FIELD: mining engineering.
SUBSTANCE: method includes feeding hydraulic mixture, separation of mineral hydraulic mixture component into fractions by creating a profile of flow velocities due to installation in an inclined chute with smooth bottom, flow deformations taking into account dilution of hydraulic mixture, change of inclination of inclined chute and granulometric composition of gold, discharge of slurry in benefication working cycle and periodically automated cleaning of heavy fraction from zones with removable and automatically controlled lifting of templates by means of an irrigation system. In the process of the benefication working cycle, the hydrodynamic effects of the resonance type are periodically formed as hydraulic mixture enters the front part of the inclined chute with disintegration system of clay inclusions in the hydraulic flow by reduction of V-shaped profile in the longitudinal direction relative to the plane of inclined chute smooth bottom depending on ratio T:G of hydraulic mixture, the content of clay component in sand, inclination of inclined chute and granulometric composition of gold, as well as flow deformations in the form of stationary dividers. The latter are made on sides of the inclined chute on two sides in front and middle parts of the inclined chute, with removable and automatically controlled lifting between the zones during automated cleaning with templates. The front surfaces of the stationary dividers form angles equal to 30° with their side surfaces, and the side surfaces form with the horizontal axis of the front part of the inclined chute the angles of 15°, providing creation of rarefied area for formation of cavitation effect facilitating destruction of fine mineral particles. The first stationary dividers in the direction of hydraulic mixture movement are mounted by their front portion upwards so that the distance of the apexes of the front edges of the dividers from the chute smooth bottom plane is equal to 0.75 of the height of the hydraulic mixtures flow, and the inclines of their upper surfaces form angles, equal to 20° relative to the chute smooth bottom plane. The following stationary dividers in the direction of slurry movement with their front portion are turned down to a depth forming minimal gap between the apexes of the front edges of the stationary dividers and V-shaped profile of the front part, and the chute smooth bottom plane in its middle part which exceeds the maximum size of pellets of the clay inclusions in hydraulic mixture for further destruction and provision of vortex movement.
EFFECT: increased performance by providing efficiency of disintegration process of hydraulic mixture mineral component of high-clay placers of noble metals with high content of fine fractions of valuable components.
3 dwg
