Mixing Phenomenon and Flow Field in Ladle of RH Process
| Autor: | Yang Liu, Rudong Wang, Heng Cui, Kaitian Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
lcsh:TN1-997
Ladle RH degasser Materials science Degasser physical Simulation Flow (psychology) 0211 other engineering and technologies Metals and Alloys 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology PIV Particle image velocimetry Immersion (virtual reality) Water model General Materials Science Vacuum chamber 0210 nano-technology Mixing (physics) lcsh:Mining engineering. Metallurgy mixing Time flow field 021102 mining & metallurgy |
| Zdroj: | Metals Volume 9 Issue 8 Metals, Vol 9, Iss 8, p 886 (2019) |
| ISSN: | 2075-4701 |
| DOI: | 10.3390/met9080886 |
| Popis: | Particle image velocimetry (PIV) system was adopted to investigate the relationship between the mixing phenomenon and the flow field of a 210 t RH degasser by a 1:4 scale water model. The results of mixing simulation experiments indicated that the mixing time decreased with the increase of gas blowing rate. However, with the increase of Snorkel immersion depth (SID), the mixing time presented a decreasing rend firstly and then increased. The measurement of flow fields of RH ladle by PIV system can explain the phenomenon above. According to the characteristics of the flow field in RH ladle, the flow field can be divided into the mixing layer, the transition layer, and the inactive layer. On the one hand, the stirring power in RH ladle and vacuum chamber both increases with more gas blowing rate, leading to the decrease of mixing time. On the other hand, with SID increases from 400 mm to 480 mm, the gas blowing depth increase results in the mixing power increases, and the mixing time decreases at the beginning. Because of too much-molten steel in the vacuum chamber and the expanding of the inactive layer in RH ladle, however, the utilization rate of the gas driving force begins to decrease. Therefore, the mixing time started to increases with the increase of SID. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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