In high-temperature industries, ceramic fibre blankets provide essential insulation, fire protection, and noise reduction for vital equipment. As a global partner to high-temperature industries, CVSIC is committed to supplying high-quality ceramic fibre blankets and comprehensive heating solutions. This guide provides a comprehensive overview of ceramic fibre blankets, including definitions, selection criteria, and usage practices, to help factory managers, engineers, and those interested in high-temperature materials address operational challenges effectively.
What are ceramic fibre blankets?
Ceramic fibre blankets are lightweight, fire-resistant insulation materials made from fibrous materials such as hard clay, fused quartz, alumina, and silica. They are produced through high-temperature melting, blowing, or spinning processes. This creates a soft, ‘fireproof blanket’ capable of withstanding extremely high temperatures. Their primary components include alumina (Al₂O₃) and silica (SiO₂). Some high-performance products contain zirconia (ZrO₂). Based on temperature resistance and performance, ceramic fibre blankets can be categorised into the following types:
- Normal Type: Temperature resistance of approximately 1100°C
- Standard Type: Temperature resistance of approximately 1260°C
- High-Purity Type: Temperature resistance of approximately 1260°C with higher purity
- High-Alumina Type: Temperature resistance of approximately 1360°C
- Zirconia-Containing Type: Temperature resistance of approximately 1430°C
- 93% alumina: high-temperature resistance of approximately 1500°C
- 99% alumina: high-temperature resistance of approximately 1600°C
As a manufacturer of ceramic fibres, CVSIC uses advanced production processes. This ensures uniform fibre distribution and consistent dimensions. Each roll meets industry-leading standards.
Note: The production process typically includes raw material melting, fibreisation, needling, thermal setting, cutting, and rolling. These steps ensure product dimensional accuracy and a smooth surface.
Comparison Table:
| Model | Max Operating Temperature (°C) | Density (kg/m³) | Thermal Conductivity (W/m·K, 600/800/1000°C) | Linear Shrinkage (%) | Chemical Composition (Al₂O₃/ZrO₂/Cr₂O₃) | Applicable Scenarios |
|---|---|---|---|---|---|---|
| CV1050 | 1050 | 64-160 | 0.20/0.29/- | ≤4.0 (950°C) | 38-40%/-/- | Small boilers, household fireplaces |
| CV1260 | 1260 | 64-160 | 0.15/0.22/0.30 | ≤4.0 (1100°C) | 44-47%/-/- | Steel furnaces, petrochemical preheating |
| CV1350 | 1350 | 64-160 | -/0.21/0.31 | ≤4.0 (1200°C) | 52-55%/-/- | Power boilers, ceramic kilns |
| CV1400 | 1400 | 64-160 | -/0.21/0.31 | ≤4.0 (1250°C) | 38-40%/5-7%/- | Cement rotary kilns, petrochemical cracking furnaces |
| CV1430 | 1430 | 64-160 | -/0.21/0.31 | ≤4.0 (1350°C) | 35-38%/15-17%/- | Aerospace, ultra-high-temperature experimental furnaces |
| CV1500 | 1500 | 64-160 | -/0.19/0.28 | ≤4.0 (1400°C) | 36-38%/-/3-5% | High-temperature laboratory furnaces, aerospace components |
| CV1600 | 1600 | 130-170 | -/0.19/0.28 | ≤1.0 (1500°C) | 70-73%/-/- | New energy equipment, ultra-high-temperature smelting furnaces |
Features of ceramic fibre blankets
Ceramic fibre Insulation blankets are highly sought after due to their unique physical and chemical properties. The main features are: High-temperature resistance. They can withstand temperatures up to 1600°C, making them suitable for extreme high-temperature environments.
- Low thermal conductivity: Thermal conductivity is only 0.09 at 400°C and approximately 0.22 at 1000°C, providing excellent insulation performance.
- Sound absorption and insulation: Fibres are uniformly distributed to form a microporous structure, effectively absorbing sound waves, making them suitable for noise-reduction applications.
- Lightweight and easy to install: With a density range of 96–168 kg/m³, it is lightweight, easy to cut and install, reducing construction difficulty.
