A review of bubble surface loading and its effect on bubble dynamics

Ai, Wang; Evans, Geoffrey M.; Mitra, Subhasish

doi:10.1016/j.mineng.2023.108105

Cited by 5 publications

(1 citation statement)

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“…Single bubble loading capacity and contact angle measurements were carried out on the coal samples which were treated by HIC to comprehensively analyze the changes in coal particle hydrophobicity after HIC [25]. The effects of different HIC conditions on single bubble loading capacity and contact angle were investigated.…”

Section: Single Bubble Loading Area and Contact Angle Measurementsmentioning

confidence: 99%

Changes in Surface Hydrophobicity of Coal Particles and the Formation of Coarse Particle–Bubble Clusters in the Process of High-Intensity Conditioning

Jia

Liu

et al. 2023

Processes

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The mechanism of high-intensity conditioning (HIC) has not been thoroughly revealed, and therefore this work investigates the effect of HIC on the surface hydrophobicity of coal with different particle sizes and the possible formation of particle–bubble clusters. The results show that different HIC conditions are required for coarse and fine particles. Coarse particles (+75 μm) require a higher turbulence intensity to increase collector dispersion, thereby increasing the adsorption of the collector. Fine particles (−75 μm) require a lower turbulence intensity to reduce the desorption of the collector. In this study, the optimum HIC conditions for coarse and fine particles are “2200 rpm + 1 min” and “1300 rpm + 1 min”, respectively. Interestingly, it seems that the adsorption capacity between fine particles and the collector is weaker than that for coarse particles. A non-enclosed HIC system produces up to 1.78 × 104/g bubbles in coarse particle–bubble clusters, and the mean bubble diameter is approximately 87 μm. The cluster achieves pre-mineralization and increases the apparent particle size, which is expected to improve flotation.

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Section: Single Bubble Loading Area and Contact Angle Measurementsmentioning

confidence: 99%