Working principle of rotor-stator system based on:
In rotor-stator system, rotor design is the main aspect that determines the technological performance of flotation machine. However, the role of stator should not be underestimated.
Centrifugal impeller
The stator is arranged at the periphery of the rotor. Most strip impellers also have stators around them, and only umbrella impellers use slot bottom flow stabilizing plates instead of stators. The annular impeller also needs to be used in combination with the flow stabilizer. The arc-shaped vertical blades on the flow stabilizer guide the slurry-gas mixture to rise uniformly, that is, the slurry-gas mixture will
tangential velocity
Maximize the transformation into
radial velocity
Then turn up, otherwise there will be liquid level rotation and waves. Usually, the stator consists of guide blades fixed on the cover plate of the impeller and radial blades installed at the bottom of the tank of the flotation machine. These two types of blades are also called diffusers. The role of stator is the same as that of flow stabilizer, mainly to eliminate
ore pulp
Rotate to ensure the liquid level is stable. When the pulp thrown by the impeller collides with the stator blades, a new vortex will be generated. Conducive to entrainment (segmentation) of air and bubble splitting. Therefore, the quality of stator design will affect the stability and inflation of foam layer.
Electric flotation machine
triangle belt
The transmission drives the impeller to rotate, resulting in centrifugal action to form negative pressure. On the one hand, enough air is inhaled to mix with the pulp, on the other hand, the pulp is stirred to mix with the medicine, and at the same time, the foam is refined, so that minerals attach to the foam and float to the surface of the pulp to form mineralized foam. Adjust the gate height, control the liquid level, and let the useful foam be scraped out by the scraper.
Muddy coal
After the impeller rotates, negative pressure is formed in the wheel cavity, so that the slurry at the bottom of the groove and in the groove respectively enters the mixing area through the lower suction port and the upper suction port of the impeller, and the air also enters the mixing area along the guide cover, where the slurry, air and medicine are mixed.
Working principle of flotation machine:
In the impeller
centrifugal force
Under the action of, the mixed pulp enters the mineralized area, and the air forms bubbles and is crushed, and fully contacts with coal particles to form mineralized bubbles.
turbulence
Under the action of the plate, it is evenly distributed in the cross section of the tank, moves upward into the separation zone to form a foam layer, and is discharged by the foam scraping mechanism to form a foam layer.
clean coal
Foam.
The sorting rotary ring rotates slowly. When the separation chamber enters the flotation zone, the selected materials are transported to six separation points through the slurry separator, and the weakly magnetic mineral particles are attracted to the toothed plate and rotate with the separation ring. Under the action of gravity and slurry flow, non-magnetic mineral particles pass through the gap of toothed plate and are discharged into the tailings tank at the lower part of the sorting ring. When the sorting room is transferred to the cleaning position of the coal, a small amount of cleaning water is sent in and mixed.
gangue
Symbionts and slime are washed into the tail tank (the machine is not equipped with a middling tank) to achieve improvement.
Focus (attention)
The purpose of quality. When the sorting chamber is turned to the weak magnetic field position (concentrate washing area), pressurized water is injected to wash the weak magnetic ore particles adsorbed on the toothed plate into the concentrate tank. Then the sorting chamber turns to another magnetic field with opposite polarity. Each sorting ring rotates once, and each sorting chamber repeats 6 times.