Silicon Nitride-Carborundum Fire Brick

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1. Characteristic

High strength

Low thermal expansion coefficient

Good thermal conductivity and thermal shock resistance

Good resistance to liquid aluminum erosion capability

High erosion

2. Applications

Widely used in large aluminum electrolytic cell of lining material. In the electrolytic aluminium industry, because of nitride bonded silicon carbide products can be made thin wall lining, enlarge the tank capacity, improve the thermal conductivity, can rapid cooling, and they are permitted to enter a higher power, increase the tank production capacity, at the same time, in its surface can form alumina and cryolite of eutectic content, in order to protect the tank lining work layer, prolong service life, therefore, this product is aluminum industry generally welcome.

3. Physical and Chemical Index of silicon nitride bonded silicon brick used in cooling stave

ITEM		INDEX
SiC %		72 Min
Si3N4 %		21 Min
Fe2O3 %		0.5 Max
Porosity %		18 Max
Bulk density g/cm3		2.65-2.70
Bending strength MPa	Room temperature °C	42
	1400 °C	45
CCS MPa		150 Min
Thermal conductivity w/m·k 1250 °C		15-18
Tolerance	0-100 mm	±1.0
	101-300 mm	±1.5
	301-500 mm	±2.0
	More than 500 mm	±0.5%
	Surface irregularity	0.2 Max
	Face verticality	0.5 Max
	Diagonal difference	2 Max

Q:Can insulating fire bricks be used in biomass power plants?: Yes, insulating fire bricks can be used in biomass power plants. These bricks are designed to withstand high temperatures and provide excellent insulation, making them suitable for lining furnaces and boilers in biomass power plants. They help to increase energy efficiency by minimizing heat loss, ensuring optimal combustion, and reducing the overall energy consumption of the plant.

Q:Can insulating fire bricks be used in high-temperature insulation for cryogenic applications?: Insulating fire bricks do not meet the requirements for high-temperature insulation in cryogenic applications. They are specifically designed to endure temperatures up to approximately 2300°F (1260°C), which falls significantly below the extremely low temperatures necessary for cryogenic applications. Cryogenic temperatures typically span from -150°C to -273°C (-238°F to -459°F), and insulating fire bricks lack the capability to offer sufficient insulation under these conditions. Instead, cryogenic insulation commonly relies on specialized materials like aerogels or multi-layered insulation systems to guarantee minimal heat transfer and sustain the extremely low temperatures demanded.

Q:Are insulating fire bricks resistant to moisture absorption?: Yes, insulating fire bricks are highly resistant to moisture absorption. They are designed to have low porosity and are made from materials that do not readily absorb water. This makes them ideal for applications where moisture resistance is crucial, such as in kilns, furnaces, and other high-temperature environments.

Q:Are insulating fire bricks resistant to thermal stress?: Yes, insulating fire bricks are designed to be highly resistant to thermal stress. They can withstand high temperatures without cracking or breaking, making them ideal for applications where thermal insulation and durability are required.

Q:Can insulating fire bricks be used in wastewater treatment plants?: Yes, insulating fire bricks can be used in wastewater treatment plants. They are often used in the construction of furnaces, kilns, and other high-temperature applications in these plants to provide thermal insulation and retain heat efficiently.

Q:Are insulating fire bricks suitable for use in glass furnaces?: Yes, insulating fire bricks are indeed suitable for use in glass furnaces. These fire bricks are specifically designed to withstand high temperatures and provide excellent thermal insulation. They help to maintain consistent heat levels within the furnace, prevent heat loss, and reduce energy consumption. Additionally, insulating fire bricks are resistant to chemical reactions and can withstand the corrosive environment of a glass furnace.

Q:Can insulating fire bricks be used in the construction of lime production kilns?: Yes, insulating fire bricks can be used in the construction of lime production kilns. Lime production kilns require high temperatures to convert limestone into lime, and insulating fire bricks are known for their ability to withstand and retain high temperatures. These bricks have high insulating properties, allowing the kiln to reach the desired temperature quickly and efficiently, while also minimizing heat loss during the production process. Insulating fire bricks are also lightweight and easy to handle, making them suitable for use in the construction of lime production kilns. Additionally, these bricks have good thermal shock resistance, meaning they can withstand rapid temperature changes without cracking or breaking, which is crucial in the kiln environment. Overall, the use of insulating fire bricks in the construction of lime production kilns can help optimize the efficiency and effectiveness of the lime production process.

Q:How do insulating fire bricks help improve the efficiency of combustion processes?: Insulating fire bricks help improve the efficiency of combustion processes by providing excellent thermal insulation, which minimizes heat loss and enhances heat transfer to the desired areas. This insulation prevents excessive heat from escaping to the surroundings, allowing for higher temperatures within the combustion chamber. As a result, the combustion process becomes more efficient, leading to better fuel combustion, reduced fuel consumption, and increased energy savings.

Q:Are insulating fire bricks suitable for applications requiring low thermal conductivity?: Yes, insulating fire bricks are suitable for applications requiring low thermal conductivity. Insulating fire bricks are specifically designed to have low thermal conductivity, making them ideal for situations where heat insulation is necessary. These bricks are made from lightweight and porous materials, such as clay and other refractory materials, which provide excellent insulation properties. The porous structure of insulating fire bricks traps air within the material, reducing heat transfer and resulting in low thermal conductivity. This makes them effective in applications such as kilns, furnaces, and other high-temperature environments where minimizing heat loss is crucial. Overall, insulating fire bricks are a reliable choice for applications that demand low thermal conductivity.

Q:Can insulating fire bricks be used in the construction of kilns?: Insulating fire bricks have the ability to be utilized in the construction of kilns. With a focus on possessing a high insulating value, these bricks can endure high temperatures while minimizing heat loss. This attribute renders them well-suited for the task of kiln construction as they effectively preserve and regulate the desired temperature within the kiln. Furthermore, these bricks are lightweight and easily manageable, adding to their convenience in kiln construction. An additional advantage lies in their resistance to thermal shock, an imperative characteristic for kilns that experience swift temperature fluctuations. In general, insulating fire bricks are a favored option for kiln construction due to their insulating properties, durability, and user-friendliness.

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