I. System Composition:
The jet mill system consists of an air compressor, air storage tank, refrigerated air dryer (including filters), jet mill main unit, high-precision classifier, cyclone collector, pulse bag filter, high-pressure induced draft fan, control cabinet, and material loading/unloading systems.
Working Principle:
After being cooled, filtered, and dried, the compressed air is injected into the grinding chamber through nozzles to form supersonic airflow, fluidizing the material. The accelerated material converges at the intersection points of the jet streams from multiple nozzles, where intense collisions, frictions, and shearings occur, resulting in ultrafine grinding of particles. The pulverized material is then conveyed to the impeller classification area by the rising airflow. Under the action of the centrifugal force of the Classifier Wheel and the suction force of the fan, the coarse and fine powders are separated. The coarse powder returns to the grinding chamber for further grinding due to its own gravity, while the qualified fine powder enters the cyclone collector with the airflow. The fine dust is collected by the bag filter, and the purified air is discharged by the induced draft fan.
II. Performance Advantages and Characteristics:
Based on the traditional fluidized bed mill design, our company's unique self-dividing classification technology has significantly improved its performance compared to domestic and international fluidized bed jet mills.
- Low energy consumption, saving up to 30% compared to traditional fluidized bed jet mills.
- Built-in self-dividing micro-powder classifier, ensuring concentrated particle size distribution and no oversized particles in the finished product.
- Compact equipment structure with a small footprint.
- No material residue in the grinding chamber, easy to dismantle, clean, and sterilize, convenient for changing product varieties, and compliant with GMP requirements.
- Low-temperature and non-medium grinding, especially suitable for materials with low melting points, heat sensitivity, sugar content, and volatility.
- For flammable and explosive materials, inert gas can be used as the medium to achieve fully enclosed grinding. The inert gas is recycled with minimal loss.
- Wide range of grinding particle sizes, adjustable from 3 to 180um; various models available with production capacities ranging from 5 to 3000kg/h.
- Negative pressure production, no dust pollution, and an excellent working environment.
- High automation level, strong stability, and easy operation.
III. Application Fields:
Widely used in industries such as chemicals, mining, abrasives, refractory materials, battery materials, metallurgy, building materials, pharmaceuticals, ceramics, food, pesticides, feed, new materials, and environmental protection for ultrafine grinding, dispersion, and particle shaping of various dry powder materials.
Hard Materials: Quartz sand, garnet, silicon carbide:
The SCWN series can ultrafinely grind hard materials with Mohs hardness above 7, such as quartz sand and garnet. Its low-temperature grinding, high-purity operation, high machining finish, and easy cleaning characteristics make the jet mill series ideal for fine grinding of these materials. Depending on the principle of airflow classification, 1-3 classifier heads can be equipped according to user needs, and 1-2 finished product segments can be collected at once.
Abrasives, Refractory Materials, and Heat-Sensitive Materials:
The SCWN series can ultrafinely process hard materials with Mohs hardness above 7 under supersonic airflow. The application of fluidized bed grinding and vertical turbine classifier ensures minimal wear and tear on the equipment. The classifier wheel speed is adjustable, and the grinding parameters can be optimized. Multiple classifiers can be combined to achieve narrow-band classification of several particle size ranges at once. Typical products include diamond, silicon carbide, emery, alumina, boron carbide, tungsten carbide, special ceramics, etc.
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