The Fields of Application

Reversible hammer mills are mainly used in the sectors of raw materials and the iron and steel industries for primary and secondary crushing of various materials.

The Feed Materials

Hard coal and lignite in coaling plants, coking coal for the iron and steel industry, limestone, gypsum, pet coke, iron ore as well as other related minerals of soft to medium-hard consistency and salts.

The Mode of Operation

When the feed material is inserted into the crushing radius of the rotor it is grasped by the beater heads, thrown against the impact wall and gradually crushed. Secondary crushing is then carried out in the lower section between the rotor and impact wall. 
The flexible suspension of the beater arms on the rotor ensures that the Reversible Hammer Mills are sturdy enough against the intrusion of extremely hard foreign particles. As the beater heads are subject to wear, they are of course exchangeable. Adjustment of the impact wall relative to the crushing radius of the rotor (width of gap) and rotor speed (m/s) are the major factors in determining the rate of reduction and the final grain size.

The Special Characteristics

The rotor is forged in one piece and has been drilled in a special jig. The finely balanced design of the opposing beater arms and beater heads ensures balanced running. The beater arms are made of high-quality steel and are easy to exchange.

The beater heads are manufactured as chrome-molybdenum alloy steel or compound casting.

The reversible hammer mills are designed in such a way that they can be driven at both continuous or variable rotor speeds. Inspection flaps and hinged housings are provided to facilitate easy maintenance.

The Advantages

  • High and constant capacity
  • Long Lifetime
  • Board range of applications
  • Low susceptibility to breakdowns
  • Easy replacement of worn and spare parts

High reduction ratio