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Modification of oxide inclusions in calcium-treated Al-killed high sulphur steels

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Gollapalli, Veerababu, Rao, M. B. Venkata, Karamched, Phani S., Borra, Chenna Rao, Roy, Gour G. and Srirangam, Prakash (2019) Modification of oxide inclusions in calcium-treated Al-killed high sulphur steels. Ironmaking & Steelmaking, 46 (7). pp. 663-670. doi:10.1080/03019233.2018.1443382 ISSN 0301-9233.

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Official URL: http://dx.doi.org/10.1080/03019233.2018.1443382

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Abstract

A study has been carried out to understand the modification of alumina inclusions in Al-killed high sulphur steel with calcium treatment. For calcium treatment to be effective, a general practice is to desulphurise the steel to prevent the formation of solid CaS inclusions that are harmful to steel quality and final properties. To avoid this additional desulphurising step, the authors developed a new approach of calcium treatment of steel at an industrial scale. This approach involves treating the liquid steel with calcium treatment at low aluminium levels which enables formation of liquid calcium aluminate inclusions (C12A7) in the melt and then adding remaining amount of required aluminium. Based on this principle, Al-S diagram has been developed and calcium treatment has been modified accordingly. The inclusion transformation and morphology were studied using scanning electron microscope /energy dispersive spectroscopy analysis and. activity of CaS was calculated.

Item Type: Journal Article
Divisions: Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title: Ironmaking & Steelmaking
Publisher: Maney Publishing
ISSN: 0301-9233
Official Date: 2019
Dates:
DateEvent
2019Published
15 March 2018Available
12 February 2018Accepted
25 December 2017Submitted
Volume: 46
Number: 7
Page Range: pp. 663-670
DOI: 10.1080/03019233.2018.1443382
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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