Dust filter bags are the heart of any baghouse dust collector — the filter media that captures particulate matter from cement plant exhaust gases. LIMING supplies filter bags in five specialized media types, each engineered for specific temperature ranges and gas compositions to ensure emissions compliance and long service life.
In a baghouse dust collector, dirty gas flows through tubular woven or felted filter bags that capture dust particles on their surface while clean gas passes through. The accumulated dust forms a filter cake that actually improves filtration efficiency, and is periodically dislodged by pulses of compressed air (pulse-jet cleaning) or reverse airflow, dropping into the collection hopper below.
Selecting the correct filter bag material is critical for cement plant operations. The gas stream from a cement kiln, raw mill, or coal mill varies dramatically in temperature, moisture content, and chemical composition (SO₂, NOₓ, acid gases, alkali vapors). A filter bag that performs well at 150°C in a raw mill may fail rapidly at 220°C in a kiln exhaust. LIMING's material selection guide below helps you choose the right media for your specific application.
All LIMING filter bags are manufactured with precision stitching, reinforced bottoms, and compatible collar styles (snap ring, flange, or ring cap) to match your specific baghouse tube sheet design. We produce bags for all major dust collector brands and can reverse-engineer from your existing used bags.
Choosing the right filter media depends primarily on the continuous operating temperature and the chemical composition of the gas stream. Use this guide to match your application to the correct material:
| Material | Max Continuous Temp | Max Surge Temp | Chemical Resistance | Best Application |
|---|---|---|---|---|
| Nomex (Aramid) | 200°C | 230°C | Good acid resistance, poor alkali | Raw mill, cement mill, cooler exhaust |
| PPS (Polyphenylene Sulfide) | 190°C | 210°C | Excellent acid & alkali resistance | Coal mill, kiln exhaust with high SO₂ |
| P84 (Polyimide) | 240°C | 260°C | Good acid resistance, moderate alkali | Kiln exhaust, high-temperature filtration |
| PTFE (Teflon) | 250°C | 280°C | Excellent acid, alkali & oxidation | Aggressive gas, extreme temperature |
| Fiberglass | 260°C | 280°C | Excellent acid, poor alkali (with coating) | Kiln exhaust, high-temp continuous duty |
Expert material selection, premium filter media, and complete baghouse support.
We analyze your gas temperature profile and recommend the optimal media — no costly over-specification or premature failure.
Filter fabrics sourced from top-tier manufacturers. Consistent fiber quality, needle-punch density, and permeability.
Five media types covering 130-260°C. All collar styles, diameters, and lengths available for any baghouse model.
Filter bag cages supplied in matching dimensions — ensure proper bag support and prevent collapse during operation.
| Parameter | Specification |
|---|---|
| Product Type | Tubular filter bag for baghouse dust collector |
| Material Options | Nomex, PPS, P84, PTFE, Fiberglass |
| Fabric Type | Needle-punched felt or woven fabric |
| Diameter | 120 mm, 130 mm, 150 mm, 160 mm, 180 mm, 200 mm (custom) |
| Length | 2,000 mm – 8,000 mm (custom) |
| Collar Style | Snap ring, flange, ring cap, raw top (per tube sheet) |
| Bottom Style | Flat sewn, rounded, or reinforced |
| Fabric Weight | 450-550 g/m² (material dependent) |
| Permeability | 10-25 m³/m²/min @ 1242 Pa |
| Treatment | PTFE coating, anti-static, flame retardant (optional) |
| Expected Lifespan | 1-3 years (temperature and gas dependent) |
| Lead Time | 7-20 days (stock materials), 20-30 days (custom) |
Filter bag service life varies significantly based on operating conditions. Understanding the factors that affect lifespan helps optimize replacement scheduling and reduce total cost of ownership:
Filter media selected per application — needle-punched felt or woven fabric in the specified fiber type.
Fabric cut to precise tube dimensions using automated cutting tables for consistent sizing.
Triple-stitched seams with compatible high-temperature thread. Reinforced bottoms and collar attachment.
Optional PTFE coating, anti-static treatment, or flame-retardant treatment applied per requirements.
Dimensional check, seam integrity test, and permeability verification before packaging.