Tuesday, June 29, 2004

Steel, Variations

In order to lower power consumption, scrap can be preheated in both batch and continuous processes, often utilizing the heat of furnace off-gases. Scrap preheating to 500� C (930� F) cuts power consumption by 40 to 50 kilowatt-hours per ton, and decreases tap-to-tap time and electrode consumption. Sometimes scrap is preheated inside the EAF by oxyfuel burners, but this requires a large

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