J Mater Sci Technol ›› 2003, Vol. 19 ›› Issue (01): 54-56.

• Research Articles • Previous Articles     Next Articles

Vacuum-Aided Recovery Technology of Spent Ni-Cd Batteries

Jianxin ZHU, Jinhui LI, Yongfeng NIE, Bo YU   

  1. Department of Environmental Engineering, Tsinghua University, Beijing 100084, China...
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-01-28 Published:2009-10-10
  • Contact: Jianxin ZHU

Abstract: Recovery of Ni-Cd batteries was studied by a self-designed vacuum-aided recovering system under laboratory conditions. The fundamental research on a process of disassembling and recovering selected materials from Ni-Cd batteries was conducted. The impacts of temperature, pressure and time were studied respectively. The mechanism of vacuum thermal recovering was also discussed. The results show that: Ni-Cd batteries can be recovered effectively by vacuum-aided recovering system at 573-1173K. At constant pressure, the increase of temperature can improve the separating efficiency of cadmium. When the temperature is 1173K, the cadmium can evaporate completely from the residue during 3h at 10Pa. The reduction of pressure in the certain range is effective to separate cadmium by vacuum distillation. Distillation time is a very important factor affecting separation of cadmium.

Key words: Ni-Cd battery, Vacuum distillation, Resource recovery...