中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 13 No. 2 April 2003 |
vaccum evaporation from Ni-Cd batteries
NIE Yong-feng(聶永豐）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
