FIELD: extraction and processing of gravel minerals, applicable for dressing of native metals out of gravel deposits by the method of flushing. SUBSTANCE: pulp is fed to a cylindrical vessel with a flat bottom divided by a cylindrical partition into chambers and having a hole for the central pipe, by means of a hole in the form of a branch pipe for pulp feed, made in the upper third of the ascending current and installed tangentially to the cylindrical generating line. Rotary motion about the reservoir vertical axis is imparted to pulp. An ascending current is produced in the form of a double thread with rotation of branches about the center of their section in different directions by feed of water from three nozzles position near the bottom of the cylindrical reservoir and made in the form of three equally spaced branch pipes in the drain pipe, having the same concavity in the plane of rotation and water feed from above through the drain pipe. Particles are separated according to precipitation rate in the section of the vortex overflow funnel with subsequent falling of them. The appliance for extraction of light fractions has the form of an overflow funnel with a drain to the central pipe, the appliance for drain to the central pipe, the appliance for withdrawal of separated heavy fractions in additional ascending current has the form of a branch pipe in the bottom, where an impulsive ascending- descending motion is produced for forced extraction of separated particles, it is connected to a hermetically sealed collector of coarse slime in the form of an expanded vessel, which has a controlled feed of water from above and a drive flexible diaphragm. EFFECT: enhanced efficiency of dressing. 2 cl, 1 dwg
