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Mechanical Sand Selection Mill

·Feed Material Granularity:≤5mm 【Production Capacity】20-400t/h
Application Fields
Mechanical sand and stone quarries, mining operations, coal mining, concrete batching plants, dry mortar, quartz sand, etc.
Applicable Material
River pebbles, granite, basalt, iron ore, limestone, quartz stone, dolerite, construction waste, iron ore, gold ore, etc.

Product Overview

In the trend of increasing emphasis on energy conservation and environmental protection, and with the strong promotion of dry sand-making processes to replace traditional water-washing sand machines, we have independently researched and developed a special sand and stone line classifier.

JDD Mechanism Sand Selection MillSignificant energy-saving effect, reduces dust emissions, meets environmental protection standards, excellent sorting performance, easy to control stone powder content, convenient, sensitive, and reliable fineness adjustment, strong automatic control capability, easy maintenance,保养, and repair, compact structure, small land occupation, cost-effective equipment investment, short payback period. It is a product that replaces traditional water-washing sand washing machines.

Compared to traditional sifter machines,JDDThe Mechanized Sand Selection Mill boasts the following unique features.
1High separation efficiency: Utilizes a propeller-type spreader disk. It not only serves as a spreading device but also generates an upward air current. The material particles on the spreading blade surface are agitated, creating a dispersed state, which enhances the grading and dispersing properties of the particles.
2Advanced sorting principle: Breaks through the traditional water-washing sorting principle, utilizing a dual grading force field of gravity and centrifugal grading. Materials are sorted within the grading chamber, where they are subjected to strong vortex and tangential shearing forces, resulting in good dispersion and high grading strength. The grading efficiency is high, and each sorted material passes through a clearly defined selection zone with stable and consistent selection conditions, thus ensuring high sorting accuracy.

3Easy operation: Utilizes an inverter for variable speed control, allowing easy adjustment of the spindle speed, fine-tuning with wide range and sensitive reliability.
4Optimized the design of the selection area and the upgrading area, expanding their spatial range, thereby enhancing the sorting efficiency.
5The snail horn at the new cyclone inlet has been redesigned, additional wind guide plates have been installed, and a new cyclone sleeve structure has been developed, reducing fluid resistance and enhancing the dust collection efficiency of the cyclone筒.
6The unit is optimized with various anti-condensation devices, offering excellent anti-condensation performance.
7. Optimized the design of anti-dew devices such as flexible sweepers inside the machine, with excellent anti-dew performance.
8. All vulnerable parts are protected with new multi-stage shims, effectively extending the main unit's lifespan.
9. The rotating system employs a dry oil work station system, effectively resolving the issue of easily damaged bearings.
10. Utilization of statically determinate structures ensures minimal vibration operation of the entire unit; the use of dust-proof and vibration-reduction fans further reduces system vibration.
11. Coarse and fine powder pipes are equipped with double-locked air valves, significantly reducing air leakage and overcoming the previous issue of excessive dust generation from the separator.

Operating Principle

1. Material enters the inner shell of the separator through the upper hopper, falls onto the integrated combination paddle撒料盘 attached to the rotor, and is scattered outward due to the high-speed rotation of the撒料盘. Simultaneously, it is lifted upwards by the ascending air flow generated by the paddle blades, creating a boiling effect on the paddle盘 blades. Finer particles rise upwards in a suspended and dispersed state, while coarser or heavier material is scattered by the paddle blades and falls along the筒壁, completing the primary separation.

2. A guide vane is located below the spreading disk, creating a vortex that disperses the heavy material falling along the cylinder wall. The fine powder is lifted upwards and re-enters the circulating air for further classification. The coarse powder is then discharged through a drip device from the inner cone.

3. A cage-type rotor is positioned above the撒料盘. Inside the selection chamber, the air flow and the material dispersed in the air flow near the surface of the upper cage-type rotor classifier circle rotate at high speed together with the classifier circle. This creates a uniform and strong swirling air flow around the classifier circle. In this area, the relationship between centrifugal force and suction force at any position remains constant. The centrifugal force exerted on the material in the air flow can be adjusted by varying the speed of the motor's main shaft. As the speed increases, so does the force. If the air volume is maintained constant, the particle size of the finished sand decreases while the content of powder in the finished sand increases; conversely, if the speed is reduced, the content of fine powder in the finished sand decreases.

4. After being graded by the cage-type rotor, the fine particles are drawn into the external cyclone dust collectors with the circulating air. Due to the newly designed cyclone dust collectors, which have added guide vanes at the inlet, reflective screens in the inner cone, and speed-reducing plates at the bottom, the fluid resistance of the cyclone dust collectors has been significantly reduced. Under the action of the guide vanes, the circulating air enters the cyclone collector at a higher velocity. As the air velocity suddenly drops in the expanded helical section, particle settling is accelerated, thereby enhancing the dust collection efficiency of the cyclone dust collectors.

Technical Specifications

Mechanical Sand Separator Technical Specifications Sheet (This material can be replaced by part of the powder)

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