Job Description:

• 1) Operates water-cooled cupola furnace and related equipment to melt coke, slag, basalt, lime, and silica into molten mineral, and spins molten mineral into mineral wool fibers: Lights fire in furnace to melt charge.

• 2) Reads gauges and turns valves to regulate water and steam pressure.

• 3) Observes melting of ingredients in furnace through porthole, and adjusts airblast on flaming coke bed to control intensity of heat and melting process.

• 4) Activates spinning wheel.

• 5) Removes taphole plug to allow molten stream to flow into water-cooled furnace trough, over high-pressure steam jet and into spinning wheel, to be spun into mineral wool fibers.

• 6) Observes color intensity and flow of molten stream to determine suitability for spinning.

• 7) Adjusts distance of steam ring and spinning wheel from end of trough to control length of spun fibers.

• 8) Scrapes residue slag from trough and spinning wheel, using bar and scraper.