METHOD OF DRESSING AND PROCESSING IRON ORE Russian patent published in 2016 - IPC B03B7/00 B03C1/00 

FIELD: mining.

SUBSTANCE: invention relates to dressing and processing of iron ore and can be used in mining and metallurgical industry. Method of dressing and processing of iron ores involves ore crushing, magnetic separation. Initial ore is crushed and subjected to low-intensity magnetic separation to produce strongly- and weakly magnetic products. Weakly magnetic product is fed for superfine milling with subsequent high gradient magnetic separation, after which non-magnetic and magnetic fractions are obtained. Magnetic fraction is thickened with addition of a flocculant and an enzyme, simultaneously in process of thickening, strongly magnetic product of low-intensity magnetic separation is fed. Then thickened product is filtered on a filter press. Obtained filtration cake is subjected to screening I. Oversize product I is fed for drying I, undersize product I is fed for briquetting. Dried product is delivered for screening II, oversize product II of which is finished. Undersize product II is directed for briquetting, raw briquettes are dried II and dry briquettes are directed for screening III, oversize product III of which is finished, undersize product III is returned for briquetting. Drying I is carried out at temperature from 1,000 to 1,500 °C.

EFFECT: higher quality of concentrate with simplification of its production.

1 cl, 1 dwg