The advantages of colloid mill, compared with pressure homogenizer, colloid mill is a centrifugal equipment first, its advantages are simple structure, easy maintenance of equipment, suitable for materials with higher viscosity and larger particles. Its main disadvantage is also determined by its structure. Due to the centrifugal movement, the flow rate is not constant, and the flow rate varies greatly for materials with different viscosities. For example, the same equipment, when processing viscous paint materials and thin milk fluids, the flow rate can differ by more than 10 times; secondly, due to the high-speed friction between the stator and the material, it is easy to generate greater heat. Denature the processed material; third, the surface is easier to wear, and after wear, the refining effect will be significantly reduced.