High Alumina Insulating Fire Brick System 1

High Alumina Insulating Fire Brick

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Specifications

Fire brick
1.ISO 9001 approved,
2.With high quality and competitive price,
3.Standard and special shape.

Fire-clay refractory brick.
1. N-1
AL2O3 (%)>42
Refractoriness >1750
Refractoriness under load KD>1400
Permanent linear change onreheating
1500*2h
1450*2h
1400*2h:+0.1; -0.4
Apparent Porosity(%)<22
Cold crushing strength (Mpa)>29.4

2. N-2a
AL2O3 (%)>40
Refractoriness >1730
Refractoriness under load KD>1350
Permanent linear change onreheating
1500*2h
1450*2h
1400*2h:+0.1; -0.5
Apparent Porosity(%)<24
Cold crushing strength (Mpa)>24.5

High-alumina refractory brick
1. LZ-75
AL2O3 (%)>75
Refractoriness>1790
Refractoriness under load KD>1520
Permanent linear change onreheating
1500*2h:+0.1; -0.4
1450*2h
1400*2h
Apparent Porosity(%)<23
Cold crushing strength (Mpa)>53.9

2. LZ-65
AL2O3 (%)>65
Refractoriness >1790
Refractoriness under load KD>1500
Permanent linear change onreheating
1500*2h:+0.1; -0.4
1450*2h
1400*2h
Apparent Porosity(%)<23
Cold crushing strength (Mpa)>49

3.LZ-55
AL2O3 (%)>55
Refractoriness >1770
Refractoriness under load KD>1470
Permanent linear change onreheating
1500*2h:+0.1; -0.4
1450*2h
1400*2h
Apparent Porosity(%)<22
Cold crushing strength (Mpa)>44.1

4.LZ-48
AL2O3 (%)>48
Refractoriness >1750
Refractoriness under load KD>1420
Permanent linear change onreheating
1500*2h
1450*2h:+0.1; -0.4
1400*2h
Apparent Porosity(%)<22
Cold crushing strength (Mpa)>39.2

Fire clay brick SK-32
Item	Standard
AI2O3(%)	30
Fe2O3 (%)	3.5
Refractoriness (SK)	32
Refractoriness under load, 0.2MPa, Ta, (°C)	1300
Porosity (%)	22-26
Bulk density (g/cm³)	2.05
Cold crushing strength (MPa)	25
Thermal expansion at 1000°C (%)	0.6

Fire clay brick SK-34
Item	Standard
AI2O3(%)	38
Fe2O3 (%)	2.5
Refractoriness (SK)	34
Refractoriness under load, 0.2MPa, Ta, (°C)	1350
Porosity (%)	19-23
Bulk density (g/cm³)	2.10-2.15
Cold crushing strength (MPa)	25
Thermal expansion at 1000°C (%)	0.6

Fire clay brick SK-36
Item	Standard
AI2O3(%)	50
Fe2O3 (%)	2
Refractoriness (SK)	36
Refractoriness under load, 0.2MPa, Ta, (°C)	1450
Porosity (%)	20-24
Bulk density (g/cm³)	2.30-2.40
Cold crushing strength (MPa)	45
Thermal expansion at 1000°C (%)	0.3

$High alumina refractories brick$

Q:Can insulating fire bricks be used in the construction of foundry molds?: Insulating fire bricks are capable of being utilized in the construction of foundry molds. These bricks are produced using lightweight materials like clay, alumina, and silica, and are specifically designed to possess low thermal conductivity. This quality renders them ideal for various applications that necessitate resistance against high temperatures and insulation, particularly foundry molds. Foundry molds are employed to shape and retain molten metal during the casting procedure. Given that molten metal is generally poured at exceedingly high temperatures, it becomes imperative to employ materials that can endure the heat without melting or distorting. Insulating fire bricks possess a high melting point and exceptional thermal stability, making them appropriate for usage in foundry molds. Furthermore, apart from their resistance to high temperatures, insulating fire bricks also offer commendable insulation properties. This proves to be crucial in foundry molds as it assists in regulating the cooling rate of the molten metal, thereby preventing thermal shock and ensuring proper solidification. The insulation properties of insulating fire bricks also contribute to lowering energy consumption and enhancing the overall efficiency of the foundry process. All in all, insulating fire bricks are an enduring and efficient choice for the construction of foundry molds. They provide resistance against high temperatures, excellent thermal stability, and reliable insulation properties, thus establishing themselves as a dependable option for employment in the demanding conditions of foundry operations.

Q:Are insulating fire bricks suitable for use in thermal shock applications?: Yes, insulating fire bricks are suitable for use in thermal shock applications. Insulating fire bricks are designed to withstand rapid temperature changes without cracking or breaking. They have low thermal conductivity and high thermal resistance, which makes them an ideal choice for applications where thermal shock is a concern. These bricks are made from lightweight refractory materials, often containing a high percentage of alumina or silica, which gives them excellent thermal stability and resistance to thermal shock. They can be used in various high-temperature applications such as kilns, furnaces, and fireplaces, where they are exposed to extreme temperature fluctuations. Overall, insulating fire bricks are well-suited for thermal shock applications due to their ability to withstand rapid temperature changes and maintain their structural integrity.

Q:Can insulating fire bricks be used in high-temperature insulation applications?: Yes, insulating fire bricks can be used in high-temperature insulation applications. Insulating fire bricks are designed to withstand and retain heat at elevated temperatures. They have low thermal conductivity and high insulation properties, making them ideal for use in applications where high temperatures need to be contained and insulated. These bricks are commonly used in industries such as steel, glass, and ceramics, as well as in furnaces, kilns, and other high-temperature equipment. Insulating fire bricks provide a reliable and efficient solution for insulation in high-temperature environments, helping to maintain heat and reduce energy loss.

