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Metal Mine ›› 2015, Vol. 44 ›› Issue (10): 178-184.

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Recovery of Antimony and Copper by Fractional Precipitation from Leachate on Oxidation Acid Leaching-complex Method

Yang Huifen1,2, Zhang Yingying1,2,Wang Chuanlong1,2,Tan Haiwei1,2,Meng Jiale1,2   

  1. 1.School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Key Laboratory of High-efficient Mining and Safety of Metal Mines,Ministry of Education,Beijing 100083,China
  • Online:2015-10-15 Published:2015-11-20

Abstract: There is 538.51 mg/L Sb and 395.91 mg/L Cu in a leachate from a smelting plant in Hechi,Guangxi Province.Antimony recovery by hydrolysis precipitation method,copper recovery by Na2S precipitation from residual liquid from antimony precipitation on the leachate experiment results showed that antimony hydrolysis precipitation at the stirring speed of 150 r/min,reaction at 56 ℃for 20 min,final pH=3.15,precipitation antimony products with antimony grade and precipitation rate of 10.35%,98.23% is obtained.Residual liquid from antimony precipitation with Na2S dosage of 2.5 g/L,stirring speed of 150 r/min,reaction at 50 ℃for 10 min,stewing for 20 min and then enduring filtration,precipitation copper products with copper grade and precipitation rate of 36.92%,98.38% is obtained.The tests proved that fractional precipitation is a feasible method to recycle antimony,copper from the leachate.

Key words: Leachate, Antimony recovery by hydrolysis precipitation, Copper recovery by Na2S precipitation,Sb(OH)3, CuS