攀钢密地选矿厂总尾矿深度回收方案的探讨

针对福建某氰化尾渣,采用浮选、焙烧、浸出、磁选进行金、铁以及硫的回收利用。试验先进行黄铁矿的浮选,得到硫品位38.63%,回收率86.97%硫精矿,其中含金5.26g/t,金回收率为74.59%。然后硫精矿进行焙烧制硫酸,硫总体回收率为85.80%,烧渣进行还原焙烧后进行浸金,金浸出率为95.49%,浸出后进行弱磁磁选,得到品位为61.56%的铁精矿,铁总体回收率为73.15%。有效的回收利用了氰化尾渣中的有价元素。

Discuss of the Deep Recovery Scheme of the Tailings in Midi concentrator of Panzhihua Iron and Steel Corporation

recycling the gold, iron, and sulfur by using the method of floating, roasting, leaching, and magnetic separation for the certain cyanide tailings in Fujian Province. First step of the experiment is the floating of the pyritic with recovery of the sulfur with grade of38.62%, sulfur concentrate with recovery rate of 86.97% which contains gold 5.26g/t, and gold with recovery rate of 74.59%. The following step is the roasting of the sulfur concentrate with a general recovery rate of 85.80% for sulfur, then leach the gold after the revert of the cinder. The gold leaching rate is 95.49%. After that we made the weak magnetic separation, and get a 61.56%-grade iron concentrate with a general iron recovery rate of73.15%. Through all the steps, we effectively recycled the valuable elements in the cyanide tailings.