Q:Can insulating fire bricks be used in the construction of furnaces?: Yes, insulating fire bricks can be used in the construction of furnaces. These bricks are specifically designed to withstand high temperatures and provide excellent insulation, making them ideal for lining the walls of furnaces. They help to reduce heat loss, increase energy efficiency, and improve overall performance of the furnace.

Q:Are insulating fire bricks suitable for insulation in power boilers?: Insulating fire bricks can be suitable for insulation in power boilers depending on the specific requirements and conditions of the boiler. Insulating fire bricks are known for their high temperature resistance and low thermal conductivity, which makes them effective in reducing heat loss and improving energy efficiency in various applications. However, when considering their use in power boilers, several factors need to be taken into account. Firstly, the operating temperature and pressure of the boiler should be considered to ensure that the insulating fire bricks can withstand these conditions without any degradation or failure. Power boilers typically operate at high temperatures and pressures, so it is important to choose insulating fire bricks that have a high temperature rating and can withstand the required pressure. Additionally, the composition and structure of the insulating fire bricks should be considered. Some power boilers may contain corrosive or abrasive substances, which can potentially damage the insulating fire bricks over time. Therefore, it is important to select insulating fire bricks that are resistant to corrosion and abrasion, or to consider additional protective measures such as coatings or linings. Furthermore, the thermal conductivity of the insulating fire bricks should be evaluated. While insulating fire bricks have low thermal conductivity compared to other refractory materials, it is important to ensure that they provide sufficient insulation for the specific requirements of the power boiler. This may involve calculating heat transfer rates and determining the appropriate thickness and density of the insulating fire bricks to achieve the desired insulation performance. Ultimately, the suitability of insulating fire bricks for insulation in power boilers depends on careful consideration of factors such as temperature, pressure, composition, structure, and thermal conductivity. Engaging with experts and conducting proper evaluations and calculations will help determine if insulating fire bricks are a suitable choice for insulation in a particular power boiler application.

Q:Can insulating fire bricks be used for insulation in walls or roofs?: Insulating fire bricks are primarily designed for use in high-temperature applications, such as furnaces, kilns, and fireplaces. While they offer excellent thermal insulation properties, they may not be the best choice for insulation in walls or roofs of residential or commercial buildings. Insulating fire bricks are often made from lightweight refractory materials, such as ceramic fibers or expanded clay. These materials are highly resistant to heat, but they may not provide sufficient insulation against cold temperatures or moisture. Additionally, their structural integrity may not be suitable for load-bearing applications or other requirements specific to walls or roofs. For insulation in walls or roofs, it is generally recommended to use materials specifically designed for building insulation purposes, such as fiberglass batts, spray foam insulation, or rigid foam boards. These materials are better suited to provide both thermal and moisture resistance, as well as meet the necessary structural requirements. In summary, while insulating fire bricks may offer excellent thermal insulation properties, they are not typically recommended for use in walls or roofs. It is advisable to consult with a building professional or insulation specialist to determine the most suitable insulation materials for your specific needs.

Q:How do insulating fire bricks handle moisture?: Insulating fire bricks are designed to handle moisture quite effectively. They have low porosity and are made of materials that are resistant to water absorption. This allows them to retain their structural integrity even when exposed to moisture or high humidity levels. Additionally, their insulating properties are not significantly affected by moisture, making them suitable for various applications where moisture resistance is required.

Q:What types of insulating fire bricks are available?: There are several types of insulating fire bricks available in the market, each designed to cater to specific needs and temperature requirements. Some common types include: 1. Lightweight Insulating Fire Bricks (IFB): These bricks are made from lightweight materials such as vermiculite, perlite, or diatomaceous earth. They have excellent insulating properties, making them ideal for applications where heat retention is crucial. 2. Mullite Insulating Fire Bricks: These bricks are composed primarily of mullite, a mineral known for its high temperature resistance and low thermal conductivity. They are often used in high-temperature applications, such as furnaces and kilns. 3. Bubble Alumina Insulating Fire Bricks: These bricks are made from high-purity alumina and contain small, evenly distributed bubbles. The bubbles act as insulating agents, reducing the bricks' weight and thermal conductivity. They are commonly used in applications that require thermal shock resistance. 4. Calcium Silicate Insulating Fire Bricks: These bricks are made from a combination of crushed silica and lime. They have excellent strength, low thermal conductivity, and can withstand high temperatures. They are commonly used in industrial furnaces and boilers. 5. Ceramic Fiber Insulating Fire Bricks: These bricks are made from ceramic fibers, which are lightweight and have excellent insulating properties. They are often used in applications where high temperatures and rapid heating and cooling cycles are involved. 6. Zirconia Insulating Fire Bricks: These bricks are made from zirconia, a ceramic material known for its high thermal insulation properties and resistance to chemical corrosion. They are commonly used in applications that require high-temperature resistance and excellent thermal insulation. It's important to choose the right type of insulating fire brick based on the specific requirements of your application. Factors such as temperature, thermal conductivity, and chemical resistance should be considered when selecting the appropriate brick for your project.

Q:Do insulating fire bricks have a high resistance to creep?: Yes, insulating fire bricks generally have a high resistance to creep. The low thermal conductivity and high refractoriness of these bricks allow them to withstand high temperatures without significant deformation or creep.

Q:What is the bulk density of the sintered bricks?: The Dragon such high aluminum refractory brick density is generally around 1000, heavy refractory brick, high alumina brick HLGX heavy weight in general 2000Kg/m fand.

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