采用KOH亚熔盐处理钛中矿富集钛资源研究  

Study on enrichment of titanium resources by treating titanium middling ore with KOH sub molten salt

作　　者：邹敏 王琪琳 江文世 Zou Min;Wang Qilin;Jiang Wenshi(College of Science,Xichang University,Xichang 615013,Sichuan,China)

机构地区：[1]西昌学院理学院,四川西昌615013

出　　处：《钢铁钒钛》2022年第5期30-34,44,共6页Iron Steel Vanadium Titanium

基　　金：先进钢铁流程及材料国家重点实验室2019年开放性基金(2019018)资助。

摘　　要：采用KOH亚熔盐处理钛中矿以实现钛资源的富集,考察了反应温度、反应时间、碱浓度和钛中矿粒度等因素对钛中矿分解情况的影响,采用X射线衍射分析了产物的物相,得出下述结论:(1)采用KOH亚熔盐处理钛中矿可实现钛中矿的有效分解,其较佳工艺参数为搅拌速度400 r/min,碱渣质量比6∶1,反应温度为240℃,反应时间180 min,碱浓度为80%,原料粒度70~80μm,在此反应条件下,钛中矿中钛的转化率达99%以上,铝的转化率98%以上,硅的转化率在85%以上;(2)X射线衍射分析表明,亚熔盐分解产物经800℃的高温煅烧3 h后测得的产物主要为六钛酸钾(K_(2)Ti_(6)O_(13)),说明KOH可有效分解钛中矿并去除其中的铝、硅等元素。The treatment of titanium middling ore with KOH sub molten salt was studied to realize the enrichment of titanium resources. The effects of reaction temperature, reaction time, alkali concentration and particle size on the decomposition of titanium middling ore were investigated, and the phase of the product was analyzed by X-ray diffraction. The following conclusions were drawn. Firstly, the effective decomposition can be realized by treating titanium middling ore with KOH sub molten salt. The better process parameters include stirring speed of 400 r/min, alkali residue mass ratio of 6∶1, reaction temperature of 240 ℃, reaction time of 180 min, alkali concentration of 80%, raw material particle size of 70~80 μm. Under these reaction conditions, the decomposition rate of titanium in the ore is more than99%, while the decomposition rate of aluminum and silicon is more than 98% and 85%, respectively.Secondly, X-ray diffraction analysis shows that the decomposition product of sub molten salt is mainly potassium hexatitanate(K_(2)Ti_(6)O_(13))after calcination at 800 ℃ for 3 h, indicating that KOH can effectively decompose titanium middling ore and remove aluminum, silicon and other elements.

关 键 词：提钛 钛中矿 KOH亚熔盐 分解率 

分 类 号：TD951[矿业工程—选矿] TF823[冶金工程—有色金属冶金]