自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 10    No. 4    December 2003

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Relationship between attachment probability and surface energy
in adhesion process of gold particles to oil-carbon agglomerates
WU Xi-qing(伍喜庆)1, A.J. Monhemius2, R.J. Gochin2

1.School of Resources Processing and Bioengineering,
Central South University, Changsha 410083, China;
2.Royal School of Mines, Imperial College, SW7 2BP, London, UK

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=1/2σhw(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(-ΔGsurf/k).

 

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

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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