A professional who tends granulator machine that expands blast-furnace slag for use as building or insulating material. Respnsibilities include:

• Signals overhead crane operator to position iron runners that carry slag from furnace to granulator machine.
• Opens gate of furnace to allow slag from furnace to flow onto runners, and turns water, air, and steam valves to spray slag in granulator.
• Positions container under discharge chute of granulator to receive expanded slag, using car puller.
• Starts conveyor that carries expanded slag from granulator to discharge chute.
• Stops equipment and clears slag from runners, granulator, and conveyor, using iron bar.
• Lubricates equipment, using grease gun and oilcan.