Reductive leaching of manganese from manganese anode slag

Orange peel was used as reductant for reductive leaching of manganese anode slag,which was featured by intractable treatment and lead-rich,and sulfuric acid was used as leaching solvent.By using manganese anode slag from electrolytic manganese plant as raw materials,the effects of dosage of orange peel and sulfuric acid,leaching time and temperature on the leaching ratio were studied.The results show that the leaching recovery of Mn reaches 96%,while the leaching recovery of Pb is only 0.2% under the conditions of leaching temperature 80 ℃,leaching time 2h,the ratio of solid to liquid 1:4,the mass ratio of orange peel to slag 1:5 and the mass ratio of acid to material 1.2:1.The experiment proves that extracting manganese from anode slag in sulfuric acid using the orange peel as reductant is highly effective.