Affiliation:
1. Wuhan University of Science and Technology, the Hubei Province Key Laboratory of Refractories and Ceramics, Wuhan, China
Abstract
Gas blowing at the bottom of tundish is an efficient metallurgy technique in
clean steelmaking. In this paper, the removal of small size inclusions in the
gas bottom-blowing tundish was studied by numerical simulation and industrial
practice. The residence time distribution (RTD) of molten steel in the
tundish was calculated by mathematical modeling. The content of small size
inclusions in the slab was analyzed using a oxygen probing and metallographic
images. The results show that the molten steel characteristics obviously
change when applied gas bottom-blowing, the average residence time of molten
steel in the tundish prolongs more than 100s and the dead volume fraction
decreases about 5%. Therefore, the removal efficiency of small size
inclusions greatly increases because of bubbles attachment and long moving
path. Industrial experiment results show that the average inclusions content
of less than 20?m decreases more than 24%, the average overall oxygen content
decreases about 15% when controlling the reasonable blowing parameters.
Publisher
National Library of Serbia
Subject
Materials Chemistry,Metals and Alloys,Mechanics of Materials,Geotechnical Engineering and Engineering Geology
Cited by
17 articles.
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