低钛型钒钛磁铁矿深度还原-磨选分离试验

Experimental Research on Deep Reduction and Grinding Separation of Low Ti-bearing Vanadium-titanium Magnetite

对某低钛型钒钛磁铁矿进行深度还原-磨选分离试验,结果表明:还原温度1 050℃,还原时间10 h,是抑制钒还原的临界条件;使用添加剂和延长还原时间能够强化钒钛磁铁矿还原,其中硼砂能够有效促进钒钛磁铁矿还原,硼砂用量3%时,产物金属化率达98.21%,而Ca F2在本试验条件下对还原起到抑制作用,弱磁选并深度细磨有利于铁、钒分离。

Experimental research on deep reduction and grinding separation of a certain low Ti-bearing vanadium-titanium magnetite was conducted. The results show that the critical conditions for inhibiting the reduction of vanadium are reduction at 1 050 ℃ for 10 h. The reduction of vanadium-titanium magnetite can be enhanced by additives and extension of reduction time. Borax can efficiently promote the reduction of the vanadium-titanium magnetite, and the metallization rate of product reaches 98.21% with 3% borax added. However, inhibitory effects on reduction were observed with CaF2 in the experiments. Low intensity magnetic separation and deep grinding are beneficial to separate Fe and V.