DEVICE FOR WET GRAVITY CONCENTRATION OF FINE-GRAINED SAND Russian patent published in 2017 - IPC C22B3/02 B03B5/32 

FIELD: machine engineering.

SUBSTANCE: device comprises a housing with units of water supply, initial sand loading, unloading of light fraction in the form of tailings and unloading of heavy fraction in the form of concentrate, it is additionally equipped with inner and outer bowls installed in the housing one inside the other, rigidly connected with each other and made with the possibility of orbital and oscillatory motion, and the unloading unit of intermediate density fraction. The initial sand loading unit consists of an external feed hopper and an internal feed hopper with a branch pipe at the center of the inner bowl, which is made with a perforation in the form of openings. The space between the bowls is filled with an artificial bed. Unloading unit of heavy fraction in the form of concentrate is connected to the bottom outlets of perforated elastic tubes, unloading unit of light fraction in the form of tailings is made with the possibility of faction unloading concentrated in the central and upper parts of the inner bowl, and the unloading unit of intermediate density fraction is made with the possibility of faction unloading with the rise up in space, limited by the outer side of the inner bowl, inner side of the outer bowl and outer surface of the pipes.

EFFECT: increased efficiency of extracting fine-grained minerals low-contrast in density.

3 dwg