Rotary kiln maintenance

rotary kilns play an important role in every processing system and thus, ensuring that they are operating optimally and efficiently should be of utmost importance to every company. When the rotary kiln is properly maintained and serviced, the company enjoys high productivity due to the little downtime as well as increased profitability as a result of the reduced repair costs. Furthermore, a well maintained and serviced kiln will last longer and thus, help the company save money that could have been used to replace the kiln. Nevertheless, due to the effects of the high heat and process reaction, your kiln will be at a greater risk of failure and thus, you must keep checking the wear points to detect the failure at the earliest time possible.

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Key Kiln Points that you should always check for wear

Refractory degradation

The rotary kiln heavily depends on the refractory liner to maintain the desired temperature and operate efficiently. The refractory also protects the shell of the kiln from the effects of the high temperatures and thus, it is important to ensure that it is in perfect condition at all times. Sadly, the refractory liners degrade over time losing the efficiency. In other times, a hard material build up can find its way to the kiln and damage the refractory. To mitigate the problems, you should hire a highly experienced rotary kiln maintenance expert to recognise when the maintenance is needed.

Burner Maintenance

Although most rotary kiln manufacturers use high-quality burners with proven reliability, issues can still occur affecting the efficiency or even the productivity of the kiln. In most occasions, parts such as the burner cone, sensors, and the burner nozzle may require replacement for the kiln to continue operating as designed. It is also important to keep checking the market as the burner technology is constantly changing resulting in new burners with a greater level of efficiency.

Drum Misalignment

A misaligned drum puts all components of the kiln at a risk of premature wear and thus, you must always check to ensure that the drum is properly aligned. A misaligned drum can cause damage to parts such as the inlet breechings, discharge breechings, trunnion wheels and thrust rollers, which can cause extensive downtime. An experienced expert will be able to check whether your drum is properly aligned and thus, prevent wear from occurring to other kiln components.


During the rotary kiln maintenance process, it is also important to check for worn out breeching seals as well as carry general preventive maintenance that include changing the gear box oil, lubricating bearings, and rechecking backlash among others.