Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Aspects on slag/metal equilibrium calculations and metal droplet characteristics in ladle slags
KTH, Superseded Departments, Materials Science and Engineering.ORCID iD: 0000-0002-9872-3738
2004 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

In the present work the mixing between the metal and slagphase during the ladle refining process from tapping from theelectric arc furnace to casting in two different Swedish steelplants has been studied.

Three slag models and the sulphur-oxygen equilibrium betweenslag and steel was used together with the dilute solution modelfor the liquid steel phase to predict the equilibrium oxygenactivity in steel bulk and metal droplets in top slag inequilibrium with the top slag. The predicted oxygen activitieswere compared with measured oxygen activities from the steelbulk. The results show significant discrepancies between thecalculated and measured oxygen activities and the reasons forthe differences are discussed.

Metal droplet distribution in slag samples have also beendetermined using classification according to the Swedishstandard SS111116. It was found that most metal droplets arefound in the slag samples taken before vacuum degassing. Thetotal area between steel droplets and slag has been determinedto be 3 to 14 times larger than the projected flat interfacearea between top slag and steel. The effect of slag viscosityand reactions between steel and slag on the metal dropletformation in slags is also discussed.

The chemical composition of the metal droplets in the topslag was determined and possible reactions taking place betweenthe steel droplets and the slag was studied. Differencesbetween steel droplet compositions and the bulk steelcomposition are discussed. The results show significantdifferences between steel droplet and bulk steelcomposition.

Key words:oxygen activity, metal droplets, sulphur,slag, ladle, refining, distribution.

Place, publisher, year, edition, pages
Stockholm: Materialvetenskap , 2004. , ix, 12 p.
Identifiers
URN: urn:nbn:se:kth:diva-1788ISBN: 91-7283-812-4 (print)OAI: oai:DiVA.org:kth-1788DiVA: diva2:7790
Note

QCR 20161026

Available from: 2004-07-07 Created: 2004-07-07 Last updated: 2016-10-26

Open Access in DiVA

fulltext(675 kB)2527 downloads
File information
File name FULLTEXT01.pdfFile size 675 kBChecksum MD5
40377aef4cc27bbe4418d13ea4238410e13a5de138e0f9569c70042f1836fea0366dc763
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Ekengård, Johan
By organisation
Materials Science and Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 2527 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 976 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf