What are the changes of zirconium corundum in the glass kiln?

Fused cast zirconium corundum brick is mainly composed of alumina, zirconia and silicon dioxide, which is abbreviated as AZS, which represents the first letter of the main composition. During production, aluminum oxide, zirconia and silicon dioxide are put into the electric furnace, which is then cooled by injection mold. The lithofacies structure is composed of the eutectoid and the glass phase of corundum and zirconium plagioclase, and the glass phase is filled in between the two crystals. Fused cast zirconium corundum brick is used for the construction of glass kiln. Different models have different components, which can be used for the construction of different parts of glass kiln. The glass kiln in use will bear the high temperature of thousands of degrees. Under the severe test, what changes will be made to the fused cast zirconium corundum bricks?

Fused cast zirconia-alumina materials in glass kiln is a crystallization process, first in baddeleyite a baddeleyite precipitate out of crystal space, and then in baddeleyite and zirconium corundum eutectoid online precipitate eutectic, the precipitation is the glass phase and the rest of the crystal. The glass phase is one of the structure of fused cast zirconia corundum brick. On the one hand, it can reduce the melting temperature, expand the casting temperature range, and loosen the thermal stress. But it is also the weak link of fused cast zirconium corundum brick, which reduces the corrosion resistance of materials.

The fused cast zirconia corundum brick will be gradually eroded in the glass kiln. The glass phase will be replaced by the glass furnace glass first, and the corundum will dissolve to slow the erosion rate of the brick. When the corundum is exhausted, the molten refractory begins to disintegrate, and the slanted zircon goes into the kiln and becomes a stone. If was not be dissolved after the blending of refractory component, will form stripes, stripes and glass components are different, can affect the degree of dissolved gas, separating out air bubbles will bring adverse effect ACTS on the output quality of the glass; Stones and stripes also affect the quality of the glass.