Types of Fused Zirconia Corundum Bricks and Their Main Applications

As the saying goes, the insider knows the ropes, while the outsider just comes along for the ride. It is believed that people who frequently contact or use fused zirconia corundum bricks can easily distinguish their models. But for those who are not familiar with fused zirconia corundum bricks, this may be slightly more difficult. Refractory manufacturers will take everyone to understand the model classification of fused zirconia corundum bricks and explain in detail the specific use parts.

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Structural characteristics of fused zirconia corundum bricks

Fused zirconia corundum brick is a white solid formed by using pure alumina powder and zircon sand containing 65% zirconia and 34% silica after being melted in an electric furnace and injected into the mold to cool. The lithofacies structure is composed of the eutectoid of corundum and zirconite and the glass phase. In terms of phase science, it is the eutectoid of the corundum phase and zirconite phase, and the glass phase is filled between their crystals.

Types of fused zirconia corundum bricks and their main use parts

Fused zirconia corundum bricks are also called AZS fused zirconia corundum bricks, AZS bricks, fused cast AZS bricks, etc. The English abbreviation is AZS. It is arranged in the order of the three chemical components in the phase diagram of the Al2O3-ZrO2-SiO2 ternary system. Al2O3 is A, ZrO2 is Z, SiO2 is S, and the standard uses the abbreviation "AZS". For example, No. 33 fused-cast zirconium corundum brick is abbreviated as AZS33#, No. 36 fused-cast zirconium corundum brick is abbreviated as AZS36#, and No. 41 fused-cast zirconium corundum brick is abbreviated as AZS41#. Among them, 33, 36, 41 are named according to the content of alumina (Al2O3). For example, fused zirconia corundum brick AZS41# refers to fused zirconia corundum brick with 41% alumina content, and fused zirconia corundum brick AZS36# refers to fused zirconia corundum brick with 36% alumina content. The zirconia corundum brick AZS33# refers to the fused zirconia corundum brick with an alumina content of 33%. Next, let's understand them separately.

Fused Zirconia Corundum Brick AZS33#

AZS33# zirconium corundum brick, its compact microstructure makes the brick have good resistance to glass liquid corrosion, and it is not easy to produce stones or other defects in the glass furnace. It is the most widely used product in glass furnaces. It is mainly suitable for the upper structure of the melting pool, the pool wall and paving bricks of the working pool, and the material channel.

AZS33# is the most widely used and most widely used product in the fusion cast AZS series, and it has an excellent performance in preventing pollution of glass liquid. It is widely used in the wall, bottom, upper structure, and feeding channel of the glass furnace.

Fused Zirconia Corundum Brick AZS36#

Except that it has the same co-crystal in vitro as AZS33# fused zirconia corundum brick. 36#AZS bricks have more chain-like zirconia crystals and lower glass phase content, so the corrosion resistance of 36# fused zirconia corundum bricks has been further enhanced. Therefore, it is suitable for areas where the flow rate of glass liquid is faster or the temperature is higher.

AZS36# is a product with excellent performance in the cast AZS series. It has high resistance to glass liquid corrosion 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 the glass melting furnace.

Fused Zirconia Corundum Brick AZS41#

AZS41# fused zirconia corundum brick contains more uniformly distributed zirconia crystals in addition to the eutectic of silica and alumina. In the zirconium corundum brick system, its corrosion resistance is the best. Therefore, the key parts of the glass furnace were selected to balance the life of these parts with other parts.

AZS41 is the most excellent product in the fusion cast AZS series. It has extremely high resistance to glass liquid corrosion and extremely high glass phase exudation temperature, and it has very low pollution to glass liquid. It is widely used in the key parts of the hot spot of the glass furnace, such as the wall of the glass furnace, the corner of the feeding port, the liquid hole, the sill, the bubbling at the bottom of the tank, and the all-electric melting furnace.

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