Study on efficient desulfurization and desilication process of low-grade bauxite

JIANG Zhengshuai; XIA Feilong; ZHANG Shanshan; ZHANG Qiang; ZHANG Min

doi:10.13264/j.cnki.ysjskx.2022.03.004

Volume 13 Issue 3

Jun. 2022

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Nonferrous Metals Science and Engineering > 2022 > 13(3): 26-34. > DOI: 10.13264/j.cnki.ysjskx.2022.03.004

JIANG Zhengshuai, XIA Feilong, ZHANG Shanshan, ZHANG Qiang, ZHANG Min. Study on efficient desulfurization and desilication process of low-grade bauxite[J]. Nonferrous Metals Science and Engineering, 2022, 13(3): 26-34. DOI: 10.13264/j.cnki.ysjskx.2022.03.004

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Study on efficient desulfurization and desilication process of low-grade bauxite

1.
College of Mechanical Engineering, Shangqiu Institute of Technology, Shangqiu 476000, Henan, China
2.
Guizhou Wengfu Lantian Fluorine Chemical Co., Ltd., Guiyang 550501, China
3.
College of Material and Metallurgy, Guizhou University, Guiyang 550025, China
4.
Guizhou Province Key Laboratory of Metallurgical Engineering and Process Energy Saving, Guiyang 550025, China
5.
Tianjin Advanced Equipment Research Institute of Tsinghua University Luoyang Advanced Manufacturing Industry Research and Development Base, Luoyang 471000, Henan, China

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Received Date: May 27, 2021
Revised Date: September 17, 2021
Available Online: July 15, 2022

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Abstract

Abstract

Bauxite was treated by suspension roasting alkali leaching desilication, and the effects of roasting temperature, caustic concentration and alkali leaching temperature on baked ore alkali leaching silicon were studied. The results show that with a better temperature of suspension roasting of 930 ℃, when the liquid-solid ratio is 8:1, desilicate time is 30 min, caustic alkali concentration is 110 g/L and desilicate temperature is 95 ℃, a higher esilicate rate can be obtained, up to 49.24%. With the loss rate of Al₂O₃ down to 2.03%, the concentrate Al/Si can be raised to 8.21, and the actual dissolution rate of suspended baked silica concentrate can reach 94.79%. With lime as the desilication agent, after the desilication of alkali-immersed lyate, the roasting ore can be recycled for cycle desilication. After desilication, the Al/Si ratio of the concentrate can reach more than 7 so that the alkali liquor after desilication can be recycled.
- bauxite,
- suspension roasting,
- alkali leaching,
- cycle desilication

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References

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Study on efficient desulfurization and desilication process of low-grade bauxite

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