含钛高炉渣提钛技术研究现状及展望

Research progress and prospect on titanium extraction from titanium-bearing BF slag

含钛高炉渣是钒钛磁铁矿高炉炼铁工艺的主要固体废弃物,是钢铁工业固废资源化综合利用的难点和热点。近年来含钛高炉渣的综合利用更侧重于钛元素的提取技术研究,从湿法冶金(硫酸法、盐酸法、硫酸-盐酸法、氨水法)和火法冶金(碳化法、钠化法、熔盐法、铝热法)两大类别工艺流程概述了含钛高炉渣提钛技术的研究进展。不同提钛工艺流程各有优缺点,但总体而言,尤其是在目前较为严苛的环境政策条件下,火法冶金工艺流程更具工业化应用前景。

Titanium-bearing blast furnace(BF)slag is the main solid waste from BF ironmaking process with vanadium-titanium magnetite as raw materials.It is a difficult point for the comprehensive utilization of solid waste resources in the steel industry.In recent years,the research on comprehensive utilization of titanium-bearing BF slag focuses more on extraction technology of titanium element.In this paper,the research progress in extraction technology of titanium-bearing blast furnace slag is summarized from two categories:hydrometallurgy(sulfuric acid method,hydrochloric acid method,sulfuric acid-hydrochloric acid method,and ammonia-water method)and fire metallurgy(carbonation,sodium method,molten salt method,and aluminothermics).There are advantages and disadvantages in different technologies of titanium extraction,but in general,especially under the conditions of strict environmental protection policy,the fire metallurgy processes have a broader industrial application prospect.