A New Approach to Molten Steel Refining Using Fine Gas Bubbles

Wang, Laihua, Lee, Hae-Geon and Hayes, Peter C. (1996) A New Approach to Molten Steel Refining Using Fine Gas Bubbles. ISIJ International, 36 1: 17-24. doi:10.2355/isijinternational.36.17


Author Wang, Laihua
Lee, Hae-Geon
Hayes, Peter C.
Title A New Approach to Molten Steel Refining Using Fine Gas Bubbles
Journal name ISIJ International   Check publisher's open access policy
ISSN 0915-1559
1347-5460
Publication date 1996-01-01
Sub-type Article (original research)
DOI 10.2355/isijinternational.36.17
Open Access Status DOI
Volume 36
Issue 1
Start page 17
End page 24
Total pages 8
Place of publication Tokyo, Japan
Publisher Nippon Tekko Kyokai / Iron and Steel Institute of Japan
Abstract A new process has been developed for metal refining. This process involves the creation and dispersion of fine bubbles in molten metals by introducing inert or reactive gas into a turbulent flow region during metal transfer. The highly turbulent metal flow splits the gas into fine bubbles and results in good mixing between the gas and molten metal phases. These conditions are ideal for contacting inclusions in the metal with the bubbles and subsequent flotation of the inclusions to the metal-slag interface where the inclusions are then absorbed by the covering slag layer. Dissolved gases, such as [H], [O], [N], in the metals are also transferred to the gas bubbles and removed from solution. The process can be retrofitted into existing process plants. The process concept has been demonstrated using a full-scale air/water model to simulate the ladle-to-tundish system of continuous casting of steel. At liquid flows typical of those encountered in the caster, fine bubbles smaller than 0.5 mm in diameter can be created and a good mixing between the dispersed gas and the liquid has been achieved.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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Created: Sat, 16 Jan 2016, 00:38:45 EST by Vicki Thompson on behalf of School of Chemical Engineering