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Effect of the grinding behaviour of coal blends on coal utilisation for combustion

AuthorsRubiera González, Fernando ; Arenillas de la Puente, Ana ; Fuente Alonso, Enrique ; Miles, N.; Pis Martínez, José Juan
Hardgrove Index
Coal blends
Issue DateNov-1999
CitationPowder Technology 105(1-3): 351-356 (1999)
AbstractGrinding of a high volatile bituminous coal was performed in three comminution devices: Raymond Mill (RM), Rolls Crusher (RC) and Ball Mill (BM). The pulverised samples were sieved to obtain four particle size fractions, and temperature-programmed combustion (TPC) was used for the evaluation of their combustion behaviour. In addition, three coals of different hardness and rank were mixed in various proportions in order to compare the combustibility characteristics of the binary coal blends with those of the individual coals. The effect of coal blending on grindability was also studied. It was found that grindability was non-additive especially when coals of very different Hardgrove Grindability Index (HGI) were blended. The combustion studies also suggested that there exists an interaction between individual coals when they are burnt as a blend.
Publisher version (URL)http://dx.doi.org/10.1016/S0032-5910(99)00158-8
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