Abstract: Manganese was leached from electrolytic manganese waste residue by adulteration technique.The recovery effects of sulfuric acid leaching method was studied the influence of mineral-residue ratio,solid-liquid ratio,leaching temperature and pH value of solvent on the extraction efficiency of manganese was investigated.The results showed that extraction efficiency of manganese produced by addition of manganese mineral powder into the material was two times higher than that obtained without it.A manganese leaching efficiency of 42.38% was obtained under 3∶1 of mineral-residue ratio and 1∶3 of solid-liquid ratio at pH 2.0 and 60 ℃ for 3 h leaching time.

Key words: manganese waste residue；manganese mineral powder；leaching ratio, electrolytic