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A method of depressing copper sulfides and iron sulfides in a molybdenite floatation recovery process uses alkaline or alkaline earth potysulftdes at high concentrate pH. The method of enriching molybdenite content from a slurry having molybdenite and at least one of iron sulfides and copper sulfides can include the steps of adding an effective amount of a depressing reagent selected from one ...
contact usThe flotation flowsheet involves the bulk flotation of copper and molybdenum minerals followed by depression of copper minerals and the flotation, with multi stage cleaning, of molybdenum.The plant is current treating ore at a rate of 20 metric tonnes per annum and it is planned to increase throughput through the installation of an additional ...
contact ushence depression of the gangue minerals in the flotation of sulphides from an artificial pyrite-quartz mixture. Flotation . of . any given mineral is intimately bound up with the degree of dispersion or flocculation of that mineral in the pulp and it may be aaid(l4) that flotation is not (14) Wark, I.i. Principles of Flotation.
contact us2.3 Flotation tests using Floatan TS us Molybdenite depressant Floatan T5 has been formulated by its manufacture for pyrile and other gangue minerais depression in copper sulfides flotation. The effect of this extract was analyzed, also making modifications on work conditions. With these changes, ii
contact us· In this study, chitosan polymer was tested as a potential selective green depressant of pyrite in the bulk flotation of galena (PbS) and chalcopyrite (CuFeS 2 ) from sphalerite (ZnS) and pyrite (FeS 2 ) using sodium isopropyl xanthate as a collector and 4-methyl-2-pentanol (MIBC) as a frother. Flotation tests were carried out in a D12-Denver flotation laboratory cell in the presence and ...
contact usused for the separation of copper/lead minerals [2,3], such as copper depression with lead flotation and lead depression with copper flotation. Some reagents such as sodium cyanide for the depression of chalcopyrite and sodium dichromate for the depression of galena are employed [4]. Although only small amount of this kind
contact usFlotation of copper sulphides is a traditional technique for processing the sulphide copper. The presence of pyrite in copper concentrates (especially the pyrite particles that are ... depression of pyrite increased due to the increase in oxidation of surface copper. 11 Using sodium glycerine-xanthate (SGX), the floatability of pyrite decreased ...
contact usDOI: 10.3390/MET10091269 Corpus ID: 224919332. A Review of Recent Advances in Depression Techniques for Flotation Separation of Cu–Mo Sulfides in Porphyry Copper Deposits
contact us11.45 Orfom® D8 depression of chalcopyrite during trial runs of Cu-Mo bulk concentrates S. Timbillah, R. LaDouceur, D. Laney, A. Das, and C. A. Young (Montana Technological University, USA) 12.00 Sulphidisation and flotation of oxidised copper sulphides T. Moimane, Y. Huai and Y. Peng (The University of Queensland, Australia)
contact usThe Flotation Process. Until quite recently copper ore had to be hand-picked if the extraction of the metal was to be economical. In fact, in the last century, ores of 4 percent grade were regarded as almost valueless. Today such ores (which would be regarded as relatively rich in copper) are scarce; the great majority of mines contain the ...
contact us· The complete behavior of flotation and depression of copper sulfides and oxides as a function of potential modified by sodium hydrosulfide in certain non-xanthate collector systems was studied using a sulfide ion electrode (SIE). Detailed flotation tests on three diverse copper ores, using different types of collectors, and two Cu–Mo ...
contact usDepression of pyrite in porphyry copper flotation Ian Wark Research Institute Australian Research Council Special Research Centre For Particle and Material Interfaces M. …
contact usflotation of sulphide minerals, for example (i) water quality in general (Levay, et al., 2001), ... depression of copper-activated sphalerite due to magnesium occurs above pH 9 where the hydroxide starts to precipitate (Lascelles and Finch, 2001), cyanide can be used to eliminate copper sulphide
contact usFlotation is conducted at high pH levels often times greater than 11 using lime to ensure good depression of sulphide minerals, particularly iron sulphides and copper. Other depressants used include cyanide and Nokes reagent (thiophosphorous or thioarsenic compounds).
contact usFlotation of copper, organic carbon and mineral components were analyzed and described. 2. Materials and methods For the purpose of conducting the depression tests, a sample of shale-dolomitic copper ore was collected from the Rudna Concentrator Plant of KGHM Polska Miedz S.A. in Poland. Three rougher flotation
contact usCopper "activation", involving the surface adsorption of copper species from solution onto mineral surfaces to activate the surface for hydrophobic collector attachment, is an important step in the flotation and separation of minerals in an ore.
