钙法提钒尾渣的绿色资源化利用

Clean,high efficiency and green utilization of vanadium tailings extracted by calcium process

以钙法提钒尾渣为研究对象,通过对尾渣成分、物相和主要元素赋存状态的分析,在结合前人研究的基础上,提出了钙法提钒尾渣通过物理法和火法冶金分离技术制取含钒铁合金及含钛炉渣的综合利用途径。研究表明:提钒尾渣经摇床脱硫处理后,分离出石膏渣和含钒富铁料,石膏渣供水泥厂使用,含钒富铁料配加一定比例的还原剂、粘接剂成球后,在矿热炉进行熔分还原冶炼,可获得钒含量3%左右的含钒铁合金及TiO2含量36%左右的还原渣,含钒铁合金可用于含钒钢水合金化;还原渣可用于高钛渣冶炼。能实现钙法提钒尾渣中的有价元素铁、钒、钛等有效提取与回收以及减轻环保压力。

Calcium extraction of vanadium tailings was taken as research object,the composition,phase and occurrence state of main elements of the tailings were analyzed.On the basis of combining previous studies,the comprehensive utilization of vanadium-bearing alloy and titanium-bearing furnace slag from calcium-based vanadium extraction tailings by physical method and pyrometallurgical separation technology is put forward.Studies have shown that after the removal of vanadium tailings by shaking desulfurization treatment,gypsum residue and iron-rich vanadium material were separated,gypsum residue is used in cement plants.V/Fe-rich material with a certain proportion of reducing agent and adhesive mixed press into pellets,smelting by ore-thermal furnace smelting reduction,ferroalloys with a vanadium content of about 3%and reduction slag containing about 36%TiO2were obtained,V-containing ferroalloys can be used for alloying V-containing molten steel,and reduced slag can be used for smelting high titanium slag.It can be exploited for effective extraction and recovery of valuable elements such as Fe,V and Ti from calcium-based extraction of vanadium tailings and can reduce the environmental pollution.