Lead batteries are the most highly recycled consumer products worldwide. All the components of lead batteries are recycleable. Lead battery breaking and separation is the first step of a complete recycling process.
STC supplies complete plants for exhausted lead battery breaking and separation.
The lead battery breaking and separation plant makes it possible to recover battery paste, metallic lead, polyproylene and polyethylene.
Description of the lead battery breaking and separation process:
- The exhausted batteries, collected in bulk, are discharged into a basin by the trucks which deliver the batteries to the lead battery breaking and separation plant. A crane takes the batteries from the basin and loads them onto a feeder trough. The feeder trough, controlled by a PLC, automatically feeds a first Hammer crusher that crushes the batteries coarsely and allows the coming out of the electrolyte. In this way it is possible to obtain a first separation of the acid from the other components of the battery.
- From the first breaker the battery parts are sent to a Hammer mill that reduces them in very small fragments.
- The milled substance passes through Sieves where, adding process water, the battery paste and the residual electrolyte are removed.
- The plastic and lead fragments which remain in the sieve’s grid are sent to a hydrodynamic system, Sink & Float, where the plastics are separated from the metal.
- The obtained plastic is sent to a second sieve for further washing an removal of residual paste.
- The metallic lead which remains at the bottom of the Sink & Float is extracted through a screw conveyor and then sent to fusion.
- The plastics coming from the second sieve are sent to a gravimetric separator where the light plastics (polypropylene) are separated from the heavy ones (polyethylene). The polyethylene coming from the bottom is sent to another mill in order to be finely grinded, dried and separated from lead residuals through a concentrating table.
- The polypropylene is further milled, washed with clean water and dried and can then be sold as prime material for new batteries.
STC supplies all the necessary equipment for the lead battery breaking and separation process.