Abstract
The calculation of the energy possibility of the transfer of spherical bubble A into adhered bubble M or the A → M transition (AMT) shows how large the influence of the capillary pressure (Pc) on the results of calculation is and how, as bubbles A and M diminish and Pc in them increases, the range of the possible variation of PcM in bubble M abruptly narrows. The influence of PcM on the energy barrier on the path to the adherence of the bubble to a hydrophilic surface drops almost to zero, but the preference to the adherence of the bubbles to a hydrophobic surface is retained, although the difference noticeably decreases compared with large bubbles. The data of the practice of the first processes of froth flotation by microbubbles are the confirming experimental base of the results of this precision calculation. A decrease in wetting angle θM to 0.02° and the beginning increase in the spreading coefficient of the adhered bubble over the substrate particle apparently also promotes the adherence process in practice.
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