Professional Mill Equipment Grain Grinding Line Maize Milling Machine

The motor drives the grinding disc to rotate through a vertical reducer, and solid raw materials enter the center of the grinding disc through the air lock feeding device. Under the action of the centrifugal force field, they are thrown towards the periphery of the grinding disc and crushed by repeated rolling of the grinding roller. The crushed material overflows from the edge of the grinding plate, and the powdery material therein is carried up by a high-speed airflow rising from the lower part of the machine. When the rising airflow and powdery material pass through the powder concentrator at the upper part of the mill, under the action of a rapidly rotating rotor, the coarse powder is separated and falls into the center of the grinding plate for re grinding, while the fine powder is grinded out from the upper part of the mill with the airflow, and is collected in the dust collection device, which is called a product. Granular materials that have not been carried away by the air flow overflow the grinding plate and are returned to the feed inlet of the mill through an external circulation bucket elevator, where they enter the mill together with the newly fed raw materials for re grinding. For materials with high moisture content, hot air is introduced into the mill, and wet materials are fully contacted with the hot air flow during the grinding, powder selection, and flow processes to be dried to meet the product moisture requirements.

The residence time of materials on a grinding plate is mainly determined by three factors: first, the speed of the grinding plate that affects the magnitude of centrifugal force; The second is the friction between the material and the grinding plate and the internal friction of the material itself; The third is the structural form and coordination between the grinding disc and the grinding roller that determines the movement stroke mode. The third factor is the key to determining the design ideas of each vertical mill manufacturer. Different grinding roller and disc forms determine the grinding disc speed and the residence time of materials on the grinding disc of each manufacturer. When selecting a vertical mill, users must select a suitable vertical mill based on the characteristics of the grinding material.