Journal article

Extraction of iron and aluminum from high-iron bauxite by ammonium sulfate roasting and water leaching

Ding Tian, Xiao-yi Shen, Yu-chun Zhai, Penny Xiao, Paul Webley

Journal of Iron and Steel Research International | SPRINGER | Published : 2019

Abstract

High iron content is one of the challenges in utilizing the refractory bauxites in China. An improved method for treating the high-iron bauxite by roasting with (NH4)2SO4 was proposed, which offers a possible alternative method for utilizing the high-iron bauxite. The influences of the roasting time, roasting temperature, material ratio, and ore particle size on the extraction ratios of Fe and Al were studied, and the orthogonal test was used to optimize the reaction conditions. The optimized reaction conditions were proposed as follows: roasting temperature of 450 °C, roasting time of 120 min, material ratio of (NH4)2SO4 to ore of 2.5:1.0, and ore particle size below 80 μm. The roasting mec..

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Grants

Awarded by National Natural Science Foundation of China


Awarded by National Basic Research Program of China


Awarded by Fundamental Research Funds for the Central Universities of China


Funding Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51774070), the National Basic Research Program of China (2014CB643405), and the Fundamental Research Funds for the Central Universities of China (150204009).