The properties of the material include comminuted material properties and density. The crushed material of the jet mill is taken out of the crushing chamber by the negative pressure airflow caused by the fan, enters the material collection system, is filtered by the filter bag, the air is discharged, the material and dust are collected, and the crushing is completed. The super fine grinder is a device that uses air separation, heavy pressure grinding, and shearing to achieve ultrafine grinding of dry materials. It is composed of cylindrical crushing chamber, grinding wheel, grinding rail, fan, material collection system and so on. The super fine grinder material enters the cylindrical crushing chamber through the feeding port, and is crushed and sheared by the grinding wheel moving in a circular motion along the grinding track to achieve crushing. Grindability has a great influence on the processing capacity of the material. Usually based on the actual results of the process to determine what kind of pulverizer to use in grinding, calculate the experimental results obtained by scaling, but; or check the working refractive index of the material, per ton of material to get the power consumption mill, and then determine the required mill specifications.