钒渣常压直接酸溶浸出实验  

Investigation of Acid Leaching of Vanadium Slag under the Atmospheric Pressure

作　　者：熊雨婷 王玲 刘建欣 贾蓝波 刘淑贤 聂轶苗 Xiong Yuting;Wang Ling;Liu Jianxin;Jia Lanbo;Liu Shuxian;Nie Yimiao(Hebei Province Key Laboratory of Mining Exploitation and Security Technology,College of Mining Engineering,North China University of Science and Technology,Tangshan,Hebei,China)

机构地区：[1]华北理工大学矿业工程学院河北省矿业开发与安全技术重点实验室,河北唐山063210

出　　处：《矿产综合利用》2023年第3期31-37,共7页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金(52004091);河北省自然科学基金(E2019209494);唐山市科技计划项目(19130216g,19130218g)。

摘　　要：这是一篇冶金工程领域的论文。以河北承德某钢厂钒渣为研究对象,针对当前钒渣“钠化焙烧-水浸提钒”生产工艺易产生有毒有害气体且钒回收率低、多种有价金属未能综合回收利用的现状,本文在Fe-VH_(2)O系热力学研究基础上,对钒渣常压下直接硫酸溶解浸出过程中磨矿细度、反应温度、酸浓度、液固比、浸出反应时间及搅拌速度等影响因素进行了实验研究。结果表明,浸出反应温度、硫酸浓度及液固比对钒浸出具有显著影响,在粒度D_(95)约16μm,反应温度90℃、液固比8∶1、H_(2)SO_(4)浓度4 mol/L、浸出反应时间8 h、搅拌速度400 r/min的条件下,钒浸出率为86.33%;酸溶过程中产生的无定形SiO_(2)可能覆盖在未溶解完全的矿物颗粒表面而阻碍矿物的进一步酸溶反应。This is a paper in the field of metallurgical engineering.The vanadium slag of a steel plant in Chengde,Hebei Province was used as the object of study.In view of the production of toxic and harmful gases of the current process of"sodium roasting-vanadium extractionby water leaching"of vanadium slag,low recovery of vanadium and the failure of comprehensive utilization of valuable metals.Based on the thermodynamic study of Fe-V-H2O system,the effects of grinding fineness,reaction temperature,sulfuric acid concentration,liquid-solid ratio,leaching reaction time and stirring speed on vanadium slag leaching were investigated under atmospheric condition.The results show that leaching temperature,sulfuric acid concentration and liquid-solid ratio have significant effects on vanadium slag leaching.Under the conditions of particle size of D_(95)for 16μm,reaction temperature for 90℃,liquid-solid ratio for 8∶1,concentration of H2SO4 for 4 mol/L,leaching time for 8 h and stirring speed for 400 r·min-1,vanadium leaching rate is 86.33%.The amorphous SiO_(2)produced in the process of acid dissolution may cover the surface of incompletely dissolved mineral particles and hinder the further acid dissolution of them.

关 键 词：钒渣 不焙烧 常压酸浸 钒浸出率 冶金工程 

分 类 号：TD951[矿业工程—选矿]