Study on leaching zinc from dust ash of steel plant using sulfuric acid

Taking a dust ash of steel plant from Tangshan as material,leaching zinc from a dust ash of steel plant was conducted using sulfuric acid. The effects of amount of sulfuric acid,temperature,leaching time,and liquid/solid ratio on leaching yield of zinc. The obtained optimum conditions are sulfuric acid45%,room temperature,adding time 0. 5 h,leaching time 2 h,and liquid/solid ratio 2 ∶ 1,the leaching yield is up to 91. 06%.