摘要
针对湖北某石煤钒矿的矿相分析及传统处理流程,开发了一种磷酸盐辅助浸出的短流程提钒工艺,采用硫酸熟化-磷酸盐辅助浸出-溶剂萃取-氨水沉钒提钒工艺进行了提钒试验。研究了水浸pH、磷铁摩尔比、浸出时间、浸出温度对钒、铁浸出率的影响。结果表明,将粒度小于0.074 mm的原料在200℃和浓硫酸用量0.15 mL/g的条件下熟化2 h得到熟化样品,该熟化样品在水浸pH值2.5、磷铁摩尔比1.5:1、浸出时间1 h、浸出温度70℃的试验条件下,钒的浸出率可达93.44%,铁的浸出率为38.19%。采用P204萃取-硫酸反萃进行2段萃取-反萃,结合氨水沉钒工艺,成功制备出纯度大于99%的粉状五氧化二钒产品。该工艺提高了钒的浸出率,为石煤提钒提供了新的技术路线。
Aiming at the mineral phase analysis and traditional treatment process of a stone-coal vana-dium mine in Hubei,a short-flow vanadium extraction process with phosphate-assisted leaching was de-veloped.The vanadium extraction process using sulfuric acid curing-phosphate-assisted leaching-solvent extraction-vanadium precipitation using ammonia water was carried out for vanadium extrac-tion experiments.The effects of water leaching pH,phosphorus-iron molar ratio,leaching time and tem-perature on the leaching rate of vanadium and iron were investigated,respectively.The results showed that the cured sample was obtained by curing the raw material with particle size less than 0.074 mm at 200 C and the dosage of 0.15 mL/g of concentrated sulfuric acid for 2 h.The cured sample could leach up to 93.44%of vanadium and 38.19%of iron under the experimental conditions of aqueous leaching pH 2.5,phosphorus-iron molar ratio of 1.5:1,leaching time of 1 h,and leaching temperature of 70 C.A powdered vanadium pentoxide product with purity greater than 99%was successfully prepared by us-ing P204 extraction and sulfuric acid stripping for 2-stage extraction and stripping,combined with am-monia vanadium precipitation process.This process improves the leaching rate of vanadium and provides a new technical route for vanadium extraction from stone coal.
作者
朱振洲
吴金朋
高晨龙
王伟
焦树强
ZHU Zhenzhou;WU Jinpeng;GAO Chenong;WANG Wei;JIAO Shuqiang(State Key Laboratory of Advanced Metallurgy,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Dali Energy Storage Technology Hubei Co.,Ltd.,Xiangy-ang 441035,Hubei,China)
出处
《钢铁钒钛》
北大核心
2025年第3期18-24,共7页
Iron Steel Vanadium Titanium
关键词
石煤提钒
除铁
萃取
沉钒
vanadium extraction from stone coal
iron precipitation
extraction
vanadium precipitation
作者简介
朱振洲,2001年出生,男,安徽准南人,硕士,从事钒资源提取回收研究工作,E-mail:15675544684@163.com;通讯作者:王伟,1986年出生,男,教授,主要从事钒钛提取和电化学冶金研究,E-mail:wwang@ustb.edu.cn。
