Corrosion mechanism of Al2O3–SiC–C refractory by SiO2–MgO-based slag
Source abstract
Abstract
Abstract The development of high value-added products prepared by slag has been restricted by the severe damage to refractories occurring during SiO2–MgO-based slag melting. In the current study, the Al2O3–SiC–C refractories were selected to conduct static resistance tests with SiO2–MgO-based slag in air and reducing atmospheres. The results show favorable corrosion resistance but poor permeability resistance in both atmospheres. The poor permeability can be attributed to the cracking of brown fused alumina aggregates caused by volume expansion during the formation of magnesium aluminate spinel. In addition, a model of crack growth for the aggregate is proposed to illustrate the corrosion mechanism of the Al2O3–SiC–C refractories. It is indicated that the crack growth of the aggregate proceeds mainly along the normal direction based on the calculation of the radial and normal lengths of the crack.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Concrete and Cement Materials Research · Bauxite Residue and Utilization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (28)
Show source-provided references
1. Cadmium distribution in Pb-Zn slags from Upper Silesia, Poland: implications for cadmium mobility from slag phases to the environment10.1016/j.gexplo.2017.12.001 ↗
2. Shrinkage behavior of alkali-activated slag cement pastes10.4028/www.scientific.net/KEM.761.45 ↗
3. Fly ash and slag utilization for the Serbian railway substructure
4. Energy-environment-economy evaluations of commercial scale systems for blast furnace slag treatment: dry slag granulation vs. water quenching10.1016/j.apenergy.2016.03.079 ↗
5. Isolation or corrosion of microporous alumina in contact with various CaO-Al2O3-SiO2 slags10.1016/j.corsci.2017.01.018 ↗
6. An approach for matrix densification based on particle packing and its effect on lightweight Al2O3-MgO castables10.1016/j.ceramint.2016.08.197 ↗
7. Effects of aggregate microstructure on slag resistance of lightweight Al2O3-MgO castable10.1016/j.ceramint.2017.09.033 ↗
8. Influence of grain phase on slag corrosion of low-cement castable refractories10.1111/j.1151-2916.2001.tb00672.x ↗
9. Computational modeling and prediction on viscosity of slags by big data mining10.3390/min10030257 ↗
10. Influence of β-sialon/Ti(C, N) powders on the corrosion and oxidation resistance of zero-cement Al2O3-SiC-C refractory castables10.1080/0371750X.2014.987404 ↗
11. Oxidation kinetics of bauxite-based β-SiAlON with different particle sizes10.1016/j.corsci.2020.108446 ↗
12. Growth mechanism and synchronous synthesis of 1D β -sialon nanostructures and β-sialon-Si3N4 composite powders by a process of reduction nitridation10.1088/2053-1591/ab0e2f ↗
13. Study on physicochemical properties of Al2O3-SiC-C castable for blast furnace10.1016/j.ceramint.2019.04.088 ↗
14. Micro-nano carbon structures with platelet, glassy and tube-like morphologies10.3390/nano9091242 ↗
15. Influence of graphite type on the properties of Al2O3-SiC-C castables
16. Research of Al2O3-SiC-C refractories as chromia-free lining for gasifier10.1016/j.ceramint.2016.06.038 ↗
17. Rapid synthesis of ZrB2-B4C composite powders via induction heating and its effect on the properties of Al2O3-SiC-C castables10.1016/j.jallcom.2018.06.375 ↗
18. Blast furnace maintenance
19. Direct and indirect slag corrosion of oxide and oxide-c refractories
20. Bird · 2002
21. Levich · 1962 · 373
22. Eisenhüttenleute · 1995
23. Elliott · 1963 · 547
24. The corrosion of refractory castables
25. Dissolution of alumina particles in CaO-Al2O3-SiO2-MgO slags10.1179/030192302225001965 ↗
26. Dissolution behavior of Al2O3 and MgO inclusions in the CaO-Al2O3-SiO2 slags: formation of ring-like structure of MgAl2O4 and Ca2SiO4 around MgO inclusions10.2355/isijinternational.46.1626 ↗
27. Resistance of Al2O3-Si3N4-SiC composite to BF slag and alkali vapor
28. Temperature dependence of bulk modulus and shear modulus for MgO and other minerals