碲铜复杂原料中碲回收工艺研究

对碲铜复杂原料中碲贵金属采用了加压浸出工艺处理,研究了游离NaOH浓度、固液比、浸出时间、浸出压力、浸出温度对浸出效果的影响。研究结果表明,游离NaOH浓度为40g.L-1、固液比为1∶7、浸出时间为6h、浸出压力为0.9MPa、浸出温度为120℃时,碲浸出效果最好。贵金属碲以TeO2形态回收,试验结果碲回收率≥95%。

Research on Recovery of Tellurium in Complicated Materials Containing Tellurium and Copper

In this article,we apply autoclave leaching process of treatment for tellurium in complicated materials,and make some studies on the influences which concentration of NaoH,the ratio of solid to liquid,leaching time,leaching pressure and leaching temperature to the effect of leaching.The result shows that the leaching effect is the best with the conditions of Tellurium NaoH concentration of 40g·L-1,the solid to liquid rate of 1:7,leaching time of 6h,leaching pressure of 0.9MPa,leaching temperature of 120℃.If tellurium of precious metals is reclaimed in the shape of TeO2,the recovery rate will be over 95%.