A Review of Research Progress of Key Technologies of Spent Nickel-Cadmium Batteries Disposal and Metal Recovery

The current status of key technologies of disposing spent nickel-cadmium batteries was introduced, involving pretreatment, distillation, extraction, hydrometallurgical separation as well as treatment of wastewater, waste gas and solid waste. The research results of bio-metallurgy, vacuum metallurgy and emulsion liquid membrane separation were also introduced systematically. The impacts of different processes on the environment were compared.