ABSTRACT

In response to the problem of rich vanadium–titanium magnetite (VTM) resources in China contrasting with low blast furnace utilization, a HIsmelt process for smelting VTM is proposed. The influence of the process parameters on smelting reduction is analysed under laboratory conditions by simulating smelting reduction. The results show that extending the reaction time reduces the FeO content in the slag by 15.34 wt-%, increasing the reaction temperature reduces the FeO content in the slag by 26.38 wt-%, and increasing the basicity reduces the FeO content in the slag by 11.26 wt-%. The control temperature for smelting VTM using the HIsmelt process is 1425°C, with a reduction time of 20–30 min, which is conducive to the transfer of vanadium to the molten iron and the enrichment of titanium in the slag. To ensure vanadium and titanium are efficiently utilized, a basicity control of 0.8 is appropriate.

摘要

针对我国钒钛磁铁矿（VTM）资源丰富而高炉利用率低的问题，提出了冶炼VTM的HIsmelt工艺。通过模拟熔融还原，在实验室条件下分析了工艺参数对熔融还原的影响。结果表明，延长反应时间使炉渣中FeO含量降低15.34 wt-%，提高反应温度使炉渣中FeO含量降低26.38 wt-%，提高碱度使炉渣中FeO含量降低26.38 wt-%。 11.26 重量％。HIsmelt工艺熔炼VTM的控制温度为1425℃，还原时间为20~30min，有利于钒向铁水中的转移和渣中钛的富集。