METHOD FOR BENEFICIATION OF STRONGLY MAGNETIC ORES AND A BENEFICIATION UNIT Russian patent published in 2023 - IPC B03C1/02 B03B7/00 B03B9/00 

FIELD: minerals beneficiation.

SUBSTANCE: invention relates to minerals beneficiation field, in particular to method for beneficiation of strongly magnetic ores, method may be used to improve the quality of isolated finely dispersed ferromagnetic minerals by reducing the mass fraction of quartzite and silicon dioxide. Method for beneficiation of strongly magnetic ores includes performing separation using several magneto-gravity separators (MGS) units in wet separation conditions, for this purpose a suspension with an ore concentrate passes through the first MGS, which operates in a mode of separation of a large ore concentrate from a small by using a weak magnetic field with intensity of 60-70E, a fraction with large strongly magnetic particles falls into the lower branch of the MGS, and the fraction with small strongly magnetic particles moves along the MGS axis upwards to the centre of the working area against the forces of gravity, after which the separated fraction with small particles is sent for subsequent separation to the line consisting of three MPS connected in parallel and operating at a magnetic field strength of 90-95E. The non-magnetic particles go down the drain, and magnetite with smaller particles adheres to the walls of the magnetic circuit, slides down and goes into a collector to collect concentrate with 69.2% of Fe total. The method is performed by means of a unit consisting of four magneto-gravity separators (MGS). Each MGS contains a casing with a device for slurry supply, filtration device, outlet, shutter with a bottom spigot, a device for rinsing water supply, a separation product output device, magnetic system located outside the MGS casing made in the form of inductor consisting of one or more inductive coils with control system. Output of the first MSG designed to separate from the initial suspension of the fraction with small highly magnetic particles is an input for second, third and fourth MSG that are connected in parallel.

EFFECT: invention provides possibility to improve separation process and obtain high quality concentrate.

2 cl, 2 dwg, 5 tbl, 4 ex