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D APPENDIX D: TECHNOLOGY SOLUTIONS FOR ENERGY RECOVERY single most energy-saving improvement in the process step, making the BOF process a net energy producer. Repressed combustion is very common in integrated steel plants in Europe and Japan as an efficient means of energy recovery, emission control, and dust recycling. Repressed combustion reduces CO and dust emissions and, since the metal content of the dust is high, about 50 percent of the dust can be recycled in the sinter plant or in the steel plant. The amount of gas recovered depends on the hot metal charge in the BOF as the main source of carbon. Assuming a hot metal charge of 1800 lb/ton liquid steel, approximately 2860 cu. ft. of BOF gas can be recovered, accounting for flaring and air leakage into the system. This is equivalent to 607 kBtu/ton. Steam recovery can be up to 120 lb/ton of steel. Assuming a steam recovery of approximately 100 lb/ton, equivalent to 130kBtu/ton, total fuel savings are equivalent to 737 kBtu/ton with increased power consumption of 2 kWh/ton. 132PDF Image | Analysis for Recovering Energy from Industrial Waste Heat
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