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In Situ Observation of Calcium Aluminate Inclusions Dissolution into Steelmaking Slag

In Situ Observation of Calcium Aluminate Inclusions Dissolution into Steelmaking Slag TOPICAL COLLECTION: ADVANCES IN MATERIALS MANUFACTURING AND PROCESSING In Situ Observation of Calcium Aluminate Inclusions Dissolution into Steelmaking Slag KEYAN MIAO, ALYSSA HAAS, MUKESH SHARMA, WANGZHONG MU, and NESLIHAN DOGAN The dissolution rate of calcium aluminate inclusions in CaO-SiO -Al O slags has been studied 2 2 3 using confocal scanning laser microscopy (CSLM) at elevated temperatures: 1773 K, 1823 K, and 1873 K (1500 C, 1550 C, and 1600 C). The inclusion particles used in this experimental work were produced in our laboratory and their production technique is explained in detail. Even though the particles had irregular shapes, there was no rotation observed. Further, the total dissolution time decreased with increasing temperature and decreasing SiO content in the slag. The rate limiting steps are discussed in terms of shrinking core models and diffusion into a stagnant fluid model. It is shown that the rate limiting step for dissolution is mass transfer in the slag at 1823 K and 1873 K (1550 C and 1600 C). Further investigations are required to determine the dissolution mechanism at 1773 K (1500 C). The calculated diffusion coefficients were inversely proportional to the slag viscosity and the obtained values for the systems studied http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Metallurgical and Materials Transactions B Springer Journals

In Situ Observation of Calcium Aluminate Inclusions Dissolution into Steelmaking Slag

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Publisher
Springer Journals
Copyright
Copyright © 2018 by The Minerals, Metals & Materials Society and ASM International
Subject
Materials Science; Metallic Materials; Characterization and Evaluation of Materials; Structural Materials; Surfaces and Interfaces, Thin Films; Nanotechnology
ISSN
1073-5615
eISSN
1543-1916
DOI
10.1007/s11663-018-1303-y
Publisher site
See Article on Publisher Site

Abstract

TOPICAL COLLECTION: ADVANCES IN MATERIALS MANUFACTURING AND PROCESSING In Situ Observation of Calcium Aluminate Inclusions Dissolution into Steelmaking Slag KEYAN MIAO, ALYSSA HAAS, MUKESH SHARMA, WANGZHONG MU, and NESLIHAN DOGAN The dissolution rate of calcium aluminate inclusions in CaO-SiO -Al O slags has been studied 2 2 3 using confocal scanning laser microscopy (CSLM) at elevated temperatures: 1773 K, 1823 K, and 1873 K (1500 C, 1550 C, and 1600 C). The inclusion particles used in this experimental work were produced in our laboratory and their production technique is explained in detail. Even though the particles had irregular shapes, there was no rotation observed. Further, the total dissolution time decreased with increasing temperature and decreasing SiO content in the slag. The rate limiting steps are discussed in terms of shrinking core models and diffusion into a stagnant fluid model. It is shown that the rate limiting step for dissolution is mass transfer in the slag at 1823 K and 1873 K (1550 C and 1600 C). Further investigations are required to determine the dissolution mechanism at 1773 K (1500 C). The calculated diffusion coefficients were inversely proportional to the slag viscosity and the obtained values for the systems studied

Journal

Metallurgical and Materials Transactions B – Springer Journals

Published: Jun 4, 2018

References

  • Slag Atlas
  • Chemical Reaction Engineering
    Levenspiel, O.