STUDYING OF THE MECHANISM OF EFFECT OF REAGENTS AT FLOATATION ENRICHMENT OF COAL SLIMES
Article is devoted to studying of the mechanism of effect of reagents of various origin in case of flotation of coal slimes. It is shown that efficiency the apolyarnykh of reagents is caused by the hysteresis mechanism of action. Increase in viscosity the apolyarnykh of reagents increases durability of fixing of coal particles on an air bubble. Results of a research of floatation activity of the alcohols which are characterized by manifestation of both a collective, and foam-forming capability caused by structurization of aggregates of water and pushing out of hydrophobic coal particles with the adsorptive layer of alcohols on a water surface are considered. Increase in floatation activity of various classes of hydrocarbons among alkanes – arenas – alkenes is established that is caused by presence of the increased electronic density on π-communications. It is shown that the main mechanism of effect of reagents modifiers consists in increase in efficiency of action of collectors due to change of physical and chemical properties of a surface of coal.