Physical Model Studies on Slag Foaming
| Autor: | Hae-Geon Lee, Surinder S. Ghag, Peter C. Hayes |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Chromatography
Dodecylbenzene Mechanical Engineering Bubble Compressed air Metals and Alloys Slag Residence time (fluid dynamics) Physics::Fluid Dynamics Condensed Matter::Soft Condensed Matter Surface tension chemistry.chemical_compound Chemical engineering chemistry Pulmonary surfactant Distilled water Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium |
| Zdroj: | ISIJ International. 38:1201-1207 |
| ISSN: | 0915-1559 |
| Popis: | A physical modelling investigation has been undertaken to determine the relationship between the physico-chemical properties of the liquid phase, the gas bubble size, the gas flux, and the residence times of gas in spherical foams. The testwork was conducted in a 107 mm diameter glass column in a temperature controlled environment. The foams were generated by the injection of compressed air into solutions of distilled water and glycerol. Water glycerol solutions were used to obtain a wide range of liquid viscosities. The strongly adsorbing surfactant, sodium dodecylbenzene sulphonate, was added to the water–glycerol solutions so that the surface tensions of the solutions could also be controlled. The experimental results show that the residence times of gas bubbles in the foam increase with increasing liquid viscosity and increasing surface tension depression, and with decreasing gas bubble size. Furthermore, a transition from a foaming to a non-foaming regime was observed as the mean gas bubble diameter increased above 5 mm. |
| Databáze: | OpenAIRE |
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