Selective Attachment of Luminophore-Bearing Emulsion to Diamonds-Mechanism Analysis and Mode Selection
V. A. Chanturia1, G. P. Dvoichenkova1,2, V. V. Morozov1,3, O. E. Koval'chuk4, Yu. A. Podkamenny1,2, V. N. Yakovlev5
1Academician Melnikov Institute of Comprehensive Exploitation of Mineral Resources, Russian Academy of Sciences, Moscow, 111020 Russia
2Mirny Polytechnical Institute, Mirny, 678174 Russia
3National University for Science and Technology, Moscow, 117049 Russia
4Research and Geology Service, ALROSA, Mirny, 678170 Russia
5Yakutniproalmaz Institute, ALROSA, Mirny, 678174 Russia
Keywords: Алмаз, минералы, кимберлит, эмульсия, люминофоры, извлечение, люминесценция, сепарация, спектрально-кинетические характеристики, Diamond, minerals, kimberlite, emulsion, luminophore, extraction, luminescence, separation, spectral and kinematic characteristics
Abstract
The authors present an efficient modification method of X-ray fluorescence separation with mineral and organic luminophores used to adjust spectral and kinetic characteristics of anomalously luminescent diamonds. The mechanism of attachment of luminophores at diamonds and hydrophobic minerals is proved, including interaction between the organic component of emulsions and the hydrophobic surface of a treated object and the concentration of insoluble luminophore grains at the organic and water interface. Selective attachment of the luminophore-bearing organic phase of emulsion at the diamond surface is achieved owing to phosphatic dispersing agents. Tri-sodium phosphate and sodium hexametaphosphate added to emulsion reduce attachment of the luminosphore-bearing organic phase at the surface of kimberlite minerals. It is shown that phosphate concentration of 1.0-1.5 g/l modifies and stabilizes spectral and kinematic parameters of kimberlite mineral on the level of initial values. This mode maintains the spectral and kinematic characteristics of anomalously luminescent diamonds at the wanted level to ensure extraction of diamonds to concentrate.
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