Developments Toward an Intelligent Electric Arc Furnace at - Tenova

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1135.00 1130.00 1125.00 1120.00 1115.00 1110.00 1105.00 1100.00 1095.00 31.00 30.00 29.00 28.00 27.00 26.00 25.00 24.00 1109.23 1108.82 1108.02 Oct-05 Nov-05 Dec-05 Jan-06 EFSOP Evaluation Period, Feb 20 - Mar 19, 2006 26.68 Figure 7: Oxygen Consumption, scf / inventory cast ton 26.77 27.18 Oct-05 Nov-05 Dec-05 Jan-06 EFSOP Evaluation Period, Feb 20 - Mar 19, 2006 1131.88 Figure 8: Injected Carbon (Carbon Jets and Door Lance) Consumption, lb / inventory cast ton 28.21 1124.00 30.57
Average consumptions of oxygen, methane, electricity and carbon have been calculated by taking the sum of consumption over the period under investigation and dividing through by the total inventory cast tons of steel produced over the same period. This analysis reveals that the average electrical energy, natural gas and oxygen specific consumption were reduced, by 9.23 kWh, 9.15 scf and 7.87 scf per ton inventory cast, respectively, during the EFSOP ® evaluation period compared to January 2006. Carbon specific consumptions reported in the plant heat summaries show an increase in the specific carbon consumption. It was expected that average carbon consumption should have decreased as setpoints and timing were adjusted specifically to reduce overall carbon usage. Instead, the specific carbon consumption was noted to increase during the evaluation period as indicated in Figure 8. The reason for the increase was due to operator override for adjustment of slag quality. 92.50 92.00 91.50 91.00 90.50 90.00 91.08 90.97 91.00 Oct-05 Nov-05 Dec-05 Jan-06 EFSOP Evaluation Period, Feb 20 - Mar 19, 2006 91.83 Figure 9: Yield, inventory cast ton / total metallic charge, % 92.33
Page 1 and 2: Developments towards an Intelligent
Page 3 and 4: A patented, water-cooled sampling p
Page 5 and 6: Figure 3: Sample Heat Chemistry Wat
Page 7: 395.00 390.00 385.00 380.00 375.00
Page 11 and 12: Yield (inventory cast ton per total
Page 13 and 14: 2.00 1.00 0.00 -1.00 -2.00 -3.00 -4
Page 15 and 16: Figure 16 is a plot of a partial en
Page 17: Efficiency of burners and fixed-wal

Developments Toward an Intelligent Electric Arc Furnace at - Tenova

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