Rotary kilns

Rotary kilns: Traditional design. Technology at its toughest. Utmost flexibility.

The rotary kilns offer a robust, reliable design that delivers the benefits of low resource consumption and high operational reliability. Additionally, the low specific operating and investment costs for our rotary kilns are an additional advantage for our customers.

Rotary kilns are used for burning, calcining, reducing, roasting, volatilizing or sintering a very broad range of materials. In the mineral industry they are deployed to process a variety of minerals, such as nickel, iron, zinc, vanadium, expanded clay, etc.

Operational benefits

Our rotary kilns are designed to operate reliably in the various processes with high throughputs, daily outputs of up to 4,000 metric tons, and high operational temperatures of up to 1800 °C. Our rotary kilns reliably fulfill our customers’ requirements and are capable of intermittent mechanical and process overloads during normal operation. The directly fired rotary kiln can be designed for a wet or dry process and combined with different preheater systems, e.g. cyclone or shaft preheaters, to achieve high productivity while simultaneously reducing energy consumption. Our portfolio includes large-diameter rotary kilns on two, three, four or more supporting roller stations.

To counterbalance the up- and downhill movement forces of the inclined kiln, each of our kilns is equipped with a hydraulic thruster to ensure uniform wear of tires and rollers with regular enforced kiln movements. The rotary kilns are driven with a girth gear, single- or double-pinion drive.

Standardized or customized kilns

In order to ensure the best possible results we offer standardized kiln type series (up to 6.2 x 135 m) as well as individually designed mineral kilns with special equipment for differing applications and requirements in the mineral industry.

Moreover, various sealing systems for the kiln inlet and outlet side are available for economical production processes and to avoid emissions and false air intake. In combination with a rotary screen, jacket fans, furnace installations, accumulating rings and bucket wheel locks, our rotary kilns can be individually upgraded for various applications and requirements in order to provide our customers with the optimal solution.

A multitude of innovative process and design details make the rotary kilns the ideal future-proof solution.


Plant for drying and pre-reducing nickel ore in Venezuela