湿法炼锌净化渣二次利用技术研究及应用

Secondary Utilization Technical Research and Application of Zinc Hydro-metallurgy Purified Residues

针对湿法炼锌三段净化工艺存在锌粉用量大、成本高等问题,采用净化二、三段渣代替锌粉用于净化除杂,用于提高净化渣中金属锌利用率并优化镉回收钴渣走向,结果表明:净化渣用于镉回收时,Ge、Co、Cu、Cd脱除率分别达到83.82%、94.09%、95.55%、96.77%;钴渣零产量、系统锌湿法直收率提升0.5%~1.4%;海绵镉锌粉单耗由3.54 t/t·Cd降至0.88 t/t·Cd。

The zinc hydro-metallurgy three-stage purification process has the following problems that large dosage of zinc powder,high costs,and so on,the purification of two-stage and three-stage residues is used instead of zinc powder for purification,to increase the utilization rate of the metal zinc in purification residues and optimize the cobalt slag trend from cadmium recycling,results show that:when purification residues were used for cadmium recycling,the removal rate of Ge,Co,Cu,Cd separately is 83.82%,94.09%,95.55%,96.77%,cobalt residues'yield is zero,the wet direct recovery rate of systematic zinc increased by 0.5%~1.4%;the unit consumption of sponge cadmium zinc powder decreased from 3.54 t/t·Cd to 0.88 t/t·Cd.