Rajashree cement consults Mobil Industrial Lubricant for lubrication practices.
India is the second largest producer of cement in the world after China. However, due to an unfavourable demand-supply scenario, the industry is reeling under the pressure of rising input costs. Today, manufacturers are under pressure due to reducing profits and competition.
High operating temperatures
Rajashree Cement, a unit of Grasim Industries, is an ISO 14001 certified company, with a capacity of 4.0 mtpa. Catering to the residential and commercial segment of the construction industry, the company manufactures white and grey cement, and operates an opencast mine using state-of-the-art technology.
At its facility, the company employed three production lines with integrated cement lines and individual kilns of 166 tonne per hour capacity. The support rollers were typically lubricated by a mineral oil of ISO VG 460 with the bearings running at very high temperatures such as 78-85oC. These high temperatures led to frequent tripping of motors. Due to contamination and oxidation that usually occurs at high temperatures, the lube oils required annual replacement. This combination of factors affected the productivity of the plant.
Faced with the recurring problem of tripping of motors, which in turn affected productivity, the company approached the Mobil Industrial Lubricants (MIL) team, to seek expert advice on best-in-class lubrication and maintenance practices for operating kilns.Following a thorough analysis of the situation, the MIL technical experts recommended that Rajashree Cement should use the new MIL product û the Mobil SHC 639, a polyalphaolefins-based fully synthetic bearing lubricant that demonstrated improved viscometrics at varying high temperatures.
Although switching to Mobil SHC involved a higher cost outlay for the company, the premium paid was negligible when compared to a 2.5 times increase in the oil drain interval and overall reduction in the tripping of the machinery. This improved productivity led to recovery of the overall cost in no time as the extended oil change also enabled the company to achieve considerable savings. SK Gupta, Cement Team Head, Rajashree Cement, said,´The change has been seamless. The MIL product not only enhances the productivity levels of the machine but also provides increased productivity and higher cost efficiency´.
(Communication by the management of the company)