The grinding technology of this mill is mainly composed of crushing, grinding, classification and collection. These steps are interlocking. In the crushing process, the original ore is crushed with a crusher to meet the feed particle size; in the milling process, the ground material enters the main machine cavity for grinding, and the crushing and grinding effect is achieved due to the rollers of the grinding roller. In the classification process, the crushed powder is blown by the airflow of the blower to the classifier above the main machine for sieving. The coarseness of the fine powder still falls into the main machine for regrind. After collection, the product is discharged through the powder outlet pipe (the particle size of the finished product can be as high as 0.008mm).