亚熔盐法高铬钒渣钒铬高效同步提取工艺研究  

Research on Simultaneous Extraction of Vanadium and Chromium from High Chromium Vanadium Slag by Sub-molten Salt Method

作　　者：潘自维 郑诗礼[2] 王中行[2] 王少娜[2] 杜浩[2] 张懿[2] 谢华[1] 

机构地区：[1]中国矿业大学(北京),北京100083 [2]中国科学院过程工程研究所,北京100190

出　　处：《钢铁钒钛》2014年第2期1-8,共8页Iron Steel Vanadium Titanium

基　　金：国家重点基础研究发展计划高铬钒渣亚熔盐法钒铬高效提取分离与污染控制(2013CB632605);国家自然科学基金项目钒渣亚熔盐法钒铬高效提取分离应用基础研究(51274179);国家自然科学基金重大项目钒钛资源冶金过程有价组元强化迁移规律及分离理论(51090382)

摘　　要：根据高铬型钒渣物相特征,采用NaOH亚熔盐液相氧化法提取高铬钒渣中的钒铬,实现钒铬的高效低成本低温同步提取。系统考察NaOH亚熔盐体系反应温度、碱矿质量比、搅拌转速等工艺参数对钒渣分解过程的影响,获得最优工艺参数为:温度220℃,NaOH浓度85%,碱矿比10∶1,搅拌转速950 r/min,常压通氧气流量1 L/min,反应时间6 h;钒、铬的浸出率分别达到95%和90%以上,实现了高铬钒渣中钒铬共提,为高铬型钒渣中钒铬的同步提取提供了一条可行途径,实现了钒渣的综合利用。In order to realize efficient and low-cost low-temperature simultaneous extraction of vanadium and chromium from high chromium vanadium slag, NaOH sub-molten salt liquid phase oxidation was employed according to phase of the slag. After the influences of reaction temperature of NaOH sub-molten salt system, NaOH-to-ore mass ratio and speed of stirring on vanadium extraction were studied, the optimum process parameters were obtained. With the reaction temperature of 220 ℃, NaOH concentration of 85%, NaOH-to-ore mass ratio of 10： 1, stirring speed of 950 r/min, atmospheric oxygen flow of 1 L/min and reaction time of 6 h, the leaching rates of vanadium and chromium reached 95% and 90% or above respectively, which indicates ＇the realization of comprehensive utilization of vanadium slag.

关 键 词：高铬钒渣 亚熔盐 液相氧化 钒铬共提 

分 类 号：TF841.3[冶金工程—有色金属冶金]