METHOD FOR COMPLEX ENRICHMENT OF RARE-EARTH METAL ORES Russian patent published in 2017 - IPC C22B34/24 B03B7/00 

FIELD: metallurgy.

SUBSTANCE: invention can be used for complex processing of rare-earth metal ores, mainly tantalum-niobium ores. Method involves classification and gravitational separation of mesh minus, screw separation with subsequent concentration, extraction of scrap and nonmagnetic fractions. Non-magnetic fractions, obtained as a result of low-intensity magnetic separations, are subjected to additional dressing. Additional dressing is carried out by wet high-intensity magnetic separation 1 to produce magnetic, non-magnetic and intermediate fractions with their subsequent gravity dressing. Cleaner tailings are directed to dump. Gravity cleaner concentrates of non-magnetic and intermediate fractions after concentration on a table are combined with previously obtained non-magnetic product of low-intensity magnetic separation concentrate of table.

EFFECT: high efficiency of concentration of ores, high degree of extraction of useful minerals due to improved conditions of their opening at grinding, as well as high environmental safety when using developed concentration process of these types of crude mineral ore.

4 cl, 1 dwg, 4 tbl