26 UDK 622.7 O.I. Ibragimova1 1University of Dodoma (Dodoma, Tanzania), 2 D.R. Aksenova2 V.A. Luganov3 , Associate Professor, ibroi@rocketmail.com , MSc Student, dianka-i@yandex.ru , Full Professor, v_luganov@hotmail.com University of Laval (Quebec, Canada), 3 Noncommercial Joint-Stock Company «Kazakh National Research Technical University named after K.I. Satpaev» (Almaty, Kazakhstan) SYNERGISTIC EFFECT AND BENEFITS OF MIXED COLLECTORS APPLICATION Қиын және кедей кендерді байыту қиын болғандықтан бір жинағыш кешенді кеннен бағалы минералды тиімді түрде бөліп ала алмайды. <...> Вследствие сложности обогащения трудных и бедных руд один собиратель не может эффективно извлечь ценный минерал из комплексной руды. <...> Froth flotation is one of the most widely used processes to recover valuable minerals from the ores. <...> Although tens of millions organic compounds have been synthesized and thousands of them are suggested as collectors, xanthates still continue to dominate sulphide ore flotation due to their effectiveness and industrial availability [1]. <...> However, due to complexity of beneficiation problems associated with refractory and lean ores, the single collector cannot effectively recover the valuable mineral from the complex ore. <...> Therefore the troublesome question for the researchers remains the discovery the synergistic effect of combinations of collectors and development into methods for studying adsorption mechanism both for the evaluation of potentially useful systems and to obtain a better understanding of the underlying theoretical principles. <...> It is known that in flotation practice the mixtures of various collectors often show greater effectiveness than would be expected from their individual characteristics [5]. <...> This phenomenon is a classical example of synergism in flotation, in which the combined effect exceeds the sum of individual partial effects. <...> This idea was further developed and proposed the reliable model that could be used in description of collectors adsorption through strong and weak site theory [6-7]. <...> It has been postulated that the surface of sulfide minerals is not uniform and consists of sites with different activities. <...> The optimum collector combination has to consist of collectors with difference in power and selectivity. <...> A surface must <...>