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探索了采用NH4Cl的甘油溶液熔炼除铊来代替传统除铊的方法。研究表明 :NH4Cl的甘油溶液浓度为15 % (质量分数 ) ,熔炼时间为 2 0min ,熔炼温度为 2 2 0℃时 ,可除去精铟中 6 0 %～ 70 %的铊 ,铊含量降低 4 0 μg/g左右。该方法具有纯化效果好、操作简单、能缩短工艺流程、避免了有毒物质的使用的优点。
Explored the use of NH4Cl glycerol solution melting thallium instead of the traditional method of removing thallium. The results show that when the concentration of glycerol in NH4Cl is 15% (mass fraction), the melting time is 20 min and the melting temperature is 220 ℃, the content of thallium in refined indium is 60% ~ 70% and the content of thallium is reduced by 40% μg / g or so. The method has the advantages of good purification effect, simple operation, shortening process flow and avoiding the use of toxic substances.