1.Kiln Shell Runout

Radial and Facial Runout of Girth Gear of rotary kiln

To obtain extended life of girth gear and pinion the runouts should not exceed the acceptable limits. When the

readings show excessive runouts the girth gear should be re-aligned.

2.Pinion-Girth Gear mesh

Skew of Rollers

Excessive skewing and wrong skewing of rollers may create heavy thrust reaction on the bearings and at times

vibrations which are detrimental to the lining life.

3.Lubrication of kiln Tyre

Life of refractory lining can be improved by:

1)Maintaining shell ovality within closely set limits by correcting tyre clearance

2)Continuously monitoring the tyre creep, temperature of tyre and shell. Cooling the shell when the limits for creep and temperature are critical.

3)Avoiding rapid heating and cooling of kiln

4)Checking and correcting alignment of kiln every 2 years and

5)Maintaining the kiln in a good mechanical condition

①extended lifetime of the refractory lining and elimination of the lining loss caused by the rotary kiln mechanical instability.

②energy savings.

③enhanced lifetime of the shell, tyres, stop-blocks, support rollers, shafts and bearings.

④reduced wear of a gear ring, pinion and drive.

⑤elimination of cracks and overheating of the kiln shell.