常压硫化−真空气化法绿色高效分离锡精炼硫渣中的锡和铜

Green and efficient separation of tin and copper from sulfur slag of tin refining by atmospheric sulfuration-vacuum gasification

硫渣是锡精炼加硫除铜过程中产生的一种高附加值危险废弃物,其主要成分为锡(60%~70%)、铜(15%~25%)和硫(10%~15%),具有较高的经济价值。为将硫渣中锡与铜高效分离,本研究向硫渣中加硫后在高温真空蒸馏炉中对其进行常压硫化−真空气化处理。结果表明,挥发物为硫化亚锡,其中锡和铜的含量分别为74.95%和0.46%;残留物为硫化亚铜,其中锡和铜的含量为0.26%和76.41%。锡的直收率为99.96%,铜的直收率为99.08%,锡与铜的分离率为99.90%。常压硫化−真空气化法为锡精炼硫渣的清洁高效处理提供了新方法,为锡铜合金的分离提供了新思路。

Sulfur slag is a kind of high value-added hazardous waste produced in the process of adding sulfur to remove copper in tin refining.Its main components are tin(60%−70%),copper(15%−25%)and sulfur(10%−15%),which has high economic value.In order to separate tin and copper from sulfur slag efficiently,the sulfur slag was sulfurized under atmospheric sulfuration and vacuum gasification in a high temperature vacuum distillation furnace.The volatile is stannous sulfide,in which the contents of tin and copper are 74.95%and 0.46%,respectively.The residue is cuprous sulfide,in which the contents of tin and copper are 0.26%and 76.41%,respectively.The direct yields of tin and copper are 99.96%and 99.08%,respectively.The separation rate of tin and copper is 99.90%.The atmospheric sulfuration-vacuum gasification method provides a new method for the clean and efficient treatment of tin refining sulfur slag,and provides a new idea for the separation of tin copper alloy.