METHOD FOR PRODUCING CHROMITE CONCENTRATES FROM LEAN DISSEMINATED CHROME IRON BEARING ORES Russian patent published in 2003 - IPC

FIELD: concentration of chrome iron bearing ore. SUBSTANCE: method involves providing concentration in magnetic field and gravitational concentration; before carrying out concentration process, subjecting ore to crushing and disintegration; providing concentration initially in low-power magnetic field accompanied with separation of highly magnetic ore minerals, with following concentration in highly magnetic field; cleaning surfaces of low magnetic ore chromospinelides and exposing to highly magnetic field; separating clayey fractions of ore ultramafites from sand fraction, such as silicates and quartz, by centrifugal forces. Method allows deposits of disseminated and lean disseminated ore deposits to be put into service and chromite raw material deficiency to be substantially reduced. EFFECT: increased efficiency and provision for obtaining low cost commercial product. 1 dwg