Rotary kiln alignment
All rotary kilns have many rotation surfaces working together that has to be set with high geometrical precision. Any damage of working components will accelerate very fast if the geometry is not maintained properly. The alignment inspections of all components are a very good solution to find the problems before it starts. The maintenance routine should be performed regularly daily, weekly, monthly and yearly. Mechanical kiln inspecti...
When the support rollers are not in a correct geometrical position the rotating load is different for each pear, each roller. This condition has strong influence over kiln service life. Misalignment causes the same overloading stress condition like crank in the shell. The difference is that the bend of shell creates overload stress once per revolution of kiln, not correct position of kiln axis has a negative impact on a permanent basis....
Rotary kiln shell tends to heat damage. The “hot spot” formation can appear every time when refractory fall at some part of shell segment. Sometimes it looks like red spot on shell surface. The size is from couple of centimeters up to much larger area. Also some other symptoms like blisters on the surface is a very important warning that should never be ignored. To monitor thermal distribution of kiln shell the Cement Plants crew ge...
Based on our experience we can distinguish six different concepts of rotary kiln maintenance. Aligning and inspecting the kiln with these knowledge the user can ensure long time of operation – unexpected stoppages reduced to minimum. Ignoring these 6 issues equals more damages of rotary equipment. The components like support rollers are very often ignored by the users of rotary kiln. It is not possible to operate kiln without taking...
Alignment measurement taken during normal rotary kiln operation (hot kiln alignment) became industry standard these days. There are many different type of services and different methods of alignment/measurement available. Some of them use the movement of the machinery as an advantage other treat kiln’s operation as an obstacle. From maintenance point of view alignment starts with the kiln erection. None of the manufacturers (vendors) ...
Main rotary kiln inspection starts with the shell. Then it proceeds to each support, sealing and drive system (girth gear, pinion, coupling, gearbox, redactor, lubrication etc.). This basic (visual) inspection should be scheduled daily. All changes from previous control procedure should be recorded and analyzed by experienced diagnostician. Three main areas of stress that you should focus during kiln shell inspection is: cracks, thermal...