高硅质石煤钒矿浸出机理研究  

Study on Vanadium Leaching Mechanism from High Siliceous Stone Coal Vanadium Ore

作　　者：尹飞[1,2] 邹维[2] 揭晓武[2] 张永禄[2] 王振文[2] 

机构地区：[1]北京科技大学,北京100083 [2]北京矿冶研究总院,北京100160

出　　处：《有色金属（冶炼部分）》2016年第9期21-23,27,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家科技支撑计划项目(2012BAB07B01)

摘　　要：对高硅质石煤钒矿进行工艺矿物学分析和在硫酸体系下浸出机理的研究。结果表明,钒钛矿及含钒金红石、硫钒铜矿在硫酸直接浸出以及添加氟化物条件下,钒均难以浸出;钒酸盐、褐铁矿在硫酸体系下,钒易于浸出,氢离子破坏其晶体结构;含钒云母类矿物采用硫酸直接浸出,钒浸出率低于50%,在添加氟化物条件下,钒浸出率高于90%。氟化物强化含钒云母类矿物的浸出机理是HF与F-形成络合离子,在H_3O^+的促进下,破坏硅酸盐矿物晶体结构中的Si-O键,实现钒的浸出,HF在浸出过程起催化作用。Process mineralogy and leaching mechanism in sulfuric acid system of high siliceous stone coal vanadium ore were investigated. The results show that vanadium is difficult to be leached from schreyerite, vanadium-bearing futile, and sulvanite by sulfuric acid with/without fluoride addition, while vanadium is easy to be leached from vanadate and vanadium limonite by sulfuric acid through destruction of its crystal structure by hydrogen ion. Vanadium leaching rate in sulfuric acid system with/without fluoride addition is 50% below and 90% above respectively. The intensified leaching mechanism of fluoride is to destroy Si-O bond in crystal structure of silicate minerals by complex ion formed from HF and F- under promotion of H3O＋. HF serves as catalyzer in leaching process.

关 键 词：高硅石煤钒矿 硫酸浸出 氟化物 浸出机理 

分 类 号：TF841.3[冶金工程—有色金属冶金]