Study on the Relationship between Carbon Consumption and Direct Reduction of Iron in Low Grade Ore

In the blast furnace smelting,the consumption of carbon is determined by the sum of the calorific carbon consumption and the carbon loss of the reduction reaction.During the smelting process,as the direct reduction of iron rdincreases,the direct reduction carbon consumption increases,and as the reaction consumes a lot of heat,calorific carbon consumption should also increase,causing a high production costs.Therefore,reducing the rdvalue as low as possible,in order to reduce carbon consumption and reduce costs during smelting process. In this paper,the relationship between carbon consumption,gas utilization rate and iron direct reduction degree is obtained by calculating the carbon consumption and iron reduction degree of low grade ore blast furnace. Combined with the actual smelting,the furnace material selection,smelting conditions and other aspects of improvement measures for the blast furnace smelting had been proposed to reduce costs and provide the reference for energy conservation.