A professional who assists blast-furnace keeper in tapping blast furnace. Respnsibilities include:

• Breaks slag from casting equipment, such as slag runners, iron troughs, gates, and dams, using bars, hammers, and shovels.
• Relines runners, troughs, gates, and dams with refractory materials, such as fireclay, sand, and coal dust.
• Cleans and loads clay gun for plugging taphole.
• Removes obstructions in runners during casting operations, using tong bar.
• Obtains sample of molten iron during cast, with spoon and pours sample into test mold.
• Assists in changing tuyeres, coolers, cinder notches, and blowpipes on blast furnace, using handtools.
• Cleans dust, debris, and solidified metal from blast furnace and casting area.
• Performs other duties as described under helper master title.