High flotation activity of collector when additional hydrophilic group is implemented in its structure of hydrocarbon fragment does not have explanation in thermodynamic description of the elementary act of flotation. An assumption is made that the presence of hydrophilic group promotes connection establishing of energetic links between hydrocarbon fragment of reagent and water molecules. As a result, speed of spreading of physical form of reagent sorption on “gas-liquid” interface, when flotation complex forms, increases. Connection between flotation activity of collector, its structure and composition and power of surface flow of its physically sorbed forms is established.
Improvement of a reagent mode is one of the common affordable methods of stimulating flotation efficiency. The present scientific knowledge proves the promising nature of combining chemical agents. The combinations of flotation agents are advantageous for the increased recovery, higher separation quality, reduced consumption of reagents, etc. In this regard, it is of the current concern to elaborate the methods to select reagents and to determine their ratios for composing efficient combinations. This paper, using the earlier proposed physisorption mechanism which explains correlation of flotation activity and surface tension, suggests combining chemical agents with regard to an interaction parameter. This can make it possible to mixture components at such ratio that ensures the synergistic effect at the gas-liquid interface.
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