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在添加硼砂的条件下进行了煤基直接还原-球磨磁选分离钒钛磁铁精矿中铁和钒钛的研究。试验中分别考查了还原温度、还原时间、磨矿细度和磁场强度对钒钛磁铁精矿的还原磨选行为的影响。结果表明,在1 050℃下还原100 min,磨矿细度为-0.045 mm占84.88%以及磁场强度800 Gs时,钒钛磁铁精矿通过还原-球磨磁选后获得的铁精粉品位高达90.32%,铁回收率达到95.20%,可用于电炉炼钢;其尾矿为富钒钛料,可用于钒钛回收利用。
Under the condition of adding borax, coal - based direct reduction - ball milling magnetic separation of vanadium - titanium magnetite concentrate of iron and vanadium and titanium research. The effects of reduction temperature, reduction time, grinding fineness and magnetic field strength on reduction and grinding behavior of vanadium-titanium magnetite concentrate were investigated respectively. The results showed that the grade of iron ore powder obtained by reduction-ball milling magnetic separation was as high as 90.32 after grinding at 1 050 ℃ for 100 min, grinding fineness of -0.045 mm (84.88%) and magnetic field strength of 800 Gs %, The iron recovery rate reached 95.20%, can be used for electric steelmaking; the tailings of vanadium-rich titanium material can be used for vanadium and titanium recycling.