Collecting Properties of Diisobutyl Dithiophosphinate in Sulfide Mineral Flotation from Sulfide Ore
V. A. IGNATKINA1, V. A. BOCHAROV2, F. G. D’YACHKOV1
1National University of Science and Technology (MISIS), Leninskii pr. 4, Moscow, 119049 Russia
2Moscow State Mining University, Leninskii pr. 6, Moscow 119991 Russia
Keywords: flotation, pyrite, chalcopyrite, sphalerite, pyrrhotine, aerofin, dithiophosphates, xanthates, adsorption rate constants, surface compounds
Abstract
The authors experimentally compared collecting properties of diisobutyl dithiophosphinate (DDP), butyl and isobutyl xanthate, and diisobutyl and dibutyl dithiophosphate relative to pyrite, chalcopyrite and other sulfides. It was found that pyrite adsorption grew in nonfrothing flotation with all the listed collecting agents. The nonfrothing pyrite flotation by DDP showed higher rates of adsorption and flotation as against butyl xanthate. The ratio of DDP and butyl xanthate flotation rate constants was 1.19, which agreed with the ratio of the adsorption rate constants of 1.18 in nonfrothing flotation. The low selectivity of dithiophosphinates toward sulfide ores is explained.
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