iron powder bulk density

Bulk density is the density of natural accumulation of powder, which depends on the relative sliding resistance of the adhesion force between particles and the degree to which the gap of powder body is filled by small particles. 

A) Particulate size: the smaller the particle size, the smaller the loose density; 

b) Particulate shape: the complex shape, the small the loose degree;

C) Rough surface: the rougher the powder surface, the smaller the loose packing density;

D) Particle size distribution: the ratio of fine powder increases, and the density of loose powder decreases