Abstract：With material containing tellurium and copper as raw material, a study on tellurium recovery by adopting a process composed of leaching with hydrogen peroxide oxidation, copper precipitation with oxalic acid and tellurium reduction is reported. Effects of H2SO4 concentration, hydrogen peroxide concentration, liquid-solid ratio, leaching temperature and time on tellurium leaching rate, excess coefficient of sodium oxalate and reaction temperature on copper precipitation, as well as effects of sodium sulfite dosage on tellurium reduction were all investigated. Results showed that, with H2SO4 concentration at 110 g/L, the dosage of hydrogen peroxide at 1.2 times of theoretical value, liquid-solid ratio of 6∶1, leaching temperature at 80~85 ℃, leaching time of 4 h, the leaching rates of tellurium and copper could be over 99%. With the dosage of sodium oxalate at 1.2 times of theoretical value and reaction temperature at 65~75 ℃, copper precipitation rate reached 99.6%. With the dosage of sodium sulfite at 1.6 times of theoretical value, the reduction rate of tellurium could be up to 99.6%. Tellurium was recovered in the form of powder and copper was recovered as copper oxalate, with corresponding recoveries of 98.5% and 98%.
邬建辉, 刘刚, 王刚, 张文宏, 苏涛, 魏涛. 从复杂碲铜物料中回收碲的工艺研究[J]. 矿冶工程, 2014, 34(4): 104-107.
WU Jian-hui, LIU Gang, WANG Gang, ZHANG Wen-hong, SU Tao, WEI Tao. Technical Research on Recovering Tellurium from Material Containing Tellurium and Copper. Mining and Metallurgical Engineering, 2014, 34(4): 104-107.
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2014, Vol. 34 
