METHOD OF FLOTATION OF HEMATITE-BEARING IRON ORES AND PRODUCTS Russian patent published in 2013 - IPC B03D1/02 

FIELD: process engineering.

SUBSTANCE: invention relates to concentration of minerals and can be used for flotation separation of iron oxides (hematite, martite, magnetite) from finely disseminated iron ore. Proposed method comprises fine desludging of ore and flotation of minerals using organophosphorous compounds of the below general formula as collector: [RO(C₂H₄O)_m]₂P(O)OM, where R is alkyl C₄-₂₀, alkyl (C₈.₁₀)phenyl; M-H, K, HN(CH₂CH₂OH)₃; m=4-12 with pre-flotation of impurities. Separation of fine slurries (grain size of 0.020 mm and finer) is carried out in long-cone hydraulic cyclones. Flotation of admixtures of carbonate, phosphate and iron-bearing silicates is executed at pH 8-9 created by liquid glass while that of aforesaid metal oxides is performed at pH 5-6 created by sulfuric acid.

EFFECT: higher efficiency.

6 cl, 1 dwg, 7 tbl, 3 ex