Hammermills are used in various industries and nowadays often play an important role in production facilities. The most hammermill grinders are used in the animal feed industry, but also in other industries, hammermills are found.
Grinding of products like saw dust and wood chips for fuel purpose are nowadays very common. Grinding of tough, fibrous products require stronger and more heavy duty machinery.
For grinding pet foods and aquatic feeds also other demands apply. The ability of fine grinding at high capacity requires hammermill features like large screen area, high tip speeds and a small clearance between hammer and screen. The hammermills of the Champion product line have been designed to suit each specific grinding requirement.
1. The robust design
To withstand the heavy loading on the hammermills while grinding tough and fibrous materials like biomass, the Champion hammermills have been designed with an extremely heavy duty base frame.
The mass of the hammermill absorbs any vibrations while the stiffness of the frame allows a very small clearance between hammer and screen. In combination with the very high hammer tip speeds, this hammermill assures efficient fine grinding under smooth running conditions.
2. Big screem area
The screens encircle the grindingchamber with nearly continous screen surface for maximum grinding action and throughput per cicle. Especially for fine grinding applications like pet foods and aquatic feeds, the champion hammermills have a wide range of screen
areas available. Grinding pet foods through as small as 0,4 mm screens will reduce the effective open area dramaticly. Using the enormous screen area available on the Champion hammermills will optimize the capacity even while grinding extremely fine.
3. High tip speed of Hammermills
A very important parameter of hammermill grinding is the circumferential or tip speed of the hammer. High tip speeds are very suitable for fine grinding. For coarser grinding requirements, lower tip speeds can be applied. Champion hammermills cover a wide range of tip speeds, from low speed for efficient coarse grinding to very high speed for effective fine grinding applications.
4. Hammer to screen clearance
For some applications, the distance between the tip of the hammer and the screen is a very important parameter. For example fine grinding of fibrous products or fatty raw materials like aqua or pet foods require a very low hammer to screen clearance. This low clearance improves the sweeping of the screen and reduces the residence time of the product in the hammermill grinding chamber, preventing heating up and moisture loss of the product. All Champion hammermills have a so called coarse and fine grinding position, which refers to the distance between hammers and screen. Because of the rigidity of the base frame, the
Champion hammermills can maintain a very low hammer to screen clearance in fine grinding position. This, in combination with the high tipspeed, makes the Champion hammermill a true winner.
5. Tear drop circle
The so called tear circle design is characteristic for the Champion hammermills and refers to the shape of the screen. In conventional hammermills, the screen describes a full circle. The centrifugal force is causing the product to follow the screen profile while being dragged forward by the hammers. The higher the speed of the product, the more difficult it is to escape through the screen holes. Also the reduced speed diference between the hitting hammer and the product reduces the grinding efficiency. The tear circle shape actively eliminates this full circle movement. Therefor the product escapes the screen easier and increases the differential speed so that an improved efficiency is created.
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