The mill's biggest challenge?
As the largest rotating equipment structures in the world, rotary kilns operate with perhaps the biggest challenges.
Cement clinker and iron ore pellets produced by kilns are critical to production. Yet kiln maintenance is usually time-based, so hard-driven components must last until the next interval.
That's not so easy when even the kiln's outer shell can reach 400 °C - enough to reduce lubricant viscosity inside bearings and eventually cause failures. Tumbling loads, dust and outdoor elements can lead to shaft misalignment, bearing contamination and additional failures.