Coal breakage characterisation. Part 3: applications of the multi-component model for HGI prediction and breakage simulations

Shi, Fengnian (2014) Coal breakage characterisation. Part 3: applications of the multi-component model for HGI prediction and breakage simulations. Fuel, 117 PARTB: 1163-1169. doi:10.1016/j.fuel.2013.07.032

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Author Shi, Fengnian
Title Coal breakage characterisation. Part 3: applications of the multi-component model for HGI prediction and breakage simulations
Journal name Fuel   Check publisher's open access policy
ISSN 0016-2361
1873-7153
Publication date 2014-01-30
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.fuel.2013.07.032
Volume 117
Issue PARTB
Start page 1163
End page 1169
Total pages 7
Place of publication Oxford, United Kingdom
Publisher Elsevier
Collection year 2014
Language eng
Formatted abstract
Highlights
• Infer the HGI from the t10, predicted by the multi-component breakage model.
• Demonstrate the effects of particle size and density on PF grinding by simulations.
• Elucidate the non-linear phenomenon of the HGI effect on the PF production rate.

A new method was developed to infer the HGI (Hardgrove Grindability Index) values from the product fineness indicator, t10, predicted by the multi-component breakage model. A total of 41 sets of JKFBC (JK Fine-particle Breakage Characteriser) tests, on coals from Australia and China, plus ores containing various minerals and a clinker, were used to validate this method. The JKFBC and the multi-component breakage model have the potential to improve or replace the traditional HGI test. A new coal grindability index can be generated from the multi-component model parameters. As the major error sources associated with the traditional HGI test have been removed in this new approach, superior repeatability and reproducibility can be expected. More work is recommended in this area to validate this novel approach and to identify its limitations.

Simulations were conducted by employing the multi-component breakage model to demonstrate the effects of particle size and density on pulverised fuel (PF) grinding; to troubleshoot the PF production problems related to the coal properties; and to elucidate the observed trend of the non-linear phenomenon of the HGI effect on the PF milling capacity; whereby a 10 unit reduction in HGI from 50 to 40 requires four times more energy than a 10 unit HGI reduction from 90 to 80 in order to achieve the same PF production rate.
Keyword Coal
Breakage characterisation
HGI test
Multi-component breakage model
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online 31 July 2013

Document type: Journal Article
Sub-type: Article (original research)
Collections: Julius Kruttschnitt Mineral Research Centre Publications
Official 2014 Collection
Sustainable Minerals Institute Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
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Created: Wed, 30 Oct 2013, 01:45:49 EST by Jon Swabey on behalf of Julius Kruttschnitt Mineral Research Centre