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- Title
Effect of Nonequilibrium Decarburization on Inclusion Transfer During Single Snorkel RH Vacuum Refining.
- Authors
Chen, Shifu; Lei, Hong; Li, Qiang; Ding, Changyou; Dou, Weixue; Chang, Lishan
- Abstract
Single snorkel Rheinstahl–Heraeus (SSRH) has shown outstanding performance in inclusion removal for decades. By coupling the unsteady CO-Ar-liquid steel flow and the nonequilibrium decarburization process, the inclusion mass/population conservation model has been developed to investigate the inclusion transfer behavior of SSRH, and the effect of the bubble slip velocity on the inclusion convection is introduced into the mathematical model in this paper. The result shows that the stirring and the transport effect of CO bubbles can improve the inclusion transfer kinetic condition, and promote the inclusion convection and removal process. In the first minute during SSRH refining, the average inclusion volume concentration and the average inclusion number density in the unsteady CO-Ar-liquid steel flow are 13.63% and 10.85%, respectively, less than those in the steady Ar-liquid steel flow. In addition, due to the greater turbulent collision rate, the average inclusion characteristic radius increases from 1.44 μm (Ar-liquid steel) to 1.56 μm (CO-Ar-liquid steel).
- Subjects
NONEQUILIBRIUM flow; MASS transfer; SKIN diving
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2022, Vol 74, Issue 4, p1578
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-022-05182-7