When the SF flotation machine is working, the motor rotates through the pulley and drives the spindle, and the impeller rotates with the spindle. Thus, a partial vacuum zone (negative pressure zone) is formed between the cover plate and the impeller. The air is sucked through the air cylinder by the suction pipe, and the slurry is sucked through the suction pipe, and the centrifugal force generated by the rotation of the impeller after the mineral river is mixed with the air, The edge of the well cover is guided into the groove. Due to the strong agitation of the impeller, the air in the slurry is dispersed into bubbles and evenly distributed in the slurry. When the suspended ore particles come into contact with the bubbles. The floatable ore particles adhere to the air bubbles and form a mineralized foam layer as the bubbles rise to the liquid surface, and the scraper scrapes out as a concentrate, and the ore particles remaining in the tank enter the next tank to be sorted.
The amount of aeration of the SF flotation machine can increase productivity and improve flotation. The main factors affecting the flotation machine's aeration:
The gap between the impeller and the cover plate: if the clearance is large, the amount of inflation is reduced, but the gap is too small, which may cause impact and friction between the impeller and the cover plate, and the amount of inflation is reduced. A suitable gap is 5 to 8 mm. Number of revolutions of the impeller: Within a certain range, the impeller rotates at a large speed, and the amount of inflation is also large, but the rotational speed is too large, the impeller wears quickly, the power consumption is large, and the slurry surface is unstable. In addition, some of the brittle ore is prone to muddy. Amount of slurry: When the amount of slurry entering the center of the impeller is most suitable, the amount of aeration is the largest. However, when the amount of the paddle is too large, when the production capacity of the impeller is exceeded, the slurry will block the air cylinder, and the suction is difficult, and the amount of inflation is decreased. In addition, the amount of internal slurry is large (i.e., the amount of slurry returned from the circulation hole on the cover plate to the impeller chamber), and the amount of inflation is large. But the power consumption will increase.
The concentration of the slurry in the upper part of the impeller: the larger the value, the larger the static pressure acting on the impeller, the increased the rotational resistance of the impeller, and the smaller the amount of inflation.
Due to the rotary motion of the flotation machine impeller, the air is broken into bubbles and evenly distributed in the slurry, so that the ore particles are suspended and contacted with the bubbles, and the flotation agent can fully function with the frame.
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