摘要
考察氢氧化钠浓度、液固比、温度、浸出时间对文丘里泥中碲、铅、硒浸出率的影响。结果表明,在氢氧化钠浓度100g/L、液固比5、温度60℃、浸出时间1h的优化条件下,碲、铅、硒浸出率分别为94.7%、39.9%、20.5%。采用两级浸出方式可有效抑制铅的浸出,二级浸出液经硫化除铅—酸化沉碲,可以得到TeO2含量大于98.5%的二氧化碲。
Effects of sodium hydroxide concentration,ratio of liquid to solid,leaching temperature,and leaching duration on leaching rates of tellurium,lead,and selenium from Venturi sludge were investigated.The results show that leaching rate of tellurium,lead,and selenium is 94.7%,39.9% and20.5%respectively under the optimum conditions including sodium hydroxide concentration of 100g/L,ratio of liquid to solid of 5,leaching temperature of 60℃,and leaching duration of 1h.Lead extraction is effectively inhibited by two-stage leaching.Tellurium dioxide with TeO2 content of 98.5% above is prepared from secondary leaching lixivium by adding sulfide to remove lead and acidification to precipitate tellurium.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2016年第1期42-45,共4页
Nonferrous Metals（Extractive Metallurgy)
基金
福建省科技计划区域发展项目(2015H4017)
关键词
文丘里泥
碲
提取
Venturi sludge
tellurium
extraction
