论文信息 - Recovery of zinc and manganese from alkaline and zinc-carbon spent batteries

Recovery of zinc and manganese from alkaline and zinc-carbon spent batteries

Abstract This paper concerns the recovery of zinc and manganese from alkaline and zinc-carbon spent batteries. The metals were dissolved by a reductive-acid leaching with sulphuric acid in the presence of oxalic acid as reductant. Leaching tests were realised according to a full factorial design, then simple regression equations for Mn, Zn and Fe extraction were determined from the experimental data as a function of pulp density, sulphuric acid concentration, temperature and oxalic acid concentration. The main effects and interactions were investigated by the analysis of variance (ANOVA). This analysis evidenced the best operating conditions of the reductive acid leaching: 70% of manganese and 100% of zinc were extracted after 5 h, at 80 °C with 20% of pulp density, 1.8 M sulphuric acid concentration and 59.4 g L −1 of oxalic acid. Both manganese and zinc extraction yields higher than 96% were obtained by using two sequential leaching steps.

[1] R. Sahoo,et al. Leaching of manganese from low-grade manganese ore using oxalic acid as reductant in sulphuric acid solution , 2001 .

[2] Jorge Alberto Soares Tenório,et al. Characterization of used alkaline batteries powder and analysis of zinc recovery by acid leaching , 2001 .

[3] Denise Crocce Romano Espinosa,et al. An overview on the current processes for the recycling of batteries , 2004 .

[4] A. L. Salgado,et al. Recovery of zinc and manganese from spent alkaline batteries by liquid–liquid extraction with Cyanex 272 , 2003 .

[5] Joaquin F. Perez-Benito,et al. A Kinetic Study of the Reduction of Colloidal Manganese Dioxide by Oxalic Acid , 1996 .

[6] Denise Crocce Romano Espinosa,et al. Recycling of batteries: a review of current processes and technologies , 2004 .

[7] M. B. Mansur,et al. Development of a hydrometallurgical route for the recovery of zinc and manganese from spent alkaline batteries , 2005 .

[8] Thomas C. Melvin,et al. European Patent Office , 2002 .

[9] J. Tenório,et al. Simultaneous recovery of zinc and manganese dioxide from household alkaline batteries through hydrometallurgical processing , 2004 .