbon ferrochrome mainly using the reduction smelting method of the submerged arc furnace allows for a smaller proportion of fine ore to be added.In order to achieve deep carbon reduction in China's high carbon ferrochrome smelting,the low-carbon smelting will be studied that basing on the development of chromium ore resources,large-scale arc furnaces,the smel-ting of clinker and hot materials in this paper.Smelting practice shows that,the chrome sinter,chrome oxidized pellets and pre-reduced chrome pellets were respectively put into the arc furnace,and the 100%chromium pre-reduced pel-lets were used with hot charging into the arc furnace.The daily output of ferroalloy was increased to 260 t,the power consumption was reduced to 2100 kWh/t,the chromium content in slag was reduced to 3%,and the benefit of smel-ting reduction pellet was the most obvious.Therefore,hot charging smelting of oxidized or reduced pellets are the im-portant technical approach to achieve low-carbon smelting of high carbon ferrochrome.
chromitehot charging smeltinghigh-carbon ferrochromelow-carbon smeltingsmelting power consumption
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