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目前处理除含碲外尚含有較高硒(0.2%Se以上)的苏打渣时,一般应用如下方法:水浸出、中和、净化及碱性溶液电解得到純碲。从中和废液中順便回收硒。但是,所有按这一流程工作的工厂都未能达到較高的回收率,其主要原因是: (1)苏打渣中可溶于水的以亚碲酸鈉(Na_2TeO_3)状态存在的碲,一般波动在75～90%。其余以难溶于水和NaOH溶液的碲酸鈉(Na_2TeO_4)状态存在,所以只用水或NaOH溶液浸出不足以将碲全部
Currently dealing with the tellurium in addition contains higher selenium (0.2% Se above) of the soda residue, the general application of the following methods: water leaching, neutralization, purification and alkaline solution electrolysis pure tellurium. By the way and the recovery of selenium waste liquid. However, all of the plants operating under this process failed to achieve higher recoveries due to (1) the presence of tellurium in the soda ash (Na2TeO_3) Fluctuation at 75 ~ 90%. The rest is in the state of sodium tellurite (Na 2 TeO 4) hardly soluble in water and NaOH solution, so leaching with water or NaOH solution is not enough to completely tell tellurium