Corrosion Mechanism Analysis of Al2O3-SiC-C Castable

Chien Nan Pan

doi:10.4028/www.scientific.net/AST.92.258

Paper Titles

Mould Fluxes Viscosity and Surface Tension Influence on the Wear Mechanisms of Al₂O₃-C Nozzle
p.226

Simulation of Refractory Fracture as a Tool for Advanced Material Testing
p.232

Digital Image Correlation as a Tool for Monitoring Crack Networks on the Surface of MgO-Based Refractory Castables
p.242

Impact of Temperature and Oxygen Partial Pressure on Aluminum Phosphate in High Chrome Oxide Refractories
p.248

Corrosion Mechanism Analysis of Al₂O₃-SiC-C Castable
p.258

Study of Reactive Impregnation and Phase Transformations during the Corrosion of High Alumina Refractories by Al₂O₃-CaO Slag
p.264

Mechanisms of SiC Refractory High Temperature Corrosion by Molten Salts (Na,K,Ca,Cl,S) in Waste to Energy Facilities
p.272

Microstructures and Corrosion Mechanisms in MgO-C Bricks in Contact with High-Basicity and FeO-Rich Slags
p.282

Criteria to Select the Refractory Lining in Biomass Co-Combustion Reactors for Energy Production
p.288

HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 92Corrosion Mechanism Analysis of Al2O3-SiC-C...

Corrosion Mechanism Analysis of Al₂O₃-SiC-C Castable

Abstract:

The present study aims to analyze the corrosion mechanism of Al₂O₃-SiC-C castables for blast furnace main trough. The anti-oxidation and corrosion properties of the castable caused by slag were studied with residual lining investigation and microstructure analysis. A rapid recognition of grain distribution, ingredients, and mineral phases was achieved by using cathodoluminescence (CL) in conjunction with stereo microscopy. Different materials such as brown fused alumina, spinel, and low-melting CaO containing phases etc. can be detected due to their distinct fluorescence. The result indicated that when carbon in the matrix of castables was oxidized, its non-wetting property to slag was reduced, which causes slag penetrate into the castable and formed low-melting CaO containing phases. On the contrary, when the anti-oxidation property of castable was improved, the carbon in the matrix was not easily oxidized and corroded by slag. Furthermore, MgO of slag reacted with Al₂O₃ in the matrix to form a continuous spinel layer, which retarded slag to penetrate and corrode the castable.

You might also be interested in these eBooks

13th International Ceramics Congress - Part F

View Preview

Info:

Periodical:

Advances in Science and Technology (Volume 92)

Pages:

258-263

DOI:

https://doi.org/10.4028/www.scientific.net/AST.92.258

Citation:

Cite this paper

Online since:

October 2014

Authors:

Chien Nan Pan*

Keywords:

Blast Furnace, Castable, Cathodoluminescence, Corrosion, Slag Line, Spinel

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

* - Corresponding Author

References

[1] M. Iida, K. Ogura, Dissolution of Al2O3-SiC-C castables in blast furnace slag, Journal of the Technical Association of Refractories, Japan, 32.

Google Scholar

[1] (2012) 22-30.

Google Scholar

[2] M. Iida, E. Maeda and T. Okamoto, Effect of SiC oxidation on corrosion resistance of castable for metal line of blast furnace main trough, Journal of the Technical Association of Refractories, Japan, 27.

Google Scholar

[2] (2007) 90-95.

Google Scholar

[3] E. Maeda, Corrosion mechanism of slag-line materials in blast furnace main trough, Journal of the Technical Association of Refractories, Japan, 30.

Google Scholar

[2] (2010) 90-99.

Google Scholar

[4] M. Krarkus and R. E. Moore, Cathodoluminescence (CL) microscopy application to refractories and slag, Journal of Minerals & Materials Characterization & Engineering, 1.

Google Scholar

[1] (2002) 11-29.

Google Scholar

[5] W. E. Lee, S. Zhang and M. Karakus, Refractories: controlled microstructure composites for extreme environments, Journal of materials science 39 (2004) 6675-6685.

DOI: 10.1023/b:jmsc.0000045599.84988.9e

Google Scholar

[6] M. Krarkus, Cathodoluminescence properties of raw minerals used in refractory ceramics, Refractories Applications and News, 10.

Google Scholar

[5] (2005) 16-19.

Google Scholar

[7] Holleman, F. Arnold, W. Egon, W. Nils, Inorganic Chemistry, Academic Press, 2001, pp.810-811.

Google Scholar

[8] W. E. Lee and S. Zhang, Melt corrosion of oxide and oxide–carbon refractories, International materials reviews, 44.

Google Scholar

[3] (1999) 77-104.

Google Scholar