Recovering of zinc from solid waste bearing sphalerite or zinc ferrite by mechano-chemical extraction in alkaline solution

摘要

This study evaluates the efficiency of using mechanical activation for the extraction of zinc from sphalerite and zinc ferrite in lean zinc ores or EAF dusts in alkaline. The mechano-chemical leaching is more effective in comparison with the chemical leaching of non-activated samples. It was found that over 82% of Zn can be extracted from lean zinc ores containing sphalerite with lead compound as additive, and over 45% Zn in EAF dusts can be extracted by mechano-chemical leaching when the leaching process is operated in 5 mol/L NaOH solution at 90°C, and Φ5 mm stainless steel ball as activation medium, the mass ratio of ball to raw materials of 30:1.