摘要 利用碳热还原方法研究了硅铁添加对钛精矿还原及渣铁分离效果的影响.结界表明:硅铁可提高还原反应速率和铁的金属化率，在1380℃还原30min的金属化率达到84.5%.添加硅铁还可明显缩短还原球团冶炼周期，降低渣中金属铁含量，提高渣铁分离效率及钛渣品位(TiO2的质量分数为84.75%).同时运用FactSage软件对钛渣液相线及黏度进行了理论计算，结果表明:添加硅铁对钛渣黏度影响不大，但可增大钛渣的液相区域，从而有利于金属铁的聚集长大及分离.理论计算很好地解释了实验结果.Abstract：The influence of Fe-Si additive for the reduction of ilmenite and its separation between iron and slag after smelting were discussed by the carbotherme reduction method. The results show that Fe-Si can improve the reduction rate and metallization. 84.5% of the metallization can be achieved after reduction of 30min at 1380℃. The reduction pellets’ smelting cycle can be shorten， and the separation efficiency of slag with iron and the titanium slag’s grade can be improved if adding Fe-Si. The TiO2 in the titanium slag can be reached 84.75%. The titanium slag liquidus and viscosity were calculated by FactSage software， and the result shows that the viscosity of the titanium slag has no obvious change， but the liquid area of titanium slag can be increased， which is beneficial to the accumulation， growing up and separation of metallic iron. Theoretical calculations well explain the experimental results.
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