• Cordierite-mullite Refractory Brick System 1
Cordierite-mullite Refractory Brick

Cordierite-mullite Refractory Brick

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Specifications

Cordierite-mullite brick
1. low thermal expansion coefficient,
2. excellent stability of thermal shocking

Alumina-Silica Refractory Series Products

Cordierite-mullite brick is of low thermal expansion coefficient, excellent stability of thermal shocking, it is used in assembly brick for hot blast stove.
Sintered mullite brick mineral component is mullite phase. It has the advantage of high temperature structural strength, strong resistance to chemical corrosion. It is used in the lining of high temperature kiln.
Silimanite bricks possesses the better refractoriness temperature under load and the good stability of thermal shocking. It is mainly used in the blast furnace, wind pipe of the blast heating cupola, the lime kiln, the discharging channel and cover board of the glass melting kiln.

Physical and chemical index :

Sillimanite Bricks
Cordierite brick
Corundum-Mullite Brick
Cordierite-Mullite Brick
M-68
M-72
GCS
JQS
AM-75
AM-80
JM
Al2O3 %
≥68
72
≥55
55±5
≥75
≥80
≥50
Fe2O3 %
≤1.5
≤1.5
≤1.5
≤1.5
≤2
MgO %
2.0
1.73~3
SiO2 %
≤45
Apparent Porosity %
≤21
≤19
≤17
≤25
≤17
≤17
≤23
Bulk Density g/cm3
≥2.45
≥2.50
≥2.45
≥2.30
≥2.55
≥2.60
≥2.30
Cold Crushing
Strength Mpa
≥50
≥60
≥55
≥40
≥70
≥70
≥70
Modulus of
Rupture Mpa
≥15
≥15
0.2Mpa Refractoriness
Under Load T
0.6
≥1580
≥1600
≥1550
(T
2)
≥1400
≥1680
≥1700
Reheat liner change 2h
1450°C
±0.2
Thermal
Shock Resistances
100°C water cycles
≥15
≥100
20-1000°C
Thermal Expansich
10
-6/°C
4.5-4.9

Q:What is the recommended thickness of insulating fire bricks for optimal insulation?
The recommended thickness of insulating fire bricks for optimal insulation varies depending on the specific application and desired level of insulation. However, a typical range for insulating fire bricks is between 2.5 to 4 inches in thickness. It is important to consult with a professional or refer to specific guidelines to determine the ideal thickness for your specific insulation needs.
Q:Are insulating fire bricks resistant to fluorine gas?
Yes, insulating fire bricks are generally resistant to fluorine gas due to their refractory properties and ability to withstand high temperatures and chemical corrosion.
Q:Are insulating fire bricks resistant to sulfur dioxide?
In general, insulating fire bricks do not possess resistance against sulfur dioxide. This highly corrosive gas can undergo reactions with the components of insulating fire bricks, resulting in their deterioration and diminished efficiency. Therefore, it is crucial to utilize refractory materials that are specifically engineered to endure exposure to sulfur dioxide, whenever such a requirement exists for the intended application.
Q:What is the typical moisture content of an insulating fire brick?
The typical moisture content of an insulating fire brick is usually less than 1%.
Q:Do insulating fire bricks expand and contract with temperature changes?
Yes, insulating fire bricks do expand and contract with temperature changes.
Q:Can insulating fire bricks be used in the construction of lime kilns?
Yes, insulating fire bricks can be used in the construction of lime kilns. Insulating fire bricks are designed to have low thermal conductivity, which means they have excellent insulation properties. This makes them suitable for use in lime kilns, where high temperatures are required for the calcination process. Lime kilns operate at temperatures ranging from 900 to 1200 degrees Celsius, and the intense heat generated during this process must be contained within the kiln to ensure efficient and effective lime production. Insulating fire bricks help to achieve this by reducing heat loss through the kiln walls, allowing for higher energy efficiency and lower operating costs. Additionally, insulating fire bricks are lightweight and easy to handle, making them convenient for construction purposes. They can be easily shaped and cut to fit the specific requirements of the lime kiln design, ensuring a tight and secure fit. Furthermore, insulating fire bricks have good resistance to thermal shock, which is crucial in lime kilns where rapid temperature changes occur during the firing process. This resistance helps to prevent cracking and structural damage, ensuring the longevity and durability of the kiln. In summary, insulating fire bricks are a suitable choice for the construction of lime kilns due to their low thermal conductivity, lightweight nature, ease of shaping, and resistance to thermal shock.
Q:Are insulating fire bricks resistant to chemical attack?
Yes, insulating fire bricks are generally resistant to chemical attack. These bricks are made from high-purity refractory materials, such as alumina or silica, which have excellent chemical stability. They are designed to withstand high temperatures and are thus highly resistant to the corrosive effects of chemicals. However, it is important to note that the degree of chemical resistance can vary depending on the specific composition of the insulating fire brick and the type of chemical being used. In some cases, certain aggressive chemicals may still cause some degree of degradation or erosion over time. Therefore, it is always recommended to consult the manufacturer or supplier for specific information regarding the chemical resistance of insulating fire bricks in relation to the intended application.
Q:Can insulating fire bricks be used in ladles and tundishes?
Insulating fire bricks prove to be suitable for ladles and tundishes as they are specifically designed to offer high-temperature insulation and thermal stability. These bricks are essential in applications where heat retention plays a pivotal role. Ladles and tundishes are extensively utilized in the steel and foundry sectors for the transportation and pouring of molten metal. By utilizing insulating fire bricks in these vessels, one can effectively minimize heat loss and maintain the desired temperature of the metal. Moreover, these bricks exhibit resilience towards thermal shock and chemical corrosion, which are common obstacles in such extreme temperature environments. Consequently, the utilization of insulating fire bricks in ladles and tundishes ultimately enhances energy efficiency, reduces heat loss, and improves the overall performance and lifespan of these vital pieces of equipment in the metal processing industry.
Q:Can insulating fire bricks be used in the construction of lime production linings?
Yes, insulating fire bricks can be used in the construction of lime production linings. Insulating fire bricks are designed to have low thermal conductivity, which makes them excellent for applications where heat insulation is required. In lime production, high temperatures are required for the calcination process. Using insulating fire bricks in the construction of lime production linings helps to reduce heat loss and improve energy efficiency. Additionally, insulating fire bricks are lightweight and easy to handle, which makes them suitable for lining various parts of lime kilns and other equipment used in the lime production process. Overall, using insulating fire bricks in lime production linings can help to optimize the production process and improve the overall performance of lime production facilities.
Q:What is a heat insulating brick?
The insulation brick integrates the excellent heat preservation effect into the wall while building the wall. Low thermal conductivity, high strength, strong durability, simple construction, light weight, easy loading and unloading, economic, green, environmental protection, sound insulation, fire protection and so on.

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