Selection of Reagents-Regulators for Enhancing Efficiency in Correction of Spectral-Kinetic Characteristics of Diamonds by Luminophore-Bearing Compositions
V. A. Chanturia, V. V. Morozov, G. P. Dvoichenkova, E. L. Chanturia, A. V. Ivanov
Academician Melnikov Institute of Comprehensive Exploitation of Mineral Resources-IPKON, Russian Academy of Sciences, Moscow, Russia
Keywords: Diamonds, kimberlite, kinetic stability, emuslions of luminophore-bearing modifiers, reagents-regulators of luminiscence, X-ray luminiscence separation, selectivity
Abstract
The authors discuss the influence exerted by reagents-regulators on selective modification of spectral-kinetic characteristics of unrecoverable diamonds with anomalous luminosity to ensure their complete and selective recovery in X-ray luminescence separation. The parameters of kinetic stability are determined in emulsions of luminophore-bearing modifiers, and the reagents-regulators that cause no worsening of attachment of the modifiers at the surface of diamonds are found. It is shown that reagents-regulators of different classes (derivatives of alkyl/aryl phosphonates, aliphatic alcohols, bifunctionally modified derivatives of carboxymethyl cellulose, ionic and non-ionic nitrogen-bearing polymers, short-chain aliphatic amines, complex reagents) substantially decrease attachment of luminophores at the surface of hydrophobic minerals of kimberlite and prevent thereby their recovery to separation concentrate. The influence of reagents-regulators on the spectral-kinetic characteristics of the applied luminophore-bearing modifiers and treated diamonds is determined. The reagents-regulators suitable for the use in the modification technology without subsequent unwanted correction of spectral characteristics of diamonds are selected.
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