A pre-crushed grain reaches the secondary crusher and is broken into a grain band with a high proportion of coarse grain. The concrete is completely separated from the reinforcing steel. Thanks to the gentle process, there is little wear and tear and dust exposure is kept to a minimum. Grain sizes of 0-63 mm can be achieved economically.
Due to the special tool contour and the synchronized roller rotation, the crushing tools penetrate the feed material in such a way that the foreign matter is effectively exposed by pressure and shearing. The steel content can be separated with a high degree of purity using a steel separator.
An important feature for the crushed material is the high proportion of valuable grain. A target grain size of 0-63 mm is typical for secondary size reduction. In order to achieve the highest possible proportion of valuable product, it is manufactured in a circular process.
Foreign substances such as wood or plastic are not shredded any further and can then be quickly removed from the material flow using common separation processes. In addition, the foreign matter is not processed into undesired fine fractions, which would contaminate the crushed material to a greater extent.