钢铁钒钛2025，Vol.46Issue(6)：47-56,10.DOI:10.7513/j.issn.1004-7638.2025.06.005
转型法制备高纯偏钒酸铵过程杂质协同控制研究
Collaborative control of impurities in preparation of high-purity ammonium metavanadate by transition method
摘要
Abstract
In response to the issues of lengthy process and high cost associated with traditional ammoni-um metavanadate preparation methods,this study proposes an innovative approach based on the pH-de-pendent speciation transformation characteristics of vanadate ions.By precisely controlling the pH of the medium,direct conversion of decavanadate(V10O286-)to metavanadate(VO3-)was achieved.During this process,impurity elements(Na,K,Cr,As)were effectively removed through their transformation into ionic forms(Na+,K+,CrO42-,HAsO42-)in the solution phase,enabling simultaneous impurity con-trol in ammonium metavanadate preparation.The effects of transformation temperature,pH,and liquid-to-solid ratio on vanadium recovery and product purity were systematically investigated.Experimental results demonstrated that complete conversion of V10O286-to VO3-could be achieved at pH monstrated that complete conversiwere found to favor the crystallization of ammonium metavanadate,thereby en-hancing vanadium recovery.While increasing the liquid-to-solid ratio improved conversion efficiency,excessive ratios led to reduced vanadium recovery and resource wastage.Through optimization experi-ments,the optimal process parameters were set:reaction temperature of 30 ℃,pH of 8.5,and liquid-to-solid ratio of 7-10.Under these conditions,industrial-grade ammonium decavanadate with 98％purity was directly converted to crystallized ammonium metavanadate,yielding a product with 99.75％purity and achieving a vanadium recovery rate of 90.67％.This method successfully realized one-step prepara-tion of ammonium metavanadate with purity of 99.5％.This method significantly simplifies the tradi-tional process flow and provides a new technical approach for the efficient preparation of high-purity ammonium metavanadate.关键词
多钒酸铵/偏钒酸铵/pH值/选择性/纯化Key words
ammonium polyvanadate/ammonium metavanadate/pH value/selectivity/purification分类
矿业与冶金引用本文复制引用
贾美丽,王宝华,杜浩,胡飞飞,刘金玉,祁健,赵备备..转型法制备高纯偏钒酸铵过程杂质协同控制研究[J].钢铁钒钛,2025,46(6):47-56,10.基金项目
河北省省级科技计划资助项目(23311501D) （23311501D）
河钢集团重点科技项目(HG2023220). （HG2023220）
