Observations of pulsating Marangoni phenomena during the local oxidation of deoxidized liquid steel

G. R. Belton; T. J. Evans; L. Strezov

Observations of pulsating Marangoni phenomena during the local oxidation of deoxidized liquid steel

G. R. Belton^*, T. J. Evans, L. Strezov

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Studies have been made by means of a high-speed video technique of the surface of Al-Si-Mn deoxidized liquid steel at about 1600°C during local reoxidation by gently impinging flows of CO ₂-containing gases. Expanding 'necklaces' of alumina oxidation product have been observed to form at frequencies of up to about 5 Hz and to travel at velocities of up to 250 mm s ^-1 near to the gas inlet tube, depending on the experimental conditions. The pulsation frequency appears to be controlled by the rate of diffusion of aluminium to the surface. The effects of additions of the surfactants sulphur and selenium on the velocity of the moving front are shown to be consistent with the processes being surface tension driven.

Original language	English
Pages (from-to)	941-953
Number of pages	13
Journal	Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume	356
Issue number	1739
Publication status	Published - 15 Apr 1998

Keywords

Alumina formation
Effect of surfactants
Local oxidation
Marangoni flow
Steel reoxidation
Surface velocities

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title = "Observations of pulsating Marangoni phenomena during the local oxidation of deoxidized liquid steel",

abstract = "Studies have been made by means of a high-speed video technique of the surface of Al-Si-Mn deoxidized liquid steel at about 1600°C during local reoxidation by gently impinging flows of CO 2-containing gases. Expanding 'necklaces' of alumina oxidation product have been observed to form at frequencies of up to about 5 Hz and to travel at velocities of up to 250 mm s -1 near to the gas inlet tube, depending on the experimental conditions. The pulsation frequency appears to be controlled by the rate of diffusion of aluminium to the surface. The effects of additions of the surfactants sulphur and selenium on the velocity of the moving front are shown to be consistent with the processes being surface tension driven.",

keywords = "Alumina formation, Effect of surfactants, Local oxidation, Marangoni flow, Steel reoxidation, Surface velocities",

author = "Belton, {G. R.} and Evans, {T. J.} and L. Strezov",

year = "1998",

month = apr,

day = "15",

language = "English",

volume = "356",

pages = "941--953",

journal = "Philosophical Transactions - Royal Society of London, A",

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publisher = "Royal Society of London",

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TY - JOUR

T1 - Observations of pulsating Marangoni phenomena during the local oxidation of deoxidized liquid steel

AU - Belton, G. R.

AU - Evans, T. J.

AU - Strezov, L.

PY - 1998/4/15

Y1 - 1998/4/15

N2 - Studies have been made by means of a high-speed video technique of the surface of Al-Si-Mn deoxidized liquid steel at about 1600°C during local reoxidation by gently impinging flows of CO 2-containing gases. Expanding 'necklaces' of alumina oxidation product have been observed to form at frequencies of up to about 5 Hz and to travel at velocities of up to 250 mm s -1 near to the gas inlet tube, depending on the experimental conditions. The pulsation frequency appears to be controlled by the rate of diffusion of aluminium to the surface. The effects of additions of the surfactants sulphur and selenium on the velocity of the moving front are shown to be consistent with the processes being surface tension driven.

AB - Studies have been made by means of a high-speed video technique of the surface of Al-Si-Mn deoxidized liquid steel at about 1600°C during local reoxidation by gently impinging flows of CO 2-containing gases. Expanding 'necklaces' of alumina oxidation product have been observed to form at frequencies of up to about 5 Hz and to travel at velocities of up to 250 mm s -1 near to the gas inlet tube, depending on the experimental conditions. The pulsation frequency appears to be controlled by the rate of diffusion of aluminium to the surface. The effects of additions of the surfactants sulphur and selenium on the velocity of the moving front are shown to be consistent with the processes being surface tension driven.

KW - Alumina formation

KW - Effect of surfactants

KW - Local oxidation

KW - Marangoni flow

KW - Steel reoxidation

KW - Surface velocities

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VL - 356

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JO - Philosophical Transactions - Royal Society of London, A

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