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Product
Aluminum silicate fireproof needle punched blanket
- Product details
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Aluminum silicate insulation material is a high-performance fire-resistant insulation material made mainly from high-quality gemstones, melted in a high-temperature electric furnace above 2000 ℃, blown by centrifugal spraying or spinning into fibers, and cured into shape by adding special binders. Its fibers interweave to form a microporous structure, with a high proportion of static air inside. Therefore, it has the characteristics of light weight, high temperature resistance, low thermal conductivity, good thermal stability, and excellent thermal shock resistance. Our products come in various forms, including aluminum silicate plates, aluminum silicate felt/blankets, aluminum silicate tube shells, aluminum silicate shaped parts, etc. They are widely used in insulation and fire barriers for power boilers, industrial kilns, petrochemical high-temperature equipment, ship fire prevention, building fire doors and other fields.
Low thermal conductivity and energy-saving effect: The thermal conductivity can be as low as 0.034 W/(m · K) at room temperature, and can still be controlled within 0.18 W/(m · K) under hot surface conditions at 600 ℃. Compared to traditional refractory bricks or rock wool, it can reduce heat loss by 20% to 35% at the same thickness, significantly improving the thermal efficiency of kilns and pipelines.
Thermal stability and thermal shock resistance: The fiber structure enables it to withstand rapid temperature rise and fall without cracking or peeling. In industrial kilns with long-term operation or intermittent production, the service life is significantly better than that of hard refractory materials.
Mechanical strength and flexibility: The needle punched blanket can have a strength of 10-35 kPa and also has a certain degree of flexibility, making it easy to wrap irregular equipment such as valves, elbows, and burner ports; Aluminum silicate plate has a stable morphology and is suitable for areas that are subject to air flow erosion or require high strength.
Chemical stability and corrosion control: Conventional models are resistant to acid and alkali (excluding hydrofluoric acid and concentrated phosphoric acid). When in contact with austenitic stainless steel, "low corrosion" products can be selected to avoid the risk of stress corrosion cracking by controlling the soluble ion content (such as Cl ⁻, F ⁻, S ² ⁻).
Cover up.
-Surface treatment suggestion: For areas that require airflow erosion or vibration, high-temperature plastering materials or stainless steel mesh can be applied outside the insulation layer to extend its service life.
Comparison of Applicable Scenarios for Different Forms:
Product Form Applicable Scenarios Density Range (kg/m ³ Typical Temperature)
Aluminum silicate plate industrial furnace wall lining, furnace door lining, fireproof door core material 80-600 ≤ 1260 ℃
Aluminum silicate felt/blanket boiler body, pipeline wrapping, welding heat treatment insulation 60-160 ≤ 1350 ℃
Aluminum silicate tube shell thermal pipeline network, petrochemical steam pipeline 100-180 ≤ 1000 ℃
Customized valves, flanges, burner ports, and peepholes with irregular shapes according to drawings ≤ 1350 ℃
Industry application refinement:
Power industry * thermal power, nuclear power, waste to energy generation): Boiler burner area, high-temperature flue, turbine body insulation, commonly used high aluminum or zirconium type blanket, used in conjunction with metal casing.
Petrochemical industry (cracking furnace, conversion furnace, heating furnace): The equipment lining is made of full fiber structure or backed with insulation layer, which requires high chemical purity and high temperature shrinkage rate of fibers. It is recommended to use high-purity or zirconium containing blankets.
Kiln manufacturing and maintenance: It can be used for new furnace construction, hot repair, and furnace door sealing. It is recommended to lay it in layers with staggered joints, and the overlap at the joints should be ≥ 100mm.
Building fire protection: As a filling core material for fire doors, firewalls, and fire shutters, the density is usually ≥ 100kg/m ³ and must meet the GB 8624 A1 level combustion performance requirements.
Quality standards and certification references:
Execution standard: GB/T 16400-2023 "Aluminum silicate wool and its products for thermal insulation"
Optional testing items: thermal conductivity, slag ball content, linear shrinkage rate, tensile strength, combustion grade, corrosive ion content
Can provide third-party type inspection reports and factory self inspection reports
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common problem
Q
What are the main types of building insulation materials? What are the advantages and disadvantages of each?
A
Advantages: Good fire resistance (Class A non combustible), good breathability, and high stability.
Disadvantages: Slightly higher thermal conductivity than organic materials, higher water absorption rate, and easy generation of fiber dust during construction.
Organic insulation materials (such as EPS polystyrene board, XPS extruded board, PU polyurethane):
Advantages: low thermal conductivity, good insulation effect, light weight, and convenient construction.
Disadvantages: The fire rating is mostly B level (requiring the addition of flame retardants), it is prone to deformation at high temperatures, and its durability is slightly poor.
Composite insulation materials (such as integrated insulation board, vacuum insulation board):
Advantages: Excellent comprehensive performance, high construction efficiency, and some can achieve Class A fire protection.
Disadvantages: High cost and strict requirements for the flatness of the base layer.
Q
How to choose insulation materials suitable for the project?
A
Fire prevention requirements: Grade A materials are required for high-rise buildings (>100m); Low level B1 (flame retardant) is available.
Climate conditions: In extremely cold regions, materials with low thermal conductivity (such as PU, XPS) are preferred; Low water absorption is required in humid environment (such as XPS, foam glass).
Base type: Concrete walls often use boards; Complex shapes can be coated with polyurethane or insulated mortar.
Economy: EPS has the lowest cost; Vacuum insulation board is expensive but thin.
Policy and regulations: B2 level materials are prohibited in some areas, and local standards need to be consulted.
