Working principle:
The basic principle of dense medium coal preparation is Archimedes' principle. The medium is tangentially fed into a section of cyclone from the feeding tube at a certain pressure, and under the action of the inlet pressure, a centrifugal force field is generated in the sorting cylinder, and a downward inner spiral flow and an upward outer spiral flow are formed. At this time, the material (raw coal) is fed into a section of cyclone by the central feeding method from the feeding pipe, and under the action of centrifugal force, the coal particles are rapidly stratified from the center of the cyclone to the wall according to different densities: Materials smaller than the separation density gather toward the center, and enter the overflow port with the inner swirl flow to become light products (ie, clean coal); materials larger than the separation density move toward the wall of the vessel through the separation density interface, and flow through the outer swirl. The first section of the bottom flow port to the connecting pipe enters the second section of the cyclone and then selects. Under the pushing action of centrifugal force and external swirl, the heavier particles move along the cylinder wall to the direction of the coal feeding port, resulting in the phenomenon of concentration and classification, which increases the density of the suspension entering the second-stage cyclone. , the density of the second-stage separation is naturally increased, and the heavy products (ie, the mixture of medium coal and gangue) are effectively re-sorted. Thereby, intermediate products (ie, medium coal, we often call it mud) and heavy products (ie, gangue) are obtained.
Uses and Features:
The raw coal adopts the pressureless feeding method, the density of gangue is high, and the amount of secondary coal slime and over-pulverization are obviously reduced.
Flexible product structure, stable quality, external second-stage cyclone resuspension density online adjustment device;
The upper limit of selection is high, the sorting effect is good, and the sorting accuracy is high;
