直接还原处理钒钛矿资源的几种典型工艺评述

对新西兰钢铁公司、南非海威尔德钢钒公司、中国攀钢资源综合利用中试线分别采用的钒钛矿处理工艺进行了详细阐述。新西兰钢铁公司和海威尔德采用回转窑直接还原—电炉熔炼—含钒铁水提钒工艺,只能提取钒钛矿中的铁和钒,钛进入熔分渣,TiO2品位低,提取困难。攀钢采用转底炉直接还原—熔分电炉深还原—提钒工艺,熔分过程不调渣,含钛炉渣品位较高,稳定在45%以上,可利用传统的硫酸法提钛,实现了钒钛磁铁矿铁、钒、钛的回收利用。介绍直接还原处理钒钛矿的工艺方法,对钒钛矿资源以及类似的多金属共生矿的开发利用有借鉴作用。

Study on the Comparison of the Several Typical Processes for Dealing with Vanadium Titanium Magnetite Resources

Processes of dealing with vanadium titanium magnetite iron ore in three different enterprises have been expounded and the three enterprises include The New Zealand Steel, Highveld Steel Vanadium Corp Ltd in South Africa and Panzhihua Iron and Steel Corporation in China. The New Zealand Steel and Highveld corporation adopt rotary kiln direct reduction EAF smelting DRI extracting vanadium from vanadium bearing hot metal process, however, this process just recover the Fe and V in the iron ore but the Ti enters into the slag of EAF which is difficult to be extracted because of the low grade of the TiO2. Panzhihua Iron and Steel Corporation applies the rotary hearth furnace (RHF) direct reduction EAF deep reduction vanadium extraction process and there is no other materials except DRI and reductant feel into the EAF, so the TiO2 content in the slag reaches 45% which is higher than that of the other corporations and the Ti element could be extracted by the traditional sulfuric acid method. The process provided by Panzhihua steel can recover the Fe, V and Ti in the vanadium titanium magnetite and opens up a new way for the ore utilization.