Hammer Mill Standard Operating Procedures


Hammer crusher is designed in innovative structure and with high advanced technology. The quality and know-how inherent in hammer mills are backed by over a century of experience in the feed milling and other related industries around the world.

The requirements of grinding a large number of special products have led to the development of the hammer mills, which are adaptable to almost any purpose, whether coarse or fine grinding is required, e.g. raw materials for the production of animal feed, fish feed, petfood and biomass products, such as wood flakes, straw and other surplus materials.

  • 1. High and constant capacity
  • 2. Low space requirement
  • 3. High machine availability
  • 4. Long lifetime
  • 5. Easy replacement of wear and spare parts through hydraulic opening device
  • 6. Broad range of applications
  • 7. High reduction ratio

hammer mill operation and crushing

Material is fed into the mill’s chamber typically by gravity.

The material is struck by ganged hammers (generally rectangular pieces of hardened steel) which are attached to a shaft which rotates at a high speed inside the chamber. The material is crushed or shattered by the repeated hammer impacts, collisions with the walls of the grinding chamber as well as particle on particle impacts.

Perforated metal screens, or bar grates covering the discharge opening of the mill retain coarse materials for further grinding while allowing properly sized materials to pass as finished product.

Hard, heavy materials such as glass, stone or metals exit the mill via gravity. Pneumatic suction us used to assist in the discharge of lighter materials such as wood, paper or other low bulk density products.

Varying the screen size, shaft speed or hammer configuration can dramatically alter the finished size of the product being ground. For example, faster speed, a smaller screen, and more hammers result in a finer end product. Each component can be changed individually or in any combination to produce the precise grind required. All of this is determined by taking advantage of our free test grinding service.

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