Acid Leaching Performance of Gibbsite-type Bauxite with High Iron Content

Zhao Aichun; Zhang Ting’an; Lv Guozhi

doi:10.3969/j.issn.1000-6532.2022.01.024

2022 No. 1

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Article navigation > Multipurpose Utilization of Mineral Resources > 2022 > (1): 173-178

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Zhao Aichun, Zhang Ting’an, Lv Guozhi. Acid Leaching Performance of Gibbsite-type Bauxite with High Iron Content[J]. Multipurpose Utilization of Mineral Resources, 2022, (1): 173-178. doi: 10.3969/j.issn.1000-6532.2022.01.024

Citation:

Zhao Aichun, Zhang Ting’an, Lv Guozhi. Acid Leaching Performance of Gibbsite-type Bauxite with High Iron Content[J]. Multipurpose Utilization of Mineral Resources, 2022, (1): 173-178. doi: 10.3969/j.issn.1000-6532.2022.01.024

Acid Leaching Performance of Gibbsite-type Bauxite with High Iron Content

1.
School of Material Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi, China
2.
Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores of Ministry of Education, Northeastern University, Shenyang, Liaoning, China

Received Date: 28 January 2021

Revised Date: 14 March 2021

Publish Date: 25 February 2022

Abstract

Abstract

High-iron bauxite with low A/S ratio cannot be extracted economically by Bayer process. Taking a low-grade gibbsite ore abroad as the research object, the acid leaching performance of gibbsite was studied by using hydrochloric acid as leaching medium. The effects of ore particle size, liquid-solid ratio, time and temperature on leaching efficiency were investigated. The results show that temperature has a significant effect on the leaching effect of aluminum. When the particle size of ore is 55 μm, the ratio of liquid to solid is 100:7, the temperature is 105℃, and the time is 120 min, the leaching rate of aluminum and iron are both higher than 95%, and they are effectively leached. It is consistent with the characterization of leaching residue. The kinetics of the acid leaching process of the high iron gibbsite ore shows that the acid leaching process of iron and aluminum is controlled by internal diffusion.
- Acid leaching /
- Bauxite /
- Alumina

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References

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