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2013•Applied Mechanics and MaterialsOpen access

Recovery of Copper from Flotation Tailings by Leaching

Dan Liu, Shu Ming Wen, Yong Jun Xian, Hai Ying Shen, Jiushuai Deng, Dan Dan Wu

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Abstract

A technology route of Reverse flotation of acid-consuming gangue mineralsAcid leaching for copperExtractingElectrodepositing is proposed for recovery copper from a tailings with high content of calcium oxide and magnesium oxide and high content of combined copper oxide. The effect of H2SO4 concentration, leaching time and stirring speed on copper leaching was investigated. The leaching solution obtained under the optimal copper leaching conditions, was used to be proceeded for extracting and electrodepositing test. The best leaching conditions are stirring speed of 30 m/min, H2SO4 concentration of 150 Kg/t ore, leaching time of 30 minutes. Under the best conditions, the acid leaching test presented that the production of per ton copper consumes sulfuric acid of 17.31 t, and Cu leaching rate is 84.70%.

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A technology route of Reverse flotation of acid-consuming gangue mineralsAcid leaching for copperExtractingElectrodepositing is proposed for recovery copper from a tailings with high content of calcium oxide and magnesium oxide and high content of combined copper oxide. The effect of H2SO4 concentration, leaching time and stirring speed on copper leaching was investigated. The leaching solution obtained under the optimal copper leaching conditions, was used to be proceeded for extracting and electrodepositing test. The best leaching conditions are stirring speed of 30 m/min, H2SO4 concentration of 150 Kg/t ore, leaching time of 30 minutes. Under the best conditions, the acid leaching test presented that the production of per ton copper consumes sulfuric acid of 17.31 t, and Cu leaching rate is 84.70%.

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Available abstract

A technology route of Reverse flotation of acid-consuming gangue mineralsAcid leaching for copperExtractingElectrodepositing is proposed for recovery copper from a tailings with high content of calcium oxide and magnesium oxide and high content of combined copper oxide. The effect of H2SO4 concentration, leaching time and stirring speed on copper leaching was investigated. The leaching solution obtained under the optimal copper leaching conditions, was used to be proceeded for extracting and electrodepositing test. The best leaching conditions are stirring speed of 30 m/min, H2SO4 concentration of 150 Kg/t ore, leaching time of 30 minutes. Under the best conditions, the acid leaching test presented that the production of per ton copper consumes sulfuric acid of 17.31 t, and Cu leaching rate is 84.70%.

Key concepts: Leaching (pedology), Tailings, Gangue, Copper, Sulfuric acid, Copper extraction techniques, Metallurgy, Magnesium

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