Contact: General Manager Wang
Mobile: +86 13862704321
Tel: +86-513-88402039
Email：wjf@ywjx.net
Website：www.ywjx.net
Address: No. 88 Fuqian Road, Baidian Town, Haian County, Jiangsu Province, China
The filter bag cage is a core supporting component in industrial dust collection equipment such as pulse-jet baghouse dust collectors and silo-top dust collectors. Serving as the "skeleton" of the filter bag, its primary functions are to maintain the shape stability of the filter bag and ensure smooth filtration and cleaning processes. It directly affects filter bag service life, dust collection efficiency, and equipment operational stability. Widely used in industrial manufacturing, chemical processing, building materials, metallurgy, power generation, and other sectors, it is an indispensable key accessory in dust collection systems.
Core Functions
1. Supporting the Filter Bag: The dust collector bag cage provides rigid structural support to the filter bag, preventing it from collapsing or deforming under exhaust gas pressure, dust accumulation, or cleaning pulse impact, ensuring the filter bag maintains an expanded filtration space at all times.
2. Ensuring Smooth Airflow: The structural design of the bag cage (e.g., longitudinal wire distribution and spacing) guides airflow evenly through the filter bag, reducing airflow resistance and increasing the processing capacity of the dust collection equipment.
3. Assisting Dust Cleaning: During cleaning cycles (e.g., pulse-jet blowing), the bag cage transmits impact force to help the dust layer on the filter bag surface detach quickly, preventing dust adhesion ("bag blinding") and reducing equipment operating resistance.
4. Extending Filter Bag Life: Reduces filter bag damage caused by excessive stretching, friction, and extrusion. It also prevents direct contact between the filter bag and the dust collector inner wall, minimizing wear risk and extending the filter bag service life by 30%–50%.
5. Facilitating Installation and Maintenance: The standardized bag cage structure allows for rapid assembly with filter bags and easy disassembly, reducing equipment maintenance costs.
Material Classification
| Material Type | Key Characteristics | Temperature Resistance | Corrosion Resistance | Application Scenarios |
| Carbon Steel（Q235） | High strength, low cost, good workability, prone to rusting | ≤120℃ | Poor (without anti-corrosion treatment) | Ambient temperature, dry, non-corrosive dust conditions (e.g., grain processing, mechanical processing – ambient dust) |
| Galvanized Carbon Steel | Carbon steel substrate with zinc coating (hot-dip galvanized / electro-galvanized); improved corrosion resistance, moderate cost | ≤120℃ | Moderate (resists mild moisture, no acids/alkalis) | Ambient temperature, mildly humid conditions (e.g., building materials – cement dust, mining – crushing dust) |
| Stainless Steel（304） | Good corrosion resistance, high strength, non-rusting, higher cost than carbon steel | ≤200℃ | Good (resists weak acids/alkalis and moisture) | Medium temperature, humid or mildly corrosive conditions (e.g., chemical industry – weak acid/alkali exhaust, non-ferrous metal smelting – ambient dust) |
| Stainless Steel （316L） | Excellent corrosion resistance (resists strong acids, strong alkalis, chlorine-containing gases); better high-temperature resistance than 304; higher cost | ≤250℃ | Excellent (strong corrosion, high humidity) | Harsh conditions (e.g., highly corrosive chemical exhaust, high-temp high-humidity dust, waste incineration flue gas) |
| Titanium Alloy | Excellent corrosion and high-temperature resistance, high strength, lightweight, extremely high cost | ≤400℃ | Superior (extreme corrosion, high temperature) | Special applications (e.g., nuclear industry, aerospace – specialty dust treatment) |
Application Scenarios by Industry
- Chemical Industry: Strong corrosion, high humidity, medium-to-low temperature (some high temperature) → 316L stainless steel bag cages, spray-coated carbon steel bag cages (for mild corrosion), PTFE-coated bag cages (for extreme corrosion).
- Building Materials Industry (Cement, Tiles): Ambient temperature, high dust concentration, mild humidity → Hot-dip galvanized carbon steel bag cages, 304 stainless steel bag cages (for severely humid areas).
- Steel Industry (Sintering, Blast Furnace): High temperature (150–200°C), high dust concentration, mild corrosion → 304/316L stainless steel bag cages, high-temperature spray-coated bag cages.
- Non-Ferrous Metals Industry (Aluminum Electrolysis, Copper Smelting): High temperature, fluoride/sulfide-containing corrosive gases → 316L stainless steel bag cages, titanium alloy bag cages.
- Power Industry (Boiler Dust Collection): High temperature (200–250°C), high humidity, moderate corrosion → 316L stainless steel bag cages, high-temperature resistant stainless steel bag cages.
- Grain Processing / Mechanical Processing: Ambient temperature, dry, non-corrosive → Electro-galvanized / hot-dip galvanized carbon steel bag cages.