contact us· The more flotation collector you have on, the higher you will need to increase that pH for effective pyrite depression. You also need to insure your pyrite and copper minerals are well liberated for good chemical separation by pH. In froth flotation, depressing pyrite or any metal is impossible if minerals are locked.
contact usThe total rougher copper flotation time was 7.5min. The laboratory flotation testing results are shown in Table 1. Table 1 – Laboratory flotation testing results Samples ... Selective activation or depression of sphalerite can be evaluated by understanding the surface
contact us1989 (English) Doctoral thesis, comprehensive summary (Other academic) Abstract [en] Thermodynamic calculations, electrochemical techniques, flotation and adsorption tests were used to study the physico-chemical principles involved in the flotation, activation and depression of the common ironcontaining sulphide minerals.
contact usflotation selectivity was observed in the rougher concentrate of the galena circuit despite the use of a large amount of sodium cyanide. Batch flotation tests have shown that the use of cyanide alone is not efficient for the depression of sphalerite from the Rosh Pinah ore …
contact usSelective differential flotation of lead, copper, zinc sulphide minerals has been practiced for many years (Cyanamid, 1989); however, separation prob-lems are still encountered. In accordance with de-zincing flotation process, Quast and Hobart (2006) conducted marmatite (ZnFeS) depression in ga-lena flotation by combining two depressants of zinc
contact usCommercial copper production was declared on March 1, 2009, when copper concentrate inventory levels surpassed the 5,000 tonne shipping threshold. Increased zinc levels in the ore body, as it was continuously being mined, prompted the construction of a Cu/Zn separation circuit as extension of the previous flotation circuit.
contact us(gold sulfides) and (b) depression of certain minerals (pyrrhotite and copper in copper–moly separation) [1]. Using nitrogen instead of air in the flotation systems changed the pulp potential and suggested that Na 2 S/NaSH consumption could be reduced. After using nitrogen in the Sarcheshmeh copper complex over 21 months, the consumption of
contact usThis flotation step is conducted at alkaline pH. In the case where galena is floated and the copper minerals are depressed, copper depression can be achieved by using sodium sulphide, hydrosulfite, lime, cyanide, zinc-cyanide and/or ferricyanide complexes. Selection of flotation reagents and frothers is an important, even critical, consideration.
contact us· In flotation tests, depression was achieved using non-toxic reagents and consequently individual copper, lead and zinc concentrates assaying 31.68% Cu, 67.69% Pb, 49.79% Zn were obtained with 72, 80 and 57% metal recoveries, respectively.
contact usAbstract 2,3-disulfanylbutanedioic acid (DMSA) was found to be a selective depressant in the flotation separation of copper– molybdenum sulfides. The 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 15%, 5%, …
contact us· Pyrite depression in the flotation of copper ores is difficult due to the activation of Cu2+ ions on pyrite surface. In this study, the radical chain reaction involving the redox cycling of Cu(I/II) induced by sodium metabisulphite (MBS) was exploited to selectively depress the flotation of copper-activated pyrite at pH 8.0. Electrochemical measurements revealed that the presence of Cu2+ and ...
contact usIn the Cu-Mo separation system, AERO® depressants assist in the depression of copper and iron sulfides at lower doses than traditional depressants such as NaHS and Nokes reagents. Other applications of depressants include the flotation of simple metal sulfide and complex polymetallic bearing ores, where we provide products that depress iron ...
contact usFor refractory oxidised copper ores of Huidong Sichuan province, studing the different depressants on the influence of oxidised copper ores flotation behavior. The results showed that: the depressanting effect of the combination of sodium hexametaphosphate primarily is better. When the dosage of the combination of sodium hexametaphosphate and sodium humate reagent is 300 g/t, ratio is 2:1,the ...
contact usTalcum is a common gangue with which sulphide ores are associated, it has an adverse impact on sulphide ores flotation and product index due to its high natural floatability. In this paper it takes talcum-bearing copper sulphide ores from DongChuan in Yunnan province as experimental samples, and a series of tests on depressing talcum in the copper suphide ore flotation were carried out.
contact usporphyry copper associated with molybdenum in China. Na2S has been used as a copper depressant for decades. According to statistics reports from 2009 to 2010, 45−50 kg/t Na2S was required for the flotation process. Since Na2S can be oxidized easily in pulp, leading to depression effect failure, excessive Na2S is required.
contact usRole of starch and metabisulphite on pure pyrite and pyritic copper ore flotation 43 occurred with 1.7 mg/ dm3, while 21% depression occurred with the same dosages of starch at pH 6.5 where pyrite flotation is expected to be weak at pH 10.
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