Publish Time: 2026-06-21 Origin: 由AI辅助生成
In the field of industrial high-temperature equipment and building fire insulation, choosing an insulation material that can withstand extreme high temperatures and effectively block heat conduction is a common problem faced by many equipment supervisors and engineering technicians. Traditional rock wool is susceptible to moisture and fails, and ordinary insulation wool is not strong enough. However, aluminum foil aluminum silicate insulation wool, with its unique composite structure, is becoming a solution for high-temperature pipes, kiln backings, air duct fireproof packages and other scenarios. As a professional domestic supplier of thermal insulation materials, Shengyuan Refractories has been committed to providing customers with efficient and reliable thermal insulation solutions. Today we will introduce to you in detail the core uses and advantages of aluminum foil aluminum silicate insulation cotton.
1. What is aluminum foil aluminum silicate insulation cotton?
Aluminum foil aluminum silicate insulation cotton is a composite insulation material formed by compounding a layer of dense metal aluminum foil on the surface of an aluminum silicate needle punched blanket (commonly known as a ceramic fiber blanket) through a special adhesive or sewing process. Its core base material, aluminum silicate needle-punched blanket, is a flexible refractory fiber product made from high-quality aluminum silicate as raw material, which is melted in a resistance furnace, blown into fibers, and acupuncture shaped.
According to the national standard "Aluminum silicate wool and its products for thermal insulation" (GB/T 16400-2023), aluminum silicate wool and its products are divided into different models according to the use temperature: the ordinary type has a use temperature of 1000°C, the standard type 1200°C, and the high-purity type can reach 1250°C. The composite aluminum foil layer on the surface plays multiple roles of reflecting radiant heat, preventing moisture, and increasing strength, greatly improving the overall performance of the product.
Purpose 1: Insulation of high-temperature industrial pipelines and equipment
In industries such as petrochemical, electric power, and metallurgy, thermal insulation of high-temperature steam pipes, hot air pipes, and heating furnace auxiliary pipelines is an urgent need. The thermal conductivity of aluminum foil aluminum silicate insulation cotton is low, which can be as low as 0.044 W/(m·K) at normal temperature. The thermal conductivity is only about 0.16-0.18 W/(m·K) at an average temperature of 500°C, which can effectively reduce heat loss and energy consumption. The presence of the aluminum foil layer can also reflect radiant heat, further enhancing the thermal insulation effect. Commonly used in scenarios such as steam pipe insulation in thermal power plants and thermal insulation wrapping of heating furnace pipelines in refineries.
Use 2: Industrial kiln backing and wall lining insulation
In heat treatment furnaces, ceramic kilns, and petrochemical heating devices, aluminum foil aluminum silicate insulation cotton is often used as a backing insulation layer and is installed behind heavy refractory bricks or castables to provide supplementary insulation. Its fiber structure can maintain good tensile strength and toughness under long-term use in neutral and oxidizing atmospheres, and is not easily pulverized. For intermittent kilns that need to be started and stopped frequently, its low heat capacity can also make the heating time faster and save fuel costs.
Purpose 3: Fire protection package for building smoke and exhaust ducts
This is one of the fastest growing application scenarios in recent years. According to building fire protection regulations, the smoke prevention and exhaust ducts of high-rise buildings need to reach a certain fire resistance limit (such as 0.5 hours, 1 hour, 2 hours). Aluminum foil aluminum silicate insulation cotton has become an ideal material for fire-resistant wrapping of air ducts because of its characteristics of being non-combustible in open flames and resistant to temperatures up to 1100°C. The composite aluminum foil layer on the surface provides additional working strength, while preventing moisture and dust from falling off, making construction more convenient. Among common specifications, 30mm thickness corresponds to a 1-hour fire resistance limit, and 40mm and 60mm thickness corresponds to a 2-hour fire resistance limit.
Use 4: New energy and power equipment thermal insulation
With the rapid development of the new energy industry, the generators and gearboxes in the wind turbine cabin need sound insulation and heat insulation protection. The photovoltaic inverter and the heat collector and heat exchanger of the photothermal power generation system need high-temperature heat insulation. The battery cabin of the electrochemical energy storage power station also needs fire protection and heat insulation protection. Aluminum foil aluminum silicate insulation cotton has been increasingly widely used in these emerging fields due to its comprehensive properties of high temperature resistance, non-combustibility, heat insulation and sound absorption.
