Novel process for comprehensive utilization of high-iron bauxite

被引：2
作者：
Xin, Hai-Xia [1 ]
Wu, Yan [2 ]
Teng, Fei [1 ]
Zhai, Yu-Chun [1 ,2 ]
机构：
[1] School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao
[2] School of Materials and Metallurgy, Northeastern University, Shenyang
来源：
Dongbei Daxue Xuebao/Journal of Northeastern University | 2014年 / 35卷 / 08期
关键词：
Comprehensive utilization; Extraction of aluminum and iron; High-iron bauxite; Natrojarosite; Roasting; Sulfuric acid;
D O I：
10.3969/j.issn.1005-3026.2014.08.023
中图分类号：
学科分类号：
摘要：
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 60 min. 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%.
引用
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页码：1165 / 1168
页数：3
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