Correct adjustment of flotation slurry surface

Flotation of minerals is generally carried out by various types of flotation machines.

The flotation machine usually consists of a box body, a steady flow plate, a rotating shaft, an impeller, a cover plate and an air suction pipe. The slurry is fed or inhaled from the bottom. The pulp is swayed around due to the rotation of the rotating shaft. The rotation of the rotating shaft forms a vacuum zone between the impeller and the cover plate, which causes the slurry to circulate from the bottom to the top in the vertical plane, and the air sucked by the suction pipe is dispersed into small bubbles between the impeller and the cover plate, plus The role of the foaming agent and the collector , the small bubbles are loaded with the hydrophobic mineral particles floating up to the upper part of the flotation machine to form a layer of foaming desert layer, which is then scraped off by the scraping plate. Hydrophilic or coarser ore does not float with the bubbles and sinks to the bottom. The middle tank of the side wall of the flotation machine flows through the gate to the next flotation machine.

In order to achieve the self-flow of pulp and foam. Usually the pulp surface of a series of flotation machines is on a horizontal surface. In order to achieve local adjustment of each process (such as rough selection, selection, sweeping), the gates of each process are provided with gates. The correct adjustment of the so-called slurry surface refers to adjusting the pulp surface of the flotation machine while minimizing the impact on the liquid level of the adjacent flotation machine due to the adjustment of the slurry surface of the machine. The adjustment of the flotation machine is to create a foam layer of a certain thickness without making the pulp surface too low.

The foam layer does not have a certain thickness. First, the flotation is unstable. Second, the foam grade is not high. The foam layer is too thick, which tends to make the pulp surface too low, which will reduce the flotation time and increase the burden on the next flotation machine. Adjusting the machine will adjust the next flotation machine, or the flotation machine for the next job. Because the liquid level of the machine is adjusted (ie, the small gate is closed), the slurry of the machine is less flowing out, and the liquid level of the next flotation machine is lowered, so it must be raised (ie, the small gate is closed), and vice versa. In addition to a few cases, the liquid level should be adjusted slightly (ie, one or two turns of the rotating gate) for a while, if one or two more moves. It is not necessary to rotate multiple turns at a time, because the same flotation machine has to rotate the same number of turns until the last flotation machine. Once the overflow is stabilized, the flotation machine has to be adjusted back, which makes the liquid level fluctuation of the flotation machine too large. Caused the decline of flotation indicators. Adjusting the flotation machine should look more and less, and good flotation workers usually make minor adjustments when they take over. After that, even a class does not move, and the indicators are still very good.

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