Waste Heat Recovery from Blast Furnace Slag by Chemical Reactions
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Blast furnace (BF) slag, which is the main byproduct in the ironmaking process, contains large amounts of sensible heat. To recover the heat, a new waste heat-recovery system—granulating molten BF slag by rotary multinozzles cup atomizer and pyrolyzing printed circuited board with obtained hot BF slag particle—was proposed in this study. The feasibility of the waste heat-recovery system was verified by dry granulation and pyrolyzation experiments. The energy of hot BF slag could be converted to chemical energy through the pyrolysis reaction, and a large amount of combustible gas like CO, H2, C m H n , and CH4 can be generated during the process.
KeywordsBlast Furnace Print Circuit Board Blast Furnace Slag Molten Slag Pyrolysis Reaction
This work was supported by the Fok Ying Tung Education Foundation (Grant 131048) and the Fundamental Research Funds for Chongqing University Postgraduates’ Science and Innovation Fund (Grant CDJZR11130029).
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