锌窑渣中碳铜银铁综合回收试验研究

锌窑渣通常含有大量炭粉和许多有价金属元素。云南某锌窑渣中含碳22.31%、铜1.33%、银294 g/t、铁23.41%等有价元素,具有较高的回收利用价值。针对该锌窑渣的性质,进行了浮选—磁选联合工艺试验研究。其结果表明:该工艺可获得碳品位78.55%、碳回收率92.60%的炭粉,铜品位8.13%、铜回收率78.61%、含银1 890 g/t的铜精矿以及铁品位66.02%、铁回收率76.33%的铁精矿,且均实现了较高的回收率。

Experimental study on comprehensive recycling of carbon,copper,silver,iron from zinc kiln slag

There are usually large amounts of carbon powders and many valuable metal elements in zinc kiln .The zinc kiln slag from Yunnan contains 22.31%carbon,1.33%copper and 294 g/t silver,23.41%iron and other val-uable elements ,which makes it have high recycling value .Based on the property of the zinc kiln slag ,the paper carried out experimental study on a combined flotation -magnetic separation process .The results show that the process can ob-tain carbon powders with carbon grade of 78.55 %,carbon recovery rate of 92.60 %;copper concentrates with cop-per grade of 8.13 %,copper recovery rate of 78.61 % and Ag grade of 1890 g/t; and iron concentrates with iron grade of 66.02 %,iron recovery rate of 76.33 %.A fairly high recovery rate is achieved .