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Effect of Packing Density on Preparation of High Concentration Coal Slurry

机译:装填密度对高浓度煤浆制备的影响

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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.
机译:由常规研磨的产品制备的高负荷煤水混合物由于缺乏双节点尺寸分布而不足以适合于紧密堆积。双节点尺寸分布是在分布矩阵中获得最小空隙以便在高固体负荷系统中获得最佳填充的必要条件。为了在更细的尺寸范围内使用精选的非焦化煤制备高浓度煤浆,已使用实验室采用的不同方法的样品研究了固体颗粒的堆积密度。采用三种方法制备了用于研究的样品,以减少固体颗粒之间的空隙并获得适用于高浓度煤浆的双节点尺寸分布。为了测试最大包装效率,我们采用了Alfred模型作为路线。在马尔文粒度分布分析的基础上,对阿尔弗雷德方程进行了稍微修改。装箱效率已通过实验结果得到验证,当固体的装箱煤体积含量为62且比重为1.4的煤时,装箱百分比约为85。

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