Metall. Res. Technol.
Volume 119, Number 3, 2022
|Number of page(s)||10|
|Published online||17 June 2022|
Effect of multi-angle parameter on fluid flow characteristics of swirl-type oxygen lance
School of Materials and Metallurgy, University of Science and Technology Liaoning, 114051 Anshan, China
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Accepted: 29 March 2022
The supersonic jet characteristics of the oxygen lance nozzle play an important role in converter melting. In this study, the jet characteristics of swirl-type oxygen lance were investigated by numerical simulation. The velocity field, jet coalescence behavior and jet impact cavity area of swirl-type oxygen lance with different inclination and swirl angles were analyzed. The results demonstrate that compared with the traditional oxygen lance, the swirl angle accelerates the attenuation of the jet. However, the tangential velocity of jet is conducive to the rapid melting of the slag in the steelmaking process. With the increase of swirl angle and inclination angle, the velocity of jet decreases, the temperature of jet increases and the independence between jets is improved. With the increase of the swirl angle, the tangential velocity of the swirl-type oxygen lance increases, but the possibility of slag adhering to the nozzle surface increases. The effective impact area varies non-monotonically with the swirl angle. The optimum inclination and swirl angle of the swirl-type oxygen lance for a 260 t converter are 15° and 10° respectively. When the oxygen flow rate increases, the decay of jet velocity decreases and the effective impact area increases.
Key words: swirling jet / jet coalescence / impact area / oxygen lance
© EDP Sciences, 2022
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