Character Art Exchange

Hammer mill working principle


The hammer mill mainly relies on the impact energy to complete the crushing material operation. When the hammer mill is working, the motor drives the rotor to rotate at a high speed, and the material enters the crusher chamber evenly. The high-speed rotary hammer impacts and shears the torn material, causing the material to be broken. At the same time, the gravity of the material itself causes the material to The high-speed rotating hammer head rushes toward the baffle and the screen strip in the frame body. The material larger than the size of the mesh hole is retained on the sieve plate and continues to be struck and ground by the hammer until it is broken to the required discharge particle size and finally discharged through the sieve plate. .
Advantages and disadvantages of hammer mill
1. The advantages of Hammer mill are: large crushing ratio (generally 10-25, high up to 50), high production capacity, uniform product, less powder phenomenon, low energy consumption per unit product, simple structure and light equipment quality. , easy to operate and maintain. Hammer mill series products are suitable for crushing various medium hardness and brittle materials, such as limestone, coal, salt, white Asia, gypsum, alum, brick, tile, coal gangue and so on. The compressive strength of the material to be crushed does not exceed 150 MPa. The machine is mainly used in cement, coal preparation, power generation, building materials and compound fertilizer industries. It can crush raw materials of different sizes into uniform particles, which is beneficial to the next process, reliable mechanical structure, high production efficiency and good applicability.
2. The shortcomings of the hammer mill are: the hammer head and the purlin screen are worn quickly, and the maintenance and balance time is long. When the hard material is broken, the wear is faster; when the sticky material is broken, it is easy to block the screen slit. This is likely to cause downtime (the moisture content of the material should not exceed 10%). When smashing hard objects, the hammer head and the lining plate are worn out and consume a lot of metal materials. Frequent replacement of the wearable parts requires more inspection time. When the wet and damper materials are broken, the purlins are easily blocked and the production capacity is reduced.

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