Sustainable Mining and Metallurgy

The acidic solution of high-aluminum zinc sulfate produced in the process of zinc hydrometallurgy was chosen as the research object, and ammonium sulfate as the aluminum remover. The experimental results shows that under the conditions of reaction temperature of 80℃, reaction time of 120min, mole ratio of NH₄⁺/Al³⁺ of 1.0, cooling terminal temperature of 25℃, and cooling time of 30min, the aluminum removal rate is more than 80%, zinc loss rate is less than 0.6%, and sulfuric acid loss rate ranges from 60% to 65%. The optimized conditions were applied to production practice, and the practice show that the method had the characteristics of simple operation and high stability in aluminum removal, but there are also issues such as high concentration of NH₄⁺ in liquid after aluminum removal, high loss rate of sulfuric acid, difficult utilization of aluminum removal residue and high residue rate, which should be adjusted appropriately in practical applications.