METHOD OF EVALUATION OF GOLD CONTENT IN TESTED MATERIAL Russian patent published in 1997 - IPC

FIELD: mining industry, particular, detection of conducting particles in loose materials, for instance, particles of gold. SUBSTANCE: the offered method includes introduction of sensitive element in contact with tested material and mutually moved relative to each other. Electrical conductance of material particles is measured and particles possessing electrical conductance higher than the other material are registered. In so doing, at the moment of measurement of electrical conductance, contact pressure of particles onto sensitive element is measured, and measurement of electrical conductance is carried out at constant contact pressure. In each selected point, at least, two measurements are made at different contact pressure. EFFECT: higher efficiency. 1 dwg