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Brief analysis of hot-selling electric fusion and AZS brick
2019-12-25 16:15:51Electrofusion recombination AZS bricks are made by melting AZS clinker, scraps or recycled residual bricks (removing adhered glass) as raw materials, and adding a small amount of kaolinite or alumina as a binder. When heated to high temperature, the fused AZS aggregate exudates the glass phase and the binder forms mullite, which promotes the product to sinter. The peritectic reaction of the glass and crystal phases in the fused AZS aggregate will also form mullite.
At this time, the mullite and ZrO2 are wrapped and wrapped, which is helpful for sintering of AZS particles of different sizes. The "self-sinterability" of fused AZS aggregate is the basic principle for the production and recombination of AZS bricks.
The microstructural changes of high-temperature firing electrofusion combined with AZS bricks are mainly:
① The coarse-grained glass phase exudates to the surface of the particles and reacts with AI2O3, forming a mullite shell to close the exudation channel so that the peritectic reaction proceeds inside the particles;
② The glass phase of fused AZS powder reacts with active AI2O3, and the matrix is mullite. The microstructure of the combined AZS brick has the structural characteristics of dense combination of mullite and corundum zirconia eutectic.
