METHOD OF OBTAINING OF BULK CONCENTRATE FROM FERRUGINOUS QUARTZITES Russian patent published in 2014 - IPC B03B7/00 B03C1/00 

FIELD: mining.

SUBSTANCE: invention relates to mineral dressing and can be used in mining and iron and steel industry. The method of obtaining of bulk concentrate from ferruginous quartzites comprises the grinding of the source ore, its hydraulic classification with obtaining of overflow and sand products, stadial magnetic separation and gravity dressing of tailings of magnetic separation. Magnetic fraction of the base magnetic separation is subjected to thin classification. Oversize fraction of classification is sent for regrinding and cleaning magnetic separation with returning of the magnetic product for classification. Undersize fraction of the product is subjected to additional dressing with separation of magnetic and nonmagnetic fractions. The magnetic fraction is subjected to magnetic and gravitational separation with separation of magnetite concentrate. Nonmagnetic fraction is aggregated with tailings of the previous stages and sent to screw and hydraulic separation with obtaining of hematite concentrate and dump tailings. The tailings of magnetic and gravitational separation are subjected to desliming with separation of draining in tailings, and sands are returned for regrinding. Heavy fraction of the base stage of screw separation is sent for cleaning screw-shaped separation to dump a lighter fraction to tailings and obtaining of rough hematite concentrate, the operational development which is finished out by hydraulic separation.

EFFECT: increase of separation of ferriferous minerals.

3 cl, 1 dwg