Leaching of zinc from calcined smithsonite using sodium hydroxide

Zhang, Yucheng and Deng, Jinxia and Chen, Jun and Yu, Ranbo and Xing, Xianran (2013) Leaching of zinc from calcined smithsonite using sodium hydroxide. Hydrometallurgy, 131-132. pp. 89-92. ISSN 0304-386X

Abstract

The processes of calcination and alkaline leaching were applied to treat a zinc oxide ore, smithsonite (ZnCO3). The phase evolution in the calcination was studied, as well as the effect factors on the leaching rate of Zn, such as calcination temperature, alkaline concentration, phase ratio of liquid to solid (L/S), leaching temperature and leaching time. It was found that the ZnCO3 had completely decomposed into ZnO when calcined for 2 h at 400 °C and the Zn leaching rate of ores calcined at 400 °C could be over 92% with 20% (6.25 mol/L) sodium hydroxide and a phase ratio of 80:1 for 4 h at 100 °C.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 19 Jun 2017 02:03
Last Modified: 08 Feb 2018 04:26
Uncontrolled Keywords: Alkaline leaching; Calcination; Leaching rate; Phase evolution; Smithsonite; Calcination temperature; Effect factors; Leaching rates; Phase evolutions; Sodium hydroxides; Zinc oxide ores; Zinc and Alloys;
Fields of Research : 09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091403 Hydrometallurgy
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1016/j.hydromet.2012.10.007
URI: http://eprints.usq.edu.au/id/eprint/31976

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