Abstract
Addressing increased damage to hot metal ladle refractory linings from FeOx of scrap steel, Al2O3–SiC–C refractories were prepared at 1400 °C with corundum, SiC, graphite as raw materials, and fused magnesia as additives. The impacts of additives on phase changes, microstructure, and properties were researched. The findings indicate that the oxide layer of Al2O3–SiC–C refractories with in-situ generated MgAl2O4 is denser than that of the blank sample after the oxidation test. This denser layer effectively inhibits the diffusion of O2, leading to a significant enhancement in oxidation resistance. After the corrosion test, it was observed that a part of Al2O3 was wrapped by Mg(Al, Fe)2O4 at the interface between the sample with generated in-situ MgAl2O4 and the slag. This structure can ensure the integrity of the material structure and fix some Fe2+ to weaken its corrosion to the refractory components, and its corrosion resistance is higher than that of the blank sample.
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