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CFD Modelling of Blast Furnace Blast Pipe-Tuyere-Raceway Region to Predict Relative Coal Burnout with Natural Gas Injection and Double-Lance Design
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CFD Modelling of Blast Furnace Blast Pipe-Tuyere-Raceway Region to Predict Relative Coal Burnout with Natural Gas Injection and Double-Lance Design
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Journal Article
CFD Modelling of Blast Furnace Blast Pipe-Tuyere-Raceway Region to Predict Relative Coal Burnout with Natural Gas Injection and Double-Lance Design
2023
Overview
Co-injection of natural gas (NG) with pulverized coal (PC) is carried out in blast furnace to increase the coal burnout; however, it has major challenges such as excess heat load on tuyere, lance overheating and competition between coal volatile matter and NG for available oxygen. A 3D computational fluid dynamics model of the blast pipe-tuyere-raceway region is developed to study the effects of: (1) NG and PC injection (PCI) through the co-axial lance and the subsequent oxygen enrichment on coal burnout and (2) relative positioning of NG and PCI lances in a double-lance design on coal burnout and localized temperature rise on PC lance. In the co-axial lance case, the use of NG as a cooling gas instead of oxygen decreases burnout from 54 to 43%. In double-lance design, positioning NG lance prior to PC lance results in relatively higher % burnout than the reverse configuration and does not lead to the overheating on PC lance.
Publisher
Springer India,Springer Nature B.V
Subject
/ Burnout
/ Chemistry and Materials Science
/ Coal
/ Computational fluid dynamics
/ Design
/ Heat
/ Lances
/ Pipes
/ Tuyeres
