Factors affecting slurry viscosity
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Generally, materials with a larger particle size distribution have better flowability, while those with smaller particles have poorer flowability. Is this because the presence of more small particles results in a larger specific surface area and stronger intermolecular forces? I’m a bit skeptical; it seems to me that fluidity is mainly determined by the obstacles between particles during their movement. When there are many large particles, the spatial obstacles between them are smaller, whereas when there are many small particles, the influence between particles is greater. Is that correct? Hope fellow sailors can give some guidance
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In fact, there are many factors that affect the viscosity of coal slurry: coal content, additives, coal slurry concentration, water quality, particle size distribution, etc. The particle size distribution indeed has a significant impact on viscosity; for example, an excessive amount of particles with a size of 325 mesh will inevitably lead to an increase in viscosity. Optimizing the particle size distribution is necessary to improve the quality of the coal slurry, resulting in a concentration that is both high and has moderate viscosity.
Fine particles have a larger specific surface area, resulting in more severe friction between the particles. The intermolecular forces of such macroscopic substances have little impact.