The difference between fused zirconium corundum bricks and fused corundum bricks

The difference between fused zirconium corundum bricks and fused corundum bricks

Fused zirconium corundum brick(fused cast AZS brick)

Fused zirconium corundum brick AZS33#:

The dense microstructure of AZS33# zirconium corundum bricks makes the bricks highly resistant to erosion by glass liquid and is not prone to stones or other defects in the glass kiln. It is the most widely used product in glass kilns and is mainly suitable for the upper structure of the melting pool, the wall bricks and pavement bricks of the working pool, the feed channel, etc.

AZS33 is the most widely used and widely used tea product among the cast AZS series products, and has superior performance in preventing contamination of the glass liquid. It is widely used in the tank wall, tank bottom, upper structure and feed channel of glass kiln.

Fused zirconium corundum brick AZS36#:

In addition to having the same eutectic body as the AZS33# fused zirconium corundum brick, the 36# AZS brick has more chain-like zirconia crystals and a lower glass phase content, so the 36# fused zirconium corundum brick has better corrosion resistance. The performance is further enhanced, so it is suitable for areas with fast flow rate of glass liquid or high temperature.

AZS36 s is a product with excellent performance among the melt-cast AZS series products. It has high resistance to glass liquid erosion and low pollution characteristics. It is usually used in key parts such as the pool wall near the hot spot of the melting pool of a glass melting furnace.

Fused zirconium corundum brick AZS41#:

In addition to the eutectic of silicon oxide and alumina, AZS41# fused zirconium corundum brick also contains more uniformly distributed zirconium oxide crystals. Among the zirconium corundum brick systems, its corrosion resistance is the best. Therefore, key parts of the glass furnace are selected so that the life of these parts is balanced with other parts.

AZS41 is the product with the best performance among the cast AZS series products. It has extremely high resistance to glass liquid erosion and extremely high glass phase seepage temperature, and has extremely low pollution to the glass liquid. It is widely used in the hot spots of glass furnaces such as the wall of the tank, the corner of the feeding port, the liquid hole, the kiln sill, the bubble at the bottom of the tank and the all-electric melting furnace.

2. Fused corundum brick

Fused corundum bricks are made by melting alumina in an electric arc furnace and casting it into a model of a specified specific shape. After annealing and heat preservation, the required product is obtained by processing with diamond abrasive tools. This product is divided into three types according to the different crystal forms and quantities of alumina. The first type is based on α-Al2O3 as the main crystal phase, which is called α corundum brick; the second type is based on α-Al2O3 and β-Al2O3 The main crystal phase is basically 1:1, and the α phase content is slightly higher, which is called α, β corundum brick; the third type is mainly β-Al2O3 crystal phase, which is called β corundum brick.

This product mainly has α-Al2O3 and β-Al2O3 crystal phases, with a content of about 50% each. The product has dense crystallization and has excellent corrosion resistance to glass liquid below 1350 degrees. Therefore, it is widely used in glass furnace working tanks and beyond. Parts, usually used parts are chute, lip brick, gate brick, etc.

Although these two fused brick products have similarities, they belong to different types of products, and they are essentially different contents. Only by understanding them properly can we use them better.