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3D numerical investigation of effects of density and surface tension on mixing time in bottom-blown gas-stirred ladles
- Source :
- Transactions of Nonferrous Metals Society of China. 31:3177-3191
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- In molten phase metallurgical processes, mixing via gas injection has a vital role in obtaining a homogeneous product. The efficiency of mixing depends on operational variables such as gas flow rate and slag height as well as physical properties of the molten phases. A numerical simulation is conducted to study the above parameters in the flow behavior of a bottom-blown bath. The molten metal and the slag are modeled by water and oil, respectively. The numerical results, particularly the mixing time, are validated against experimental data. The results show that mixing time increases as the slag height increases and decreases as the density of the slag material increases. The mixing time decreases with an increase in the density of the primary phase; however, it increases as the surface tension between air and water increases. A case with properties close to a real molten metal is also modeled. The performance of the system is influenced by the momentum rather than the dissipative forces. Thus, the effect of the density of the molten phase on the mixing process is more pronounced compared to the effect of the surface tension between the air and the molten phase.
- Subjects :
- Momentum (technical analysis)
Materials science
Flow (psychology)
Metals and Alloys
Mixing (process engineering)
Slag
Mechanics
Geotechnical Engineering and Engineering Geology
Condensed Matter Physics
Volumetric flow rate
Surface tension
visual_art
Phase (matter)
Materials Chemistry
Dissipative system
visual_art.visual_art_medium
Subjects
Details
- ISSN :
- 10036326
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Transactions of Nonferrous Metals Society of China
- Accession number :
- edsair.doi...........26bfa87d9275d903c7cfba07e4eb8641
- Full Text :
- https://doi.org/10.1016/s1003-6326(21)65722-9