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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 18    No. 6    December 2008

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Simulated small-scale pilot heap leaching of low-grade copper sulfide ore with selective extraction of copper
QIN Wen-qing(覃文庆), ZHANG Yan-sheng(张雁生), LI Wei-zhong(黎维中), WANG Jun(王 军)

School of Resource Processing and Bioengineering, Central South University, Changsha 410083, China

Abstract:The bioleaching of low-grade copper sulfide ore and the selective extraction of copper were investigated. Lix984 dissolved in kerosene was used as extractant. The results show that it is possible to selectively leach copper from the ores by heap leaching. The copper concentration of leaching liquor after 250 d is 2.17 g/L, and the copper concentration is 0.27 g/L after solvent extraction. The leach liquor was subjected to solvent extraction, scrubbing and selective stripping for the enrichment of copper and the removal of impurities. The pregnant copper sulfate solution produced from the stripping cycle is suitable for copper electro-winning.

 

Key words: bioleaching; chalcopyrite; extraction; Lix98; copper

ISSN 1672-7029
CN 43-1423/U

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