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

A technology of driving device and control device, applied in the direction of grain processing, etc., can solve the problem of time-consuming and so on

Inactive Publication Date: 2007-07-04
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Removal of stuck charges is subject to extremely high an

Method used

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

Examples

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Example Embodiment

[0028] Fig. 1 shows a schematic structure of, for example, a tube mill for grinding ore. The tube mill has a grinding tube 1 connected to a driving device 2. In addition, there is a control device 3 that sends a control or adjustment signal to the drive device 2. The control device 3 can also receive and process signals, such as measurement signals from the drive device 2 or other components of the tube mill. The grinding tube 1 is preferably formed in a drum shape. The tube mill has a supporting device for grinding the tube 1 which is not shown in detail in the drawing.

[0029] The drive device 2 of the tube mill has at least one electric motor formed, for example, as a ring motor. The electric motor is coupled to a converter not shown in detail. The characteristic of the electric motor as a ring motor is that it can drive the grinding tube 1 without a transmission and thus make the tube mill run particularly durable.

[0030] The drive device 2 is preferably formed as a field-o...

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PUM

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Abstract

The invention relates to a method for detaching a charge (5) which is stuck to the inner wall of a grinding pipe (1), wherein the drive device (2) of the grinding pipe (1) is controlled by a control device (3) for targeted removal of the charge (5) that is stuck. The grinding pipe (1) is rotated in a targeted manner such that the charge (5) that is stuck is removed from the inner wall of the grinding pipe (1) as a result of multiple modification of the rotational speed of the grinding pipe (1) and, optionally, as a result of abrupt braking of the grinding pipe (1). 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 labour-intensive and protracted methods for detaching such charges (5) since the tasks can be carried out by the same motor of the drive device (2) which is used to drive the grinding pipe (1) during the grinding process.

Description

technical field [0001] The invention relates to a method for removing adhering material from the inner wall of a grinding tube, in particular of a tube mill, a control device for a grinding tube drive and a grinding tube drive. Background technique [0002] Tube mills are mainly used for grinding materials such as ores. It is not uncommon for the operation of the tube mill to be interrupted for a longer period of time and the tube mill to be shut down. This is the case, for example, for maintenance reasons. During tube mill shutdown, material within the grinding tube of the tube mill may solidify and stick to the inner wall of the grinding tube. This cohesive cured material attached to the inner wall of the grinding tube is referred to as cohesive charges or also "frozen charges". If the tube mill is restarted after a prolonged shutdown, there is the risk that the adhered charge falls off the grinding tube at a great height, falls and causes serious damage to the tube mil...

Claims

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Application Information

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IPC IPC(8): B02C17/18B02C17/24B02C23/04B02C25/00
CPCB02C23/04B02C17/24B02C17/1805B02C25/00Y10T29/49817Y10T29/53687
Inventor 诺伯特·贝克斯蒂芬·斯米茨库尔特·蒂施勒
Owner SIEMENS AG
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