| 摘要 |
<p>The invention relates to a hydrometallurgical process for the overall recovery of the components of exhausted lead-acid batteries, in a re-useable form, said components being mainly constituted by such materials as polypropylene, ebanite, PVC; by paste comprising lead sulphatized compounds; and by pure or alloyed metal lead, characterized in that it comprises the following steps: a) battery crushing, b) separation of paste by wet-screening, c) separation of polypropylene by water floating, d) separation of ebanite and PVC from pure or alloyed metal lead, by means of a first hydrodynamic separation, e) separation of ebanite from PVC by a second hydrodynamic separation, f) desulphatization of paste by carbonation by sodium carbonate, with pure sodium sulphate being obtained, g) recovery of so-obtained pure sodium sulphate, h) treatment of carbonated paste in order to recovery from it the lead, in pure metal form, by extraction by electrowinning.</p> |
