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8337622 
Journal Article 
Recovery of zinc from spent Zn/Mn02 batteries through hydrometallurgical treatment 
Kunický, Z; Jandová, J; Formánek, J 
2012 
65 
4 
234-238 
English 
Kovohutě Příbram has developed a technology of portable zinc carbon and alkaline batteries treatment which consists of batteries crushing, sorting components and their utilization and in co-operation with the Department of Metals and Corrosion Engineering, VŠCHT Praha, a hydromet-allurgical method to utilize spent electrode material, so called active mass, which is the key factor to fill new goals for recycling efficiency set by Directive 2006/66/EU. This paper describes the developed method of spent Zn/Mn02 batteries treatment. After the dismantling of the batteries the active mass was analyzed and found to contain 28 % Zn and 22 % Mn. Batch laboratory experiments were carried out to establish an acid leaching procedure aiming at achieving maximum zinc extraction under simultaneous possible depressing manganese extraction. Leaching of active mass was performed in sulfuric acid originating from spent lead acid batteries. Leach liquors obtained were purified by alkalization and cementation. Zinc was recovered from refined liquors as zinc carbonate precipitate usable for zinc production or other purposes. 
Carbonate precipitation; Leaching; Sulphuric acid