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 (T₂)	≥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: Can insulating fire bricks be used in the construction of rotary kilns?: Yes, insulating fire bricks can be used in the construction of rotary kilns. These bricks are designed to provide thermal insulation and are commonly used in high-temperature applications such as kilns. Insulating fire bricks can help to reduce heat loss, increase energy efficiency, and ensure consistent and uniform temperature distribution within the rotary kiln.

Q: Can insulating fire bricks be used in the insulation of walls and roofs?: Insulating fire bricks are primarily designed for use in high-temperature applications such as kilns, furnaces, and fireplaces. While they are excellent at withstanding extreme heat, they may not be the best choice for insulation in walls and roofs. Insulating fire bricks have a high thermal resistance, which means they can effectively reduce heat transfer. However, they are not as effective in preventing air infiltration or providing a high level of insulation compared to other materials specifically designed for building insulation. For insulation purposes in walls and roofs, it is more common to use materials such as fiberglass, mineral wool, foam boards, or spray foam insulation. These materials have better insulating properties and are specifically engineered to provide thermal resistance, air sealing, and moisture control. If you are considering using insulating fire bricks for wall or roof insulation, it is important to consult with a professional who can assess your specific needs and recommend the most suitable materials for your project.

Q: Do insulating fire bricks require special storage conditions?: Insulating fire bricks do not necessarily require special storage conditions, but it is recommended to store them in a dry, cool, and well-ventilated area. These bricks are made of lightweight materials that are designed to resist high temperatures and insulate heat. However, excessive moisture or exposure to extreme temperatures may affect their performance and durability. It is advisable to protect the bricks from direct sunlight or rain, as prolonged exposure to these elements might cause damage. Additionally, storing the bricks in an organized manner, away from sharp objects or heavy loads, can prevent any potential breakage or deformation. Overall, while special storage conditions may not be mandatory, taking proper precautions can help preserve the quality and longevity of the insulating fire bricks.

Q: Are insulating fire bricks resistant to acids?: Insulating fire bricks, also known as refractory bricks, are generally resistant to acids. These bricks are made from high temperature-resistant materials such as silica, alumina, and other refractory oxides, which provide excellent resistance to chemical attack. However, it is important to note that the level of acid resistance can vary depending on the specific composition and manufacturing process of the insulating fire bricks. It is recommended to consult the manufacturer or supplier for detailed information about the acid resistance of the specific type of insulating fire bricks being used.

Q: Can insulating fire bricks be used in biomass boilers?: Indeed, insulating fire bricks are applicable in biomass boilers. These bricks are specifically engineered to possess minimal thermal conductivity, thereby aiding in the preservation of heat within the boiler and augmenting its overall efficiency. When employed in biomass boilers, these bricks function as linings for the combustion chamber, effectively confining the heat and preventing its dissipation. Moreover, insulating fire bricks exhibit exceptional resistance to elevated temperatures, rendering them suitable for use in biomass boilers where combustion temperatures can soar to several hundred degrees Celsius. Ultimately, the utilization of insulating fire bricks in biomass boilers serves to heighten their thermal efficiency, thereby lending support to a more proficient and sustainable energy production process.

Q: Do insulating fire bricks have a high insulating capacity?: Insulating fire bricks possess a remarkable capacity for insulation. Crafted with utmost precision, these bricks exhibit exceptional thermal insulation characteristics, rendering them exceptionally proficient in obstructing heat transfer. Their composition entails lightweight materials like ceramic fibers, known for their minimal thermal conductivity. Consequently, insulating fire bricks adeptly capture and maintain heat, effectively thwarting its escape and ensuring adequate insulation of the surrounding space. Owing to their superior insulating capacity, these bricks find extensive utilization in domains that prioritize heat retention and energy efficacy, including furnaces, kilns, and fireplaces.

Q: Can insulating fire bricks be used in reheating furnaces?: Yes, insulating fire bricks can be used in reheating furnaces. They are designed to withstand high temperatures and provide excellent insulation, making them suitable for use in heating and reheating applications.

Q: Can insulating fire bricks be used in DIY projects?: Certainly, DIY projects can make use of insulating fire bricks. With their lightweight and superb thermal insulation properties, these bricks prove suitable for a range of applications. They find common use in the construction of wood-fired ovens, fire pits, kilns, and even forge walls. Insulating fire bricks possess the ability to endure high temperatures and resist thermal shock, thus providing a dependable option for heat-resistant structures crafted by DIY enthusiasts. Furthermore, they offer ease of cutting and shaping, enabling customization to align with specific project requirements.

Q: Are insulating fire bricks resistant to carbon monoxide?: Yes, insulating fire bricks are resistant to carbon monoxide. These bricks are specifically designed to withstand high temperatures and are commonly used in applications where exposure to intense heat and chemicals, such as carbon monoxide, is expected. The insulating properties of these bricks make them highly resistant to heat transfer, allowing them to maintain their structural integrity in the presence of carbon monoxide and other combustion gases. This resistance to carbon monoxide makes insulating fire bricks an ideal choice for applications such as furnaces, kilns, and other high-temperature environments where the risk of carbon monoxide exposure is present.

Q: Can insulating fire bricks be used in lime plants?: Indeed, insulating fire bricks have the capability to be utilized in lime plants. These bricks are uniquely crafted to possess a remarkably low thermal conductivity, thus enabling them to effectively impede the transfer of heat. In the context of lime plants, where elevated temperatures are necessary for the calcination process, insulating fire bricks can be employed to line the kilns and other zones exposed to high temperatures. By doing so, these bricks aid in the preservation of heat within the lime kilns, resulting in a reduction of energy loss and an enhancement of overall efficiency. Furthermore, insulating fire bricks possess resistance against chemical attacks and are able to endure the harsh conditions experienced in lime plants, rendering them a suitable and appropriate choice for this particular application.

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