Alignment of a Rotary Kiln Neck

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SUMMARY

The discussion centers on addressing the wobbling issue of a rotary kiln neck, which is currently experiencing a 70 mm deviation due to overheating of the kiln shell. The proposed solution involves relocating the kiln neck to align with its centerline, thereby eliminating the wobble. The user seeks guidance on measurement procedures to determine the optimal position for the neck. An alternative solution of cutting or replacing the overheated kiln shell is acknowledged but deemed more complex and costly.

PREREQUISITES
  • Understanding of rotary kiln mechanics
  • Knowledge of kiln alignment techniques
  • Familiarity with thermal expansion effects on kiln components
  • Experience with precision measurement tools
NEXT STEPS
  • Research rotary kiln alignment procedures
  • Learn about thermal expansion and its impact on kiln operations
  • Explore measurement techniques for kiln components
  • Investigate cost-effective solutions for kiln maintenance
USEFUL FOR

Mechanical engineers, kiln operators, maintenance technicians, and anyone involved in the operation and maintenance of rotary kilns will benefit from this discussion.

Luiz Cavatte
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Hi,
i´d like to ask support to solve the following problem:
One of my customers has an horizontal rotary kiln, equipped with riding rings and carryings rollers. Due to some overheating of the kiln shell, nowadays the whole kiln and the kiln neck is wobbling about 70 mm (+-35 mm) around the kiln discharge and this shell wobbling is destroying the sealing door around the kiln neck.
My idea is then to cut only the kiln neck and relocate it so that it would rotate according to its own centerline, therefore eliminating the wobbling on the neck, which comes from the kiln shell. I would like to ask the procedure (what to measure, how to measure, etc) to find out the position where the neck wouldn´t be wobbling anymore.

Find attached a skecth about the situation.

The other way to solve the problem would be to cut/replace part of the overheated kiln shell, in order to eliminate the wobbling in the whole shell. But this is much more expensive and complex.

Thanks a lot if you can help me!
 

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