Flotation results indicate that 50 ppm (6.8 10⁻⁵ mol/L) free cyanide sufficiently depressed pyrite flotation, while 9.5 10⁻⁴ mol/L lead ions substantially activated pyrite flotation

Sep 11, 2020 Flotation reagents can change the surface properties of minerals, leading to differences in the interaction between mineral particles and affecting the mutual aggregation or dispersion of particles. In this work, we studied the role of activator copper sulfate, collector butyl xanthate and frother terpineol in adjusting the potential energy of pyrite particles from the

The depression of pyrite flotation is normally difficult especially when pyrite is activated by copper ions. In this study, different biopolymers, modified

The effects of carboxyl, sulfonate, hydroxyl or thiourea functional groups attached to the polymers on the flotation recoveries of sphalerite and

Oct 01, 2016 The depression of pyrite flotation by polysaccharides is due to the selective adsorption of polysaccharides polymers on pyrite surface. Bulut et al. (2011) investigated the depression effect of starch on pyrite flotation and found that starch was effective at a low dosage (1.7 mg L −1) and more pronounced at alkaline pH (10) than natural pH

Jun 15, 2020 Mixed sphalerite-pyrite flotation tests. In the flotation cell, 10 g of sphalerite and 10 g of pyrite were conditioned in 400 mL of distilled water for 3 min after adding the following reagents in sequence: 1 kg/t of Na 2 SO 3, 5 ppm of Pb 2+, 20 g/t KAX, and 20 L/L AEROFROTH 76A. 2.2.1.3

FLOTATION CHARACTERISTICS OF ARSENOPYRITE by Morris Joh Aloysiun Vreugds e B.A.Sc. The University of British Columbia 197, 1 M.A.Sc. The University of British Columbia 197, 3 A THESIS SUBMITTED IN PARTIAL FULFILMENT OF THE REQUIREMENT FOSR TH DEGREE E O F DOCTOR OF PHILOSOPHY in THE FACULTY O GRADUATF STUDIEE S

after a possible addition of an activator or ... collectors of the sulfonate type that are currently used in the Chaillac plant. ... liberation appear to be hindering the cleanability of pyrite

Jun 10, 2016 The results have shown that the effective flotation was attributed to the formation of a surface metal hydrous-oleate complex (Sun et al., 1992). Fe 2 +, Al 3 +, Pb 2 +, Mg 2 +, Mn 2 + and Ca 2 + are also shown to function as activators with long chain sulfonate as collector (Fuerstenau et al., 1963)

Download scientific diagram | Flotation recovery of pyrite as a function of pH with respect to the oxidation level in the presence of SBX (SBX dosage: 1 10 −4 mol/L; flotation time: 5 min)

Jan 12, 2018 Flotation tests were carried out to investigate the influence of pyrite on the flotation behavior of sphalerite with CuSO 4 as the activator and butyl xanthate as the collector. The flotation recovery of sphalerite alone, and mixed with different proportions of pyrite, as a function of pH and flotation time are shown Figure 1

increase in activator dosage from 0.25 kg/t to 0.5 kg/t resulted in decrease in zinc loss in the tailings from 65.5% to 1.8%. But a further increase in the activator dosage to 1.0 kg/t affected the flotation selectivity due to undesirable activation at higher dosage (Singh et al 1998). 429

A new depressant for use in enhanced separation of polymetallic sulphides is described. The depressant agent is used in conjunction with conventional collector agents and frothing agents in the flotation separation of copper, nickel, lead, zinc sulphides by depressing iron sulphides such as pyrrhotite, pyrite and marcasite in the tailing

Apr 01, 2018 To float pyrite depressed in copper flotation, sodium sulfide or sodium hydrosulfide is normally used to activate pyrite. Seaman et al. (2012b) found that in order to obtain 70% pyrite recovery, the dosage of sodium sulfide was required to be as high as 460 g/t in a copper-gold flotation plant

2. pH is important for pyrite flotation. Normally, pyrite can float well at acid conditions without adding any activator. However, if you want to float the pyrite at alkaline conditions, you need to add Cu2+ as activator, because pyrite can be depressed at alkaline conditions. 3. The effectiveness of activator (e.g. copper sulphate) can be affected by the pulp chemistry, such

Sep 26, 2021 It means adding an activator to activate it in order to select a certain mineral. When the pyrite is heavily oxidized, add sulfuric acid to dissolve the oxide film on the surface of the pyrite before the pyrite is selected to expose a

flotation plants is to reject pyrite to produce a marketable grade concentrate. More recently, clean air regulations mandate pyrite removal from smelter feeds to reduce the emission of acid rain precursor. Pyrite, like a number of other sulfides, may be activated for more efficient flotation by interaction with dissolved heavy metals ions, e.g., Cu2+. Activation may be