Use 5: Fire protection and heat insulation for ships and transportation
Aluminum foil aluminum silicate insulation cotton is also suitable for use in scenes that require fire protection and heat insulation, such as ship bulkheads, car exhaust pipes, and engine compartments. Its soft texture and easy cutting make it easy to adapt to small spaces and complex pipeline layouts, ensuring the fire safety of all types of transportation vehicles.
Advantage 1: Excellent thermal insulation performance
The surface of the aluminum foil effectively reflects radiant heat, and combined with the extremely low thermal conductivity of the fiber blanket itself, the thermal insulation effect is far superior to ordinary insulation cotton. Under high temperature conditions, this "reflection + barrier" double insulation mechanism can greatly reduce heat transfer and significantly reduce the temperature of the outer wall of the equipment.
Advantage two: high temperature resistance, non-burning
The temperature resistance level of the base material aluminum silicate fiber blanket can reach 1000°C to 1250°C depending on the model, and the combustion performance level is Class A (non-combustible material). In case of fire or abnormal high temperature, the material will not burn or produce toxic smoke, making it extremely safe and reliable.
Advantage three:
Very good chemical stability
Aluminum silicate fibers can maintain stable fiber structure and mechanical strength even under neutral and oxidizing atmospheres for a long time, resist corrosion, not age, and do not produce harmful substances. Even in high temperature, high humidity or chemical atmosphere environments, its thermal insulation performance is still very stable.
Advantage 4: Sound absorption and noise reduction
The porous structure of aluminum silicate fiber has good sound absorption properties and can effectively absorb the noise generated by industrial equipment during operation. It can achieve noise reduction and improve the working environment while insulating pipelines and equipment. It is especially suitable for use around high-noise equipment such as fans and compressors.
Advantage 5: Convenient construction and reduced dust
The aluminum foil layer wraps the fiber surface, effectively avoiding the problems of fiber dust falling off and skin itching during the cutting and installation process of traditional insulation cotton. The product is easy to cut and bend, has high installation efficiency, and reduces the occupational health risks of construction workers.
Advantage 6: Moisture-proof and tear-resistant
The aluminum foil layer provides additional physical strength, making the composite material less susceptible to tearing and breakage. At the same time, the aluminum foil isolates water vapor and prevents the thermal conductivity of the insulation material from increasing or structural collapse due to moisture. It not only extends the service life, but is also suitable for humid environments or outdoor pipes.
Selection based on operating temperature: Ordinary type is suitable for working conditions below 1000℃ and is an economical choice; standard type is suitable for working conditions below 1200℃ and is the main model in most industrial high-temperature scenarios; high-purity type is suitable for special high-temperature requirements below 1250℃, with higher purity and better performance.
Choose according to the composite process: Adhesive aluminum foil has a smooth and beautiful surface and is suitable for indoor visible parts that require a good look and feel; sewn aluminum foil is more durable and suitable for outdoor use, high wind pressure or scenes that need to withstand certain mechanical stress.
Choose according to thickness and density: Common thickness is 10-80mm, and density is 96-128kg/m³. When used for fireproof wrapping of air ducts, the corresponding thickness needs to be selected according to the fire resistance limit required by the design - 30mm corresponds to the 1 hour fire resistance limit, 40mm and 60mm correspond to the 2 hour fire resistance limit. When used for pipe insulation, the thickness is determined comprehensively based on the pipe diameter and design temperature drop requirements.
Choose according to the number of aluminum foil composite surfaces: Single-sided aluminum foil is suitable for conventional pipe insulation and air duct wrapping, which is economical and affordable; double-sided aluminum foil provides comprehensive moisture-proof protection and surface strength, and is suitable for outdoor, high-humidity or scenes that require extremely high fire resistance of materials.
Aluminum foil aluminum silicate insulation cotton combines the high temperature resistance, low thermal conductivity, and sound absorption properties of aluminum silicate fiber with the heat reflection, moisture resistance, and toughening functions of the aluminum foil layer. It is a cost-effective solution in the fields of industrial high-temperature insulation and building fire insulation. Whether it is petrochemical pipeline insulation, industrial kiln backing insulation, building smoke and exhaust duct fireproof wrapping, or new energy equipment insulation protection, it can come in handy.
If you are now looking for an insulation material for high-temperature equipment that is high-temperature resistant, has good insulation, is fast to construct, and has a long service life, please follow our service account and we will answer your questions.