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| Review on Desulfurization of High-sulfur Bauxite |
| ZHENG Licong1,2, XIE Keqiang1,2, LIU Zhanwei1,2, MA Wenhui1,2
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1 The National Engineering Laboratory for Vacuum Metallurgy and State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology,Kunming 650093;
2 Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province and Engineering Research Center for Silicon Metallurgy and Silicon Materials of Yunnan Provincial Universities,Kunming University of Science and Technology,Kunming 650093 |
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Abstract The desulfurization of high-sulfur bauxite has become the hot issue for solving the shortage of high-quality bauxite resources in our country. In this paper, the composition, phase and morphology of high-sulfur bauxite are summarized. The behavior and harmfulness of sulfur and iron in high-sulfur bauxite during the process of producing alumina by the Bayer method is also described comprehensively. The research on the mechanism, methods and effects of desulfurization are introduced in detail. The three-step strategy (flotation, oxidation and precipitation) are proposed to desulfurization of high-sulfur bauxite. At first, the sulfur in the high-sulfur bauxite with highest pyrite can be removed by the flotation process, and then concentrate the bauxite with higher pyrite and sulfur can be removed through S2- oxidation in the dissolution process and SO42- precipitated by adding barium salt. Finally, the prospect of desulfurization of high sulfur bauxite is discussed briefly.
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Published: 02 May 2018
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2017, Vol. 31 
