Do you know the factors that are affecting the bulk the density of powder?

       

There are many factors affecting the bulk density of powder, such as powder particle shape, size, surface roughness and particle size distribution. Generally, these factors are obviously different due to the different preparation methods and process conditions of powder.

Generally speaking, the bulk density of powder decreases with the decrease of particle size, the increase of particle non spherical coefficient and the increase of surface roughness. The effect of particle size composition on the bulk density of powder is not single value, which is often determined by the effects of particle filling voids and bridging. If the latter is dominant, the loose density of the powder will be reduced; If the former is dominant, the loose density of the powder is increased. In order to obtain the required loose density of powder, in addition to the above factors, it is also feasible to classify and batch reasonably.

In addition to the density of raw materials, the bulk density of powder is largely related to the shape, particle size and particle size distribution, surface state of powder particles and so on. The bulk density of irregular powder is smaller than that of regular powder; The more irregular the shape of the powder, the lower the loose density. One of the reasons is that the more irregular the powder, the greater its specific surface and the greater the friction between particles, so the loose density is lower; Similarly, the smaller the powder particle, the larger its specific surface, so the smaller the loose density of the finer powder.

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