Journal of Northeastern University(Natural Science)

Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (8): 1169-1173.DOI: 10.12068/j.issn.1005-3026.2014.08.024

• Materials & Metallurgy • Previous Articles     Next Articles

Roasting of Low Grade Zinc Oxide Ore by Concentrated Sulfuric Acid

WANG Le1， MU Wenning2， LIU Shaoming1， ZHAI Yuchun1   

  1. 1 School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China; 2 School of Resources & Materials， Northeastern University at Qinhuangdao， Qinhuangdao 066004， China.
  • Received:2013-10-09 Revised:2013-10-09 Online:2014-08-15 Published:2014-04-11
  • Contact: MU Wenning
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Abstract: Zn， Fe and Al were extracted from low grade zinc oxide ore obtained from China by the new technique of concentrated sulfuric acid roasting. The effects of reaction temperature， reaction time and molar ratio of acid to ore on extraction rate of Zn， Fe， Al were investigated. Microstructures and components of the zinc calcine and tailing were characterized by scanning electron microscope (SEM) and Xray diffraction (XRD) analyzer. On the basis， the optimum reaction condition was obtained through orthogonal tests. Results showed that the extraction rates of Zn， Fe and Al were 9902%， 2378% and 7768% respectively， when the ores were roasted for 120min at 6735K and molar ratio of acid to ore was 16∶1. The elements of Si， Ca and Pb were enriched in the residue.

Key words: low grade zinc oxide ore, concentrated sulfuric acid roasting, zinc sulfate, extraction rate, orthogonal test

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