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The effect of flotation mineral processing is poor, which is the problem of operation

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mineral processing

Flotation is a complex mineral processing process. During the operation of the flotation plant, the operation of the flotation machine has an important impact on the flotation effect, which will directly affect the indicators of the flotation products. The scientific operation and operation of the flotation machine Conditioning is critical.

Influence of flotation machine operation factors on flotation mineral processing

The operating factors of the flotation machine mainly include the amount of air filling, the area of the circulation hole, the clearance of the stirring mechanism, the amount of foam scraping and the level of the liquid level, etc. In this paper, we will discuss the influence of the above flotation machine operation factors on the flotation effect.

Adjustment of the air volume of the flotation machine

Due to the particularity of the mineral processing method of flotation, the aeration volume of the flotation machine is very critical in the flotation process, and an appropriate aeration volume is the premise of a good flotation index. Excessive aeration will reduce the selectivity of useful minerals. When the aeration exceeds the limit, the flotation bubbles will even merge to form an air flow, causing the liquid surface to turn, and a stable foam layer cannot be formed, resulting in the loss of useful minerals in the tailings.

Generally, when the concentration of pulp fed into the flotation machine is high and the useful minerals have good buoyancy, the amount of aeration can be appropriately increased to ensure that the flotation machine has a higher processing capacity. When the requirements for the concentrate index are strict, the mineral buoyancy is poor or the concentration of the flotation pulp is low, the amount of aeration can be appropriately reduced. According to the order of different flotation chambers, the air filling volume of each flotation chamber is also different, and it should be ensured that each flotation chamber can form a stable foam layer.

Circulation hole area of flotation machine

In actual production, it is necessary to adjust the circulation hole area according to the quality of flotation products, the processing capacity and type of flotation machine to form a suitable circulation volume. At the same time, it is also necessary to regularly deal with the sundries on the circulation hole to avoid blockage of the circulation hole.

Clearance of stirring mechanism of flotation machine

The radial clearance and axial clearance between the impeller and the stator of the mechanical agitation flotation machine have a significant impact on the performance of the flotation machine. The increase of the two will lead to a decrease in the air filling capacity, slurry suction volume and inflation uniformity coefficient of the flotation machine, and increase the power of the flotation machine. consumption.

Generally, the radial gap of the stirring mechanism of the flotation machine does not exceed 8mm, and the axial gap does not exceed 10mm. When the flotation machine is discharging and overhauling, use a metal or plastic feeler gauge to detect the size of the gap. The detection should be carried out along the circumference of the impeller. Take multiple measurements and take their average.

Flotation machine scraping and liquid level adjustment

Foam scraping is an important process of the flotation machine, which is related to the level of the flotation liquid, and has an important impact on the quality and recovery rate of the flotation concentrate product. If the foam layer cannot be scraped out of the flotation machine in time, it will cause the foam layer to accumulate , so that the useful minerals are lost in the tailings, which not only affects the recovery rate of the concentrate, but also affects the processing capacity of the flotation machine. On the contrary, if a part of the slurry is brought along with the scraping of the foam, the quality of the concentrate will be reduced, so it is very important to adjust the flotation liquid level. It should be noted that when the flotation liquid level is raised, the amount of scraped foam will increase and the foam layer will become thinner. Judgment should be made according to the structure of the flotation machine and process links, and adjustments should be made in time.

In conclusion

The above is the influence of the operation of the flotation machine on the flotation effect. In actual production, according to the different process stages, the operation requirements of the flotation machine are also different. It should be considered comprehensively according to the actual situation and the process production conditions, and the flotation machine should be operated scientifically and rationally to ensure the process indicators and economic benefits. long-term stability.