Drives systems for the mills in cement works

In a cement works the mills for producing raw meal and grinding clinker are the most energy-intensive machines in the cement manufacturing process. Depending on the types of cement produced the grinding processes account for 50 to 60% of the process engineering requirement for electrical energy. Further development of the roller grinding mill and the industrial introduction of high pressure comminution in the mid 80s have now achieved energy savings in the grinding process of between 30 and 50%. The gear unit manufacturers have also played a great part in this trend; in the past they were faced with the challenge of providing gear units with substantially higher ratings and at the same time had to find new drive solutions to fulfil the increased demands on availability and service life. A report is given. below of the modern drive solutions for driving tube mills, roller grinding mills, high-pressure grinding rolls and ring-roller mills. Some information is also provided about a diagnostic system which, through access to measurement data thanks to the current level of development in data communication, can analyze a gear unit in any geographical location on the earth, and eliminate expensive and time-consuming tours of inspection.