How to solve these major anomalies in the flotation machine?

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In the mineral processing plant, when the flotation machine is operating, the requirements for the mineral grinding fineness, slurry concentration, chemicals, etc. are relatively strict. Therefore, on-site operators need to regularly check the flotation machine. If the operation status is not timely, it is likely to cause abnormal phenomena of the flotation machine, such as large flotation tailing loss, large foam in the flotation tank, too high a page in the flotation tank, fragile foam layer, local knurling, and decline in the slurry page. , leaking, running rough and other phenomena. Let me analyze this abnormal phenomenon and give appropriate solutions!

1. High flotation tailing loss

This situation may be that the grinding fineness of the materials in the flotation machine does not meet the standard or the flotation chemicals Dosage problems lead to poor performance of the flotation machine. If the grinding fineness cannot reach the target, the grinding fineness should be appropriately increased, and the number of grinding sections can be increased, or the grinding method can be implemented in stages.

If there is a problem with the dosage of flotation reagents, the flotation reagents should be tested and the dosage and indicators of flotation reagents should be re-determined. For example, in a copper oxide cobalt mine in Congo, the main copper-containing mineral is malachite, and the cobalt mineral is hydrocobaltite. In order to improve the flotation effect, after experiments, a 1:1 mixture of sodium hydrosulfide and ammonium sulfide was used to improve the flotation effect. flotation effect.

2. The foam in the flotation tank is large

When there is large foam in the flotation tank and the surface is reflective, the possible reason is that too much flotation agent is added. At this time, the operator should appropriately adjust the dosage of flotation reagents and observe whether the flotation foam condition has improved.

3. The liquid level of the flotation tank is too high (single)

The reason for the high liquid level of the flotation tank (single) may be that the suction pipe is blocked. If the phenomenon occurs, the operator needs to stop and clean the suction pipe.

4. The scraped foam contains a large amount of slurry, and the foam layer is thin and fragile.

There are four possible reasons for this situation. One is that the overflow concentration is too thin; The first is that the position of the liquid level regulating plate is too high, the third is that the overflow concentration of the slurry is too concentrated, which will also lead to coarsening and severe sand settling, and the fourth is that the amount of inhibitors and adjusters is too large, resulting in the inability to produce an appropriate amount of foam. When this happens, the operator should first observe the situation, control the concentration and fineness of the slurry, and also pay attention to controlling the dosage of adjusters and inhibitors.

5. Partial rutting on the liquid level

The rutting phenomenon on the liquid level of the tank indicates that the slurry foam layer is unstable. It is possible that the cover plate is installed unevenly, resulting in uneven gaps, with one side being large. If one side is small and the side with a large gap will produce knurling. It is also possible that the stator has fallen off, causing the incomplete slurry to flow unbalanced at the bottom. The last possibility is a loose pipe joint. These three situations are all caused by the failure of the flotation machine, and the operator needs to notify the machine for repair in time.

6. The drop of the slurry liquid level

The possible reasons for the drop of the slurry liquid level are that the grinding fineness is too coarse, the processing volume is increased, or Insufficient dosage of medication. Operators can solve the problem by adjusting the grinding classification, reducing the amount of ore, or appropriately adjusting the dosage of chemicals.

7. Rising trough

Generally speaking, there are several reasons for this situation: excessive ore feeding volume, excessive aeration volume, and there are leaks in the intermediate box and liquid level regulating plate. Clogging, insufficient slurry suction capacity of the suction tank, too small flushing water pressure, etc. Among these situations, the blockage of the liquid level adjusting plate is the most likely to cause sand settling. The liquid level adjusting plate should be lowered to the lowest level first to clear the blockage. If necessary, open the bottom flow valve to allow the slurry to circulate, and check the aeration amount and acid content. Whether the pipeline is blocked, the ore feed volume and overflow concentration should be ascertained, the reasons should be found out in time, and the ore feed volume or other factors should be adjusted in a timely manner according to the reasons.

8. Overflow fineness becomes coarse

When this phenomenon occurs, the operator should stop the mine first, then open the bottom flow valve at the bottom of the tank, and wait for the slurry flow to return to normal. Feed the ore and block the underflow valve. At the same time, attention should be paid to controlling the concentration of the slurry.

The above are several common malfunctions and solutions of ball mills. In the actual mineral processing plant, before purchasing a flotation machine, the model and type of the flotation machine should be determined. It must meet the requirements for mineral processing in order to improve the flotation efficiency and reduce the failure rate of the flotation machine.