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RECYCLING OF METALS FROM SPENT BATTERIES.

Objective

THIS PROJECT WILL STUDY THE POSSIBILITY OF DEVELOPING A PROCESS FOR THE TREATMENT OF COLLECTED SPENT BATTERIES.
A method of reprocessing nickel cadmium batteries based on hydrometallurgical principles has been developed.

The advantage of the hydrometallurgical process is that it is less energy intensive than the thermal process, a greater degree of purity can be obtained in the metals recovered, and the plant need not be so large to become economically viable. The process developed is currently being tested by TNO on a semitechnical continuous scale (approximately 5 kg batteries per hour). On the basis of the results of the semitechnical research, a technical and economic assessment of the process developed was carried out.
THE PROGRAMME IS DIVIDED INTO THREE PHASES:

A) PHASE 1 AIMS TO DEFINE THE PROCESS ROUTE TO BE INVESTIGATED. THE SELECTION IS BASED ON THE RESEARCH CARRIED OUT SO FAR AND ON ADDITIONAL INFORMATION TO BE COLLECTED.

B) AIM OF PHASE 2 IS TO PROVE THE FEASIBILITY AND IF NECESSARY ADAPT THE SELECTED PROCESS ROUTE FOR BATTERY TREATMENT (PRIMARY AS WELL AS NI-CD CELLS) AND TO COLLECT THE PROCESS DATA NEEDED FOR SCALING-UP, INCLUDING:
- A DETAILED DESIGN (INCLUDING COST CALCULATION) ON THE SORTING METHOD OF X-RAY PATTERN RECOGNITION AND SELECTION OF THE HARDWARE FOR IT.
- IDENTIFICATION OF THE MOST SUITABLE TECHNIQUE FOR SHREDDING OF BATTERIES WITH THE PURPOSE OF LIBERATION OF THE CONTENT FOR METAL RECOVERY.
- LABORATORY RESEARCH ON LIBERATION AND RECOVERY OF NICKEL AND CADMIUM FROM NI-CD BATTERIES.
- PILOT PLANT EXPERIMENTS ON THE SHREDDING OF BATTERIES, USING THE TECHNIQUES WHICH HAVE BEEN IDENTIFIED AS THE MOST PROMISING ONES.
- PILOT PLANT EXPERIMENTS ON RECOVERY OF ZINC, MERCURY, NICKEL AND CADMIUM FROM SHREDDED BATTERIES.

C) AIM OF PHASE 3 IS TO MAKE A FIRST ECONOMIC EVALUATION AND TO SET UP A PREDESIGN OF A COMMERCIAL PLANT.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Business Unit of TNO Built Environment and Geosciences
Address
Van Mourik Broekmanweg 6
2628 XE Delft
Netherlands

Participants (2)

LETO RECYCLING BV
Netherlands
Address

Wierden
TECHNICAL UNIVERSITY TWENTE
Netherlands
Address

Enschede