What changes will be made to the fused zirconium corundum in the glass furnace?

The main components of the zirconia corundum bricks are alumina, zirconia and silica, abbreviated as AZS, which means the English initials of the main components. In the production, alumina, zirconia and silica are placed in an electric furnace, and after melting, they are cooled by injection molding. The lithofacies structure consists of an eutectoid and a glass phase of corundum and zircon oblique, and the glass phase is filled between the two crystals. The fused zirconium corundum bricks are mostly used in the construction of glass kiln, and the different types of components are also different, which can be used for the construction of different parts of the glass kiln. The glass furnace in use will withstand thousands of degrees of high temperature. Under the harsh test, what kind of changes will be made to the cast zirconium corundum brick?

The molten cast zirconium corundum material will have a crystallization process in the glass kiln. First, the oblique zircon is precipitated in the crystallized space of the oblique zircon, and then the aluminum zirconium co-crystal is precipitated on the oblique zircon and corundum eutectoid line. It is the glass phase and the remaining crystals. As one of the fused structure of zirconium corundum brick, the glass phase can reduce the melting temperature, expand the casting temperature range and relax the thermal stress. However, it is also the weak link of the zirconia corundum brick, which reduces the corrosion resistance of the material.

 

The fused zirconium corundum brick will be gradually eroded in the glass kiln. The glass phase will be replaced by the kiln glass. The corundum will dissolve and slow down the erosion of the brick. After the corundum is exhausted, the fused refractory will begin to disintegrate. Zircon enters the kiln and becomes a stone. If the refractory component is not mixed after being dissolved, streaks will be formed, and the streak component and glass will be different, which will affect the solubility of the gas and cause the bubbles to precipitate, which will adversely affect the quality of the produced glass; And stripes will also affect the quality of the glass.