METHOD OF DRESSING OF IRON ORE Russian patent published in 2013 - IPC B03B7/00 

FIELD: process engineering.

SUBSTANCE: invention relates to mining and can be used for dressing stock of man-made deposits, polygons of industrial wastes and temporary stores formed in operation of dressing plants. Proposed method comprises extraction of initial stock, its classification to form out-of-standard bulk to be directed to dump and standard, that is, concentrate including useful component. Iron ore stock represents stored iron-ore concentration tails and/or stored out-of standard iron ore. Haematite is used as useful component in dressed initial stock. Note here that after extraction of initial stock pulp is made thereof and subjected to sieving. Oversize product with grain size over +1 mm is directed to dump while undersize product is classified in hydrocyclone, its waste of grain size of -0.03 mm is directed to dump while sands of grain size of +0.03 mm is concentrated at the first stage of hydraulic gravity concentration. Formed sands are directed to hydraulic gravity concentration. Wastes are directed to second stage of hydraulic gravity concentration, that is, cleaning, its wastes being directed to dump. Note here that sand as those of first stage of hydraulic gravity concentration in separator are directed to hydraulic gravity concentration by, say, helical separator. Three process flows results at the process termination. first, flow, wastes, is directed to dump. Another flow, an intermediate product containing particles of concentrated heamatite, is directed for reclassification in hydraulic cyclone, while third flow, heamatite concentrate, is directed for thickening and dehydration.

EFFECT: efficient pulp separation for production of high-quality heamatite at low costs and power savings.

7 cl, 2 dwg