Vacuum-Aided Recovery Technology of Spent Ni-Cd Batteries

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 laso 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 3 h at 10 Pa ,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.

Vacuum-Aided Recovery Technology of Spent Ni-Cd Batteries

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 batterieswas 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 byvacuum-aided recovering system at 573~1173 K. At constant pressure, the increase of temperature can improve theseparating efficiency of cadmium. When the temperature is 1173 K, the cadmium can evaporate completely fromthe residue during 3 h at 10 Pa. The reduction of pressure in the certain range is effective to separate cadmium byvacuum distillation. Distillation time is a very important factor affecting separation of cadmium.