A new method for removal of dissolved gases and inclusions from liquid metals

Wang, Laihua, Lee, Hae-Geon and Hayes, Peter C. (1996). A new method for removal of dissolved gases and inclusions from liquid metals. In: Proceedings of the 1996 International Symposium on Injection in Pyrometallurgy. The Howard Worner International Symposium on Injection in Pyrometallurgy, Melbourne, VIC Australia, (287-295). 1-3 July 1996.

Author Wang, Laihua
Lee, Hae-Geon
Hayes, Peter C.
Title of paper A new method for removal of dissolved gases and inclusions from liquid metals
Conference name The Howard Worner International Symposium on Injection in Pyrometallurgy
Conference location Melbourne, VIC Australia
Conference dates 1-3 July 1996
Proceedings title Proceedings of the 1996 International Symposium on Injection in Pyrometallurgy
Place of Publication Warrendale PA, USA
Publisher Minerals, Metals & Materials Society
Publication Year 1996
Sub-type Fully published paper
Open Access Status Not yet assessed
ISBN 9780873393416
0873393414
Start page 287
End page 295
Total pages 9
Abstract/Summary This paper introduces a new process for the efficient removal of dissolved gases and inclusions from liquid metals. This process involves the creation and dispersion of fine bubbles in molten metals by introducing inert or reactive gas into a region of turbulent flow. 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 concept has been previously demonstrated using a full-scale air/water model to simulate the ladle-to-tundish system of continuous casting of steel. The present cold modelling work has further demonstrated the ability of the process to remove gas solutes. The results indicate that the efficiency of new process is several hundred times greater than that of conventional high speed rotating injectors which are currently applied in the treatment of liquid light metals.
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collection: School of Chemical Engineering Publications
 
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Created: Wed, 20 Jan 2016, 22:28:38 EST by Vicki Thompson on behalf of School of Chemical Engineering