Green Manganese trials deliver high recovery rates alongside zinc extraction
The company said results address two connected challenges for smelters: treating hazardous industrial residues and recovering valuable metals that would otherwise remain in sludge settling ponds or be lost to disposal.
Green Manganese Technologies announced the successful completion of a processing campaign on smelter sludge, achieving high recovery rates of manganese and zinc while significantly reducing toxic contamination. The company's closed-loop, water-based process recovers critical minerals from low-grade ores and industrial tailings that conventional smelting cannot.
The hydrometallurgical process can extract multiple valuable metals from polymetallic nodules in a single integrated process. Independent analysis confirmed a 99.97% reduction of polycyclic aromatic hydrocarbons (PAHs) in the treated solids, addressing hazardous residues from smelters.
Manganese alloy smelters generate substantial sludge each year, creating environmental challenges and disposal costs. Green Manganese's process converts the alkaline sludge into stable, near-neutral solids, enabling engineered backfill applications and reducing environmental liabilities.
The company aims to provide smelters with a practical solution that treats ongoing gas-cleaning streams and historical sludge ponds while recovering valuable metals contained in the sludge.
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