FJ Series Coanda Jet Classifier
The FJ Series is a Coanda jet classifier for dry powder separation in the 1–200 µm range. Feed particles enter through a high-dispersion nozzle and are separated into fine, medium, and coarse fractions simultaneously — no rotating parts, no contact wear. Throughput scales from 10 to 2700 kg/h across two models, with closed-loop inert gas operation available for reactive or hazardous powder processing.
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SPECIFICATIONS
| Model | Scale | Air Flow | Throughput |
| FJ-200 | Lab / Pilot | 4–7 m³/min | 10–150 kg/h |
| FJ-200 | Production | 44–88 m³/min | 200–2700 kg/h |
OPERATING PRINCIPLE
The FJ classifier separates particles using the Coanda effect.
Compressed air accelerates through an inlet nozzle and curves along the Coanda surface inside a sealed classification chamber. Feed powder is dispersed at the nozzle inlet and carried into the curved airstream.
Separation occurs by differential inertia:
- Fine particles follow the curved airflow path
- Coarse particles deflect outward
Three particle fractions — fine, medium, and coarse — discharge simultaneously from separate outlets in a single pass. No screen, impeller, or rotating parts are present in the classification zone.
KEY FEATURES
- No rotating parts in the classification zone → zero mechanical contamination risk
- Three-stream simultaneous output – fine, medium, and coarse in a single pass
- Classification range: 1–200 μm | Throughput: 10–2700 kg/h
- Inert gas closed-loop operation available for oxidation-sensitive or combustible materials
- Wear-resistant contact surfaces standard for abrasive and hard powder feeds
EXPERIMENT RESULTS
Iron Powder Classification – Target Cut: 22 μm
- Feed: Fe powder, 20–45 μm, density 4 g/cm³
- Fine fraction D90 = 18.99–19.65 μm (meets <20 μm target)
- Coarse fraction D10 = 13.97–14.3 μm, D50 = 28.69–29.68 μm (coarse stream recyclable to feed)
Alumina Classification – Target: D97 ≤ 11.8 μm
- Feed: Al₂O₃, D50 = 7.05 μm, D97 = 19.06 μm, D100 = 34.26 μm
- First-pass fine fraction D97 = 7.9–8.3 μm (meets ≤11.8 μm target)
- Two-pass cascade yields combined product at 10% of total feed weight
APPLICATIONS
| Category | Examples |
|---|---|
| Metal Powder | Fe, Cu, and alloy powders for powder metallurgy and additive manufacturing |
| Advanced Ceramics | Al₂O₃, ZrO₂, SiC, TiO₂ for structural and electronic ceramic components |
| Rare Earth Polishing Powder | CeO₂ and SiO₂ for precision surface finishing |
| Toner and Powder Coatings | Narrowed particle size distribution for uniform flow and coating performance |
| Pharmaceutical Powder | API and excipient powders for dissolution and bioavailability specifications |
| Pigments and Magnetic Materials | Fine fraction extraction for color intensity and magnetic performance |
Enquiry
Tell us your material, target particle size, and throughput. We will advise on
model selection and run a trial on your own powder before you commit to equipment.
Yibin Andy Wei — Application Engineer
Email: [email protected]
LinkedIn: Yibin Andy Wei
WhatsApp: +1 380 900 2442
Call Us or Fill the Form
- Jessie Yao
- +86-510-83390800
- +86 18921109791(Wechat)
- [email protected]
- C2, Quantum Industrial Park, Qianzhou Street, Huishan District, Wuxi City, Jiangsu, China