Raymond mill has a status quo of use, I believe that the majority of ultra-fine grinding customers are very concerned about this problem, then the professional Raymond machine manufacturers and everyone to discuss the current situation of the use of Raymond mill.
Throughout the current processing process of most Raymond mill production lines, there are no more than four main links of feeding - crushing, grading and collecting powder. Among them, pulverization and grading are the core links. The following problems are common in the original equipment: (1) The raw materials of the human grinding are coarse, and the feeding amount is not optimally controlled. At present, Raymond Mill 4R and SR use ordinary jaw crusher to crush large blocks of raw materials. Generally, they are crushed from Zoomm to 25-40mm. Because the raw materials are thicker and larger, the vibration of the roller is larger when the roller is rolled. The production efficiency is low, and the feeding adopts the electromagnetic vibrating feeder, which is generally controlled by experience. In order to avoid the pressure chamber blocking, the state of “eat half full” is usually adopted, which affects the powder discharging efficiency.

(2) The roller and the grinding ring in the main body of Raymond mill are fed by the blade. The continuous rolling of the raw material is the main part of the grinding of the mill. The centrifugal force generated by the suspension roller device hanging on the plum blossom frame during the rotation of the spindle Under the action of the pressure ring, under the action of the friction force, the roller rotates. The rotation of the roller that is pressed against the grinding ring forms a main mechanism for the crushing process of the raw material. However, this apparent lack of pressure is one of the main reasons for low production efficiency and high vibration noise. Therefore, many manufacturers are currently trying to increase this positive pressure, such as the use of pressure springs and hydraulic cylinders, but this way As a result of the complexity of the equipment and the increase in price, the traditional Raymond mill's free-swinging structure of the suspension roller can freely avoid some hard, one-time hard-to-crush large pieces during the movement, although the production efficiency is reduced. However, it protects the roller device from damage, so the simple and feasible method is to increase its centrifugal force, M02 of Fr. It is known that the centrifugal force depends on the equivalent mass m and the rotational angular velocity of the roller device. . Therefore, it is necessary to increase the equivalent quality of the grinding roller device and increase the speed of the main shaft, but this depends on the power and structural reliability of the main engine.
(3) Powder classification is a “bottleneck” of traditional Raymond mill, which usually uses a fan-like analyzer. The blade has few and narrow blades, low rotation speed and uneven inner and outer line speeds, and many ash leakage links, resulting in poor classification efficiency and large leakage of large particles. At present, some domestic manufacturers adopt the method of increasing the number of blades, engaging in double-layer structure and increasing the rotational speed. Although some grading fineness is improved, the effect is not large, and the content of large particles in the finished product is still high. In addition, the classification accuracy is also related to the air volume and wind pressure matching of the air supply system. The traditional Raymond mill blower is designed for the production of powders below 100-325 mesh. It usually has a large air volume and a small wind pressure, which also affects the classification effect.
(4) The traditional Raymond mill's powder collection system is realized by a cyclone dust collector. This single-cylinder large cyclone dust collector is designed for powders below 80-325 mesh, which is very efficient for fine powder collection. Low, some increase small cyclone, secondary powder collection, but the amount of fine powder is still more, and the entire production line is operating under positive pressure, dust spill, environmental pollution, poor working conditions, severe powder loss .