NCB 's Services at a glance
Project & Industrial ActivitiesSee More...
News & Events
Steps for Online Payment through SB CollectRead More
Announcement – World’s most awaited biennale on Cement, Concrete and Building Materials, 05-08 December 2017, New Delhi, India
E-Registration E-Registration Seminar Bulletin 1 Bulletin 1 Click to know more about 15th NCBRead More
NCB Campus - Pics NCB Campus - VideoRead More
NCB CRMs of Coal NCB has developed two new CRMs ofRead More
NCB Proficiency Testing SchemeRead More
CCE Training Brochure NCB Training Calendar 2017-18 NCB Overseas Training Brochure Forthcoming TrainingRead More
Investigations on kiln shell corrosion
Corrosion of kiln shell is influenced by a number of factors such as composition of the metallic shell and its environment, temperature of the shell, cleanliness and roughness of the shell surface and its contact with other materials, oxidizing/reducing conditions, improper combustion of coal, etc. The corrosion phenomenon takes place mainly due to the presence of sulphates and chlorides of alkalis and calcium at high temperature in the cement kiln. The role of refractories in cement kiln is primarily to protect the steel shell from the direct attack of deleterious gases and clinker melt and to reduce the shell temperature so that steel of the shell does not loose its properties. The reduction in shell temperature also leads to energy conservation besides providing workable conditions near kiln shell.