Secondary Lead Recycling-Lead-

Secondary Lead Recycling

In worldwide the secondary lead recycling has outweighted lead production from raw ore. Application of lead is centralized on lead acid battery (approx. 80%). The current hot topic of secondary lead industry is how to recycle the spent lead acid battery (SLAB) in the manner of energy conservation, high efficiency and environment protection.

In terms of SLAB recycling, Metalcess provides a complete treating system includes the following steps:

1. Preliminary crushing to remove acid;

2. Secondary crushing, vibrating screen to separate lead paste, hydro-separator to separate PP scrap/heavy plastic scrap/ lead grid;

3. Lead paste (PbSO₄) desulphurization or directly smelting with SO₂ absorption;

4. Desulphurization solution (Na₂SO₄) purification (heavy metal removal), crystallization, waste water recycle;

5. Lead paste(PbCO₃) fire –refining;

6. Lead grid melting/refining/casting;

SLABs are usually from motorcycle, car, truck and etc. The recycling system can treat the batteries with or without AGM plate. The final products are lead and lead alloy ingot/PP scrap/heavy plastic scrap and Na₂SO₄ crystal.

Crushing and Separation System Technical Indicators

Item	Indicators		Item	Indicators
acid recovery	%	＞92	Pb content in PP plastic	%	＜0.1
lead Recovery rate	%	＞98.5	heavy plastic recovery rate	%	≥99
PP recovery rate	%	≥99	Pb content in heavy plastic	%	＜0.1

To be flexible to different projects, recycling system of treatment capacity from 2t/h -20 t/h are available. Metalcess provides full process service covering crushing and separation, lead paste converting and smelting, lead paste solution purification and crystallization, lead grid smelting, refining and casting. The whole process meets the requirement by ISO 14000 and ISO 18000 certification.