Used batteries and other material for reclamation and recovery or environmentally safe disposal are transferred from a feed bin by an auger into a crusher and then into a pyrolysis chamber. The feed system excludes air or oxygen from passing through the auger and crusher into the pyrolysis chamber. The...http://www.google.fr/patents/US5632863?utm_source=gb-gplus-shareBrevet US5632863 - Battery pyrolysis process
