冶炼厂水处理污泥提铜除砷研究

Research of copper extracting and arsenics removing from water treatment in a smeltery

以冶炼厂水处理污泥为原料，对其进行除砷提铜研究，探索了采用硫酸熟化-催化氧化从污泥中提取铜的工艺条件，当污泥中硫酸量为1t／t，氧化剂（CH80）量为0．01t／t，在液固比为4：1，常温条件下，以250r／min搅拌3h，铜的提取率为94％，调节浸出液pH为3．7～4．0后，利用固砷剂除砷同砷，砷去除率为98．54％，此时铜的损失为1．34％，除砷后的浸出液制成硫酸铜产品，铜的总收率在85％以上。

The water treatment sludge of smelter mill were used as materials to study the refinement of copper and the removal of arsenic. The exploration has adopted the acid-catalyzed oxidation craft to refine copper from the sludge. When the amount of sulfuric acid 1 t/t, the antionxidant（CH80）capacity of 0.01 t/t and liquid-solid ratio at 4：1, the copper lixiviated efficiency is 94% with 250 r/min and stiring from 3 h at the nomal temperature. The copper lixiviated efficiency is 94%. Adjust the lixiviated liquid at pH 3.7～4.0, then utilized the fixation of arsenic to remove and fix arsenic. Arsenic removal efficiency is 98.54 % when the efficiency of the loss of copper is 1.34 %. The lixiviated liquid after the removal of arsenic has been made to CuS04 products. Copper reclaimed efficiency more than is 85%.