Jun 20, 2020 Flotation recovery of pyrite and arsenopyrite in the presence of copper ions and sodium carbonate as a function of the sodium humate concentration. C(NaBX) = 10 10 −5 mol/L; C(MIBC) =10 mg/L; C(Cu 2+ ) = 5 10 −5 mol/L; C(Na 2 CO 3 ) =30 mg/L; pH = 8.5

Jun 08, 2016 The most widely used sulphidizer is sodium sulphide, which is commonly used in the flotation of lead carbonate ores and also slightly tarnished sulphides such as pyrite and galena. In the sulphidization of ores containing precious metals careful control must be exercised as in some instances sodium sulphide has been known to have a depressing effect on

after a possible addition of an activator or ... collectors of the sulfonate type that are currently used in the Chaillac plant. ... liberation appear to be hindering the cleanability of pyrite

Copper Sulfate as Flotation' Activator for Sphalerite BY 0. C. RALSTON,* C. R. KING* AND F. X. TARTAHON,* CLARKDALE, ARJZ. (San Francisco Meeting, October, 1029) THE use of copper sulfate for improving the flotation behavior of sphalerite is probably at lcast 15 years old. The original discovery of its activating influence is somewhat obscure

Aug 10, 2015 Flotation Conditioners -Modifiers -Activators -Depressants. This branch of chemicals will prepare the mineral surface so other reagents will be able to collect the metal. For Conditioners and Modifiers, it may be simply cleaning the surface of the particles, as in the case of removing oxidization, or it may be a chemical that these are the

ordinary activator for beryl, it was expected that it would also affect quartz in a similar manner. To de termine the response of quartz to sulfonate flotation in the absence of iron, the quartz was batch-leacped with aqua regia for 18 hrs. Following this, the ma terial was washed with conductivity water until the

Arsenopyrite is separated from a mixture with pyrite by contacting the mixture with a sulfitic agent providing HSO3- ions at elevated temperature and pH below about 8 for a period sufficient to impart a selective depression property to the arsenopyrite. On addition of a collector the pyrite is rendered floatable, enabling froth flotation to achieve a concentrate rich in pyrite and tailings

The effects of carboxyl, sulfonate, hydroxyl or thiourea functional groups attached to the polymers on the flotation recoveries of sphalerite and

Such a different trend in flotation behavior of the mixed sample from the flotation behavior of the single minerals was because the surface oxidation reaction of arsenopyrite, which was more affected by E H among the mixed arsenopyrite and pyrite, generated ferric arsenate, a hydrophilic compound, on the surface of arsenopyrite, resulting in

Lead hydroxyl compounds are known as rutile flotation of the traditional activated component, but the optimum pH range for flotation is 2–3 using styryl phosphoric acid (SPA) as collector, without lead hydroxyl compounds in slurry solution. In this study, Bi3+ ions as a novel activator was investigated. The results revealed that the presence of Bi3+ ions increased the surface

Reverse Flotation. September 2018. DOI: 10.5772/intechopen.74082. In book: Energy Systems and Environment. Authors: Fatma Deniz zt rk. Fatma Deniz zt rk. This person is not on ResearchGate

Aug 10, 2015 Flotation Collectors. Simply said; a Flotation Collectors is a chemical used to make the surface of minerals, which is metallic, hydrophobic or in layman’s term ‘afraid of water’ or ‘water hating’ as others like to say. This chemical used will behaved, in a way, as a wax would when you applied it to your car. After wax (or hydrophobic

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The flotation reagent consumptions are minimum. The majority of chalcopyrite remains in the sulfur flotation tailings and can be readily recovered by flotation with different flotation reagents. When amyl xanthate is used, 85% of chalcopyrite can be recovered with a copper grade of 14.5% in a single-stage froth flotation. The chalcopyrite

The first flotation separation for the rejection of magnesite was reported by Doerner and Dwigh (1930s) [].Flotation of Mg carbonates is typically carried out by using fatty acids, since these collectors give insoluble complexes with all divalent cations [].Determination of the appropriate depressing reagents for sinking valuable minerals in the presence of collectors for carbonates

Aug 15, 2013 Sodium sulfide manufacturers as an inhibitor for the inhibition of sulfide ores are mainly two aspects generally considered one Na2S hydrolysis HS-HS-exclusion sulfide mineral surface itself while adsorbed xanthate adsorption on mineral surfaces to increase the hydrophilicity of the mineral surface the other hand, that not only act as a disincentive Na2S