Advanced SearchSearch Tips
Experimental Evaluation of Cohesion Properties for Various Coals
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Experimental Evaluation of Cohesion Properties for Various Coals
Kim, Minsu; Lee, Yongwoon; Ryu, Changkook; Park, Ho Young; Lee, Hyun Soo;
  PDF(new window)
Assessing the handling properties of coal becomes a major issue for the operation of a fuel supply system in power plants, due to the increased types of coal imported into Korea. In this study, the cohesion strengths of 13 bituminous and sub-bituminous coals from different countries were tested by measuring the amount of force that leads to a failure of consolidated particles. The particle size was in the range of 0.1-2.8 mm, which represents the coarse particles before pulverization. While the cohesion strength was proportional to the compression force in the tested range, the effects of the surface moisture content and the weight fraction of fines were crucial for cohesive coals. At fixed conditions of surface moisture and particle size, large variations were found in the cohesion propensity between coals. For coals of 0.1-0.5 mm with the moisture added close to the critical value, cohesive coals had the density over after consolidation. The cohesion propensity was not correlated with the basic properties of coals with sufficient statistical significance.
Coal;cohesion;compression;handleability;moisture content;
 Cited by
International Energy Agency (IEA), "Key world energy statistics", 2012.

Korea Energy Economics Institute, "Yearbook of energy statistics 2012", Ministry of Knowledge Economy, 2012.

Nigel S Dong, "Utilisation of low rank coals", CCC/182. IEA Clean Coal Center, April, 2011.

C. Moon, Y. Sung, S. Ahn, T. Kim, G. Choi, D. Kim, "Thermochemical and combustion behaviors of coals of different ranks and their blends for pulverized-coal combustion", Applied Thermal Engineering, 54(1), pp.111-119, May, 2013. crossref(new window)

A. M. Carpenter, "Coal quality assessment - the validity of empirical test", CCC/63. IEA Clean Coal Centre, September, 2002.

H. Nalbandian, "Propensity of coal to self-heat", CCC/172. IEA Clean Coal Center, December, 2010.

M. Rhodes, "Introduction to Particle Technology. 2nd Edition", John Wiley & Sones, Ltd., Chichester, England, 2008.

R. A. Mikka and J.B. Smitham, "Coal handleability assessment", Coal Preparation, 12(1-4), pp.187-201, 1993. crossref(new window)

B. J. Arnold, "Effect of chemical and physical coal properties on handling behavior", Mining Engineering, 41, pp. 228-231, February, 1991.

Z. Zhong, J. Y. Ooi, J. M. Rotter, "Predicting the handlability of a coal blend from measurements on the source coals", Fuel, 84(17), pp. 2267-2274, December, 2005. crossref(new window)

D. W. Brown, "Factors affecting the handleability of coal and its measurement", Coal International, 245(4), pp.147-149, 1997.

D. W. Brown and N. J. Miles, "Assessment of coal handleability", Coal Preparation, 24(3-4), pp.99-122, 2004. crossref(new window)

CoalTech, Coal Technology: Influence of ash content, Available at, Accessed on February 7, 2016.

J. R. Johanson, "The Johanson $indicizer^{TM}$ system vs. the Jenike shear tester", Bulk Solids Handling, 12(2), pp.234-240, 1992.

J. Y. Ooi, J. M. Rotter, E. H. Lahlouh, Z. Zhong, "Blind trial on coals for rapid handling assessment", Proc. of 6th Int. Conf. on Bulk Materials Storage, Handling and Transportation, pp.73-78, 1998.

Z, Zhong, J.Y. Ooi and J.M. Rotter, "Large scale semi-automated tester for rapid assessment of coal handling performance", The Coal Research Forum 2005 Autumn Meeting, 2005.

S. V. Vassilev, C. G. Vassileva, D. Baxter, L. K. Andersen, "Relationships between chemical and mineral composition of coal and their potential applications as genetic indicators. Part 2. Mineral classes, groups and species", Geological Balcanica, 39(3), pp. 43-67, 2010.