No abstract

An experimental study has been made on determining the size of bubbles at a single alumina nozzle immersed in molten iron by using a pressure pulse technique. Nozzles used in the experiments are of sizes of 0.32 ~ 0.67cm in OD and 0. 12~0.33cm in ID. The gas-jiow rate and the oxygen content in the iron melt were varied from 0.1 to 36 cm'/sec at 1 600°C andfrom 0.0040 to 0.046%, respectively. The observed bubble size has been compared with calcula tions from theoretical and empirical equations obtained for wetted I/o zzles in water and organic liquids. Calculations show good agreement with experiments provided the outer nozzle diameter is taken as the correlating nozzle diameter. B ased on the present study, an empirical equation (Eq. (4)) is given to represent the size of bubbles ill the present range of gas-jiow rates. It is shawl! that the empirical equatioll can be applied to predict the size of bubbles ill various liquids .

No abstract

No abstract

No abstract