METHOD FOR CONCENTRATION OF BLACK IRON ORES Russian patent published in 1996 - IPC

FIELD: mineral concentration; technology of processing useful black iron ores. SUBSTANCE: two or more process sections are combined through intersection pulp dividers through which large fraction above 50 mcm from units of classification of one section is transferred to combined section where the large fraction is combined with similar material of this section and supplied of the final grinding stage. To reduce the volumes of solid material coming for final grinding, separated from intermediate product in desliming is large lean concretion fractions by producing intensive ascending flow of wash water. Check magnetic system installed on the deslimer overflow trough is used for additional magnetic separation of overflow with discharge of lean concretion fractions into tailings and return of rich mineral concretions into deslimer sands. EFFECT: higher efficiency. 2 cl, 1 dwg