Abstract: In order to solve the lubrication problem of supporting wheel bushing of rotary kiln under harsh working conditions, a special lubricant was developed. In this study, polyalphaolefin was selected as the base oil, and the formula of supporting wheel bushing lubricant was obtained through the selection and compounding of viscosity index improver, extreme pressure antiwear agent, oiliness agent, antioxidant and solid additive. The developed products have excellent adhesion and viscosity temperature performance, good extreme pressure performance and oxidation resistance. Compared with the competitive products sold abroad, they have more excellent low-temperature performance and bearing capacity. After two years of practical use, the developed product can meet the lubrication requirements of the supporting wheel bushing of rotary kiln in cement plant, and solve the problem of the temperature rise of the bearing bush of the original oil under the low speed and heavy load conditions.

Key words: rotary kiln, supporting wheel bushing, lubricant, polyisobutylene, poly-alpha-olefins