中文摘要：

采用回归正交法设计实验,在实验室用电阻炉模拟转底炉工艺研究了温度、时间、配碳量、金属粉配比和钠盐配比等因素对钒钛磁铁矿碳热还原过程中的金属化率和失氧率的影响。对试验结果回归,建立了金属化率、失氧率与因素间的关系模型,并解决和验证了各因素的优化解。结果表明,添加金属粉和钠盐后钒钛磁铁矿还原温度明显降低;添加2.5%金属粉和0.5%钠盐,还原温度在1280℃左右,还原时间30min左右,配碳量22.7%时,钒钛磁铁矿还原的金属化率可达到95%以上。

英文摘要：

A test was designed with orthogonal regression, and in laboratory using electric furnace to simulate RHF （rotary hearth furnace ） process to investigate the effects of temperature, time, carbon rate, powdered metal and sodium salt ratio on the metallization rate and loss-oxygen rate during V-Ti magnetite ore carbothermal reduction process. The experiment results were regressed and the relation model was built up between the rate of metallization and loss-oxygen and parameters, and the optimized solution was obtained and validated. The results showed that the reduction temperature of V-Ti magnetite ore with powdered metal and sodium salt could be reduced obviously. And the rate of metallization could be achieved over 95% under the condition of 2.5% of powdered metal, 0. 5% of sodium salt, temperature about 1280 ℃, and time about 30 min.