| Relationship between attachment probability and surface energy in adhesion process of gold particles to oil-carbon agglomerates |
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| 作者姓名： | WU Xi-qing |
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| 作者单位： | School of Resources Processing and Bioengineering，Royal School of Mines，Royal School of Mines Central South University，Changsha 410083，China，Imperial College，SW7 2BP，London，UK，Imperial College，SW7 2BP，London，UK |
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| 基金项目： | ProjectsupportedbyScholarshipofImperialCollege,UniversityofLondon |
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| 摘 要： | 1 INTRODUCTIONInflotationfield ,someattentionshavebeenpaidtomodelingtheprocessofflotationinordertoobtainadeepunderstandingofhowamineralparticleisat tachedtoabubble .Schulze1] analyzedtheelementaryprocessesofflotationintermsofphysico chemistry .Anfrunsetal2 ] studiedthebubble particleattachmentexperimentallyinthecaseofpotentialflow .Solarietal3] investigatedtheeffectofbubblesizesonadhesionprobability .Polatetal4 ] estimatedthetruedistribu tionofflotationrateconstantsforafirst orderkin…
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| 收稿时间： | 13 April 2003 |
| 修稿时间： | 26 June 2003 |
Relationship between attachment probability and surface energy in adhesion process of gold particles to oil-carbon agglomerates |
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| Wu Xi-qing , A. J. Monhemius and R. J. Gochin.Relationship between attachment probability and surface energy in adhesion process of gold particles to oil-carbon agglomerates[J].Journal of Central South University of Technology,2003,10(4):318-323. |
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| Authors: | Wu Xi-qing A J Monhemius and R J Gochin |
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| Affiliation: | (1) School of Resources Processing and Bioengineering, Central South University, 410083 Changsha, China;(2) Royal School of Mines, Imperial College, SW7 2BP London, UK |
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| 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(cos ϑ−1), which involves two measurable elements: interfacial tension and contact angle. In a well-quantified 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,
P
a=Aexp(−ΔG
surf/k).
Foundation item: Project supported by Scholarship of Imperial College, University of London |
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| Keywords: | attachment probability surface energy agglomerate coal-gold-agglomeration gold |
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