rotary kiln maintenance

A rotary kiln is a processing device that is used in calcination, that is, elevating materials to extreme temperatures continuously. A rotary kiln is cylindrically shaped and normally designed in an inclined position such that material is placed from the raised end and high temperatures fed on the other end. The kiln rotates and in the process, material go down purposefully mixing and stirring. The major components of a rotary kiln are the refractory lining, heat exchangers, the shell, support tyres, rollers and drive gears. Due to the nature of their work, rotary kiln maintenance should be highly regarded.

Learn more about rotary kiln maintenance


What is it used for?


There are two types of rotary kilns that is, direct and indirect fire. Both types are mainly used across agriculture, mineral and major material processing industries. For one, cement industries use this device to process calcium carbonate into clinker, a material used in the final cement production. Gypsum also utilizes the principle of calcination especially in removing chemical water from its ground state. Recycling companies also use custom application of kilns especially in reclaiming nickel. Electronic components that would otherwise go to waste and contains nickel can be recycled. Kilns utilizes the high temperatures to recover these valuable mineral.


Why would a rotary kiln need maintenance?


A rotary kiln is a high performing equipment and it definitely needs regular maintenance and inspection to ensure round the clock operation. Be sure to check the refractory for cracks. Repair it before it is too late. The refractory experiences extreme heat and it may go dry and in the process start cracking. Secondly, the burner should be assessed for wear with special attention to the burner nozzle, and sensors. Repairs should be done through replacement. Maintenance and inspection should also be done on the seal for deformation. Damaged seals may allow air leak into the heat chamber and it may interfere with the reaction. Moreover, check for correct alignment of the rotary kiln and if there is misalignment, check the tyres, girth and roller for wear. Conduct necessary replacements and repairs.


Where are rotary kilns used?


Rotary kilns are used in various industries. For one, it is common in cement manufacturing. Secondly, recycling companies use kilns in recovery of nickel from junk electronics. In agriculture, agro-chemicals are produced using calcination especially in powder processing. Pharmaceuticals also utilize high temperatures to make special powdered drugs. Some incinerators also use kilns to burns completely materials. Many industries are adopting other forms of kilns especially the small scale version for various medium processes.