FIELD: physics; concentration of minerals (reduction of technological losses due to entrapping of fine-grained elements).
SUBSTANCE: proposed method includes disintegration of primary pulp by means of sieves according to class 40 mm inside drum and according to class 7-8 mm at inlet of main lock; automatic mixing of primary pulp and its natural degassing are performed at main lock outlet; secondary pulp is subjected to artificial aeration with air bubbles at inlet of additional lock by means of compressor and disperser; secondary pulp is also subjected to washing with circulating water directed from main water conduit over additional water conduit to several sprayers mounted above additional lock; fine metal particles possessing magnetic properties are entrapped in additional lock at action of electromagnetic waves at frequency of 15-20 kHz which are directed towards moving secondary pulp; for acting on secondary pulp, use is made of two piston-type hydroacoustic transducers strictly oriented towards each other; structure of circulating water used for washing the rock, as well as secondary pulp in main and additional water conduits is changed by mounting several inserts in main water conduit; inserts are made from tubes at section varying in length: from maximum at the beginning of each insert to 1/4 of diameter at the end of each insert; one of inserts is mounted immediately before point of connection of additional water conduit to main water conduit, as well as due to forming non-directive radiation of hydroacoustic signals of ultrasonic range of frequencies F2 by means of cylindrical hydroacoustic transducers of ultrasonic range of frequencies which is mounted at outlet of main water conduits forming non-directive radiation of hydroacoustic signals of ultrasonic frequency range F3 close to resonance frequency F0 of air bubbles used for aeration of secondary pulp by means of several (according to number of sprayers) spherical hydroacoustic transducers of ultrasonic range of frequencies mounted under sprayers of additional lock; mounted in circulating water settler is cylindrical hydroacoustic transducer for additional clarification of circulating water by forming non-directive radiation of hydroacoustic signals of low frequency range F4.
EFFECT: enhanced efficiency of entrapping fine metal (gold, platinum) including those possessing magnetic properties; rational nature management; enhanced ecological safety.
9 dwg, 3 tbl, 1 ex
