Liquid spread mechanisms in high-temperature underground stope leaching

Zhi, Xue; Gan, Dan; Zhang, Youzhi; Liu, Zhiyi; Duan, Xidong; Huang, Mingqing

doi:10.1016/j.mineng.2020.106497

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…The above experiments prove the correctness of the theoretical research of Wu et al But Zuo et al [11] proposed using an electric field to enhance the seepage capacity of leaching solutions and proved that the permeability of the deposit is proportional to the strength of the electric field. This fully shows that the factors affecting permeability are not limited to the physical properties of the deposit, and we can also consider how the permeability of the deposit is affected from multiple aspects [12].…”

Section: Introductionmentioning

confidence: 88%

Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests

Wang

Sui

et al. 2020

Minerals

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In order to investigate the influence of the ion exchange process on the permeability of rare earth ore bodies in the leaching process, a laboratory-scale comparative experiment with ammonium sulfate solution and deionized (DI) water as leaching solutions is conducted. Compared with the DI water leaching test, the permeability coefficient of the rare earth ore sample leached by the ammonium sulfate solution gradually decreases at the beginning and then increases with the completion of leaching. The physical and morphological evolutions of rare earth ore samples in this comparative experiment are also monitored by nuclear magnetic resonance and scanning electron microscopy. It is concluded that the change in the permeability coefficient arises from the adsorption–desorption of a large number of clay microparticles, resulting in a dynamic evolution of pore structures. Further mechanism analysis suggests that the change in internal ionic strength caused by ion exchange and leaching solution seepage promotes the adsorption–desorption behavior of clay microparticles.

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Section: Introductionmentioning

confidence: 88%

Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests

Wang

Sui

et al. 2020

Minerals

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“…Stope leaching technology can effectively deal with the problems faced by underground mining (e.g. high in-situ stress, high temperature and high lift length), and has broad prospects to extract valuable metals from low-grade copper, gold, silver, and uranium ores with large burial depth 1 , 2 . The liquid penetration in packed beds is a key factor affecting the mineral extraction 3 .…”

Section: Introductionmentioning

confidence: 99%

“…Liquid capillary permeation, including liquid infiltration of ore and the transportation of valuable minerals out of the ore with liquid, is widely existed in the leaching process. Ilankoon 6 , 23 , Yin 31 , Xue 2 , and Miao 27 concluded that capillary permeation affects the liquid spread and mineral extraction in packed beds. However, only a few reports the capillary penetration.…”

Section: Introductionmentioning

confidence: 99%

Analysis of intra-particle liquid capillary spread mechanisms in high-temperature stope leaching using MRI

Zhi

Gan

Zhang

et al. 2022

Sci Rep

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Capillary penetration is widely existed in stope leaching, both the rate of liquid wetting ore and flow out of ore are affected by it. Stope leaching is carried out in a high-temperature environment when mining minerals with large burial depth. The mechanism of intra-particle liquid capillary penetration mechanisms at high-temperature have not been revealed. In this paper, samples with a size of Φ50 mm × 100 mm were selected for quantitative analysis. The capillary rise behaviour inside samples with different porosity were detected at 30 °C, 40 °C and 50 °C by using magnetic resonance imaging (MRI). In most cases, capillary rise height is underestimated when the outside wetting line is used as an indicator, because the rise height inside the sample is greater. The liquid capillary rise height increased slightly with the temperature, whereas the wetting surface profile remained unchanged. The capillary rise rate increased significantly with porosity, mainly due to the increase of internal effective porosity. The results help to understand the liquid penetration behaviour under high-temperature stope leaching condition, and lay a theoretical foundation for improving the liquid permeability.

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Tortuosity prediction and investigation of fluid flow behavior using pore flow approach in heap leaching

2022

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Liquid spread mechanisms in high-temperature underground stope leaching

Cited by 5 publications

References 31 publications

Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests

Permeability and Adsorption–Desorption Behavior of Rare Earth in Laboratory Leaching Tests

Analysis of intra-particle liquid capillary spread mechanisms in high-temperature stope leaching using MRI

Tortuosity prediction and investigation of fluid flow behavior using pore flow approach in heap leaching

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