| Recovery of zinc from low-grade zinc oxide ores by solvent extraction |
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| 作者姓名： | QIN Wen-qing |
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| 作者单位： | School of Resource Processing and Bioengineering，Central South University，School of Resource Processing and Bioengineering，Central South University，School of Resource Processing and Bioengineering，Central South University Changsha 410083，China，Changsha 410083，China，Changsha 410083，China |
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| 基金项目： | TheSpecialFundfortheNationalExcellentDoctoralThesis(No .2 0 0 0 47) |
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| 摘 要： | 1 INTRODUCTIONZincoxideoresarethemainsourceofzincmetalaf terzincsulfideores .Withtheescalatingdepletionofzincsulfideores,zincoxideoresincludingwillemite(Zn2 SiO4 ) ,hemimorphiteZn4 (Si2 O7) (OH)·H2 O]andsmithsonite (ZnCO3) ,becameanimportantsourceofzinc1] .InChina,zincoxideoresarerelativelyabundant,whicharemainlystoredinsouthwestandnorth westChi na,suchasYunnan ,Sichuan ,GuangxiandGansuprovince2 ] .Manystudieshavebeendoneontheconcentrationofzincoxideores,yettheprogressesaresli…
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| 收稿时间： | 20 October 2002 |
Recovery of zinc from low-grade zinc oxide ores by solvent extraction |
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| Qin Wen-qing , Lan Zhuo-yue and Li Wei-zhong.Recovery of zinc from low-grade zinc oxide ores by solvent extraction[J].Journal of Central South University of Technology,2003,10(2):98-102. |
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| Authors: | Qin Wen-qing Lan Zhuo-yue and Li Wei-zhong |
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| Affiliation: | (1) School of Resource Processing and Bioengineering, Central South University, 410083 Changsha, China |
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| Abstract: | The recovery of zinc from low-grade zinc oxide ores with solvent extraction-electrowinning technique was investigated by using D2EHPA as extractant and 260 # kerosene as diluent. The results show that it is possible to selectively leach zinc from the ores by heap leaching. The zinc concentration of leach solution in the first leaching cycle is 32.57 g/L, and in the sixteenth cycle the zinc concentration is 8.27g/L after solvent extraction. The leaching solution is subjected to solvent extraction, scrubbing and selective stripping for enrichment of zinc and removal of impurities. The pregnant zinc sulfate solution produced from the stripping cycle is suitable for zinc electrowinning. Extra-pure zinc metal was obtained in the electrowinning test under conventional conditions. |
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| Keywords: | zinc low-grade zinc oxide ores heap leaching solvent extraction |
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