The use Precautions of Sunrise Refractory Fused Zirconia Cor

The fused zirconium corundum brick is divided into three grades according to the content of ZrO2, and the corresponding grades are: AZS-33 (including ZrO233%), AZS-36 (including ZrO236%), and AZS-41 (including ZrO241%).

 

The fused zirconium corundum brick is mainly composed of zircon and industrial alumina, and a small amount of zirconium-rich sand (in order to increase the content of ZrO2), soda ash and borax. According to the different atmospheres during melting, there are two kinds of reduction melting method and oxidative melting method. At present, the oxidation method is mainly used. The oxidative melting method can remove the pollution of the graphite electrode in the molten liquid, and the carbon content is low (0.005% 0.02%), which can reduce the bubble content in the glass and improve the quality of the molten glass.

 

The following precautions for the use of fused zirconia corundum bricks are as follows.

 

1. Irregular change of thermal expansion

 

The fused zirconia corundum brick is characterized by stable and compact structure and strong resistance to glass liquid.

2.Electrical insulation

 

The fused zirconium corundum brick has good electrical insulation and decreases with the increase of temperature. In the production of soda-lime glass melting furnace, the electro-fused zirconium corundum brick can be used for the electrode brick.

 

3. Thermal conductivity

 

The thermal conductivity of fused zirconium corundum bricks is twice that of clay bricks. Therefore, when making a brick wall, the amount of cooling air required near the liquid surface should be twice as large as that of the clay brick.