Estimate of Collecting Force of Flotation Agent
S. A. KONDRAT’EV1, N. P. MOSHKIN2
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
2Lavrentiev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrentieva 15, Novosibirsk, 630090 Russia
Keywords: flotation, flotation activity, surface tension, liquid film, lubrication theory equations, physical adsorption
Abstract
The authors compare collecting activity of carboxylic acids and surface pressures of their film on water surface. It is found that these parameters correlate, and the surface pressure of the films depends on the length, saturation and branching of hydraulic radical and the availability of substituents. The problem on liquid removal from the film between air bubble and mineral particle is solved numerically. It is shown that the bulk force on the liquid in the film is conditioned by the surface pressure of molecules. The force of a flotation agent is defined as the force of the agent on the liquid in the film. The volumetric liquid flow from the film is related with the surface tension of agent forms active at the particle–bubble interface. The authors suggest the method of estimating collecting activity of physically attached agents by the value of force the agent exerts on liquid in the film.
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