Electrical parameters of high-temperature electrical conductivity, frequency characteristics of active electrical resistance and dielectric losses of samples of minerals, rocks, ores as a function of their composition and genesis

Abstract

Relevance is determined by the search and selection of the most information-intensive characteristics and physical properties of minerals and rocks for the reconstruction of genesis conditions, as well as the need for scientifically based criteria for the detection of various minerals, their quality assessment, which is especially important in selective mining and the choice of the optimal ore dressing technology. Research methodology. Для исследования электрических свойств были использованы образцы в форме кубика с ребром 0,02 м. To study the electrical properties, samples in the form of a cube with an edge of 0.02 m were used. The measurements were performed in an open system at atmospheric pressure. The electrical resistance was measured with two-electrode setup every 10 degrees in the temperature range of 20–900 ºC. The heating rate is 0.066 deg/s. Measuring instrument – E6-13 teraohmmeter with dynamic range from 10 to 1014 Ohm and relative measurement error from ±2.5 to 4% at the end of the range. The frequency dispersion of the active resistance and the dielectric loss tangent was studied at room temperature in the range of 0.01–100 kHz. The measuring device is the LCR-819 immitance meter. The technique is described in the instruction manual for the device (LCR-819 immittance meter. Operation manual. M., 2005. 26 p.). Results. Physical, physicochemical, mineralogical and petrographic methods have been used to study samples of some minerals, rocks, ores from different deposits of the Urals. Functional relationships are revealed between the electrical parameters of high-temperature electrical conductivity (activation energy E0 , the so-called electrical resistance coefficient lg R0 ), frequency characteristics of active resistance, dielectric loss tangent of the studied samples of minerals, rocks, ores with their genetic features, mineral composition and quality. The materials presented in the work are the result of many years of research by the author. Conclusions. The given results in combination with other physicochemical parameters can be used as a reliable indicator of the rapid assessment of the studied material.