- Chemical stability: Resistant to acid and alkali corrosion, suitable for complex chemical environments.
- Seismic resistance and thermal stability: Maintains structural stability under high-temperature and vibration conditions, without cracking or deformation.
Applications and functions of ceramic fibre blankets
Ceramic fibre blankets are widely used in many fields due to their multifunctionality.
- In the industrial field, they provide thermal insulation and heat preservation in equipment such as steel smelting furnaces, petrochemical cracking furnaces, power boilers, and cement rotary kilns. This reduces energy consumption and extends the lifespan of equipment.
- Aerospace and military: Used in spacecraft thermal insulation layers and missile fire-resistant components, meeting extreme environmental requirements.
- Construction industry: Used for firewalls, soundproof walls, and high-temperature pipe insulation, providing both safety and energy-saving benefits.
- In home appliances, ceramic fibre blankets serve as insulation layers for ovens and fireplaces. This enhances equipment safety. With technological advancements, their application scope continues to expand. They demonstrate outstanding performance in emerging fields, such as new energy and environmental protection equipment.
Working Principle of Ceramic Fibre Blankets
The performance of ceramic fibre wool comes from their unique fibre structure and chemical composition.
- The fibre structure’s low thermal conductivity reduces heat transfer. Micro-pores between fibres further minimise convection and radiation.
- Sound Absorption Mechanism: The micro-pore structure of the fibres absorbs sound wave energy, reducing noise transmission, making them particularly suitable for noise control in industrial environments.
- Fire resistance and corrosion resistance come from the primary components: alumina and silica. These have high melting points and chemical inertness. They resist acid-alkali corrosion and high-temperature oxidation, ensuring long-term stability.
Usage methods for ceramic fibre blankets
Preparation before installation
- Inspect materials: Confirm that the model, thickness, and density of the ceramic fibre blanket meet usage requirements.
- Safety precautions: Wear dust masks, gloves, and protective clothing to avoid inhaling fibres or skin contact.
- Tool preparation: Prepare cutting tools, fixing nails, adhesives, or metal mesh as auxiliary materials.
Construction steps
- Measurement and cutting: Use specialised tools to cut the ceramic fibre blanket to the appropriate shape based on the dimensions of the equipment or pipes.
- Secure Installation: Use adhesive, fixing nails, or metal mesh to secure the blanket to the target surface, ensuring seamless adhesion.
- Layering and Sealing: For high-temperature areas, multiple layers can be stacked, with high-temperature resistant sealing materials applied at the seams.
- Inspection and Adjustment: After installation, check for any loosening or gaps to ensure effective thermal insulation.
Maintenance and Inspection
- Regularly inspect the surface of the ceramic fibre blanket for wear or cracks, and repair or replace as needed.
- Avoid liquid penetration into the blanket to prevent impaired insulation performance.
Purchasing and Procurement Guidelines
Selecting the Appropriate Type
Choose the appropriate type of ceramic fibre blanket based on the usage environment. For example, high-temperature furnaces require high-alumina or zirconia-containing types, while general industrial insulation can use standard types.
Key Parameters
- Density: 96–168 kg/m³, with higher density providing better insulation performance but increasing weight.
- Thickness: Common thicknesses range from 6–50 mm, selectable based on insulation requirements.
- Temperature resistance range: Ensure the blanket’s temperature resistance meets actual operating conditions.
Supplier Selection
- Select qualified suppliers, such as those certified under ISO 9001.
- Verify product test reports to ensure compliance with national or industry standards.
- Refer to user reviews and case studies to select reputable brands.
Procurement Channels
- Direct procurement: Contact manufacturers such as CVSIC.
- E-commerce platforms: Such as Alibaba and Made-in-China, offering diverse options.
- Notes: Avoid selecting products with excessively low prices to prevent poor-quality materials from affecting performance.
