subject: The Mineralization Process In Flotation [print this page] Floatation pulp hydrophobic mineral particles during flotation must be an apology attached to the bubble, followed by the bubbles floating. The bubble gradually adheres to mineral particles that this process is called bubbles mineralization. Bubble mineralization in the pulp, in principle, there are two ways: First, the bubble surface precipitation directly on the mineral particles; mineral particles and bubbles collision. The third channel maybe caused by the combination of these two approaches.
Mechanical flotation machine, for example, after the bubble in the process of mineral particles precipitated on the surface: the air into the mechanical flotation machine, and the slurry mixed flow in front of the impeller blade. The impeller rotation leaves toggle pulp and air mixture, trying to be thrown into the impeller around the pulp. By the blocking of the impeller external hydrostatic pressure, must be greater than the hydrostatic pressure of pressure in order to discharge. The impeller in front of the gas pressure and the Ministry of Cardiff dissolved. This dissolved air slurry leaves the rear of another turn from the leaf above or the side, into the external pressure to the lower space had just been to drain away the pulp, because the outside pressure drop, the air is dissolved in the hydrophobic mineral particles surface precipitation.
Mineralized bubble size the flotation apparent one of the characteristics of a direct impact on the flotation effect. Bubble hours, the air dispersion also increased bubble surface area and the opportunity to contact with the mineral particles the flotation can be improved flotation. However, if the bubble is too small l floating speed is also very small, so that the flotation but harmful. So, flotation, air bubbles cannot be too large to small as well, but not too small, otherwise it will affect the flotation index, lower recoveries and concentrate quality. The scene in the production, the flotation work empirically adjusted to select the appropriate bubble size to be satisfied with the mineralized foam. In different ore flotation operations, the size of the foam bubbles can also be the same. In sulfide ore flotation, the diameter is 8 to more than 10cm bubble to see the bigger bubble with a diameter of 3 ~ 5cm bubbles can be seen as bubbles, while the diameter of 1 to 2cm below the bubble can be seen as vesicles .
Bubble size and the degree of mineralization of the bubble. Bubble size when the bubble mineralization medium rough constituency and selected areas is common in the bubble; bubble mineralization is poor, it is easy to mergers and the National Cheng Kung University bubble; hinder the mineralization of bubbles, bubble mineralization excessive mergers, the formation of abnormal vesicles; bubble mineralization poor vesicles constantly mergers to form large bubbles, but it cannot withstand the damaging factors of the slurry surface fluctuations, and burst, so the scavenger tail common vesicles.
The flotation reagent is a major factor for adjustment of the foam bubble size. Under normal circumstances, the greater the amount of foaming agent, the smaller the bubble is; the greater the lime dosage, the greater the bubble is; inhibitor dosage the greater the smaller the bubbles are.
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