Balling and granulation kinetics revisited

Kapur, P. C. ; Runkana, V. (2003) Balling and granulation kinetics revisited International Journal of Mineral Processing, 72 (1-4). pp. 417-427. ISSN 0301-7516

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S03017...

Related URL: http://dx.doi.org/10.1016/S0301-7516(03)00116-9

Abstract

Balling of finely comminuted solids by random coalescence and granulation of iron ore fines and other minerals by autolayering are two major size enlargement processes. The existing kinetic model for random coalescence does not take into account the strong dependence of coordination number on the size distribution of agglomerating entities. We present a coordination number based coalescence model, which mimics the underlying physical process more realistically. Simulations show that in spite of highly diverse model structures, random and coordination coalescence models give remarkably similar results. Only static models of autolayering are available presently. These map the input size distribution of feed solids into steady state or terminal size distribution of granules, with little or no information on the path traversed by the process. We propose a continuous-time dynamic model of autolayering within the population balance framework. The model, which is based on the proportionate growth postulate of autolayering, agrees reasonably well with experimental data.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Balling and Granulation; Modeling of Kinetics by Coalescence and Autolayering; Population Balance Equations
ID Code:17766
Deposited On:16 Nov 2010 12:43
Last Modified:17 May 2016 02:24

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