含钒尾渣NaOH亚熔盐浸出提钒  

Leaching of Vanadium from Vanadium-containing Residue by NaOH Sub-molten Salt

作　　者：李兰杰[1,2,3] 陈东辉 白瑞国 郑诗礼[2] 杜浩[2] 王少娜[2] 张懿[2] 

机构地区：[1]承德钢铁集团钒钛工程技术研究中心,河北承德067102 [2]中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京100190 [3]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《过程工程学报》2011年第5期747-754,共8页The Chinese Journal of Process Engineering

基　　金：国家高技术研究发展计划(863)基金资助项目(编号:2009AA064003);国家自然科学基金重大项目资助(编号:51090382)

摘　　要：研究了含钒尾渣NaOH亚熔盐法分解过程中主要反应因素对钒浸出率的影响规律,获得了最佳工艺参数,并对反应机理进行了探讨.结果表明,反应温度、反应时间及碱渣质量比是最重要的反应因素,其影响程度为反应温度(T)>反应时间(t)>碱渣质量比(r);含钒尾渣最佳浸出条件为:反应温度170℃,尾渣粒度-74μm,反应时间3h,碱渣质量比4:1及搅拌速度700r/min.在此条件下,钒浸出率高于90%.含钒尾渣亚熔盐浸出钒过程前期为化学反应控制,反应活化能为27.69kJ/mol,NaOH亚熔盐介质通过破坏含硅玻璃体包裹相(辉石相)实现含钒尾渣中钒的高效浸出.The major reaction factors of vanadium leaching process from vanadium-containing residue using NaOH sub-molten salt were studied,and the optimum process parameters obtained.By analyzing the decomposition process of vanadium-containing residue,the reaction mechanism was obtained at the same time.The significance of reaction temperature,particle size,reaction time,and NaOH-to-residue mass ratio on vanadium extraction was studied.The orthogonal experimental results showed that the impact order of reaction factors was reaction temperature reaction time NaOH-to-residue mass ratio with respect to vanadium recovery.Under the conditions of reaction temperature 170℃,NaOH-to-residue 4：1,stirring speed 700 r/min,particle size-74 μm and reaction time 3 h,leaching rate of vanadium was higher than 90%.The leaching process of vanadium,with activation energy 27.69 kJ/mol,was controlled by the chemical reaction in the initial reaction process.Acmite was decomposed,and dissoluble vanadium dissolved into NaOH solution,when the residue was decomposed by NaOH sub-molten salt.

关 键 词：含钒尾渣 亚熔盐 钒回收 机理 

分 类 号：TF841.3[冶金工程—有色金属冶金]