2026 Cheng SO2 reductive leaching of zinc anode slime

This study focuses on the recycling of manganese from zinc anode slime through a novel SO2 reductive leaching process within an integrated copper-zinc hydrometallurgical plant. The objective was to enhance manganese recovery while minimizing environmental impacts. The methodology involved optimizing leaching conditions including SO2 concentration, temperature, and reaction time to achieve maximum manganese extraction. A series of laboratory-scale experiments were conducted to analyze the effectiveness of the proposed process compared to traditional methods. Results indicated that the SO2 reductive leaching method significantly improved the recovery rates of manganese, reaching above 90%. Additionally, the process demonstrated lower sulfur emissions and a reduced carbon footprint compared to conventional techniques. The study concludes that SO2 reductive leaching represents a viable and environmentally friendly approach for manganese recycling in the zinc industry, with potential implications for enhancing resource recovery and sustainability in metal mining operations.