A professional who tends battery of rotary kilns in which hydrated alumina is calcined. Respnsibilities include:

• Moves levers and switches to start kilns and regulate their speed.
• Adjusts controls to regulate temperature, pressure, and rate of flow of oil, gas, air, flue gases, and steam vapor.
• Directs dewaterer operator in regulating flow of hydrated alumina into kilns.
• Turns valves to adjust water supply to cooler coils, kiln trunnions, and water-cooled bearings.
• Inspects kilns, carriages, and drive mechanisms for signs of faulty operation or overheating.
• Keeps log of operational data, such as air temperature and oil or gas pressure.
• May lubricate valves and adjust packing glands to prevent leaks.
• May tend air slides and bucket elevators to convey alumina to storage bins.