Abstract: Within the known Müller-Kühne process and a corresponding installation, a utilization of a great variety of residual materials can be achieved with optimum process control, both in regard to the production of a raw powder and the fuel, whereby this is made possible in particular in that the raw powder components and the fuel components also are, with respect to the residual materials being used, stored separately, conditioned, and then mixed according to the formulation under strict monitoring. The flue gas is used for preheating the raw powder by adding the cold raw powder to it. This simultaneously removes sticky components from the flue gas. The raw powder preheated in this manner, and also the raw powder or dust recovered in subsequent dedusters are returned to the rotary drum kiln, whereby the solid and other fuels are used and burned with a mutually supportive flame at the opposite end of the rotary drum kiln.

Abstract: A method of removing sulphur dioxide from exhaust gases generated in the production of cement wherein cement raw meal is preheated, ground, and burned in a kiln to form cement clinker which subsequently is cooled and ground. Grinding of the clinker is performed in the presence of preheater exhaust gases containing sulphur dioxide, the cement particles absorbing sulphur dioxide from such exhaust gases.