熔融态高钙高磷钒渣氧化钠化—水浸提钒  

Vanadium extraction from molten vanadium slag with high contents of Ca and P by direct oxidation and adding Na_2CO_3 and water leaching method

作　　者：李宏[1,2] 王艳南[1,2] 宋文臣[1,2] 

机构地区：[1]北京科技大学钢铁与冶金新技术国家重点实验室,北京100083 [2]北京科技大学冶金与生态工程学院,北京100083

出　　处：《重庆大学学报（自然科学版）》2015年第2期138-142,共5页Journal of Chongqing University

基　　金：国家重点实验室资助项目(41603004)~~

摘　　要：采用XRD对钠化高钙高磷钒渣(11.48%V2O3、13.71%Ca O、0.78%P2O5)熟料的物相组成进行了分析,并研究了钒渣熟料提钒的最佳实验参数。结果表明:在Na2CO3加入量相对较少时(35%),V存在于Na4V2O7、Na3VO4、Na1.33V2O5和Na Ca VO4中,随着Na2CO3加入量的增加,Na4V2O7和Na Ca VO4会进一步与Na2CO3反应转化为Na3VO4;钒渣熟料中P存在于水溶性Na3PO4中;当实验条件如下:Na2CO3加入量为40%,液固比为5∶1 m L/g,浸出温度为90℃,浸出时间为4min,搅拌速度为150 r/min,高钙高磷钒渣熟料浸出率可超过90%。可见,熔融态高钙高磷钒渣氧化钠化水浸提钒的方法可行。The mineral phases of the clinker obtaining after oxidizing vanadium s｜ag with high contents of Ca and P are analyzed by X-ray diffraction （XRD）, and the experimental parameters of vanadium extraction are also investigated in this paper. The results show that V exists in the form of Na4 V2 07, Na3 VO4, Na1.33 V2O5 and NaCaVO4 when the amount of added Na2CO3 is relatively small （35%）. But, with the added Na2CO3 amount increasing, Na4V207 and NaCaVO4 react with NazCO3, then change into Na3VO4. P in the clinker exists in the form of Na3PO4. The leaching rate of vanadium can reach above 90% under the conditions： added Na2CO3 amount of 40%, liquid to solid ratio of 5： 1 mL/g, leaching temperature of 90℃, leaching time of 4 min, stirring rate of 150 r/min. Therefore, the method of extracting vanadium from molten vanadium slag with high contents of Ca and P by direct oxidation and adding Na2O3 and water leaching is feasible.

关 键 词：熔融高钙高磷钒渣 氧化 碳酸钠 物相 浸出 提钒 

分 类 号：TF841.3[冶金工程—有色金属冶金]