From the performance introduction of the above-mentioned network corundum mullite brick and Recombination brown corundum brick, it can be seen that the physical and chemical indexes of the improved second generation of low gas hole type corundum mullite brick and the fourth generation of hole making composite brown corundum brick have reached a considerable level, and the excellent performance of the two products mainly depends on the microstructure.
Corundum mullite brick mainly uses the characteristics of crystal structure of fused white network corundum and fused mullite to add a variety of composite additives in the matrix. Under the high temperature action, the main crystal phase is network corundum, and the sub crystal phase is lingcolumnar mullite. The main crystal phase piles up with each other to form a skeleton sub crystal phase interpenetrated between the main crystal phase and a variety of composite additives. The matrix is filled in the chain network of the main sub crystal phase In the empty part of the frame, the ceramic material forms a whole structure of close and firm combination, so as to achieve its excellent physical and chemical properties.
The composite brown corundum brick mainly uses the crystal structure characteristics of fused Brown mesh jade to play a skeleton role in the products. The raw β - SiC and brown mesh King particles together make the products form a universal solid structure, so as to achieve the ideal physical and chemical indexes. Not only the products have high mechanical properties, but also the β - SiC phase formed by the mesh blocks the pores, making the products dense and low porosity, which is the excellent property of the raw material itself The result of the best combination of energy.
The main ways to realize the above properties of corundum mullite broken brick and composite brown corundum brick are different, which will lead to the difference in serviceability. It can be seen from the test results that: the corundum mullite brick is almost non corrosive, the corundum mullite brick is inferior to the corundum mullite brick, and the slag erosion index of the composite corundum brick is more than 8%, and the resistance of the composite corundum mullite brick to hot metal erosion is better than that of the composite corundum brick. The reason for this kind of love must be different from that of the two raw materials There is a close relationship with.
