![]() ![]() ![]() In the 19th century, a number of people had employed an electric arc to melt iron. History Stassano furnace exhibited at the Museo della Scienza e della Tecnologia "Leonardo da Vinci", Milan In electric arc furnaces, the charged material (the material entered into the furnace for heating, not to be confused with electric charge) is directly exposed to an electric arc, and the current from the furnace terminals passes through the charged material.Īrc furnaces differ from induction furnaces, in which the charge is heated instead by eddy currents. Industrial electric arc furnace temperatures can reach 1,800 ☌ (3,300 ☏), while laboratory units can exceed 3,000 ☌ (5,400 ☏). Arc furnaces used in research laboratories and by dentists may have a capacity of only a few dozen grams. ![]() Industrial arc furnaces range in size from small units of approximately one-tonne capacity (used in foundries for producing cast iron products) up to about 400-tonne units used for secondary steelmaking. Type of furnace An electric arc furnace (the large cylinder) being tapped Rendering of exterior and interior of an electric arc furnace.Īn electric arc furnace ( EAF) is a furnace that heats material by means of an electric arc. ![]()
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