What provides the heat in an electric arc furnace?

What provides the heat in an electric arc furnace?

• A. Chemical reactions with fluxes
• B. Gas-fired burner
• C. Induction coils
• D. Three graphite electrodes create an arc that heats scrap metal

Answer: (D)

Heat in an electric arc furnace comes from the electric arc produced by graphite electrodes. When the furnace is powered, an arc forms between the electrode tips and the scrap metal, creating a superhot plasma that transfers energy directly to the metal. This arc heat rapidly melts and heats the charge, making it the primary heat source in an EAF. Fluxes help with slag chemistry and metal refining, but they don’t provide the main heat. Other heating methods, like gas-fired burners or induction coils, are used in different furnace types and do not drive the heating in an arc furnace.

Heat in an electric arc furnace comes from the electric arc produced by graphite electrodes. When the furnace is powered, an arc forms between the electrode tips and the scrap metal, creating a superhot plasma that transfers energy directly to the metal. This arc heat rapidly melts and heats the charge, making it the primary heat source in an EAF. Fluxes help with slag chemistry and metal refining, but they don’t provide the main heat. Other heating methods, like gas-fired burners or induction coils, are used in different furnace types and do not drive the heating in an arc furnace.