Experts in Cement Milling--Advanced Process Control boosts Energy Efficiency and Product Quality

摘要

At the Sudbayerisches Portland-Zementwerk in Rohrdorf/Germany, raw materials extracted from nearby quarries are stored in a blending bed hall and then ground into "raw meal" in a raw mill. In the rotary kiln the raw meal is then burned to create Portland cement clinker, the basic material for all types of cement. The next step is to grind the clinker in a ball mill equipped with steel balls of varying sizes. Depending on the type of cement, other materials such as granulated blast furnace slag can be added at the grinding stage. The Rohrdorf plant has four ball mills with a total capacity of around 270 tonnes per hour.