Understanding the solidification of stainless steel slag and dust mixtures

Sung Suk Jung, Gi Beom Kim, Il Sohn

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The solidification of a multicomponent stainless steel slag and dust composite has been studied by thermodynamic calculations using Factsage and analyses of samples using EPMA and Rietveld refinement of synchrotron X-ray powder diffraction after various cooling rates. At an apparent cooling rate of 1 K/min, the content of spinel (10.6 wt%) was less than thermodynamically calculated (16.6 wt%), largely because of difficulties in the diffusion of depleted ions (including Cr, Mn, and Ni) in the liquid with very gradual compositional gradients. Melilite showed a uniform but distorted crystal structure of P21212 and its content (48.9 wt%) was larger than the calculated result (32.3 wt%). At apparent cooling rates of 10 K/min and 50 K/min, a slight decrease in spinel and a significant decrease in melilite were observed, and the spinel was divided into two regions with an identical space group of Fd (Formula presented.) m but with distinguished composition and lattice parameters. However, the amorphous proportion consistently increased with the cooling rate from 29.4 wt% at 1 K/min to 69.6 and 92.9 wt% at 10 K/min and 50 K/min respectively.

Original languageEnglish
Pages (from-to)3771-3783
Number of pages13
JournalJournal of the American Ceramic Society
Volume100
Issue number8
DOIs
Publication statusPublished - 2017 Aug 1

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Stainless Steel
Slags
Dust
Solidification
Stainless steel
Cooling
Rietveld refinement
Electron probe microanalysis
Synchrotrons
X ray powder diffraction
Lattice constants
Crystal structure
Thermodynamics
Ions
Composite materials
Liquids
Chemical analysis
spinell

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

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abstract = "The solidification of a multicomponent stainless steel slag and dust composite has been studied by thermodynamic calculations using Factsage and analyses of samples using EPMA and Rietveld refinement of synchrotron X-ray powder diffraction after various cooling rates. At an apparent cooling rate of 1 K/min, the content of spinel (10.6 wt{\%}) was less than thermodynamically calculated (16.6 wt{\%}), largely because of difficulties in the diffusion of depleted ions (including Cr, Mn, and Ni) in the liquid with very gradual compositional gradients. Melilite showed a uniform but distorted crystal structure of P21212 and its content (48.9 wt{\%}) was larger than the calculated result (32.3 wt{\%}). At apparent cooling rates of 10 K/min and 50 K/min, a slight decrease in spinel and a significant decrease in melilite were observed, and the spinel was divided into two regions with an identical space group of Fd (Formula presented.) m but with distinguished composition and lattice parameters. However, the amorphous proportion consistently increased with the cooling rate from 29.4 wt{\%} at 1 K/min to 69.6 and 92.9 wt{\%} at 10 K/min and 50 K/min respectively.",
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Understanding the solidification of stainless steel slag and dust mixtures. / Jung, Sung Suk; Kim, Gi Beom; Sohn, Il.

In: Journal of the American Ceramic Society, Vol. 100, No. 8, 01.08.2017, p. 3771-3783.

Research output: Contribution to journalArticle

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