废杂铜冶炼渣两段浸出铜锌试验研究

废杂铜冶炼渣经过物理分选出其中部分金属态铜、锌和铁后,依然含有一定量铜、锌、铁和硅的化合物,采用两段湿法浸出处理物理分选后的废杂铜冶炼渣,通过控制浸出初始酸度、浸出时间等措施,Cu、Zn综合浸出率分别达到92.26%和94.83%,第一段浸出液中Fe浓度仅为2.28 mg/L。Cu、Zn与Fe的分离效果好,为后续铜、锌的进一步回收奠定了良好的基础。

Experamental research on two-stage leaching of copper and zinc from smelting slag of scrap copper

After recovering parts of coarse copper,zinc and iron from smelting slag of scrap copper by physical separation method,the slag still contains a certain amount of copper,zinc,iron and silicon compound.To deal with the smelting slag treated by physical separation method,the two-stage leaching process was adopted.The result showed that the comprehensive leaching rates of copper and zinc were 92.26%and 94.83%,respectively, and the concentration of iron during the first leaching stage was only 2.28 mg/L by controlling initial acidity, leaching time and other factors.The copper and zinc could be effectively separated from iron,which laid a good foundation for further recovery of copper and zinc.