ORE CONCENTRATION PROCESSES AND COMPOSITION FOR ITS EMBODIMENT Russian patent published in 2002 - IPC

FIELD: ore dressing. SUBSTANCE: invention relates to sulfide ores and ores containing precious metals concentrated by froth flotation. Process involves: formation of water suspension containing ground ore and composition consisting of dialkylaryldisulfonic acid and collector and collection of enriched minerals by treating the suspension under froth flotation conditions. Collector is selected from group including dialkyl dithiophosphinates, diaryl dithiophosphinates, dialkyl monothiophosphinates, diaryl monothiophosphinates, dialkyl thioncarbamates, allylalkyl thioncarbamates, hydrocarboxycarbonylthioncarbamates, hydrocarboxycarbonylthioureas, dialkyl dithiophosphates, diaryl dithiophosphates, dialkyl monothiophosphates, diaryl monothiophosphates, mercaptobenzothiazoles, alkyl xanthogenates, alkyl xanthogenate esters, alkylxanthogene formats, xanthogenates, alkyl dithiocarbamates, dialkyl sulfides, alkyl trithiocarbonates, dialkyl trithiocarbonates, alkylmercaptans, thocarbanylides, dialkyl disulfides, 1,3- oxathiolan-2-thions, O- and S-(2-mercaptoalkyl)mono- or dihydrocarbylcarbamodithiates, substituted mercaptobenzothiazoles, mercaptobenzoisoxazoles, substituted mercaptobenzoisoxazoles, O,O'-, O,S'- and S,S'-dithioalkylene-bis-(mono- or dyhydrocarbyl)carbamatothiates and their mixtures and salts, diisobutyl dithiophosphates and diisobutyl monothiophosphates. Dialkylarenedisulfonic acid is selected from group including dialkylnaphthalenedisulfonic acid, dialkylbenzenedisulfonic acid, dialkyldiphenyloxidedisulfonic acid, and dialkyldiphenyldisulfonic acid. Weight ratio of dialkylarenedisulfonic acid to collector lies within a range 5:95-95:5. Composition contains less than 20% of dialkylarenemonosulfonic acid based on the weight of dialkylarenedisulfonic acid. The latter contains at least 14 or 16 carbon atoms. Composition can also contain another collector, differing from dialkylarenedisulfonic acid or from the first collector, in amounts effective to provide improved concentration of ore. EFFECT: increased concentration efficiency. 6 cl, 7 tbl, 2 ex