The kiln support roller system is an important part of the whole rotary kiln system. It supports rotary kiln’s movement, and also provides the upward thrust required by the rotary kiln.

This paper makes a brief introduction to the problems and maintenance experience found in the operation process of kiln support roller:

1.Selection of lubricating oil for roller bearing set
Good lubrication for support roller bearing set is the key to the safe operation. The support roller runs under high load, high temperature, poor working conditions, and the roller has a certain movement up and down in the axial direction. According to the characteristics, lubricating oil should be featured with anti wear, oxidation, corrosion resistance, high temperature resistance, emulsification resistance, and also with viscosity coefficient, which can make good oil film from on the contact surface between support roller shaft and the supporting roller shaft bushing.

2.Angle between support roller and kiln tyre
A rotary kiln cylinder are generally pushed by the hydraulic thrust roller device, and moves down depending on the downward force generated by the tilting of the cylinder. Therefore, the center line of the support roller and the central line of the cylinder body should be kept parallel, and the connection between the axis of the two supporting roller and the axis of the rotary kiln is the best to be an equilateral triangle, so as to reduce the resistance produced by the upper and lower movements of the cylinder.