Siemens Aktiengesellschaft

Innomotics Gmbh

Stefan Smits

Kurt Tischler

Norbert Becker

Hans-Ulrich Löffler

Adem Karadeniz

Hans-Ulrich Loeffler

A method for starting a grinding tube with an assigned drive device, wherein during the operation of the grinding tube a grinding mode and a charge release mode can be set such that a particularly reliable monitoring of the state of charge located in the grinding tube is ensured, where the grinding tube is rotated and, at a first rotational angle, a first actual torque is detected, a setpoint torque is calculated for a second, relatively large rotational angle based on the first actual torque, an actually occurring, second actual torque is detected when the second rotational angle is reached, an investigation is performed to determine the difference of the second actual torque from the setpoint torque, and the charge release mode of the grinding tube is set when the second actual torque is within the threshold range, otherwise the grinding tube is operated in the grinding mode.

Method for starting a grinding tube

The method is used to determine the filling level of a loaded mill container (). The container () has a drive torque (M) applied to it by means of a drive (), and causes it to rotate. The drive torque (M) on the drive () is set by means of a predeterminable drive test sequence. A time/rotation speed profile of a rotation speed of the container () which results from the drive test sequence is recorded, and is analyzed. The filling level is determined on the basis of the results of the analysis. The method produces up to date, accurate information, determined during the milling operation, about the filling level of the container ().

Method for determining a refuse filling level

In a method for detaching a charge () which is stuck to the inner wall of a grinding pipe (), the grinding pipe () is rotated in a targeted manner such that the charge () that is stuck is removed from the inner wall of the grinding pipe () as a result of multiple modification of the rotational speed of the grinding pipe () and, optionally, as a result of abrupt braking of the grinding pipe (). Generally speaking, the material-dependent maximum angle of rotation F of the grinding pipe is not exceeded in order to avoid the charge that is stuck from falling in an uncontrolled manner. The invention supercedes labor-intensive and protracted methods for detaching such charges () since the tasks can be carried out by the same motor of the drive device () which is used to drive the grinding pipe () during the grinding process.

Method and devices for detaching a charge stuck to the inner wall of a grinding pipe

Method, control device and drive device for detaching a charge stuck to the inner wall of a grinding pipe

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Hemhofen, Germany

Stefan Smits