A professional who performs any combination of following duties to assist mill operator. Respnsibilities include:

• Feeds raw materials to mill, using conveyor belt.
• Shovels spillage back onto belt.
• Breaks lumps of incoming raw material, using double jack, to facilitate passage through grizzly before entry into crusher.
• Opens hatch and drains slurry from mill, using electric vibrator or shaking screen to sift foreign particles from slurry.
• Places trays of slurry in drying ovens for specified time.
• Dumps dried slurry into drums.
• Moves drums to storage area, using handtruck.
• Lubricates mill and auxiliary equipment.
• Washes ball mills and cleans work area.
• Performs other duties as described under helper master title.