METHOD FOR BENEFICIATION OF OXIDISED FERRUGINOUS QUARTZITES Russian patent published in 2016 - IPC B03B7/00 B03D1/02 

FIELD: chemistry.

SUBSTANCE: invention relates to beneficiation of minerals by reverse cationic flotation and can be used in beneficiation of oxidised ferruginous quartzites. Method for beneficiation of ferruginous quartzites comprises grinding ore, reverse cationic flotation of silicate-containing minerals by a stage process in presence of a modifier, operation for attrition of floatation tail of first floatation stage in front of second main floatation stage. Foam products of first and second flotation stages are separately subjected to attrition in attrition system in presence of modifier and directed for recleaning silicon dioxide. Flotation of silicate-containing minerals during beneficiation of oxidised ferruginous quartzites is carried out at pulp density less than 32 % of solid. Depressant for iron-containing minerals used is a non-ionic polymer. Cationic collector for silicate-containing minerals used is a reagent having high sorption capacity on solid phase, based on diether amin. Foaming agent for silicate-containing minerals used is a reagent based on polyalkylene glycol.

EFFECT: technical result is obtaining standard iron concentrate and increased extraction of same metal in concentration of oxidised ferruginous quartzites.

1 cl, 1 dwg, 1 tbl, 1 ex