Relationship between attachment probability and surface energy in adhesion process of gold particles to oil-carbon agglomerates

来源期刊：中南大学学报(英文版)2003年第4期

论文作者：伍喜庆 A.J. Monhemius R.J. Gochin

文章页码：318 - 323

Key words：attachment probability; surface energy; agglomerate; coal-gold-agglomeration; gold

Abstract: Based on the theoretical analyses, the adhesion process of fine gold particles to oil-carbon agglomerates in a dynamic system was quantitatively investigated in terms of the relationship between the attachment probability and the surface energy. The proposed way to establish this relationship is to firstly theoretically derive the formula to evaluate the surface energy change of the system by analyzing the adhesion process of a gold particle on an oil-carbon agglomerate in a mathematic and thermodynamic way. The obtained formula of the maximum energy change of unit surface area is,Δw′max=1/2σ_hw(cosθ-1), which involves two measurable elements: interfacial tension and contact angle. In a wellquantified system, based on the related model it is also possible to calculate the complicated concept, namely, the attachment probability by transferring other measurable indices. In this way, after some adhesion experiments and measurements of relevant parameters, the empirical relationship between the attachment probability and the surface energy change was established in an exponential function,Pa=Aexp(-ΔG_surf/k).