All the components of the modern lead battery are recyclable and from an Industry perspective lead battery recycling process is an environmental success story because a very high percentage of spent lead batteries is recycled.
During lead battery recycling process batteries are usually crushed into small pieces and the plastic is separated. The recovered and purified lead and the recovered plastic can be delivered to battery manufacturers and other industries.
The lead battery recycling process can be divided into three major steps:
- Lead battery breaking and separation
- Metal Lead reduction
- Lead refining
The lead battery breaking and separation plant permits to recover battery paste, metallic lead, polypropylene and polyethylene. The metallic lead can be directly sent for fusion. In modern plants the battery paste undergoes desulphurization and is then sent to the furnaces. The polypropylene, after opportune treatment, can be extruded in pellets and reused in the production of new batteries. The polyethylene of the lead battery separators is not suitable for recycling. STC has ideated an innovative technology that permits to transform polyethylene from lead batteries in gas that can be burned in furnaces.
The lead reduction in furnace permits to convert battery paste in raw metallic lead.
The pyrometallurgical lead refining process is also known as “Softening of Lead” because the metal is rendered soft after the removal of impurities which are present in the raw lead.
Beyond all traditional lead battery recycling processes STC offers innovative money saving and environment friendly processes, as electrolyte recovery, hydrometallurgical conversion of lead paste in lead oxide, ultrapure lead oxide production and ultrapure lead oxide reduction at low temperatures for use in new battery production.