Physical Adsorption Mechanism in Terms of Activation of Sulphide Minerals by Heavy Metal Ions
S. A. Kondrat'ev, T. G. Gavrilova
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630091 Russia
Keywords: Флотация, активация, ионы тяжелых металлов, физическая форма сорбции, гидрофобизация, осадки ксантогената металла, бесколлекторная флотация, полисульфидные формы, Flotation, activation, heavy metal ions, physical adsorption, hydrophobization, metal xanthate precipitates, collectorless flotation, polysulphides
Abstract
Activation of sulphides by heavy metal ions is discussed. A brief analysis of modern ideas on mechanism of activation of sphalerite, pyrite and galena by copper sulfate and lead nitrate is given. It is shown that the current technology insufficiently conforms with the experimental and practical data on activation of minerals. A new mechanism of mineral flotation activation is proposed based on the action of physical adsorption species of collecting agents, which allows explaining suppression of flotation under increased concentrations of activator and flotation of sulphides without collectors. The new mechanism integrates the action of mixed potential, activation of minerals by heavy metal ions and the collectorless flotation into a common theoretical framework.
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