Cost and Cost-Effectiveness
The price of ceramic fibre blankets varies depending on density, thickness, and type, typically ranging from several dozen to several hundred RMB per square metre. When selecting products, consider both durability and performance to choose cost-effective options. Ceramic Fiber Blanket Types and Selection Guide
CVSIC offers a full range of ceramic fibre blankets, from standard types to zirconia-containing types, all certified with ISO certificates and compliant with national standards! Different kilns require different types of ceramic fibre blankets for compatibility. For example, high-alumina types are suitable for petrochemical furnaces, while zirconia-containing types are suitable for ultra-high temperatures. Clearly define your temperature and environmental requirements, and our engineers can help you select the appropriate product!
Sound insulation issues with ceramic fibre blankets
Principle of sound insulation performance
The microporous fibre structure of ceramic fibre blankets effectively absorbs sound waves, reducing noise transmission. Their sound insulation effects are particularly significant in industrial environments, such as noise reduction in power plants or petrochemical equipment.
Comparison with other materials
- Ceramic fibre blankets vs. rock wool: Ceramic fibre blankets have higher temperature resistance (1100–1430°C vs. 600–1000°C), but rock wool is slightly superior in low-frequency sound insulation.
- Ceramic fibre blanket vs. glass wool: Ceramic fibre blankets have stronger chemical stability and are suitable for acidic or alkaline environments, while glass wool is lower in cost but has poorer temperature resistance.
Limitations in practical applications
- Sound insulation performance is affected by installation quality; gaps or loose areas may reduce effectiveness.
- For extremely low-frequency noise, other materials should be used in combination to enhance effectiveness.
Ceramic Fiber Blankets Sound Insulation and Applications
How to use ceramic fibre blankets?
Proper installation and maintenance are key to maximising the effectiveness of ceramic fibre blankets! Here are some practical tips from CVSIC:
Preparation before installation
- Check the materials: Confirm the model, thickness, and density of the CVSIC blanket. For example, the high-alumina type is suitable for ultra-high temperature environments.
- Safety precautions: Wear a mask and gloves to avoid skin contact or inhalation of fibres.
- Tool preparation: Prepare a cutting knife, fixing nails, CVSIC-specific adhesive, or metal mesh.
Construction steps
- Precise cutting: Cut the CVSIC blanket according to the equipment dimensions, leaving some extra material to prevent gaps.
- Secure adhesion: Fix with CVSIC adhesive or fixing nails to ensure seamless adhesion.
- Layering: In high-temperature environments, multiple layers can be stacked, with seams treated using CVSIC high-temperature resistant sealing material.
- Thorough Inspection: Confirm no loosening or gaps, ensuring optimal thermal insulation performance.
Precautions for Using Ceramic Fibre Blankets
- Safety Precautions: Ceramic fibres may cause skin irritation or inhalation risks; protective gear must be worn during installation.
- Storage requirements: Store in a dry, well-ventilated environment to prevent moisture or compression.
- High-temperature safety: Ensure the blanket’s temperature resistance matches the working environment to avoid performance degradation due to overheating.
- Environmental disposal: Dispose of discarded ceramic fibre blankets in accordance with local environmental regulations to prevent improper disposal.
Conclusion
CVSIC ceramic fibre blankets are the ideal choice for high-temperature industrial applications, excelling in insulation, fire resistance, and noise reduction! As China’s leading industrial heating brand, we provide a comprehensive one-stop solution, from ceramic fibre to industrial furnaces. Choose CVSIC to make your equipment more efficient and safe! Contact us immediately to obtain a customised quote and professional support, and embark on a new chapter in high-temperature industrial applications!
FAQ
What is the difference between ceramic fibre blankets and alumina-silica needle-punched blankets?
The two are essentially the same; alumina-silica needle-punched blankets are an alternative name for ceramic fibre blankets. Both primarily consist of alumina and silica, with the naming difference stemming from industry convention.
How can the quality of ceramic fibre blankets be assessed?
- Inspect appearance: High-quality products have a pure white colour with uniformly distributed fibres.
- Verify parameters: Ensure that thermal conductivity, density, and temperature resistance meet requirements.
- Request test reports: Verify compliance with standards.
Is a ceramic fibre blanket suitable for household use?
It is suitable for high-temperature household appliances, such as fireplaces and ovens; however, professional installation is required to ensure safety and sound insulation.
