Physical simulation of bubble refinement in bottom blowing process with mechanical agitation
| Autor: | Jian‑ming Su, Yan Liu, Ting‑an Zhang, Zhi‑he Dou |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Bubble 0211 other engineering and technologies Metals and Alloys 02 engineering and technology Mechanics 01 natural sciences Capillary number Volumetric flow rate Physics::Fluid Dynamics Mechanics of Materials Mass transfer Scientific method 0103 physical sciences Metallic materials Materials Chemistry Physics::Chemical Physics Contact area 021102 mining & metallurgy |
| Zdroj: | Journal of Iron and Steel Research International. 27:1137-1144 |
| ISSN: | 2210-3988 1006-706X |
| DOI: | 10.1007/s42243-020-00368-2 |
| Popis: | In order to increase the contact area and promote the mass transfer process of gas and liquid, the process of the bubble refinement in a metallurgical reactor with mechanical agitation was studied by physical simulation. Based on the capillary number, a prediction equation for the bubble refinement was established. The effects of the gas flow rate, the stirring speed and the stirring depth on the bubble refinement in the reactor were discussed in detail. The distribution of the bubble diameter in the reactor was obtained under different conditions. The results show that when the stirring speed reaches 300 r/min, the bubble diameter mainly distributes in the range of 1–2 mm. A higher gas flow rate may increase the number of bubbles in the melt and promote the bubble refinement process. The mechanism of bubble refinement under mechanical agitation was analyzed, and the results indicated that the stirring speed, the blade area and the blade inclination are the main influencing factors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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