Since some years Kreyenborg Plant Technology GmbH & Co. KG consistently focuses on infra-red radiation for the thermal treatment of bulk goods. The material is continuously fed into the integral screw of the rotating drum and distributed evenly through the dryer. The radiation penetrates directly into the material and heats it directly from inside. Thus the concept is extremely energy-efficient. In contrast to conventional techniques considerable savings of time and money may be realised. This technology may be applied with almost all free flowing bulk goods.