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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 17a
SUMMARY:Enhanced performance of BOF hood in steel mills with composite tube technology
DESCRIPTION:Brazil is the largest producer of crude steel in the Americas by BOF process, and many challenges come along with the increasing market demand. In the BOF, a tubular wall hood structure has been showing premature failures related to the overlay welded tube technology in the hood wall. The main root causes were: thermal fatigue at 1800°C, hot spot formation, high heat-affected zone (HAZ) leading to stress cracking susceptibility, carburizing corrosion, and superficial wearing. Based on that, co-extruded tube technology (named composite tube) was the alternative chosen to enhance hood performance without compromising the BOF process. To rises safety and productivity, the composite tube has a 100% metallurgical bond assuring stable expansion, high heat exchange efficiency, better corrosion resistance, and less rough surface finishing. It was highly suggested to many other mills due to similar and existing reported cases.
The paper describes the product co-extruded composite tube and the first successful installation in a tubular wall hood of a BOF.

Keywords: BOF Hood; Co-extruded composite tube; Corrosion
CLASS:PUBLIC
DTSTART:20230615T090000
DTEND:20230615T092000
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