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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 2    April 2003

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Recovery of cadmium by high-temperature 
vaccum evaporation from Ni-Cd batteries 
ZHU Jian-xin(朱建新)1, LI Jin-hui(李金惠)1,
 NIE Yong-feng(聂永丰)1, YU Bo(于 波)2

1. Department of Environmental Science and Engineering,
 Tsinghua University, Beijing 100084, China; 
2. Institute of Nuclear Energy Technology, 
Tsinghua University, Beijing 100084, China

Abstract:High-temperature vaccum evaporation is a recycling technology that includes a selective material recovering process. The fundamental research on a process of disassembling and recovering selected materials from Ni-Cd batteries was conducted using self-designed experimental apparatus. An effective recycling technology based on the evaporation phenomenon of batteries and the elements of cadmium under the laboratory condition was studied. The results show that: (1)Ni/Cd can be effectively recovered by vacuum distillation at appropriate temperature, pressure and time, and high purity cadmium (>99%) can be obtained through the process; (2)the effective distillatory temperature should be at the range of 573-1173K; (3)the higher the evaporation temperature, the lower the purity of cadmium in condensate metal

 

Key words:  vacuum evaporation; recycling; waste battery; Ni-Cd batteries

ISSN 1672-7029
CN 43-1423/U

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