METHOD FOR ARRANGING PULP FOR FLOTATION OF MAGNETIC FRACTION FROM CONCENTRATES OF SULPHIDE COPPER-NICKEL ORES CONTAINING FERROMAGNETIC MINERALS OF IRON AND PRECIOUS METALS

摘要

FIELD: mining engineering.;SUBSTANCE: invention refers to the processes of flotation and magnetic enrichment of minerals, particularly to the extraction of copper, nickel and precious metals from magnetic fraction of stored and current mine refuses of impregnated sulphide copper-nickel ores. The method can be used for increasing extraction of precious ferromagnetic components from other types of ores and conversion products. The method comprises screen separation, deslurrying, centrifugal enrichment, flotation, magnetic separation of flotation residue, arranging pulp for magnetic fraction flotation and flotation of magnetic fraction. The pulp for magnetic fraction flotation is arranged in three stages. The first stage comprises mechanical processing of magnetic fraction including feeding sulphydryl collector in proportion to quantity of regrind grain-size class into the mill prior to processing. The second stage consists in pulp demagnetising. The third stage consists in adding multifunctional modifying agent (e.g. soda).;EFFECT: improved flotation efficiency.;1 tbl, 7 ex