Steel worker checking contents of furnace

Steel worker checking contents of furnace

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Credit: HEINE SCHNEEBELI/SCIENCE PHOTO LIBRARY

Caption: Steel production: a worker checking the contents of an electric arc steel-making furnace. Inside the furnace are three graphite electrodes. An arc is struck between them using a three-phase current. This produces temperatures of up to 3,400 Celsius. The worker is checking to ensure that the crust of impurities floating on the molten steel does not form a solid 'cap'. As the furnace uses a massive current, the lance being used by the worker to break up the crust has a substantial earthing cable fitted.

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Keywords: electric arc, electric arc furnace, foundry, furnace, industry, steel, steel making, technology

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