Behavior and mechanism of different fraction lead leach with several typical sulfate lixiviants in the weathered crust elution-deposited rare earth ore

Tang, Jie; Qiao, Jiyang; Xue, Qi‐Kun; Liu, Fei; Fan, Xin; Siwen, Liu; Yi, Huang

doi:10.1007/s11356-021-13039-w

Cited by 10 publications

(1 citation statement)

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“…However, numerous studies have shown that ionic rare earth ores are prone to transport, stripping, and migration precipitation of microfine particles in the in situ leaching process [28,29]. The leaching process is complicated by the hydration mechanism between the leaching agent and the ore surface, and the interparticle bridge bond is prone to breakage due to the presence of multiple forces and dispersion in the ion adsorption and exchange process [30,31], resulting in the migration and rearrangement of microfine particles. In the pore throat, the clogging phenomenon is produced by precipitation at the pore throat.…”

Section: Discussionmentioning

confidence: 99%

Changes in Microfine Particle Migration of Ionic Rare Earth Ores during Leaching

Deng

Wan

et al. 2023

Sustainability

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The hydration mechanism between the leaching agent and ore surface during the leaching process of ionic rare earth ore is complicated, and the inter-particle bridge cementation is prone to fracture due to the existence of multiple forces and dispersion during ion adsorption and exchange, resulting in migration and rearrangement of microfine particles, and precipitation at the pore throat, producing blockage phenomenon and affecting the leaching efficiency of ionic rare earths. In order to reveal the migration law of microfine particles during in situ leaching of ionic rare earth ores and to find suitable regulation methods, this paper investigates the effects of leaching agent mass concentration, viscosity, flow rate, hydraulic gradient, ore body height, and ore body water content on the migration of microfine particles. We compared ionic rare earth ores as raw ores and rare earth ores with particle sizes ranging from 0.075 to 0.09 mm using the laboratory column leaching method. The results showed that the migration of microfine particles during ionic rare earth ore leaching was an important factor affecting leaching efficiency. Under the action of external forces, the microfine particles tended to migrate with the leaching agent during the leaching process.

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