Study of rheological parameters due to coal particle size change in pipeline transported coal slurry.

5.0–10.0 mm, 2.0–5.0 mm and 0.5–2.0 mm particle grades show a decreasing trend in mass percentage, with a rapid decrease in the mass percentage of 5.0–10.0 mm grades, while the mass percentage of 0.074–0.5 mm and < 0.074 mm grades show an increase in mass percentage, with a significant increasing trend in the < 0.074 mm grade.

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It was found that the yield stress and viscosity showed a significant trend with the change of particle size, and the effect of particle size distribution was more pronounced, especially at high mass concentration, which was quantitatively described by an exponential function.

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While the proportion of < 0.074 mm fine particles increased significantly, the content of 0.074–0.5 mm particle size class also showed an increasing trend.

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