process and plant for the disposal of spent batteries and other waste, toxic due to the presence of heavy metals, by treatment of pyrolysis reduction in baths of molten iron

摘要

The invention relates to a method for disposing of run-down batteries and other, mainly metallic, waste products made toxic by the presence of heavy metals. During an initial stage of the method, run-down batteries and the toxic compounds are introduced into a molten iron bath wherein, under a reducing medium, the metallic compounds are reduced to the metal state, and in this condition, partly dissolved through the molten iron and partly vaporized; the stable metallic compounds under reducing medium are instead absorbed to a slag generated by feeding a suitable scorifier into the molten iron bath.