Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (8): 1165-1168.DOI: 10.12068/j.issn.1005-3026.2014.08.023

• Materials & Metallurgy • Previous Articles     Next Articles

Novel Process for Comprehensive Utilization of HighIron Bauxite

XIN Haixia1, WU Yan2, TENG Fei1, ZHAI Yuchun1,2   

  1. 1 School of Resources & Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China; 2 School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2013-09-16 Revised:2013-09-16 Online:2014-08-15 Published:2014-04-11
  • Contact: XIN Haixia
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Abstract: The bauxite was characterized by Xray diffraction (XRD) and scanning electron microscopy (SEM), and the main phase and morphology of the raw material were determined. Aluminum, iron and silicon can be effectively separated by low temperature sulfuric acid roasting process. The effects of process parameters on the extraction rates of aluminum and iron were investigated experimentally. When the amount of sulfuric acid is 12 times as the amount of theory, the extraction rates of aluminum and iron are above 92% at 350℃ for 60min. Most of the iron in the filtrate was deposited by natrojarosite method, and the iron precipitation rate could reach more than 90%, with the aluminum deposition rate controlled within 5%.

Key words: highiron bauxite, comprehensive utilization, extraction of aluminum and iron, sulfuric acid, roasting, natrojarosite

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