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how to sense the coal particle size while crushing

By crushing method, the powdered coal with particle size 45 μm and volume fraction 90 vol% was defined as the fine coal. The coal with particle size 100–125 μm and volume fraction 90 vol% was defined as the coarse coal. Particle size distribution of fine coal and coarse coal is shown in Fig. 1(b). Particle size distributions of SP, NaHCO 3 ...

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