通过建立高炉冶炼预还原炉料数学模型，计算了原料铁品位、预还原炉料金属化率和铁的存在形态对高炉冶炼能耗的影响，比较了高炉冶炼预还原炉料和传统高炉的能耗。计算结果表明：针对不同铁品位原料，有一个适合高炉冶炼的炉料最佳金属化率，使高炉冶炼焦比最低；预还原炉料中的铁以硅酸铁形式存在时，主要进行直接还原，冶炼焦比较高；与传统高炉相比，高炉冶炼预还原炉料，可以大幅度降低焦比，但燃料比升高。
Mathematical model of blast furnace ironmaking process using pre-reduced burden was established . The iron grade of raw material , metallization rate of pre-reduced iron ore and combined form of iron effect on energy consumption of blast furnace was calculated. Energy consumption of blast furnace ironmaking using pre-reduced burden between tradi-tional blast furnace was compared. The results show that according to different iron grade of raw material, there is a suit-able metallization rate of pre-reduced burden, make the lowest coke ratio of blast furnace smelting. If the iron in the pre-reduced burden is in the form of iron silicate, the blast furnace coke ratio is high because iron silicate direct reduc-tion is strongly endothermic reaction. Blast furnace ironmaking process using pre-reduced burden can greatly reduce coke ratio, but increase fuel consumption.
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