从硫酸溶液中还原制取金属碲粉  

Preparation of powdered-tellurium by reduction from sulfuric acid solution

作　　者：马玉天[1] 龚竹青[1] 陈文汨[1] 李宏煦[2] 阳征会[1] 黄坚[1] 

机构地区：[1]中南大学冶金科学与工程学院 [2]北京科技大学冶金生态学院,北京100083

出　　处：《中国有色金属学报》2006年第1期189-194,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50204001)

摘　　要：采用SO2作还原剂从含碲的硫酸溶液中制取碲粉,并确定了SO2从硫酸溶液中还原碲的最佳条件:反应温度80℃,NaCl浓度1.2 mol/L,SO2流量0.1 m3/h,反应时间40 min,碲的还原率达到99.63%。还原所得粗碲粉经亚硫酸钠脱硒,盐酸酸洗除杂处理,硒、砷、锡、铜的脱出率分别达到99%、93%、80%、87.5%,得到含碲99.669%的金属碲粉。XRD和SEM表征表明还原碲粉的形态为针状晶体。The powders of Te were prapared from sulfuric acid solution hearing Te with SO2 as the reducing agent. The experiments show the optimum process parameters are as follows： reaction temperature 80 22, NaCl concentration 1.2 tool/L, SO2 flow rate 0. 1 m^3/h, reaction time 40 rain. Under the optimum condition, 99.63% Te is reduced. After the treatment with NaSO3 and hydrochloric acid, 99% Se, 93% As, 80% Sn and 87.5% Cu are removed from the raw powdered-tellurium, and the powders of 99. 669% Te are prepared. The results of XRD and SEM indicate that the powdered-tellurium is crystalline with needle form.

关 键 词：碲粉 二氧化硫 还原 

分 类 号：TF111.132[冶金工程—冶金物理化学]