How to use the cage mill crusher and matters needing attention

There are many types of pulverizers, we will introduce them slowly, and now we will introduce the cage pulverizers. cage mill crusher are widely used because of their simple structure, firmness, smooth operation and good crushing effect. This article mainly introduces what is a cage mill crusher, how to use it and how to maintain it.

A photo of a cage mill crusher

What is a cage mill crusher?

A photo of a cage mill crusher

The cage mill crusher is a medium-sized horizontal cage mill crusher, which is designed according to the crushing principle of the impact crusher. The inner and outer two groups of cage bars rotate opposite each other at high speed, and the materials are crushed by the impact of the cage bars from the inside to the outside. It has the characteristics of simple structure, high crushing efficiency, good sealing performance, stable operation, easy cleaning and convenient maintenance.

How to use the cage mill crusher?

A photo of a cage mill crusher

When using the cage pulverizer, it is only necessary to place the pulverizer at the specified position of the site, no equipment foundation is required, and it can be used after connecting to the power supply. The fineness of the pulverized material is controlled by the distance between the double rollers. The smaller the distance, the finer the fineness and the lower the output. When working, if the feeding is more uniform, the output will be relatively improved.

The cage pulverizer itself is designed to meet different requirements, so when the machine needs to be moved, the cage pulverizer can also be moved. .

After the installation and commissioning of the cage mill crusher, the staff must carefully read the instruction manual of the entire machine before officially starting the production work, understand the structure principle of the cage mill crusher, and be familiar with the performance and operation requirements of the crusher. To operate according to the requirements, this will help to prolong the service life of the whole machine.

What are the components of the cage mill crusher?

A photo of a cage mill crusher

The cage mill is mainly composed of two cages that rotate in opposite directions, so it is generally called a double-rotor cage mill. Each cage has a steel disc fixed on the rotating hub, and two or three rings of steel rods are fixed on each disc. The steel rods are arranged in concentric circles and are perpendicular to the disc. The other end of each ring of steel rods is fixed by a steel ring to increase its strength, and each ring of steel rods on the two steel disks is distributed alternately.

Each cage is installed on its own mandrel through the hub, and the mandrel is supported by the bearing seat respectively. The two shafts are not related, but on one axis, each shaft is equipped with a pulley, which is driven by two motors through the belt. Turn the two cages toward each other, and both cages are closed by a metal shell, and the upper part of the shell has a feeding port.

Because the steel bars of the cage mill crusher are the most easily worn, in order to facilitate maintenance and replacement, the machine is equipped with a device that facilitates loading and unloading of the cage body. The nut, the hand wheel at the left end of the rotating screw, and the bearing frame drive the bearing, the shaft and the cage to move horizontally on the base together.

There is also a single-rotor type of cage mill crusher. The machine has only one cage that rotates and the other cage is fixed. Compared with the double-rotor cage type cage mill crusher, the single-rotor has one less shaft and related transmission. Therefore, the overall dimensions are relatively small and the productivity is low, but the unit price of the machine is also relatively low.

The steel bar is the main working part of the cage mill crusher, and it is also a wearing part. Generally, it can only work for 400 to 800 hours. The diameter of the steel bar is generally about 3 cm. When the wear exceeds 3/4, it should be replaced immediately or Repair, otherwise the cage will run out of balance. Since the wear surface of the steel rod is towards the inside and extremely moving direction, the section of the steel rod can be oval to accommodate uneven wear.

How does a cage mill crusher work?

A photo of a cage mill crusher

When the material enters the central part of the two oppositely rotating cages from the feeding port, the material first falls on the innermost ring of steel rods. Due to the high-speed rotation of the wheels, the material is violently hit by the steel rods and crushed. Then, under the action of centrifugal force, it is thrown to the next circle of steel rods, and the material is hit in the same way on this circle of steel rods, but in the opposite direction.

Go on in this way until the material passes through all the steel bars, and the ground material falls to the lower part of the casing and is discharged. The way that the materials are crushed in the cage mill crusher is that they are crushed by the impact of steel rods, the second is that the materials collide with each other, and the third is that they hit the inner wall of the casing and are crushed.

Advantages, disadvantages and improvement measures of cage mill crusher?

A photo of a cage mill crusher

Advantages: small size, light weight, simple structure, large production capacity, easy to seal, easy to clean, easy to maintain, and have good adaptability to wet materials.

Disadvantages: high working noise, fast wear of equipment parts, short service life of steel bars, in addition, product particle size cannot be adjusted at any time, and materials are prone to over-crushing.


