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
A New Experimental Design to Study the Kinetics of Solid Dissolution into Liquids at Elevated Temperature
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering. (Micro-modelling)
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Micro-Modelling.
Elkem AS, Technology.
2017 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916Article in journal (Other academic) Submitted
Abstract [en]

A new method was developed to study the dissolution of solid cylinder in liquid under forcedconvection at elevated temperature. In the new design, a rotating cylinder was placedconcentrically in a container fabricated by boring four holes into a blank materials for creatingan internal volume with a quatrefoil profile. A strong flow in radial direction in the liquid wascreated, which was evidently shown by computational fluid dynamic (CFD) calculations andexperiments at both room temperature and elevated temperature. The new setup was able tofreeze the sample as it was at experimental temperature especially the interface between thesolid and the liquid. This freezing was necessary to obtain reliable information forunderstanding the reaction mechanism. This was exemplified by the study of dissolution ofrefractory in liquid slag. The absence of flow in radial direction in the traditional setup using asymmetrical cylinder was also discussed. The difference in the findings by different worksusing the symmetrical cylinder was found to be mostly due to the extent of misalignment of therod in the cylinder.

Place, publisher, year, edition, pages
Springer, 2017.
Keywords [en]
Rotating method, Radial flow, Dissolution mechanism
National Category
Metallurgy and Metallic Materials
Research subject
Materials Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-214594OAI: oai:DiVA.org:kth-214594DiVA, id: diva2:1141952
Projects
European Union’s Research Fund for Coal and Steel (RFCS) research program [grant agreement No RFSR-CT-2015-00005].
Funder
EU, European Research Council, RFSR-CT-2015-00005
Note

QCR 20170918

Available from: 2017-09-18 Created: 2017-09-18 Last updated: 2017-09-18Bibliographically approved
In thesis
1. A Study on the Reaction between MgO Based Refractories and Slag-Towards the Development of Carbon-free Lining Material
Open this publication in new window or tab >>A Study on the Reaction between MgO Based Refractories and Slag-Towards the Development of Carbon-free Lining Material
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In present thesis, the fundamental studies on the reaction between MgO based refractories and slag were undertaken for the development of a carbon-free bonding MgO lining material. Alumina was selected as a potential binder material. Due to MgO-Al2O3 chemical reaction, the developed refractory was bonded by MgO·Al2O3 spinel phase. To begin with, an investigation of the dissolution process of dense MgO and MgO·Al2O3 spinel in liquid slag was carried out. To obtain reliable information for dissolution study, a new experimental method was therefore developed. In this method, a cylinder was rotating centrally in a special designed container with a quatrefoil profile. This method also showed a good reliability in revealing the dissolution mechanism by quenching the whole reaction system. The experimental results showed that the dissolution process of MgO and spinel was controlled by both mass transfer and chemical reaction. It was found that the rapid dissolution of spinel was mainly because of its larger driving force. To improve the resistance against slag penetration, two aspects were studied to develop carbon-free MgO refractory. First, colloidal alumina was used and the effect of its addition into MgO matrix was investigated. The use of colloidal alumina was to form bonding products in the grain boundary of MgO. The results showed that the alumina addition greatly improved the resistance of MgO based refractory against slag penetration in comparison with the decarburized MgO-carbon refractory. It was found that the improvement of resistance was mainly related to the spinel-slag reaction products of CaO·Al2O3 and CaO·MgO·Al2O3 solid phases at the grain boundaries. Second, the effect of particle size distribution on the penetration resistance of MgO was investigated. The most profound improvement against the slag penetration was obtained by using a proper particle size distribution. The results highlighted the importance of considering the refractory structure. Experiments were undertaken to investigate the dissolution mechanism of different types of MgO based refractories in liquid slag. It was observed that the dissolution of spinel bonded MgO refractory was much slower than the decarburized MgO-carbon refractory. The primary dissolution in spinel bonded MgO refractory occurred at the slag-penetrated layer, and the removal of this layer by peeling off enhanced the dissolution rate rapidly.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2017. p. 54
Keywords
MgO refractory, lining material, carbon-free, clean steel, ladle glaze, slag penetration, dissolution mechanism
National Category
Metallurgy and Metallic Materials
Research subject
Materials Science and Engineering
Identifiers
urn:nbn:se:kth:diva-214420 (URN)978-91-7729-533-4 (ISBN)
Public defence
2017-10-27, Sal F3, Lindstedtvägen 26, Stockholm, 10:00 (English)
Opponent
Supervisors
Projects
European RFCS LEANSTORY project
Funder
EU, European Research Council, RFSR-CT-2015-00005
Note

QC 20170918

Available from: 2017-09-18 Created: 2017-09-13 Last updated: 2017-09-21Bibliographically approved

Open Access in DiVA

Supplement 1(107152 kB)12 downloads
File information
File name FULLTEXT01.pdfFile size 107152 kBChecksum SHA-512
e283394e7dcb910b9dc0206fd07253be9ec49a1d095e843d08f6c559fd9f661e01b12a34d5b5c736ccc12ff5e553cd89d1c35497a558c5b4720606e5300d395f
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Wang, HuijunDu, Sichen
By organisation
Materials Science and EngineeringMicro-Modelling
In the same journal
Metallurgical and materials transactions. B, process metallurgy and materials processing science
Metallurgy and Metallic Materials

Search outside of DiVA

GoogleGoogle Scholar
Total: 12 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

urn-nbn

Altmetric score

urn-nbn
Total: 43 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