Title: Study on Intensified Leaching of Ferric Iron from Acid-leach Residues Using Sulfide as a Novel Leaching Agent
Abstract: Taking sulfide as a leaching agent,tests were conducted on the intensified-leaching of iron oxide from acid-leach residue.Influence of different factors,such as consumption of leaching agent,dosage of sulfuric acid,leaching time and temperature,as well as liquid-solid ratio,on the leaching effect was investigated.Results show that iron leaching rate reaches 89.2% and the leach rate of zinc from leaching agent is 90.2% under the following conditions of the initial liquid/solid ratio being 2∶1,the mass ratio of leaching agent to residue being 0.69∶1,excess coefficient of sulfuric acid being 1.4,with a stirring rate at 1 300 r/min and reaction at the temperature of 95 ℃ for 2 h.The tailings obtained can also be used for further gold-extraction.This process is simple with low energy consumption compared with the existing technology,and sulfuric acid consumption is greatly reduced.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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