High loaded coal water mixture prepared from the products of conventional grinding is not appropriate enough for closer packing due to lack of bi-nodal size distribution of particles. Bi-nodal size distribution is a requisite to attain minimum voids in the distribution matrix so as to get a best packing in the high solid loaded systems. To prepare a high concentrated coal slurry using beneficiated non-coking coal at finer size range, the packing density of solid particles has been studied using samples from different methods as adopted in the laboratory. Three methods were adopted to prepare the sample for the study to reduce the voidage among the solid particles and to get bi-nodal size distribution suitable for the high concentration coal slurry. To test the maximum packing efficiency, we have taken the model of Alfred as a route. Alfred's equation was modified slightly on the basis of Malvern particle size distribution analysis. Packing efficiency has been verified with experimental results as the percentage of packing is around 85 when the packed coal volume content of the solid is 62 with the coal of specific gravity 1.4.
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