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Sulfuric Acid Leaching of Zinc and Manganese from Spent Zinc-Carbon Battery  

Sohn Hyun-Tae (한밭대학교 재료공학과)
Ahn Jong-Gwan (한국지질자원연구원 자원활용연구부)
Sohn Jeong-Soo (한국지질자원연구원 자원활용연구부)
Park Kyoung-Ho (한국지질자원연구원 자원활용연구부)
Park In-Yong (한밭대학교 재료공학과)
Publication Information
Resources Recycling / v.11, no.4, 2002 , pp. 44-50 More about this Journal
Abstract
Characteristics on the sulfuric acid leaching of zinc and manganese from the spent zinc-carbon battery powders obtained by cushing and magnetic separation, were investigated with the variation of sulfuric acid concentration, reaction temperature, stir-ring speed and solid/liquid ratio. The sample powders were composed of Zn metal, ZnO, $MnO_2$ and $Mn_2$$O_3$. and it was found that the selective leaching of zinc was difficult in this system. At the condition of S/L ratio 1:10, IM H$_2$$SO_4$, $60^{\circ}C$ and 200 rpm, leaching rate of Zn and Mn are 92% and 35% respectively. The concentration of Zn and Mn in the leaching solution are 19.5 g/l, 7.8 g/l and pH of that solution is 0.75. It was confirmed at reducing agent should be added to increase e leaching rate of manganese with sulfuric acid.
Keywords
Zinc-Carbon battery; Mn; sulfuric acid; leaching; Zn;
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