IRON-ORE RAW MATERIAL BENEFICATION METHOD Russian patent published in 2015 - IPC B03B7/00 

FIELD: mining.

SUBSTANCE: invention relates to mining industry and namely it can be used for benefication of iron-ore technogenic mineral deposits. A method involves hydraulic treatment of raw material with formation of pulp with the specified ratio of solid and liquid phases, its disintegration, pulp screening, supply of the oversized product to a dump and the undersized product to multistage sorting. Prior to multistage sorting, the undersized product is supplied to deslurrying and particles of class -0.02 mm are separated; sands of class +0.02 mm are supplied to a hydrocyclone, where sands with particles of class +0.10 mm are separated and supplied to a tailing dump. Drain of class -0.10 mm as the beneficiated product is supplied to the first hydraulic benefication stage, where benefication tailings, the beneficiated concentrate and the intermediate product is obtained, which is supplied as circulating load to a screw separator of the first hydraulic benefication stage. Tailings of screw separators of the first benefication stage are supplied to the first benefication inlet in a three-product screw gate, from where the obtained intermediate product and benefication tailings are supplied to the tailings dump. The concentrate is supplied to the second benefication inlet in a three-product screw gate, where it is subject to additional benefication with formation of tailings and the intermediate product, which are directed to the tailings dump. The concentrate is supplied for thickening and dehydration. The concentrate obtained at the first hydraulic benefication stage is supplied to the second benefication stage in three-product screw separators, and thus, benefication tailings and the intermediate product is formed. The iron-ore concentrate is supplied for thickening and dehydration.

EFFECT: improving extraction of an iron-containing useful component from tailings of a benefication process.

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