铝粉对钒钛磁铁精矿碳热还原及熔分过程的影响
Effects of aluminum on the carbothermic reduction of vanadium-titanium magnetite concentrate and melting separation

研究了铝粉对钒钛磁铁精矿碳热还原及熔分过程的影响。结果表明：添加铝粉能提高钒钛磁铁精矿碳热还原反应速率。铝粉添加量越大，还原反应越快。在还原反应过程中，铝热还原反应的发生放出了大量热量，并在其反应界面周围形成局部高温，从而强化碳热还原反应过程，同时促进新生金属铁聚集长大。添加1%铝粉可稍微改善渣金分离；当铝粉添加量大于2%时，由于TiC的生成，渣的流动性变差，渣铁分离效果恶化。
The effect of aluminum powder on the carbothermal reduction process of vanadium-titanium magnetite concentrate was studied. The results show that the addition of aluminum powder can promote the rate of carbothermic reduction of vanadium-titanium magnetite concentrate. During the reduction process, aluminum powder replaces carbon as a reductant to participate in the reduction reaction, which releases a large amount of heat to cause local high temperature around it, thereby promoting the progress of the carbothermic reduction reaction and promoting the accumulation of new metal iron. The addition of 1% aluminum powder can slightly improve the separation of slag and metal; when the amount of aluminum powder added is more than 2%, the fluidity of the slag becomes difficult due to the formation of TiC, and the separation effect of slag and metal is deteriorated