A professional who assists recovery operator in operating kiln, ball mill, and conveyor system to recover soluble soda and alumina from waste materials. Respnsibilities include:

• Moves controls to adjust feeds to rotary kiln and ball mill and to regulate operation of dust-collection equipment.
• Reads and records tank levels and slurry and soda ash temperatures.
• Collects and weighs batches of slurry to determine density.
• Measures oxygen content of flue gases, using gas analyzer.
• Keeps operating log.
• Turns valves to supply water to kiln trunnions and water-cooled bearings.
• Lubricates valves and adjusts packing glands to prevent leaks.
• Cleans cooler grates, using handtools.
• Performs other duties as described under helper master title.