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Prediction of coal grindability based on petrography, proximate and ultimate analysis using multiple regression and artificial neural network models
Department of Mining Engineering, Science and Research Branch,Islamic Azad University.ORCID iD: 0000-0002-2265-6321
Center for Applied Energy Research, University of Kentucky, USA.
Department of Mining Engineering, Science and Research Branch,Islamic Azad University.
Department of Mining Engineering, Research and Science Campus, Islamic Azad University, Iran.
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2008 (English)In: Fuel Processing Technology, ISSN 0378-3820, Vol. 89, no 1, p. 13-20Article in journal (Refereed) Published
Abstract [en]

The effects of proximate and ultimate analysis, maceral content, and coal rank (Rmax) for a wide range of Kentucky coal samples from calorific value of 4320 to 14960 (BTU/lb) (10.05 to 34.80 MJ/kg) on Hardgrove Grindability Index (HGI) have been investigated by multivariable regression and artificial neural network methods (ANN). The stepwise least square mathematical method shows that the relationship between (a) Moisture, ash, volatile matter, and total sulfur; (b) ln (total sulfur), hydrogen, ash, ln ((oxygen + nitrogen)/carbon) and moisture; (c) ln (exinite), semifusinite, micrinite, macrinite, resinite, and Rmax input sets with HGI in linear condition can achieve the correlation coefficients (R2) of 0.77, 0.75, and 0.81, respectively. The ANN, which adequately recognized the characteristics of the coal samples, can predict HGI with correlation coefficients of 0.89, 0.89 and 0.95 respectively in testing process. It was determined that ln (exinite), semifusinite, micrinite, macrinite, resinite, and Rmax can be used as the best predictor for the estimation of HGI on multivariable regression (R2 = 0.81) and also artificial neural network methods (R2 = 0.95). The ANN based prediction method, as used in this paper, can be further employed as a reliable and accurate method, in the hardgrove grindability index prediction.

Place, publisher, year, edition, pages
2008. Vol. 89, no 1, p. 13-20
Keywords [en]
Hardgrove grindability index, Coal petrography, Coal rank, Ultimate and proximate analysis, Artificial neural network
National Category
Mineral and Mine Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-72303DOI: 10.1016/j.fuproc.2007.06.004ISI: 000252668100003Scopus ID: 2-s2.0-36749037942OAI: oai:DiVA.org:ltu-72303DiVA, id: diva2:1272004
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2019-02-25

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Chelgani, Saeed Chehreh

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