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Recovery Of Valuable Metals In Tin-Based Anodic Slimes By Carbothermic Reaction

Han C., Kim Y.-M., Son S. H., Choi H., Kim T. B., Kim Y. H.

Archives of Metallurgy and Materials

2015

Vol. 60, iss. 2B

1213--1216

This study investigated the recovery of anodic slimes by carbothermic reaction in the temperature range of 973~1,273K and amount of carbon as a function of time. Tin anodic slime samples were collected from the bottom of the electrolytic cells during the electro-refining of tin. The anodic slimes are consisted of high concentrated tin, silver, copper and lead oxides. The kinetics of reduction were determined by means of the weight-loss measurement technique. In order to understand in detail of carbothermic reaction, thermodynamic calculation was carried out and compared with experiments. From thermodynamic calculation and experiment, it was confirmed that Sn-based anodic slime could be reduced by controlling temperature and amount of carbon. However, any tendency between the reduction temperature and carbon content for the reduction reaction was not observed.