Eco-friendly technology of metal recovery from metallurgical dust

Metallurgical dust generated from ferrous and non-ferrous metal production processes represents a significant source of hazardous waste containing valuable metals including zinc, iron, lead, and copper. This study provides a comprehensive analysis of current technologies for metal recovery from metallurgical dust based on Scopus-indexed research publications. The investigation examined pyrometallurgical, hydrometallurgical, and hybrid processing approaches, evaluating their efficiency, environmental impact, and scalability. Results demonstrate that zinc ferrite (ZnFe₂O₄) remains the primary challenge in metal extraction, with reduction temperatures starting at 581.55°C for this compound. Pyrometallurgical methods including rotary kiln and rotary hearth furnace (RHF) processes achieved metallization rates of 87.1-97.44% and dezincification rates of 92.5-95.67%, while hydrometallurgical approaches using organic acids and ammonia-based solutions achieved zinc recovery rates of 76-96%. Hybrid pyro-hydrometallurgical processes demonstrated superior comprehensive metal recovery (>95%) but require optimization of energy consumption and chemical usage. This research emphasizes the importance of selecting process parameters based on dust composition and environmental constraints to maximize resource utilization while minimizing secondary waste generation.

Hali tarjima qilinmagan