Cu NMR method in a local field for investigation of copper ore concentrates

To choose the most efficient method and ore beneficiation flow diagram, it is important to know physical and chemical properties of ore concentrates. The feasibility of application of the [sup.63,65]Cu nuclear magnetic resonance (NMR) method in a local field aimed at studying the properties of copper ore concentrates in the copper-iron-sulfur system is demonstrated. [sup.63,65]Cu NMR spectrum is measured in a local field for a copper concentrate sample and relaxation parameters (times [T.sub.1] and [T.sub.2]) are obtained. The spectrum obtained was used to identify a mineral (chalcopyrite) contained in the concentrate. Based on the experimental data, comparative characteristics of natural chalcopyrite and beneficiated copper concentrate are given. The feasibility of application of the NMR method in a local field to explore mineral deposits is analyzed. Keywords: nuclear magnetic resonance, nuclear quadrupole resonance, chalcopyrite, copper concentrate, physical and chemical properties of ore concentrates.