Observation of Calcium Aluminate Inclusions at Interfaces between Ca-Treated, Al-Killed Steels and Slags

B. Coletti, S. Vantilt, B. Blanpain, S. Sridhar

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

The evolution of Al2O3-CaO inclusions on molten steel surfaces and at molten steel/slag interfaces was observed in-situ through a confocal scanning laser microscope (CSLM) equipped with a gold-image furnace. Depending on the slag chemistry, some of the initially liquid inclusions evolved into irregular Al2O3 or SiO2-enriched inclusions during the separation across the interface. Inclusions were found to cluster at specific locations at the steel/slag interface. Unlike capillary-depression-driven clustering, which is observed on molten steel surfaces, a weak repulsive force opposes fluid-flow-driven clustering at the steel/slag interface. After clustering, the irregular solid inclusions were observed to agglomerate to form large aggregates.

Original languageEnglish (US)
Pages (from-to)533-538
Number of pages6
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume34
Issue number5
DOIs
StatePublished - Oct 2003
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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