Carborundum Refractory Fire Brick

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Specifications

1.Passed ISO 9001;
2.57% Alumina content,or as customized;
3. Carborundum Fire Brick is widely used in iron-making.

AL₂O₃SiCC carborundum fire brick are universal materials for the lining of molten pretreatment equipments of molten iron tank, torpedo car, etc. The products are shaped by machine power by using dense bauxite clinkerand brown fused alumina as base materials and adding high quality SiC fines and high purity glake fraphite. It has the advantages of excellent slag resistance, thermal shock resistance, good resistance to mechanical erosion, abrasion resistance, etc.

Carborundum products belong to high grade refractory material,maximal use temperature is 1500°C,it has excellent thermal conductivity,heat shock stability,high load softening point and very good wear-resisting property,widely used in various industries with special requirement.

Item		Si3N4 bonded SiC brick	Sialon bonded SiC brick	Sialon bonded corundum brick
SiC, % ≥		72	70	80 (Al2O3)
Si3N4, % ≥		20	5 (N)	5 (N)
Fe2O3, % ≤		0.7	0.7	0.7
Bulk density g/cm3, ≥		2.65	2.65	3.1
Apparent porosity %,≤		16	16	16
CCS MPa, ≥		150	150	120
MOR Mpa	Room temp. ≥	42	42	12
MOR Mpa	1400°C×0.5hrs ≥	45	42	20
Refractoriness under load °C ≥ (0.2MPa, 0.6%)		1700	1700	1700
Thermal shock resistance, cycles (Water quenching at 1100°C)≥		30	30	30

Q:How do insulating fire bricks affect the overall carbon footprint of a structure?: Insulating fire bricks can significantly reduce the carbon footprint of a structure. These bricks have higher thermal insulation properties compared to traditional bricks, which means they can better retain heat and reduce the need for excessive heating or cooling. By improving energy efficiency and reducing the consumption of fossil fuels, insulating fire bricks help to lower the carbon emissions associated with the structure's operation. Additionally, their longer lifespan and recyclability contribute to further environmental benefits by reducing waste generation and the need for frequent replacements, ultimately minimizing the overall carbon footprint of the structure.

Q:What is the typical porosity of an insulating fire brick?: The typical porosity of an insulating fire brick is around 40% to 60%.

Q:Do insulating fire bricks provide sound insulation as well?: No, insulating fire bricks primarily provide thermal insulation, not sound insulation. Insulating fire bricks are designed to withstand high temperatures and are commonly used in applications such as kilns, furnaces, and fireplaces to prevent heat loss. While they may offer some degree of sound absorption due to their dense composition, they are not specifically designed or effective in reducing sound transmission. If sound insulation is the primary concern, other materials such as acoustic insulation panels or soundproofing materials would be more suitable.

Q:How do insulating fire bricks affect the overall fire safety of a structure?: The overall fire safety of a structure is greatly improved by the use of insulating fire bricks. These bricks are specifically designed to withstand high temperatures and provide excellent insulation, making them ideal for applications that require heat containment. By effectively insulating the structure, these bricks help minimize the spread of fire and heat transfer. Their low thermal conductivity slows down the rate at which heat is conducted through the walls, ceiling, and floors of a building. This is crucial in preventing the fire from spreading to adjacent areas or neighboring structures. In addition, insulating fire bricks act as a barrier to the penetration of flames and hot gases, further contributing to the fire safety of a structure. Their ability to withstand high temperatures without compromising their structural integrity effectively contains the fire within a confined area. This containment provides valuable time for evacuation or firefighting efforts. Furthermore, insulating fire bricks are known for their excellent fire resistance properties. They are manufactured using refractory materials that can withstand extremely high temperatures without melting or disintegrating. This resistance to heat ensures that the bricks maintain their structural integrity even under intense fire conditions, providing a reliable fire protection barrier. Apart from their fire resistance properties, insulating fire bricks also possess excellent insulation capabilities. They have low thermal conductivity, meaning they are highly effective in preventing heat transfer. By reducing the rate of heat transfer, these bricks help maintain a cooler temperature on the non-fire side. This is particularly beneficial for structures that require temperature control, such as industrial furnaces or kilns. In summary, insulating fire bricks significantly enhance the fire safety of a structure by minimizing the spread of fire, acting as a barrier to flames and hot gases, and withstanding high temperatures without compromising their integrity. Their insulation properties also contribute to maintaining a cooler environment on the non-fire side. Therefore, incorporating insulating fire bricks into the construction of a building greatly improves its ability to withstand and contain fires, ultimately ensuring the safety of occupants and reducing property damage.

