钒钛磁铁矿直接还原技术研究进展

Progress in research of direct reduction of vanadium-titanium magnetite

钒钛磁铁矿是一种含钒、钛、铁和其它有价元素如钪、铬、钴、铜、镍等多种元素共生的复合矿,因而具有很高的利用价值,目前主要采用高炉-转炉法冶炼钒钛磁铁矿,但该流程存在着诸多弊端,基于此背景,本文绍当前几种典型直接还原技术,将先提铁的工艺分为:直接还原-电炉法和直接还原-磁选法,将先提机的工艺分为钒钛磁铁矿精矿钠化焙烧-水浸提钒和钒钛磁铁矿精矿钙化焙烧-酸浸提钒。综述了当前几种典型直接还原技术的研究现状,为今后钒钛磁铁矿资源综合利用提供参考。同时,通过对比和分析不同直接还原技术的应用现状和特点,发现竖炉-电炉法具有良好的应用前景,是未来钒钛磁铁矿资源综合利用的发展方向。

Vanadium-titanium magnetite is a kind of complex ore that contains vanadium, titanium, iron and other valuable elements such as scandium, chromium, cobalt, copper, nickel and other elements, so it has a high utilization value. The smehing of vanadium-titanium magnetite by the blast furnace and converter-smelting process has many disadvantages. Based on this background, this paper presents several typical direct reduction technologies. The process of extracting iron is divided into ： direct reduction-electric furnace method and direct reduction-magnetic separation, the vanadium extraction process is mainly divided into vanadium-titanium magnetite concentrate sodium-soda roasting-water-leaching vanadium and vanadium-titanium magnetite concentrates calcification roasting-acid- leaching vanadium extraction. The current research status of several typical direct reduction technologies is reviewed, which provides reference for the comprehensive utilization of vanadium-titanium magnetite resources in the future. At the same time, by comparing and analyzing the application status and characteristics of different direct reduction technologies, it is found that the shaft furnace-electric furnace method has good prospect of application, which is the development direction of comprehensive utilization of vanadium-titanium magnetite resources in the future.