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采用真空熔炼—真空蒸馏的方法处理焊锡电解阳极泥,在还原真空度20~30 Pa,还原温度为1273 K,还原剂为30%,还原时间1.5 h,蒸馏温度1573 K,蒸馏真空度10-2~0 Pa,蒸馏时间30 min下,得到了纯度为98.13%的粗锡,粗锡中锑、铋、银的含量降低至0.19%,0.85%,0.82%,大部分的锑、铋进入冷凝物中,实现了锡与锑等有价金属一定程度的分离。真空处理后得到的粗锡可返回锡电解系统生产精锡,得到的冷凝物可作为锑冶炼原料进行利用。
The vacuum electrolysis anode slime was treated by vacuum smelting and vacuum distillation at a reduction vacuum of 20-30 Pa, a reduction temperature of 1273 K, a reductant of 30%, a reduction time of 1.5 h, a distillation temperature of 1573 K and a distillation vacuum of 10- The content of antimony, bismuth and silver in the crude tin reduced to 0.19%, 0.85% and 0.82% at the time of 2 ~ 0 Pa and the distillation time was 30 min. The majority of antimony and bismuth reached the condensation Material, to achieve a certain degree of separation of tin and antimony and other valuable metals. The crude tin obtained after vacuum treatment can be returned to the tin electrolysis system to produce refined tin, and the obtained condensate can be used as the raw material for antimony smelting.