FIELD: process engineering.
SUBSTANCE: invention relates to mining and can be used for development of natural and man-made high-mud gravel deposits of minerals with increased content of fine gold. Proposed method comprises preliminary washout and classifications of sands, separation of waste rock, processing of material under active hydrodynamic effects, separation in thin-layer flows at screw locks and pressurised fluid transfer between jobs. Deep disintegration of said mineral component to micro level of 1-2 mcm is varied out by converting fluid flow kinetic energy in that of acoustic oscillations at cavitation reactor. High-speed jet is formed at the inlet of the latter by spherical reflection surface of hydrodynamic radiator to create toroidal cavitation zone with the fields of primary hydrodynamic and secondary acoustic cavitations. Cavitation reactor walls making diffuser and confuser of cavitation plates distributed over reactor cylindrical top section in two rows, slitted holes of hydrodynamic radiator, reflection wall and rector bottom hydrodynamic radiator serve to create subsequent high-power hydrodynamic disturbances in the form of compression and rarefaction pulses. Secondary acoustic micro flows with preset mean power volume density are created to ensure pressure gradient to exceed micro particle breaking point.
EFFECT: higher efficiency of disintegration.
4 cl, 4 dwg
