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研究了常压下向钒浸出液中加入硫酸铁沉淀结晶型Fe4(VO4)4.5H2O,考察了温度、pH和添加剂C对沉淀产物钒酸铁的影响。对沉淀产物进行X-射线衍射(XRD)分析和电子扫描电镜观察,结果表明:沉淀产物的n(V)/n(Fe)和钒沉淀率随pH和温度的升高而下降;加入添加剂C有利于钒酸铁的结晶,同时提高产物的n(V)/n(Fe)和钒沉淀率;最佳沉淀条件为:pH为23,反应温度90℃,反应时间72 h,加入添加剂C,此条件下,沉淀产物为Fe4(VO4)4.5H2O,n(V)/n(Fe)接近于1,粒度尺寸主要分布在5~15μm范围内,钒沉淀率在97%以上,。
Abstract：The crystalline Fe4(VO4)4 5H2O was precipitated at normal pressure from mixing vanadium leaching solution using Fe2(SO4)3.The effects of reaction temperature,pH and additive C on n(V)/n(Fe) of precipitate and vanadium precipitation ratio were investigated.The precipitate was characterized by X-ray diffraction(XRD) and observed by scanning electron microscope(SEM).The results showed that precipitate n(V)/n(Fe) and vanadium precipitation ratio decreased with increasing of pH and reaction temperature.Additive C can increase n(V)/n(Fe) and vanadium precipitation ratio.The best conditions obtained were reaction temperature of 90 ℃,pH of 23,reaction time of 72 h and existence of additive C.Under the conditions,n(V)/n(Fe) of precipitate was close to 1,vanadium precipitation ratio was over 97%,precipitate was conformed as crystalline Fe4(VO4)4·5H2O and grain size of 5~15 μm.
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基本信息:
DOI：10.13355/j.cnki.sfyj.2010.03.007
中图分类号:TF803.2
引用信息:
[1]陈亮.从钒浸出液中沉淀结晶型钒酸铁试验研究[J].湿法冶金,2010,29(03):171-175.DOI:10.13355/j.cnki.sfyj.2010.03.007.
基金信息:
攀钢集团攀枝花钢钒公司科技项目资助(08Y0705)
2010-09-15
2010-09-15