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Wear of MgO-C refractory for the BOF stirring plug with multiple tuyeres and the tuyere interaction
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
1996 (English)In: 79th Steelmaking Conference proceedings: Pittsburgh meeting, March 24 - 27, 1996, Pittsburgh, Pa: Iron and Steel Society , 1996, 439-450 p.Conference paper (Refereed)
Abstract [en]

Wearing effects of tuyere interaction on MgO-C refractory for the BOF stirring plug with multiple tuyeres have been studied by performing single-tuyere and double-tuyere wear tests using molten steel of 1550 °C and Ar gas. Two tuyeres were set in the refractory with different distance between their centres for the double-tuyere wear tests to simulate service conditions for the multiple-tuyere plugs. The results show that the wear is severe with a tuyere distance of 12 mm and 10 Nl/min Ar flowrate for each tuyere due to an overlap of the high wear zone around the tuyeres. The wear is reduced to the level of wear for the single tuyere when the tuyere distance is increased to 24 mm or more. With a tuyere distance less than 50 mm, an overlap of the shear zone for the tuyeres occurs giving an elliptic shear wear zone around tuyeres. With a distance of 50 mm for the tuyeres, the interaction effects on the refractory wear disappear. Based on test results and the bubble expansion wear mechanism, methods for estimating, reducing and eliminating mechanical wearing effects of tuyere interaction are discussed and suggested

Place, publisher, year, edition, pages
Pittsburgh, Pa: Iron and Steel Society , 1996. 439-450 p.
Research subject
Process Metallurgy
URN: urn:nbn:se:ltu:diva-40273ScopusID: 30314435Local ID: f56fdd00-fcc8-11dc-a946-000ea68e967bISBN: 1886362114 (print)OAI: diva2:1013795
Steelmaking Conference : 24/03/1996 - 27/03/1996
Godkänd; 1996; 20080328 (cira)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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