Water Modeling on Circulating Flow and Mixing Time in a Ruhrstahl–Heraeus Vacuum Degasser. Issue 10 (22nd July 2021)

• Record Type: Journal Article
• Authors: Liu, Chang; Zhang, Lifeng; Li, Fei; Peng, Kaiyu; Liu, Fenggang; Liu, Zhentong; Zhao, Yanyu; Yang, Wen; Zhang, Jing
• Is Part Of: Steel research international. Volume 92:Issue 10(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-07-22
• Subjects: circulating flow -- mixing time -- Ruhrstahl–Heraeus reactor -- water model; Steel -- Periodicals; Steel -- Metallurgy -- Periodicals; 669.142
• DOI: 10.1002/srin.202000608
• Languages: English
• ISSNs: 1611-3683

Abstract

Abstract : A physical water model based on the similarity principle is established to investigate the fluid flow and mixing phenomena during the Ruhrstahl–Heraeus (RH) steel refining process. The velocity distribution and the turbulent features on the center section are obtained using particle image velocimetry (PIV) measurement. Two vortexes between the down‐leg snorkel and the ladle sidewall are observed. The effects of the number of gas‐injection nozzles and the liquid levels in the vacuum chamber on the fluid phenomena are performed. More injected nozzles and a higher liquid level in the vacuum chamber generate larger velocity in the ladle. Twenty monitors in the ladle are used to monitor the variation of the conductivity to obtain the mixing time, indicating that the mixing time varies much with locations. The distribution of the mixing time on the vertical center section of the ladle is obtained. Moreover, the relationship between the circulation rate and the mixing time is obtained, indicating that the mixing time decreases with increasing circulation rate, and the slope of their relationship is −0.35. Abstract : A physical water model based on the similarity principle is established to investigate the fluid flow and mixing phenomena during the Ruhrstahl–Heraeus (RH) steel refining process. Twenty monitors in the ladle are used to monitor the variation of the conductivity to obtain the mixing time, indicating that the mixing time varied much with locations.