Lead should be handled with very great care to avoid
the health risk of lead poisoning. Small scale lead acid battery recycling
exposes people involved in the business to this hazard. Considerable research
has been carried out to reduce the amount of lead one is exposed to at that
small scale battery recycling level.
Dr R Vasant Kumar, University Senior Lecturer in
Materials Science and Metallurgy at Trinity Hall, Cambridge developed a low
cost process that uses only eight percent (8%) of energy required when compared
to using conventional method and produces fewer toxic sulphur dioxide gas and
lead dust. (N:B Protective wears should be worn when handling exposed
batteries).
Using Dr R Vasant’s method, the paste from spent lead
acid batteries is melted and mixed with citric acid producing crystallites that
are heated to about 350°C, yielding lead and lead oxide for use in the
manufacture of new lead battery paste.
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