Bubble behavior and evolution characteristics in the RH riser tube-vacuum chamber
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Yihong Li
,
Hongwei Zhu
Abstract
The motion behavior of bubbles in a riser tube is studied in order to analyze the bubble evolution characteristics. Gas distribution and bubble movement in risers and vacuum chambers have important effects on liquid steel flow, mixing and refining process. It is found that the initial diameter of argon bubbles in the riser tube decreased with decreasing vacuum degree. The diameter of argon bubbles in the riser tube increased with increasing gas flow rate. The bubbles could be divided into the single bubble rising zone and the bubble breaking coalescence zone in the rising tube. After the bubbles were blown in, they changed from regular spherical shapes to flat shapes in the single bubble rising zone, and then broke apart into small bubbles in the bubble breaking coalescence zone. Variations in the gas flow rate and vacuum degree had significant effects on the regional distribution of bubble motion and bubble residence time. The critical height of the single bubble rising zone and the bubble breaking coalescence zone were stable when the bubble travel distance was greater than 280 mm.
Funding source: National Natural Science Foundation of China
Award Identifier / Grant number: 51904278
Funding source: Natural Science Foundation of Shanxi Province
Award Identifier / Grant number: 20210302123218
Acknowledgments
We thank LetPub (www.letpub.com) for its linguistic assistance during the preparation of this manuscript.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: The authors are grateful for support from the National Natural Science Foundation of China (NO. 51904278), Key Research and Development Project of Shanxi Province (No. 201903D121093), Natural Science Foundation of Shanxi Province (No. 20210302123218), Innovation Projects of Colleges and Universities in Shanxi Province (No.2019L0577).
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Conflict of interest statement: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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Articles in the same Issue
- Frontmatter
- Special Issue Articles
- Preface: Special issue of “Metallurgical Reaction Engineering”
- The relationship between melt structure and viscosity: the effect of different fluxes on CaO–SiO2 slags
- Analysis of nozzle clogging position in a continuous casting mold
- Numerical simulation of iron ore sintering process with coke oven gas injection and oxygen enrichment
- Bubble behavior and evolution characteristics in the RH riser tube-vacuum chamber
- Combined models with tanks in series for characterization of tundish flows in continuous casting of steel
- Numerical simulation of inner characteristics in COREX shaft furnace with center gas distribution: influence of bed structure
- Effects of operation parameters on particle mixing performance in a horizontal high shear mixer
- Numerical study on the distribution of flue gas residence time in the desulfurization and denitrification system by the optimization of the model
- Numerical investigation of scrap melting in high-carbon hot metal
Articles in the same Issue
- Frontmatter
- Special Issue Articles
- Preface: Special issue of “Metallurgical Reaction Engineering”
- The relationship between melt structure and viscosity: the effect of different fluxes on CaO–SiO2 slags
- Analysis of nozzle clogging position in a continuous casting mold
- Numerical simulation of iron ore sintering process with coke oven gas injection and oxygen enrichment
- Bubble behavior and evolution characteristics in the RH riser tube-vacuum chamber
- Combined models with tanks in series for characterization of tundish flows in continuous casting of steel
- Numerical simulation of inner characteristics in COREX shaft furnace with center gas distribution: influence of bed structure
- Effects of operation parameters on particle mixing performance in a horizontal high shear mixer
- Numerical study on the distribution of flue gas residence time in the desulfurization and denitrification system by the optimization of the model
- Numerical investigation of scrap melting in high-carbon hot metal
