Tietjen Hammer mills

Our hammer mills are characterized by their robust design and well-engineered technology. The grinders are often used by our customers for several decades. Tietjen’s focus is on an efficient and economical grinding process. 

Whether coarse or fine grinding, low or high throughputs, our hammer mills cover a wide range of requirements. Typical applications are compound feed, pet food, aqua feed, wood, bioethanol and food.

Find out more about our wide range of equipment:

At the beginning of the process, the material to be ground is fed into the grinding chamber with a feeding or dosing device. The feeding process needs to be as uniform as possible – in terms of quantity per unit of time and per distribution over the width of the grinding chamber. The feeding device is as well used to ensure good ventilation of the hammer mill. This aspiration is necessary for transporting the material to be ground through the hammer mill, keeping the screens free, and cooling the grinding chamber. The aspiration is to be optimally controlled based on the specifications for vacuum and volume flow.

That is why the mill is called Hammer Mill!

In the grinding chamber of the hammer mill, the rotor rotates at high speed. A defined number of removable beaters are attached to the outer circumference of the rotor. These beaters are also called hammers. They are precisely balanced to avoid vibrations. In Tietjen hammer mills, these beaters can be replaced very quickly and easily.
During the process the rotating beaters grip the material to be ground as it enters the beating circle of the rotor. The impact of the beaters achieves the greatest particle size reduction effect. The beaters throw the pieces/particles at the impact plates and screens, where they are further broken by the impact. The ground material remains in the grinding chamber until it is so crushed that it can pass the screens in the grinding chamber.