With the aid of this project several institutions and companies have studied different steps of an hydrometallurgical process for the recycling of Ni-Cd batteries and sludges.
The objective was to develop a novel and economic technology to recover, in a commercial form, metals contained in industrial nickel-cadmium batteries, sludges and liquids.
The use of several innovative techniques such as metal extraction with organic acids, electrolysis of Ni and Cd, and acid recovery through electrodialysis were applied to reduce the ultimate volume of waste being disposed.
This minimisation process is both environmentally and economically advantageous.
The proposed research is directed at developing a novel and economic technology which will allow the recovery in commercial forms of 100% of the heavy metals contained in nickel/cadmium batteries, sludges and liquids. The research work outlined in this proposal will enable a number of novel innovations to be incorporated into an integrated scheme for the recovery of the metals described above. These innovations will be tested individually, and assessed within an existing pilot plant.
The major research tasks are:
1 -Development of a process for the extraction of mixed metals from a solution, using organic acids
2 -Development of a cell for the efficient electrodeposition of nickel
3 -Development of an electrodialysis cell for the production of sulphuric acid from sulphate containing solution
4 -Development of technology for recycling industrial nickel/cadmium batteries.
Demonstration and economic evaluation of the innovations and improvements in the technology will be carried out on an existing pilot plant.
Funding SchemeCSC - Cost-sharing contracts
CH1 6ES Chester