Q:Can insulating fire bricks be used in the construction of hot blast stoves?: Indeed, it is possible to utilize insulating fire bricks in the fabrication of hot blast stoves. These bricks are specifically engineered to possess a low thermal conductivity, rendering them highly efficient in diminishing heat dissipation. In order to ensure optimal functionality, hot blast stoves necessitate the maintenance of elevated temperatures, a goal that can be accomplished through the utilization of insulating fire bricks, which effectively restrict heat transfer to the stove's external surface. Furthermore, these bricks exhibit commendable insulation properties, enabling energy conservation and enhancing the overall efficiency of the stove. Moreover, it is worth noting that insulating fire bricks are resistant to thermal shock, a crucial attribute in hot blast stove applications where frequent temperature fluctuations are common.

Q:Do insulating fire bricks have a high fireproof rating?: Indeed, insulating fire bricks possess a remarkable fireproof rating. These bricks have been specifically engineered to endure exceedingly high temperatures and offer exceptional insulation against the transfer of heat. They are crafted using specialized refractory materials with limited thermal conductivity, thereby aiding in the retention of heat and preventing its escape from the system. Insulating fire bricks are capable of withstanding temperatures ranging from 2300°F to 3100°F (1260°C to 1700°C), rendering them ideal for utilization in furnaces, kilns, fireplaces, and other applications involving elevated temperatures. Their elevated fireproof rating guarantees their ability to effectively safeguard structures and equipment from the intense heat and flames, enabling secure and efficient operations across diverse industries.

Q:Are insulating fire bricks resistant to acid attack?: Yes, insulating fire bricks are resistant to acid attack.

Q:Can insulating fire bricks be used in the construction of smelter crucibles?: Yes, insulating fire bricks can be used in the construction of smelter crucibles. Insulating fire bricks are made from materials that can withstand high temperatures, making them suitable for use in smelting operations. These bricks have low thermal conductivity, which helps to retain heat and prevent excessive heat loss from the smelter crucible. This makes them ideal for creating a well-insulated and efficient crucible that can withstand the intense heat and thermal shock associated with smelting processes. Additionally, insulating fire bricks are lightweight and easy to shape, allowing for convenient construction and customization of the crucible design. Overall, using insulating fire bricks in the construction of smelter crucibles can help to improve the thermal efficiency and durability of the crucible, leading to more efficient and effective smelting operations.

Q:Can insulating fire bricks be used for insulation in refractory lining repair?: Yes, insulating fire bricks can be used for insulation in refractory lining repair. Insulating fire bricks are specifically designed to provide insulation in high-temperature environments, making them suitable for repairing refractory linings that require thermal insulation.

Q:Are insulating fire bricks resistant to alkali-silica reaction?: Insulating fire bricks (IFBs) are not inherently resistant to alkali-silica reaction (ASR). ASR is a chemical reaction that occurs between the alkalis from cement and reactive forms of silica present in aggregates, which can lead to the formation of a gel that expands and causes cracking in concrete structures. While IFBs are generally made from refractory materials that are designed to withstand high temperatures and thermal shock, they do not have specific properties to resist ASR. The resistance to ASR depends on the composition and characteristics of the specific refractory material used in the IFB. If the refractory material used in the IFB contains reactive forms of silica, such as quartz or cristobalite, and there is exposure to alkalis, there is a possibility of ASR occurring. However, if the refractory material is low in reactive silica content or contains additives that can mitigate ASR, the risk of ASR may be minimized. It is important to note that the primary purpose of IFBs is to provide insulation in high-temperature applications, such as kilns, furnaces, and fireplaces. If ASR resistance is a critical requirement for a specific application, it is recommended to consult with the manufacturer or a materials engineer to determine the suitability of the IFB for that particular scenario.

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