Aramid filter bags are used for high-temperature dust and particle removal in demanding industrial settings. They are made by needle-punching aramid fibers, offering exceptional heat resistance and durability.

Here’s a more detailed look at Aramid needle felt filter bags:

Manufacturing and Properties:

• Material: These bags are constructed from 100% aramid fibers, such as Nomex®, which are needle-punched to create a robust, non-woven felt fabric.
• Needle Punching: The aramid fibers are mechanically interlocked through the needle-punching process, resulting in a strong and porous filtration medium.
• Treatments:
  • While aramid is inherently heat-resistant, additional treatments can be applied to enhance specific properties:
  • Hydrolysis Resistance: Treatments can be applied to improve resistance to moisture related degradation.
  • Chemical Resistance enhancement: Specific coatings can be applied to increase resistance to particular chemicals.
• Construction: The felt fabric is precisely cut and sewn into bags, typically with a snap ring or other attachment mechanism for secure installation onto filter cages.
• Durability: These bags are renowned for their exceptional resistance to high temperatures, abrasion, and chemical exposure, ensuring a long service life.
• Dimensional Stability: Aramid fibers maintain their shape and size under high temperatures, providing consistent filtration performance.
• Temperature Resistance: Aramid filter bags can withstand continuous operating temperatures up to approximately 204°C (400°F), with short-term temperature spikes reaching higher.
• Fire Retardancy: Aramid fibers inherently resist burning.

Applications:

• Cement Industry: Used for filtering dust from kiln exhaust and other high-temperature processes.
• Asphalt Plants: Essential for removing particulate matter from hot asphalt mixing fumes.
• Steel Mills and Smelting Plants: Effectively collects dust and pollutants from furnace gases.
• Power Plants: Used for filtering fly ash from boiler exhaust.
• Chemical Industry: Handles corrosive gases and dust in various chemical processes.
• Waste Incineration: Filters combustion gases.

Advantages:

• High-Temperature Resistance: Capable of withstanding extreme temperatures, making them ideal for demanding industrial applications.
• Chemical Resistance: Offers good resistance to various chemicals, extending their lifespan in harsh environments.
• Durability: Robust construction and inherent fiber strength provide excellent resistance to abrasion and tearing.
• Dimensional Stability: Maintains shape and size under high temperatures, ensuring consistent filtration performance.
• Fire Retardancy: Offers enhanced safety in industrial settings due to the fibers inherent resistance to burning.