METHOD FOR SELECTIVE SAMPLING AND PRELIMINARY CONCENTRATION OF FERROMANGANESE BURRS AND DEVICE FOR ITS REALISATION Russian patent published in 2009 - IPC E21C50/00 

FIELD: mining.

SUBSTANCE: group of inventions is related to underground production of minerals, and may be used in mining industry. Method for selective sampling and preliminary concentration of ferromanganese burrs includes displacement of getting device to the bottom, capturing burrs at the bottom, their transportation with the help of drum to zone of unloading and supply to hopper. Besides underpressure zone is created at drum shell, where ferromanganese burrs are captured, retained and transported to the area of underpressure zone ending, with further unloading to hopper under their gravity force. Device for method realisation comprises above-water floating facility, transporting element, bottom getting device in the form of drum. Getting device is arranged with longitudinal grooves at external surface of drum, having through holes at the ends of grooves. Shell with through cone-shaped holes evenly arranged along their whole surface and oriented with their base outwards is installed on drum. Holes are proportionate to captured concentrate. Drum is installed on side disks displaced relative to end to its centre, and is fixed on support table. Immobile header is rigidly connected to support table, and the header has shape of sector equal to 3/4 of circumference and is oriented symmetrically relative to horizontal axis in direction opposite to motion. Header is installed inside drum, between its end and side disk, and in zone of contact with surface of drum, there is an elastic low-friction coating on header. Support table is installed on vertical hydraulic cylinders mounted on skis. On skis there is also a hopper arranged in the form of truncated cone and electric motor in oil bath with pump connected to header by means of nozzle network.

EFFECT: elimination of direct dependence of efficiency on width of buckets, elimination of dead rock lift, production of nonmagnetic minerals, improvement environmental condition in zone of ferromanganese burrs deposits development.

2 cl, 6 dwg