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Particle–bubble interaction energies for particles with physical and chemical heterogeneities
Minerals Engineering ( IF 4.8 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.mineng.2020.106472
Allan Gomez-Flores , Scott A. Bradford , Gukhwa Hwang , Graeme W. Heyes , Hyunjung Kim

Abstract The interaction between a particle and bubble in a liquid medium is important in processes such as mineral flotation or paper deinking. The sum of van der Waals, electrostatic, and hydrophobic interaction energies can be calculated to predict if the net interaction is favorable or unfavorable for the particle to attach to the bubble. However, conventional interaction energy calculations only relate to smooth and chemically homogeneous surfaces. Particles used in flotation have natural and induced heterogeneities such as surface roughness (SR), surface charge heterogeneity (CH), and surface contact angle heterogeneity (CAH). We therefore numerically investigated the bubble−particle interaction energy for seven hypothetical combinations of SR, CH and CAH on the particle. It was found that the strength in which the heterogeneities influence the interaction energy barrier is in the order of CAH

中文翻译:

具有物理和化学异质性的粒子的粒子-气泡相互作用能

摘要 液体介质中颗粒和气泡之间的相互作用在矿物浮选或纸张脱墨等过程中很重要。可以计算范德华力、静电和疏水相互作用能的总和,以预测净相互作用对粒子附着在气泡上是有利还是不利。然而,传统的相互作用能计算只涉及光滑和化学均匀的表面。用于浮选的颗粒具有自然和诱导的异质性,例如表面粗糙度 (SR)、表面电荷异质性 (CH) 和表面接触角异质性 (CAH)。因此,我们对粒子上 SR、CH 和 CAH 的七种假设组合的气泡-粒子相互作用能进行了数值研究。
更新日期:2020-08-01
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