Abstract
In this paper, 4-amino-3-thioxo-3,4-dihydro-1,2,4-triazin-5(2H)-one (ATDT) was synthesized and introduced as a depressant for selective flotation separation of molybdenite from chalcopyrite. Its flotation performance and adsorption mechanism on minerals were first investigated by flotation, UV spectra, zeta potential, Fourier Transform Infrared Spectroscopy (FTIR), and X-ray Photoelectron Spectroscopy Measurements (XPS). The bench scale tests indicated that ATDT exhibited stronger depressing power than chalcopyrite, and the selective index of Mo/Cu improved significantly in the presence of ATDT. The results of the UV spectra, zeta potential and FTIR demonstrated that ATDT chemisorbed on the chalcopyrite surface. The XPS results further confirmed that ATDT might chemisorb onto the chalcopyrite surface through S and N atoms to form five-membered chelate rings and a postulated adsorption mode was presented. For molybdenite, the different measurements agreed well with each other and implied that ATDT might weakly physisorb onto a molybdenite surface.
Highlights
As well known, the recovery of polymetallic sulfide minerals could be realized by adopting a powerful collector, such as xanthate, thiophosphate, or a combination
When molybdenite presents as a primary economical resource, a proper recovery of molybdenite and the associated chalcopyrite could be achieved by the applications of kerosene and pine oil as a collector and frother, respectively [1]
The novel was subjected to selective flotation separation of molybdenite from chalcopyrite
Summary
The recovery of polymetallic sulfide minerals could be realized by adopting a powerful collector, such as xanthate, thiophosphate, or a combination. When molybdenite presents as a primary economical resource, a proper recovery of molybdenite and the associated chalcopyrite could be achieved by the applications of kerosene and pine oil as a collector and frother, respectively [1]. The separation of molybdenite from other unwanted sulfide ore is a challenging task, wherein a proper reagent is needed to depress sulfide minerals during the flotation of molybdenite. The application of these compounds at mining sites unavoidably associates with some unpredictable problems and difficulties, such as the seriously corrosion of pipeline, and the toxic nature of the depressant [4]. Whist keeping an eye on the industrial and environmental protection scenarios, attention should be paid to the development of novel, nontoxic and good selectivity compounds to replace these high dosage, low selectivity, and toxic reagents
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