investigation of Affecting Factors in the Recovery of Acidic Leaching in Sphaleite Lead and zinc ores Aligodarz Gol-zard Mine-Lorestan Province

Roasting methods due to environmental problems in the production of sulfur dioxide gas have led to further research on hydrometallurgy. In this research, the effect of effective acid leaching in the presence of oxidizing agents on sphalerite in the Aligudarz gol -zard mine was investigated. The purpose of this study is to recover acidic solution of zinc from sulfide raw ores using sulfuric acid and hydrochloric acid and the use of oxidants. In order to achieve the best operating conditions for further recovery, the parameters affecting the acid leaching process in the presence of oxides of hydrogen peroxide and potassium permanganate were investigated. Leaching in terms of acid concentration (0.5-3.5) molar, oxidizing materials concentration (0.01-0.05) volumetric, temperature (30-80°C), solid to liquid ratio (0.01-0.05) and stirring speed (300-800 rpm). During this process, the elemental produced sulfur was filtered, and also the zinc hydroxide was saparated by the addition of sodium hydroxide in the precipitation step by filtration. After the end of the research, sulfuric acid was observed with 3 molar concentration and 0.05 oxidation of hydrogen peroxide at 50 ° C and solids to liquid 0.01 and 700 rpm respectively. The optimum recovery of zinc solution was achieved in the optimum conditions and that the sulfuric acid oxidizing hydrogen peroxide was more efficient than hydrochloric acid and oxidizing potassium permanganate.