胺萃取耦合CO_(2)矿化分离钒渣钙化焙烧酸浸液中钒锰  

Separation of V and Mn in calcification roasting-acid leachate of V slag by simultaneous amine extraction and CO_(2) mineralization

作　　者：胡可 韩慧果 吴潘[1] 何坚[1] 蒋炜[1] 刘长军[1] 梁斌[1] Hu Ke;Han Huiguo;Wu Pan;He Jian;Jiang Wei;Liu Changjun;Liang Bin(School of Chemical Engineering,Sichuan University,Chengdu 610065,Sichuan,China)

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《钢铁钒钛》2023年第3期9-15,共7页Iron Steel Vanadium Titanium

基　　金：四川省自然科学基金(吸附/结晶耦合制备高纯钒工艺开发,22NSFSC2521)。

摘　　要：钒渣钙化焙烧酸浸液中钒锰浓度高,针对钒锰分离难度大、成本高的问题,提出并研究了胺萃取耦合CO_(2)矿化分离钒锰新工艺。分析了钒锰分离过程的化学基础,研究了酸浸液中各金属元素在有机相、水相和固相中的分配规律,考察了钒锰浓度、胺再生等对钒锰分离效率的影响,并对该工艺的技术经济性进行了初步评估。结果表明,对于高锰浓度酸浸液,钒的萃取率可达99%;胺再生循环使用5次后,钒的萃取率仍保持在97%,锰的沉淀率为96%,该工艺具有较高的技术性和经济性。The efficient separation of vanadium and manganese from an acid leachate of the calcification roasting vanadium slag is quite difficult and costly,particularly for those leachates with high vanadium and manganese concentrations.A novel process was investigated for the separation of vanadium and manganese using trioctylamine and CO_(2).The chemical separation basic of V and Mn was discussed.The distribution law of the major metallic components,particularly V and Mn,of the acid leachate in organic phase,aqueous phase and precipitated phase were quantified.The effects of concentrations of vanadium and manganese,and the recycle of trioctylamine on the separation efficiency were elucidated.The techno-economic feasibility of the new process was discussed.The results show that a vanadium extraction rate of 99% can be achieved even for an acid leachate with high concentration of manganese.The vanadium extraction rate of 97% and manganese precipitation rate of 96% are maintained after 5 regeneration cycles.The new process is techno-economically applausive.

关 键 词：提钒 钒渣 钙化焙烧 酸浸液 萃取 矿化 钒锰分离 二氧化碳 

分 类 号：TF841.3[冶金工程—有色金属冶金]