Medium-temperature calcination and acid pressure leaching extract the Al<sub>2</sub>O<sub>3</sub> from coal gangue: activation mechanism and kinetic analysis

Yang, Zhiyong; Zheng, Yunsheng; Ma, Zhijun; Cheng, Liang; Wang, Guangming; Qin, Ying

doi:10.1039/d3ra08901k

RSC Adv.

2024

DOI: 10.1039/d3ra08901k

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Medium-temperature calcination and acid pressure leaching extract the Al₂O₃ from coal gangue: activation mechanism and kinetic analysis

Zhiyong Yang,

Yunsheng Zheng,

Zhijun Ma

et al.

Abstract: Bauxite is an important strategic resource, and it is facing with the problem of balance between high demand of bauxite ore and low resource of bauxite reserves in China.

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Cited by 2 publications

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Lithium recovery from typical coal-based solid wastes: Critical technologies, challenges, and prospects

Cao,

Zhou,

Gao

et al. 2024

Chemical Engineering Journal

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Lithium recovery from typical coal-based solid wastes: Critical technologies, challenges, and prospects

Cao,

Zhou,

Gao

et al. 2024

Chemical Engineering Journal

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Dynamic characteristics of coal gangue subgrade filler under traffic load based on the hysteretic curves

Zhang,

Kang,

Zhang

2024

Sci Rep

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Traffic cyclic loading is the key factor that leads to the deterioration of the long-term service behavior of subgrade. A series of cyclic triaxial tests was carried out by the large-scale dynamic and static triaxial apparatus (LSDSTA) to study the dynamic behaviors of coal gangue subgrade filler (CGSF) under multi-step cyclic loading using the morphological characteristics of hysteretic curves (MCHC). MCHC was quantitatively characterized by four parameters, i.e., the unclosed degree (εphl), inclination of long axis degree (khl), area (Shl) and fullness degree (αhl). With the increase of dynamic strain, εphl increases exponentially. khl of the coal gangue sample first decreases and then shows an increasing trend with the increasing dynamic strain. The values of Shl are close to each other, and the energy dissipation in the sample is small. However, with the increase of dynamic strain, the specimen failure degree is increased, Shl increases exponentially, and the damping ratio increases. With the increase of dynamic strain, αhl increases approximately linearly. Confining pressure has a certain effect on the four parameters. There parameters can be recommended and used for quantitative analysis the dynamic behaviors of subgrade filler under traffic cyclic loading.

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Medium-temperature calcination and acid pressure leaching extract the Al₂O₃ from coal gangue: activation mechanism and kinetic analysis

Abstract: Bauxite is an important strategic resource, and it is facing with the problem of balance between high demand of bauxite ore and low resource of bauxite reserves in China.

Cited by 2 publications

References 22 publications

Lithium recovery from typical coal-based solid wastes: Critical technologies, challenges, and prospects

Lithium recovery from typical coal-based solid wastes: Critical technologies, challenges, and prospects

Dynamic characteristics of coal gangue subgrade filler under traffic load based on the hysteretic curves

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Medium-temperature calcination and acid pressure leaching extract the Al2O3 from coal gangue: activation mechanism and kinetic analysis

Abstract: Bauxite is an important strategic resource, and it is facing with the problem of balance between high demand of bauxite ore and low resource of bauxite reserves in China.

Cited by 2 publications

References 22 publications

Lithium recovery from typical coal-based solid wastes: Critical technologies, challenges, and prospects

Lithium recovery from typical coal-based solid wastes: Critical technologies, challenges, and prospects

Dynamic characteristics of coal gangue subgrade filler under traffic load based on the hysteretic curves

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Product

Resources

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Medium-temperature calcination and acid pressure leaching extract the Al₂O₃ from coal gangue: activation mechanism and kinetic analysis