Selective recovery of Sn from copper alloy dross andits heat-treatment for synthesis of SnO2
(1. Department of Materials Science and Engineering, Korea National University of Transportation,
Chungju, Chungbuk 380-702, Korea;
2. Functional Materials Research Team, Advanced Materials & Processing Center,
Institute for Advanced Engineering, Yongin, Gyunggi 449-863, Korea)
Chungju, Chungbuk 380-702, Korea;
2. Functional Materials Research Team, Advanced Materials & Processing Center,
Institute for Advanced Engineering, Yongin, Gyunggi 449-863, Korea)
Abstract: Preliminary study on concentration and separation of tin (Sn) from copper alloy dross by selective dissolution method was conducted. The tin in the copper alloy dross did not dissolve in an aqueous nitric acid solution which could allow separation of tin from the copper alloy dross. The tin as H2SnO3 (metastannic acid) phase was precipitated in the solution with centrifuging process and transformed to tin dioxide (SnO2) after drying process. The dried sample was heat-treated at low temperature and its phase characteristics, surface morphology and chemical composition were investigated.
Key words: recovery of Sn; copper alloy dross; selective dissolution; SnO2