FIELD: metallurgy.
SUBSTANCE: group of inventions relates to concentration of iron ore. System comprises at least one air classification device, a first triboelectric electrostatic belt separator. Air classification device receives and processes the raw particle stream to provide a particle stream in which the finest particles are concentrated, as a result of which at least one output stream with an average particle size that is less than 75 microns is obtained. First separator receives and processes at least one output stream of particles with average particle size of less than 75 microns to obtain a concentrate rich in iron.
EFFECT: providing the possibility of efficient processing of fine and very fine particles of iron ore containing various magnetic minerals using a dry method.
31 cl, 9 dwg, 16 tbl, 5 ex
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