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针对钒钛磁铁矿的特点及利用难点,研究了钒钛磁铁矿气基还原过程及其影响因素,讨论了还原温度、还原时间、还原气氛和气体流量对钒钛磁铁矿还原率和金属化率的影响。试验结果表明,钒钛磁铁矿试样在还原温度为1 000℃,还原时间为2 h,还原气氛为21%CO+55%H2+24%N2,还原气体流量为13.26 L/min的条件下,可得到还原率为96.72%,金属化率为92.05%的良好结果。采用气基竖炉直接还原工艺流程,能够将钒钛磁铁矿中的铁氧化物还原为金属铁,实现铁的高效富集。
According to the characteristics and utilization difficulties of vanadium-titanium magnetite, the gas-based reduction process of vanadium-titanium magnetite and its influencing factors were studied. The effects of reducing temperature, reduction time, reducing atmosphere and gas flow on the reduction rate and Effect of metallization rate. The results show that the sample of vanadium titanomagnetite has a reduction temperature of 1 000 ℃, a reduction time of 2 h, a reducing atmosphere of 21% CO + 55% H2 + 24% N2 and a reducing gas flow rate of 13.26 L / min , A good result was obtained with a reduction rate of 96.72% and a metallization rate of 92.05%. The direct reduction process using gas-based shaft furnace can reduce the iron oxides in the vanadium-titanium magnetite into metallic iron to realize high-efficiency iron enrichment.