METHOD OF FLOTATION CONCENTRATION OF OXIDISED IRON MINERALS 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 concentration of oxidised iron-bearing ores with low magnetic susceptibility, mainly goethite. Method of flotation concentration of oxidised iron minerals includes introduction of modifiers, depressant - non-ionic polymer, collector and foaming agent, reverse cationic flotation with extraction into foam product of minerals of waste rock and iron concentrate in floatation tail. Reverse cationic flotation is performed in two stages. First flotation of calcite is performed, then flotation of silicate-containing minerals from floatation tail of calcine flotation cycle. For flotation calcite, modified collector based on primary amines of fatty acids is used. For flotation of silicate-containing minerals, a combination of primary monoamine and diether amin is used in following ratio of components: (1÷3):(0.1÷1). Prior to recleaning flotation operation of calcite, pulp is heated to temperature not lower than 40 °C.

EFFECT: technical result is obtaining standard iron concentrate and increased extraction of same metal in concentration of ores containing oxidised iron minerals.

1 cl, 1 dwg, 1 tbl, 1 ex