Refractory Bricks
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AZS Brick

AZS brick is used as refractory materials for high temperature and erosion resistant kilns such as glass industrial pool kilns, glass electric kilns, slides in the steel industry, and kilns in the soda ash industry.

  • ZrO2%: ≥ 16
  • Fe2O3%: ≤ 0.5
  • Bulk Density (g/cm³): ≥ 2.70
  • Cold Crushing Strength/MPa: ≥ 70
  • Apparent Porosity/%: ≤ 20
  • Sample: testing of sample is available

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Description of AZS Brick

Fused bricks, also known as fused zirconia corundum bricks, are abbreviated as AZS, which are arranged in the order of their content according to the three chemical components of the Al2O3-ZrO2-SiO2 ternary system phase diagram. AZS is abbreviated from "A" of Al2O3, "Z" of ZrO2 and "S" of SiO2, according to JC/T industry standard.For example, No. 33 fused zirconia corundum refractory brick is referred to as "AZS-33#", No. 36 fused zirconia corundum refractory brick is referred to as "AZS-36#", and No. 41 fused cast zirconia corundum refractory brick is referred to as "AZS-41#" .

kerui azs brick

azs brick supplier

azs brick manufacturer


Classification and Application of AZS Bricks


AZS-33 Brick

  • Al2O3: 50%
  • ZrO2: 32.5%
  • Volume Density: 3.75g/cm³
  • Cold Crushing Strength: 200MPa

AZS-33 has good corrosion resistance to liquid glass, is not easy to produce stones or other defects, and has low possibility of producing small bubbles. Therefore, AZS-33 bricks are widely used in glass kilns, mainly applicable to the upper structure of the melting pool, the pool wall bricks and paving bricks of the working pool, and the material channel.



AZS-36 Brick

  • Al2O3: 49%
  • ZrO2: 35.5%
  • Volume Density: 3.85g/cm³
  • Cold Crushing Strength: 200MPa

In addition to having the same eutectic body as the AZS33 brick, AZS36 brick is suitable for areas with high liquid glass flow rate and high temperature, such as melting pool wall bricks, paving bricks, charging port bricks, etc., because of the increase of more interlocking zirconia crystals and the decrease of glass phase content.



AZS-41 Brick

  • Al2O3: 45%
  • ZrO2: 40.5%
  • Volume Density: 4.00g/cm³
  • Cold Crushing Strength: 200MPa

AZS41 is the most excellent product in the melting and casting AZS series, with extremely high resistance to liquid glass corrosion and extremely high glass phase seepage temperature. It is widely used in key parts such as tank wall, feeding inlet corner, flow hole, kiln ridge, tank bottom bubbling and all electric melting furnace at the hot spot of glass furnace.


Kerui AZS Brick Technical Data Sheet

SiO2, %121315
Al2O3, %The RemainderThe RemainderThe Remainder
ZrO2, %4136.533.5
Bulk Density, g/cm34.053.93.8
Apparent Porosity, %
Initial Precipitation Temperature of Vitreous Phase, ℃140014001400
Vitreous Phase Exudation, %
Anti-molten Glass Erosion Speed Under Static Condition, mm/24h
(1500℃*36h, ordinary soda lime glass)
Bubble Release Rate, %
(1300℃*10h, ordinary soda lime glass)

Advantages of AZS Brick

1. High Temperature Resistance

AZS bricks can withstand extremely high temperatures, usually exceeding 1700 degrees Celsius, even reaching more than 2000 degrees Celsius. This makes it ideal for working in high temperature environments.

2. Excellent Corrosion Resistance

In the fields of glass manufacturing, metallurgy, and chemical industry, Kerui sintered AZS refractory products can withstand the erosion of corrosive media for a long time and prolong the service life of equipment.

3. High Softening Temperature

Zirconium products have high zirconia and alumina content, and sintered AZS bricks have low impurity content. The load softening temperature of aluminum-zirconium products can be above 1550-1650°C.

4. Strong Slag Resistance

The high content of A1203 in sintered AZS bricks makes it close to neutral refractory materials, so it can effectively resist the erosion of corrosive substances such as acidic slag and alkaline slag at high temperatures.

5. Good thermal shock stability

Kerui AZS bricks have excellent thermal shock stability. This means that it is able to reduce thermal stress and damage caused by thermal shock, maintaining structural integrity under rapid temperature changes.

6. High Strength

AZS bricks have high strength and can resist physical and mechanical stress. At the same time, it also has excellent wear resistance and can maintain its integrity and durability in high-temperature and pressure environments.

7. Low Permeability

AZS bricks have low permeability characteristics and can effectively resist the penetration of liquids and gases, ensuring their stability and significantly extending the service life of the equipment. This low penetration makes it a reliable choice.

azs brick application
azs brick in glass kiln

Production Process of AZS Bricks

  • We have our own factory with professional technical team and production equipment.
  • With Fully automatic batching system; 20 sets of 400-1000 ton forming presses; 2 * 168m high-temperature tunnel kilns; 20000㎡ storage workshop.
  • Ensure product quality, improve production efficiency, and provide customers with the most satisfactory products and services.

    Certificates of Kerui Refractory

    Kerui Group has a number of international certifications, such as, ISO9001/ISO14001/OHSAS18001/CE/SGS. Besides, Kerui’s products also have many domestic certificates, the quality is very guaranteed, and they have been unanimously recognized by customers at home and abroad.


    Kerui Refractory Products Packaging & Shipment

    The entire delivery process is tracked, and Kerui’s expert team solves specific project needs with the utmost professionalism. If the customer’s project requires it, Kerui’s expert team will go to the customer’s country to provide face-to-face technical support.

    AZS packing

    Customer Cases Of KERUI Refractory

    Besides mainland China, Kerui Refractory has exported products to more than 50 countries and regions across 5 continents across the world, including Asia, Europe, America, Africa and Oceania. We have received recognition and high praise from customers all over the world, and are constantly receiving customers’ return orders and referrals.

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