Determination of inclusions in liquid steel after calcium treatment

Kabamba Tshilombo

doi:10.1007/s12613-010-0105-2

Volume 17 Issue 1

Feb. 2010

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Kabamba Tshilombo, Determination of inclusions in liquid steel after calcium treatment, Int. J. Miner. Metall. Mater., 17(2010), No. 1, pp.28-31. https://dx.doi.org/10.1007/s12613-010-0105-2

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Determination of inclusions in liquid steel after calcium treatment

Kabamba Tshilombo^,

Department of Material Science and Manufacturing, Council for Scientific and Industrial Research, Pretoria, 0001, South Africa

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Kabamba Tshilombo E-mail: ktshilombo@csir.co.za

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中文摘要

Nozzle blocking was eliminated by calcium-treated liquid steel through changing the chemical and phase composition of alumina inclusions in aluminium-killed steel. Three different methods were applied to determine the composition of inclusions in liquid steel: total oxygen content samples, sampling spoon samples, and “lollipop” steel samples. The results show that calcium modification of liquid steel influences the inclusion composition varying from 2wt% to 14wt% depending on the method used. The composition of inclusions contains mainly Al₂O₃-CaO only, or is associated with SiO₂ or MgO depending on the initial input. The methods used in this study are indicators of the inclusion composition but can be improved to quantify the inclusion size.

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Determination of inclusions in liquid steel after calcium treatment

Kabamba Tshilombo^,

Author Affilications

Department of Material Science and Manufacturing, Council for Scientific and Industrial Research, Pretoria, 0001, South Africa

Received: 16 February 2009; Revised: 19 March 2009; Accepted: 24 March 2009;

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