硫酸烧渣综合利用试验研究

Study on Comprehensive Utilization of Sulfuric-acid Slag

为避免硫酸烧渣对环境的污染 ,以硫酸烧渣为原料 ,通过添加活性还原剂 ,用废硫酸直接还原浸出铁并制铁黄 ,而后用以P2 0 4为主体的三元萃取剂萃取回收浸液中的铜 ,用全泥氰化和锌粉置换工艺从浸渣中提取金银 ,较经济有效地回收利用了烧渣中的有价金属 ,铁、铜和金的回收率分别达到了 93.31%、80 .78%和 90 .18%。

In order to prevent sulfuric-acid slag from environmental pollution, the test of comprehensive recovery of valuable elements in the slag has been carried out. Through adding active reducing agent the iron can be directly leached out from sulfuric-acid slag under. Then ferrite yellow can be produced. After that, the copper in leach liquor can be extracted with the ternary extractant mainly containing P204, and the gold and silver in leach residue can be recovered by a process of 'cyanidation-replacement of Zn powders'. The result shows that the process is economically and effectually and the recovery ratio of iron, copper and gold is up to 93.31%, 80.78% and 90.18%.