Spiral / Disc Jet Mill
Spiral Jet Mill
Compact, no rotating parts. Suited for R&D validation, small-batch production, and multi-product switching. Quick-release design enables material changeover cleaning in under 30 minutes — an efficient choice for fine chemicals, pharmaceutical intermediates, and mineral powders.
Working Principle
Process Flow
High-Speed Injection
Rotary Collision
Self-Classification
Collection
Key Features
Compact Layout
Flat disc chamber, no rotating parts. Small footprint, easy to install in lab or production environments.
Fast Cleaning
Quick-release design allows material changeover cleaning in under 30 minutes — ideal for multi-product production.
Low Temperature Rise
Gas expansion cooling keeps grinding zone temperature low, suitable for heat-sensitive and low-melting-point materials.
Minimal Metal Contamination
Primarily particle-to-particle self-impact. Wear-resistant contact materials available to meet purity requirements.
Simple Maintenance
No rotating parts means low day-to-day maintenance, suitable for lab and small-batch production environments.
Flexible Small-Batch Operation
Covers 10–10,000 kg/h range for small-batch multi-product operations with high process validation efficiency.
Applications by Industry
| Industry | Typical Materials |
|---|---|
| Pharmaceutical & Chemical | Pharmaceutical intermediates, agrochemicals, dyes, pigments |
| Fine Chemicals | Specialty coatings, plastic additives, rubber fillers |
| Mineral Non-Metals | Calcium carbonate, talc, mica, fused silica |
| Food & Health | Spices, plant extracts, nutraceutical ingredients |
| New Materials R&D | Small-batch process validation and formulation testing for new materials |
Model Specifications
The figures below are reference values for typical materials. Actual capacity varies with material density, hardness, and target particle size.
| Model | Ref. Capacity | Product Size D97 | Feed Size |
|---|---|---|---|
| DWC-5.5A | 10–50 kg/h | 10–200 µm | ≤10 mm |
| DWC-15A | 50–200 kg/h | 10–200 µm | ≤10 mm |
| DWC-30A | 150–600 kg/h | 10–200 µm | ≤10 mm |
| DWC-55A | 300–1500 kg/h | 10–200 µm | ≤10 mm |
| DWC-110A | 500–3000 kg/h | 10–200 µm | ≤10 mm |
| DWC-220A | 1000–10000 kg/h | 10–200 µm | ≤10 mm |
Request a Selection Proposal
Tell us your material, batch size, and fineness requirements. We will recommend the right model and arrange a sample test.
- Material name and properties (hardness, melting point, tendency to cake)
- Target particle size: D97 or residue specification
- Batch size and changeover frequency
- Any GMP or cleanliness requirements
Contact Us
Submit material name, target fineness, and approximate batch size. We will reply with a selection recommendation.
Online Inquiry Arrange Sample TestingPhone: 0816-2680206
Frequently Asked Questions
What is the finest particle size the spiral jet mill can achieve?
Typically D97 10–200 µm. The finer the material (more brittle, softer), the finer the achievable particle size. Because there is no inline classifier wheel, the size ceiling is more influenced by air pressure and feed rate. If strict particle size control is needed, a fluidized bed jet mill should also be considered.
Can it run continuously, or is it batch-only?
The spiral jet mill supports continuous feeding, but is better suited for small-batch or intermittent production. For long continuous runs with larger capacity, fluidized bed jet mills generally offer better stability and ease of maintenance.
How long does a material changeover cleaning take?
Depends on the configuration and cleanliness requirement. With quick-release design, typically under 30 minutes. GMP pharmaceutical materials may require a more thorough cleaning protocol and longer time.
Can spiral mill trial data be used for fluidized bed mill selection?
It can serve as a reference, but the two mill types differ in classification mechanism — particle size distribution and capacity characteristics may vary. The recommended approach is to confirm process feasibility on the spiral mill, then run a scale-up trial on a fluidized bed mill before finalizing the selection.