2017517&ensp·&enspFlotation of coppermolybdenum sulphide ores in seawater entails critical challenges such as selective recovery of molybdenite, effective pyrite depression, and
A Review of the Flotation of Copper Minerals PDF Download . Jul 21, 2017 The depletion of high grade ores, increased demand for metals and allowed various processing plants to treat lowgrade ores at almost .. collector, depressants increase the selectivity of flotation by .
2017815&ensp·&enspdepression strategies improve recovery and grade of copper, gold recovery is very often affected due to its fineinclusions (~13 µm) in pyrite and nonsulphide gangue minerals .
20151014&ensp·&ensp： Ž . Int. J. Miner. Process. 60 2000 263–276 The flotation separation of pyrite from arsenopyrite using hexyl thioethylamine
201661&ensp·&enspThe depression of pyrite flotation is normally difficult especially when pyrite is activated by copper ions. In this study, different biopolymers, modified from lignosulfonate, were examined to
Marmatite depression in galena flotation zinc sulphate and potassium metabisulphite in the flotation of galena and marmatite in the Broken Hill orebody. Marmatite was depressed under alkaline conditions alone, however the addition of the two depressants, either individually or combined, resulted in the greatest selectivity.
ABSTRACT A study of pyrite depression by reducing agents with potassium ethylxanthate as collector indies that pyrite may be depressed effectively in the flotation of both lead and copper sulfide ores without the use of poisonous cyanide salts.
copperpyritic ores flotation cyanides are not used, R.S., (1976): The chemistry of pyrite flotation and depression, In Depression of pyrite mineral with Online consultation The
2012104&ensp·&enspThis is the most commonly used method in the treatment of copperleadzinc ores, c) bulk flotation of copperleadzinc minerals followed by a selective flotation of copper, lead and zinc from the bulk concentrate. for the depression of pyrite. Sphalerite was later activated by CuSO 4 addition. In the
2017731&ensp·&enspPyrite has a significant effect on the copper flotation of com plex ores due to its devastating role in the quality of the product and the efficiency of the process.
197565&ensp·&enspComplex sulfide ores are concentrated mainly through flotation. Sulfide minerals are semiconductors, and pyrite is the major gangue mineral associated with these ores.
The depression of pyrite flotation is normally difficult especially when pyrite is activated by copper ions. In this study, different biopolymers, modified from lignosulfonate, were examined to depress the flotation of copperactivated pyrite.
2017421&ensp·&enspIntroduction. Pyrite has a significant effect on the copper flotation of complex ores due to its devastating role in the quality of the product and the efficiency of the process.
The fundamental ﬁndings (DETA depression effect) can be ap plied to pyrite depression in pyritic copper–gold ore ﬂotation and, in particular, in the postregrind depression of pyrite for gold recovery.
20141218&ensp·&enspDepression of pyrite in porphyry copper flotation Limited depression of pyrite with lime Flotation tests on plant rougher con (60% Cp, 18% Py) (Ore 1) • For ores containing highly floatable pyrite, the use of more selective collectors (e.g. thionocarbamates ) may be preferable
2015921&ensp·&enspThe flotation results suggest that a low dosage of DMSA has a strong depression effect on chalcopyrite in the pH range between 4 and 12. At pH 6, the recoveries of molybdenum are up to 85%, 75%, and 80% while those of chalcopyrite are
Iron Ore Concentrate Price. depression of pyrite in the flotation of copper ores offers 347 iron ore concentrate price products. About 60% of these are .
2017118&ensp·&ensppyrite ores with an elevated pyrite head assay was sought in this work. After characterizing the ore, the objective was to apply bulk rougher flotation of both the copper minerals and pyrite for the
The basic improvement of the process of this invention comprises the addition of sulfite to the flotation pulp to depress flotation of pyrite thereby causing a substantial portion of the pyrite to be removed from the cell in the liquor phase and from the coal in the froth.
The depression of pyrite flotation by cyanide may result from one or more of the following mechanisms: (1) Cyanide may depress pyrite flotation by replacing xanthate ions on pyrite surface, similar to hydroxyl ions (Wark and Cox, 1934, Prestidge et al., 1993).
2012314&ensp·&enspINTERACTION OF DEXTRIN AND GUAR GUM WITH PYRITE 83 The ground sample was then dry screened through 150, 75, and 37„m BSS sieves and stored in plastic containers.The 㼉„m size fraction was used for the electrokinetic and adsorption studies, while the (𧕾C75) „m fraction was used for the ﬂotation tests.
When such ores are concentrated by froth flotation the normal tendency is for the pyrite to report in the copper concentrate. per ton of original feed of sulfhydryl collector already added during rougher flotation and a dispersant is added during conditioning of the thus produced pulp.
Copper ores The main copper sulphide minerals are chalcopyrite (CuFeS2) chalcocite (Cu2S), covellite (CuS), bornite (Cu5FeS4), tetrahedrite ((Cu,Fe)12Sb4S13) and enargite (Cu3AsS4). The largest source of copper is from porphyry ore deposits in which one or a combination of
An improved flotation test method and pyrite depression by an . Flotation of coppermolybdenum sulphide ores in seawater entails critical . It is essential that laboratory flotation tests aimed at solving these problems give . cell significantly improved the reproducibility of the flotation test results, due to . well as to evaluate the possibility of depressing pyrite after molybdenite
Abstract. This study explores the flotation behavior of chalcopyrite in the presence of different concentrations of sodium sulfide (Na 2 SܯH 2 O) at pH 12 under controlled potential conditions. It was observed that the flotation of chalcopyrite is not depressed completely when the pulp potential is low, even at high concentrations of sodium sulfide, i.e., 10 −1 –10 −2 mol/L.
2018924&ensp·&enspThe sharp increase in pyrite flotation around neutral Eh values was associated with high copper and xanthate adsorption while the decreased flotation at higher Eh values was caused by the formation of ferric hydroxide at the pyrite surface which in turn reduced copper adsorption but also reduced hydrophobicity.
This article introduces the present appliion of pyrite flotation depressant reagent in the world.It also expounds the development situation and tendency of producing and
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Pyrite (FeS2) is one mineral that responds to copper method for processing ores it is deﬁned as ''the selective separa activation and can be ﬂoated together with sphalerite (Wills and tion of commercial gangue ores through interactions with microor NapierMunn, 2006).
1998128&ensp·&enspThe present invention relates to a process for separating pyrite from sulfide ores and coal during flotation separation which comprises the depression of pyrite with from about 0.125 to 1.250 pounds per ton of 2S thironiumethane sulfonate (IESA) as a pyrite depressant.
2018324&ensp·&enspFlotation of copper or zinc sulphides by depression of the iron sulphides in selective flotation or in separation of bulk copperpyrite or zincpyrite concentrates is realized
201851&ensp·&ensp14.00 Selective depression of pyrite using biopolymers in the flotation of copper sulphide minerals Y. Mu, Y. Peng (University of Queensland, Australia) and R.A. Lauten (Pionera, Norway) 14.20 Effects of mono and divalent ions in seawater flotation
The present invention relates to a process for separating pyrite from sulfide ores and coal during flotation separation which comprises the depression of pyrite with from about 0.125 to 1.250 pounds per ton of 2S thironiumethane sulfonate (IESA) as a pyrite depressant. The aforementioned depressant is surprisingly effective in pyrite removal, being substantially independent of the pH values