Key Technical Parameters

Applicable Materials
Potassium feldspar, ceramic powder, calcium hydroxide, river pebbles, granite, basalt, iron ore, limestone, quartzite, dolerite, construction waste, iron ore, gold ore, etc.

Product Overview

Highlight Advantages

    In the stone powder industry, to enhance the efficiency of the powder grinding system and reduce the energy consumption of products, the circular flow grinding system is now widely used. As an essential component of this system, the performance stability of the separator directly impacts the efficiency of the system. Therefore, the research and development of separators has always been a focus of scientific research institutions and industrial and mining enterprises.
The JDD series High-Efficiency Stone Powder Separator is a new type of separator developed and produced by Jiangsu Jidingda Company's technical team, which combines foreign powder selection technology and effectively applies the theory of flat vortex flow to the cyclone separator. Proven in use, it achieves a separation efficiency of 85-90% and offers convenient and flexible fineness adjustment, with stable and reliable performance.
Compared to traditional classifiers, the JDD series high-efficiency anti-dew combination twin-rotor classifier boasts the following unique advantages:
1. Equipped with a removable, modular propeller-type spreader. It not only serves as a spreading function but also generates an upward air flow, causing the material particles on the spreader blades to boil and disperse. This enhances the grading and dispersibility of the material particles.
2. Advanced grading principle. Combining multiple powder selection mechanisms, utilizing the equilibrium between centrifugal force in opposite directions and the centripetal airflow attraction, the material passes through the grading interface and the selection zone distinctly, thus achieving high grading accuracy.
3. The cascading lower rotor re-raises and disperses the coarse particles separated from the upper selected powder chamber, further separating out qualified fine powder while ensuring the uniformity of the swirling air flow within the machine.
4. The main shaft of the sifter adopts variable-speed technology, with easy fineness adjustment, high sensitivity, and reliability, offering a wide range of adjustment.
5. The sifting area has been redesigned and the space range of the lifting zone has been expanded, enhancing the sifting efficiency.
6. Utilize high-efficiency, low-resistance cyclone dust collectors, with low equipment resistance and high dust collection efficiency.
7. The unit features an optimized design with an elastic sweeper and various anti-condensation devices, providing excellent anti-condensation performance.
8. All vulnerable parts are protected with innovative multi-stage shims, effectively extending the main unit's lifespan.
9. The rotating system utilizes a dry oil work station system, successfully resolving the issue of bearing vulnerability.
10. The use of statically determinate structures ensures the machine runs virtually vibration-free; the incorporation of dust-reducing and vibration-reducing fans further reduces system vibration.
11. The coarse and fine powder pipes are equipped with dual-locked air valves, significantly reducing air leakage rates and overcoming the previous defect of excessive dust generation in the separator.

Operating Principle

1、Material enters the inner shell of the separator from the upper hopper of the classifier, falls onto the integrated impeller spreader disc that is part of the rotor, and is scattered outward due to the high-speed rotation of the spreader disc. Simultaneously, it is lifted upwards by the upward airflow generated by the impeller spreader disc blades, forming a material boil on the blades. Finer particles float upwards in a suspended, dispersed state, while coarser or heavier material is dispersed by the spreader disc blades and falls along the cylinder wall, completing the first stage of classification.
2. A blower is located beneath the spreading pan, which lifts fine particles from the coarse powder back into the circulating air for reclassification. The coarse powder then passes through a dripping device and is discharged from the inner cone.
3. A cage-type impeller is located above the sifter. The airflow and the material dispersed in the airflow near the surface of the classifier's cage-type impeller rotate at high speed along with the classifier circle. As they rotate rapidly, a uniform and strong swirling airflow is formed around the classifier circle. Within this area, the relationship between centrifugal force and suction force at any position remains constant. The centrifugal force exerted on the material in the airflow can be adjusted by varying the speed of the motor's main shaft. As the speed increases, this force also increases. If the air volume is maintained constant, the particle size of the cut decreases, resulting in a finer product. Conversely, if the speed is reduced, the product becomes coarser.
4. After the upper rotor is graded, the fine particles enter the various cyclone dust collectors through the circulating air. Thanks to the newly designed cyclone dust collectors, which have added guide vanes at the inlet, a reflecting screen in the inner cone, and a decelerating plate at the bottom, the fluid resistance of the cyclone dust collectors is significantly reduced. Under the action of the guide vanes, the circulating air enters the cyclone collector at a higher speed. As the air speed suddenly drops in the expanded part of the snail horn, the particles are accelerated to settle, thereby improving the dust collection efficiency of the cyclone dust collector.

Utilize on-site

The classifier's internal surface is lined with abrasion-resistant ceramic to prevent iron ions from contaminating the powder.

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