Basalt needle-punched felt filter bags are a high-performance inorganic fiber filtration material produced from melt-extruded basalt fibers. With superior high-temperature resistance compared to glass fiber, yet lower than carbon fiber, these filter bags are ideally suited for 300–450°C industrial filtration environments. They fill the gap in ultra-high temperature dust collection applications, providing a stable, efficient, and durable solution for industries requiring high-temperature particulate control.
Description
Product Features
- High Temperature Resistance
Designed for continuous operation at temperatures below 450°C, maintaining stable performance without degradation.
Special fiber formulation and high-temperature finishing processes enhance dust removal efficiency and service life compared to conventional materials.
- Excellent Corrosion Resistance
Highly resistant to acidic and alkaline environments, making them suitable for harsh chemical and metallurgical applications.
- Superior Mechanical Strength
Basalt fiber bags possess high tensile strength, with breaking strength typically above 3000 N, ensuring structural stability under high-temperature and high-pressure conditions.
- Dimensional Stability
Fiber elongation at break is only ~3%, providing minimal shrinkage or deformation, which maintains bag shape and filtration efficiency over time.
- High Dust Collection Efficiency
Captures 99–99.5% of particulate matter, including particles smaller than 0.5 μm, meeting stringent environmental emission standards.
- Low Pressure Drop and Good Air Permeability
High porosity and smooth surface ensure excellent airflow, with an empty bag pressure drop of only 2 Pa, reducing fan energy consumption.
- Adaptability to Dust Concentration
Suitable for high dust load operations, easy to clean, maintain, and operate, minimizing downtime.
- Long-term High-temperature Performance
Mechanical properties remain stable under continuous operation at 380°C, ensuring long-term reliability.
Manufacturing Process
- Raw Material: Ultra-fine basalt fiber yarn, specially treated for high-temperature resistance and easy ash removal.
- Felt Formation: Needle-punched process creates a robust, dense felt that combines strength, durability, and filtration efficiency.
- Finishing: Special heat-treatment ensures excellent thermal stability and corrosion resistance.
Specification
| Ingredients | Fiber | 100% CBF yarn (Φ 6.5 μ) |
| Scrim | 100% CBF high twist yarn (Φ 5 μ) | |
| Weight | g/m² | 780 |
| Thickness | mm | 1.8 |
| Permeability | L/dm²·min | 150 |
| Tensile breaking strength (N/5*20cm) | Warp | ≥2800 |
| Weft | ≥2800 | |
| Elongation @200N/5cm | Warp | <0.5 |
| Weft | <0.5 | |
| Maximum shrink of 90 mins | Temperature(°C) | 300 |
| % | 0 | |
| Service Temperature(°C) | Continuous | 350 |
| Instant | 400 | |
| Finishing | — | Inorganic finishing agent infiltration film treatment, water repellent condensation |
Applications
- Steel and Metallurgy: High-temperature flue gas and furnace dust collection.
- Chemical Industry: Filtration of corrosive and high-temperature chemical dust.
- Building Materials: Cement kilns and refractory material production.
- Power Generation: Boiler and thermal plant dust control.
Choose Filmedia®
Filmedia® offers a comprehensive range of dust collector filter bags, providing tailored solutions for a wide range of industrial applications. Leveraging its expertise in high-performance filter materials, Filmedia® provides custom-designed filter bags optimized for temperature, chemical corrosion, and particulate characteristics. Each solution includes technical guidance, installation support, and maintenance recommendations to ensure maximum dust collection efficiency, operational reliability, and extended service life in industries such as steel, metallurgy, chemicals, cement, power generation, and building materials.
