Contents and principles of grinding mill

Grinding mills are widely used in the grinding and processing of mineral products in the fields of metallurgy, building materials, chemicals, mining, etc. According to the fineness of the material to be ground and the fineness of the material to be discharged, grinding mills can be divided into six types of grinding mills: vertical swing grinding mill, high-pressure suspension roller grinding mill, high-pressure micro powder grinding mill, straight-through centrifugal grinding mill, overpressure trapezoidal grinding mill, and three-ring medium-speed grinding mill.
Working principle
The grinding mill consists of a main machine, an analyzer, a blower, a finished product cyclone separator, a pipeline device, a motor, etc. The main machine consists of a frame, an air inlet volute, a scraper, a grinding roller, a grinding ring, a cover and a motor. Auxiliary equipment includes jaw crushers, bucket elevators, electromagnetic vibrating feeders, electric control cabinets, etc. Users can flexibly choose according to the on-site conditions.
Working Principle
After the material is crushed to the required particle size, the elevator will send the material to the storage hopper, and then the vibrating feeder will evenly and continuously send the material into the grinding chamber of the Raymond mill. Due to the centrifugal force during rotation, the grinding roller swings outward and presses against the grinding ring. The scraper scoops up the material and sends it between the grinding roller and the grinding ring. The grinding roller rolls to achieve the purpose of crushing. The fine powder after grinding is brought into the analyzer for sorting with the circulating air of the blower. The material with too coarse fineness falls back to the re-grinding, and the qualified fine powder enters the finished product cyclone powder collector with the air flow and is discharged through the powder outlet pipe to become the finished product. In the grinding chamber of the Raymond mill, there is a certain amount of moisture in the material to be ground, heat is generated during grinding, water vapor evaporates, and the interfaces of the pipelines of the whole machine are not tight, so the external gas is sucked in, which increases the circulating air pressure, ensuring that the mill works under negative pressure. The increased air flow is discharged into the dust collector through the residual air duct and discharged into the atmosphere after purification.