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1 SURVEY OF CHEMICAL EMISSIONS Table 50. Fuel Savings for Energy-Efficient Technologies Applied to Integrated Steel Production in the U.S. Sinter plant heat recovery 0.12 Reduction 0 Increasing bed depth 0.02 Improved process control 0.01 Use of waste fuels in sinter plant 0.04 Coal moisture control 0.09 Programmed heating 0.05 Variable speed drive coke oven gas compressors 0 Coke dry quenching 0.37 Pulverized coal injection to 130 kg/thm 0.69 Pulverized coal injection to 225 kg/thm 0.51 Injection of natural gas to 140 kg/thm 0.8 Hot blast stove automation 0.33 Recuperator hot blast stove 0.07 Improved blast furnace control systems 0.36 BOF gas + sensible heat recovery 0.92 Variable speed drive on ventilation fans 0 Adopt continuous casting 0.24 Efficient ladle pre-heating 0.02 Thin slab casting 3.13 Hot charging 0.52 Process control in hot strip mill 0.26 Recuperative burners 0.61 Insulation of furnaces 0.14 Controlling oxygen levels and VSDs on combustion air fans 0.29 Waste heat recovery (cooling water) 0.03 Heat recovery on the annealing line 0.17 Reduced steam use (pickling line) 0.11 Preventive maintenance 0.43 Energy monitoring and management system 0.11 Cogeneration 0.03 Variable speed drive, flue gas control, pumps, fans 0 Source: Table 4 of Worrell report [17]. Table 51 lists the same options for secondary steel production. To keep within the scope of this report, only fuel savings have been listed, since this will directly reflect the energy savings for the plant. Option Coke Making Iron Making - Blast Furnace Recovery of Blast Furnace Gas 0.06 Steelmaking - Basic Oxygen Furnace Integrated Casting Integrated Cold Rolling and Finishing 48 Fuel Savings (GJ/ton)PDF Image | Analysis for Recovering Energy from Industrial Waste Heat
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