Bubble and liquid flow characteristics in a wood’s metal bath stirred by bottom helium gas injection |
| |
Authors: | Manabu Iguchi Hirohiko Tokunaga Hideo Tatemichi |
| |
Affiliation: | (1) the Division of Material Science and Engineering, Graduate School of Engineering, Hokkaido University, 060 Hokkaido, Japan;(2) Process Engineering Section, Kakogawa Works, Kobe Steel Ltd., 675 Hyogo, Japan;(3) Equipment and Energy Department, Kakogawa Works, Kobe Steel Ltd., 675 Hyogo, Japan |
| |
Abstract: | A model study was carried out to elucidate bubble and liquid flow characteristics in the reactor of metals refining processes
stirred by gas injection. Wood’s metal with a melting temperature of 70 °C was used as the model of molten metal. Helium gas
was injected into the bath through a centered single-hole bottom nozzle to form a vertical bubbling jet along the centerline
of the bath. The bubble characteristics specified by gas holdup, bubble frequency, and so on were measured using a two-needle
electroresistivity probe, and the liquid flow characteristics, such as the axial and radial mean velocity components, were
measured with a magnet probe. In the axial region far from the nozzle exit, where the disintegration of rising bubbles takes
place and the radial distribution of gas holdup follows a Gaussian distribution, the axial mean velocity and turbulence components
of liquid flow in the vertical direction are predicted approximately by empirical correlations derived originally for a water-air
system, although the physical properties of the two systems are significantly different from each other. Under these same
conditions, those turbulent parameters in high-temperature metals refining processes should thus be accurately predicted by
the same empirical correlations. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|