A professional who operates furnace to remove moisture, arsenic, or sulfur from ore. Respnsibilities include:

• Charges top hearth of roaster with ore, regulating rate of charge by means of chute door.
• Determines speed with which roaster is being charged by weighing sample of charge ore obtained over measured interval of time.
• Starts rabbles (automatic rakes) that scrape hearth beds continually and move ore from one hearth to next lower one.
• Regulates draft and temperature of roaster by adjusting dampers and gas pressure.
• Replaces rabble arms by detaching arm from shaft with bar and removing it with hoist.
• Replaces defective rabble teeth.
• Directs workers in removing incrustations from hearth beds.
• Removes samples of roasted ore for laboratory analysis.
• May clean arms and rabbles with scrapers and iron bars.
• May determine oxide content of dried ore by titrating specified amount of flakes and calculating percentage.
• May replace defective parts and clean equipment.