通过在钒钛磁铁精矿中添加还原煤粉和少量添加剂,研究了还原温度、还原时间和添加剂等因素对钒钛磁铁精矿金属化率的影响,并对添加剂强化还原机理进行了探讨.结果表明:还原温度、还原时间、碳铁摩尔比及添加剂对金属化率的影响较大.在还原温度1200℃、还原时间120 min的条件下,未添加添加剂时金属化率最高可达84.5%;添加质量分数3.0%Na2CO3或CaF2的条件下,钒钛磁铁精矿的金属化率可以分别达到96.5%和93.3%. The effect of reducing temperature, reduction time and additives on the metallization rate of vanadium-titanium magnetite concentrate was studied by adding reducing coal powder and a few additives into the vanadium-titanium magnetite concentrate, and the mechanism of strengthening and reducing additive was discussed.Results The results show that the reduction temperature, the reduction time, the molar ratio of carbon to iron and the additives have a great influence on the metallization rate.With the reduction temperature of 1200 ℃ and the reduction time of 120 min, the metallization rate can reach as high as 84.5% without additives. With the addition of 3.0% Na2CO3 or CaF2, the metallization rate of vanadium-titanium magnetite concentrate can reach 96.5% and 93.3% respectively.