For the drying chamber of raw mills

Drying chamber elements are used in raw mills, where a pre-drying of the feed material is required. Their function is to pick up the moist feed material and to transport it into the hot gas airflow. This way an effective drying of the material is achieved.

OPTIMAL DRYING OF THE RAW MATERIAL
BY ADAPTING THE ANGLE OF THE SHOVEL TO THE MOISTURE CONTENT OF THE MATERIAL
VARIABLE WEAR PROTECTION DESIGN FOR LONG SERVICE LIFE
ADAPTED TO THE ABRASIVENESS OF THE MATERIAL
LOW-MAINTENANCE OPERATION OF THE DRYING CHAMBER
DUE TO STABLE WELDED CONSTRUCTION

Technical details

  • Variable lifter angle depending on the moisture of the feed material
  • Variable versions of wear protection depending on the abrasiveness of the feed material
  • Bolted fastening for safe and easy installation and dismantling
Trockenkammerelemente

more than 500 
mill shell linings
installed worldwide

Aren´t shell linings just wear parts for mill tube protection?

From our point of view, quite the opposite. The profiling of the shell lining plates creates the movement of the ball charge, which causes the grinding of the material. It is therefore essential for effective grinding in the mill and far more than just a wear part. The exact profile shape has to be defined depending on the ball sizes used, the rotation pace and the mill diameter. And thus, the shell lining has to be adapted to each mill individually.

Why do shell linings have different chromium contents?

The plates of the shell linings must not break during operation. If rough operating conditions are to be expected, a hard facing with a lower chromium content should be used. The chromium content often influences the service life of the hard facing, but not always. The ideal selection of the casting material is part of the standard of our machine and plant design. The design depends on the individual application conditions.

What is the best fastening system for the shell lining?

Any hole on the mill shell weakens the shell structure and is a potential leakage point. In addition, noise emission during operation is increased. Nevertheless, each type of fastening has its justification.

For coarse grinding in the first chamber, we prefer screwed solutions for DIN plates to ensure maximum availability and operational reliability. Alternative systems, with few or without screws, are used for fine grinding chambers.

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A story of efficiency

Efficiency in grinding is our heritage and our future.
Since 1925.

Making grinding processes as efficient as possible is a science in itself – one to which we dedicate our entire expertise and spirit of innovation. From the invention of the first MONOBLOC diaphragm to the technical fine-tuning of the separator QDK. How we became what we are today.