When the high pressure grinding mill work: After the material is pulverized to the required particle size, the material is sent to the storage hopper by the hoist, and then the material is uniformly and continuously fed into the Raymond mill main grinding chamber through the vibrating feeder, due to the centrifugal force during the rotation, The grinding roller swings outward, pressing against the grinding ring, and the blade shovels the material between the grinding roller and the grinding ring, and the grinding roller achieves the purpose of crushing. The fine powder after grinding of the material is brought into the analysis machine for sorting with the circulating wind of the blower, and the finely coarse material falls back to the regrind, and the qualified fine powder enters the finished cyclone powder collector with the airflow, and is discharged through the powder discharging tube. It is the finished product. In the Raymond grinding room, there is a certain amount of moisture in the material to be ground, heat is generated during grinding, water vapor evaporates, and the pipelines of the whole machine are not tightly connected. The outside air is sucked in, so that the circulating air pressure is increased to ensure that the high pressure grinding mill is negative. Working under pressure, the increased air flow is discharged into the dust collector through the residual air duct, and is purified and discharged into the atmosphere.