Collectability of Physically Adsorbed Xanthate Ion-Dixanthogen Associates
S. A. KONDRAT’EV, E. A. BURDAKOVA, I. A. KONOVALOV
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: флотация, флотационная активность реагента, эмульсия диксантогенида, поверхностное давление, прослойка жидкости, физическая форма сорбции, селективность, аlotation, flotation activity, dixanthogen emulsion, surface pressure, liquid film, physical adsorption, selectivity
Abstract
Under discussion is collectability of ethyl and butyl xanthate species resulted from non-stoichiometric interaction with oxidizer. It is visually proved that solution contains fine micro-drops stabilized by negative charge. The size and ζ-potential of micro-drops are determined together with the spreading velocity of emulsion over water surface. The mentioned velocity is higher than the spreading velocity of products of non-stoichiometric interaction between xanthate and heavy metal salt. The products of interaction between xanthates and oxidizers, at the moment of rupture of water film between mineral particle and air bubble, can detach from particle surface and attach to air-water interface (desorbable species DS). Spreading of a DS over the interface forces water out of the film. The forces applied to liquid in the film from the side of DS of ethyl and butyl xanthates are evaluated. The volume-flow rate of water from the film is related with the surface pressure of reagent species active at the air-water interface. The surface pressure of dixanthogen-xanthate emulsion is evaluated as a function on initial concentration of xanthate. Collectability of a reagent depends on the surface tension of solution of its DS and is governed by the structure of hydrocarbon fragment of the agent.
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