  • The use of wet grinding can significantly reduce noise and reduce excessive grinding
  • The use of surfacing technology for the repair of steel rods and steel rods can achieve better anti-wear effect. If Wu electrode surfacing welding is used, the service life of steel rods can be greatly extended.
  • The use of frequency conversion speed regulation technology to adjust the speed can reduce the situation of excessive crushing, make the machine in the best working condition, and can meet different particle size requirements at the same time
  • Improve the level of manufacturing process, increase the quality level of products, and adopt sound and vibration isolation technology to reduce vibration and noise

Precautions for the use of cage mill crusher?

A photo of a cage mill crusher
  1. When crushing, do not mix materials with high hardness and particle size larger than 6 mm; when processing materials with relatively high moisture content, drying or freeze-drying must be carried out to reduce the moisture content to 100% of 6
  2. Before use, be sure to check whether the fastening screws of the rotating support are fastened and whether the material box is fastened
  3. For the safety of workers, the power supply of the machine must be grounded
  4. In order to ensure the crushing quality, the amount of each charging should be strictly controlled not less than half of the volume of the material box.
  5. During operation, it cannot work continuously for a long time under normal temperature conditions. The working time is controlled within half an hour each time. If the number of processing is large, it should be used at intervals to prevent the bearing from overheating and damage to the motor. Work production requires special refrigeration equipment
  6. When the top cover is open, the switch cannot be activated
  7. After long-term use, if the belt is seriously worn, if the hose is damaged or leaked, it should be replaced in time
  8. After the ultra-fine grinding, the machine should be idle for about half a minute to drain the remaining materials.
  9. After shutdown, open the cover to check whether the parts are damaged, and close the cover after removing the remaining material
  10. If abnormal noise occurs during operation, stop the machine immediately and check the cause
  11. Before starting the cage mill crusher for the first time, check whether there is foreign matter in the crushing chamber, check whether the door of the crushing chamber is locked, and then connect the power after confirmation.
  12. When starting the motor, first let the machine run empty for a few minutes, and then slowly add the material to be pulverized from the feeding tray. The feeding should not be too fast. If the material is stuck in the machine and the motor stops rotating, immediately Turn off the power and empty the material stuck in the machine before continuing to use it
  13. During the use of the cage mill crusher, it is strictly forbidden to open the top cover and stretch your hands into the crushing cavity, and it is strictly forbidden for non-workers to operate it.
  14. Cage grinder is a dry grinder and generally does not process materials that are too wet or contain moisture.
  15. The cage mill crusher adopts an overheat protector. If the motor load is too large, the machine will automatically stop. If you want to continue working, you must press the protector again.
  16. During the working process of the cage mill crusher, the current should not be greater than 15 amperes

Routine maintenance of cage mill crusher?

A photo of a cage mill crusher
  1. The cage mill crusher motor has been adjusted before leaving the factory, do not loose it at will
  2. It is necessary to regularly clean the impurities on the permanent magnet cylinder and the permanent magnet plate of the feeder of the pulverizer
  3. Regularly check the fineness of crushed products
  4. Regularly clean or replace the dust collector bag to ensure that the bag is breathable, and regularly check the working condition of the solenoid valve to see if it can work normally
  5. Regularly check the wear of the wearing parts of the pulverizer to see if it is normal wear and tear
  6. Always pay attention to the vibration of the grinder
  7. When the hammers of the cage mill crusher are seriously worn and need to be replaced, pay attention to weighing to ensure that the weight difference between the two opposite hammers on the two opposite hammer pin shafts is less than 1 gram, and the total weight of the hammers on the two opposite hammer pin shafts is less than 1 gram. The weight difference is less than 2 grams
  8. When the screen of the cage mill crusher is seriously worn and needs to be replaced, pay attention to whether the flatness of the new screen and the size of the screen are reasonable, and whether the installation is in place.
  9. The opening degree of the supplementary air door of the impeller feeder should be adjusted properly
  10. If you find abnormal conditions of large vibration and high noise in the cage mill crusher, stop the machine inspection immediately
  11. The main shaft bearing should have enough lubricating oil every time it is running. After 1800 hours of operation, the bearing box cover should be removed and all the used lubricating oil should be replaced.
  12. When the newly added lubricating oil is ready, add lubricating oil to the area around the roller and bearing ring, and add a certain amount of lubricating oil to the bottom box. Add it as required to avoid adding too much.
  13. When it is found that the output of the cage mill crusher suddenly drops, in addition to the factors of the material, it is necessary to check whether the air supply door is in place, whether the pipeline is leaking, whether the pulse cloth bag is blocked, and whether the solenoid valve and fan are working normally.
A photo of a cage mill crusher

This is all the relevant introduction to the cage mill crusher in this article, did you already know it? If you have any questions that you don’t understand clearly, it doesn’t matter. You can leave a comment below our article. We will reply to everyone’s comments one by one. At the same time, there are other excellent articles on our website. Welcome everyone Continue to browse on our website.

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