Study on Removing Cadmium,Zinc and Thallinm in Crude Indium by Vacuum Distillation
In this paper,by improving the process of removing cadminm,the mothed of vacuum distillation method is adopted.Under the conditions of controlling the temperature at around 1 000℃,vacuum distillation time of 4 h,and vacuum degree is less than oregual to 50 Pa,a large amount of chemical reagents can be saved,It is estimated that annual cost savings of RMB 940 000 can be achieved.At the same time,the cadmium content in crude indium can be removed to less than 0.000 5%,which meets the requirements for impurity elements in refined indium production.
NETL
NSTL
万方数据
