Method for processing the rock mass of heavy metal fields

摘要

The invention relates to processing the rock mass of placer accumulations, ore and technogenic fields for extracting heavy metals including fine and thin metals, for example gold and silver. The inventive method consists in removing dead rock particles whose size greater than the maximum size of extractable metal particles from an initial rock mass by using any sizing device, recalibrating the thus processed rock mass on a hydraulic screen in such a way that the reprocessed rock mass is removed from the screen in the form of undersize and oversize products and embodied in the form of hydraulic mixtures. The undersize product is processed by a hydro-gravitational classification method in an inclined pulp line and which is associated with the removal of an initial concentrate from said pulp line through a bottom splitter and tails in the form of hydraulic mixtures. The initial concentrate is exposed to a control calibration on the hydraulic screen associated with the removal of the undersize and oversize products in the form of hydraulic mixtures. The undersize product removed from the hydraulic screen is processed by the hydro-gravitational classification method in an inclined pulp line which is associated with the removal of the initial concentrate from said pulp line through a bottom splitter and the tails in the form of hydraulic mixtures. The secondary concentrate removed from the pulp line is processed with the aid of a centrifugal concentrator and the thus obtained dressed sandstone is additionally treated by means of magnetic and magnet-liquid separators.