• منطقة بودونغ الجديدة ، شنغهاي ، الصين .
  • [email protected]

CHAPTER 7 FLOTATION OF SULPHIDE MINERALS

Flotation of Sphalerite (ZnS) Flotation of sphalerite with amyl xanthate is possible at pH 3.5 and decreases as the pH is ... Then activation of sphalerite with copper sulphate and high pH to depress pyrite enables a sphalerite concentrate to be made. Finally a …

اقرأ المزيد

ANALYSIS OF FUNCTION OF COPPER SULFIDE NANOPARTICLES AS SPHALERITE

Abstract The authors compare the effect exerted by copper ions and sulphide copper nanoparticles on flotation of Gorevka deposit sphalerite using potassium n-butyl xanthate and in reagent-less regime. Covelline-like colloid particles 4–8 nm in size, obtained in interaction of copper (II) and sulfide ions in aqueous solutions, are characterized using …

اقرأ المزيد

Effect of NaCN:ZnSO4 Mixture Molar Ratio and Particle-Size

This work studies the depression of sphalerite and pyrite with a NaCN:ZnSO4 mixture in the selective separation of Pb-Zn by flotation when the blend is enriched with Ag. Given in this paper are an explanation of depression mechanism and the method for optimizing the Pb-Ag recovery. This was done by analyzing the …

اقرأ المزيد

Cyanide chemistry and its effect on mineral flotation

The copper activation of sphalerite flotation has recently been reviewed by Chandra and Gerson (2009). It has been well established ( Gerson et al., 1999, Popov and Vucinic, 1990, Prestidge et al., 1997, Ralston and Healy, 1980a ) that under mildly acidic conditions, Cu 2+ activating sphalerite follows an ion exchange mechanism where the ...

اقرأ المزيد

Effect of Copper Sulfate on Zinc Sphalerite Flotation

As an example of the beneficial effect of copper sulfate in the activation of zinc sphalerite toward flotation, the series of results shown in Fig. 1 is of interest. These represent rougher tests on a sample of heavy pyritic ore. The particular sample in question contained about 5.6% zinc as marmatite; and was treated in a circuit made alkaline ...

اقرأ المزيد

Critical importance of pH and collector type on the flotation of

It was shown that sphalerite could be activated by cuprous cyanide complexes in the lead flotation circuit and it leads to the copper adsorption on the sphalerite surface. It means that higher cyanide is needed to leach out copper from the sphalerite surface for the efficient depression of sphalerite 12 .

اقرأ المزيد

Minerals | Free Full-Text | Mineralogy and Innovative Flash Flotation

The flotation separation of common copper-lead ore includes copper depression and lead flotation, or lead depression and copper flotation. The former often uses cyanide to depress chalcopyrite, pyrite, and sphalerite; the latter uses dichromate to depress galena, and also has depression effect on pyrite [ 28, 29 ].

اقرأ المزيد

Effect of copper ions on surface properties of ZnSO4

Similarly to copper and lead minerals, zinc oxide is more difficult to enrich by flotation than sphalerite, which is the main mineral from which zinc is obtained [4]. In zinc production, most multi-metal zinc-containing sulfide ores are processed by flotation, in which other valuable minerals are floated before sphalerite.

اقرأ المزيد

Selective flotation of galena from sphalerite using a combination …

An effective reagent combination plays a crucial role in the flotation separation of galena and sphalerite. In this work, potassium permanganate (KMnO 4) was used to amplify the property difference between galena and sphalerite, carboxylated chitosan (CCS) was used to selectively depress sphalerite.The mechanism of CCS in …

اقرأ المزيد

Activation of Sphalerite by Ammoniacal Copper Solution in Froth Flotation

The activation of sphalerite particles by ammoniacal copper solution (ACS) was investigated in this study. This microflotation study was conducted on a single sphalerite mineral with the particles size of 38 μ m to 75 μ m. Results showed that ACS has somewhat better activation effect than copper sulphate (a traditional activator) with …

اقرأ المزيد

Effect of copper ions on surface properties of ZnSO4

Flotation is the most important method for recovering sphalerite, and it has attracted significant research attention worldwide. In this study to clarify the hotspots for phased research frontiers and research progress of sphalerite flotation technology in the last 20 years, 720 pieces of relevant academic literature were selected by using …

اقرأ المزيد

Galena (ga), sphalerite (sf), pyrite (py).

This paper reports the results of flotation tests conducted with a copper-lead-zinc sulphide ore. The major sulphide minerals in the ore are chalcopyrite, galena, sphalerite, marmatite and pyrite ...

اقرأ المزيد

The role of sodium metabisulphite in depressing pyrite in …

In the flotation of copper ores, copper sulphides are recovered while unwanted pyrite is depressed (Reyes-Bozo et al., 2014). ... The impurities in chalcopyrite are mainly quartz and a small amount of sphalerite and the impurity in pyrite is mainly quartz. The chemical assay together with XRD analysis reveal 85 wt% purity of the chalcopyrite ...

اقرأ المزيد

The flotation of sphalerite mine tailings as a remediation method

The sphalerite was then separated from the galena flotation tailings, activating it with 350 g/t of copper sulphate and using 20 g/t of potassium butyl xanthate as a collector. The Zn concentrate resulting after three re-cleaning stages had a content of 53.77% Zn and a recovery of 88.79%.

اقرأ المزيد

Improving Flotation of Sphalerite

conducted flotation tests of sphalerite- xanthate system and showed that the flotation of activated sphalerite is suppressed at the pH range of 6 to 9, depending on the amount of CuSO 4 added. They observed, as shown in Figure 6-1, that the larger the addition of copper sulfate, the wider

اقرأ المزيد

ANALYSIS OF FUNCTION OF COPPER SULFIDE …

This paper aims at determining the influence of copper sulfide nanoparticles on the activation and subsequent flotation of sphalerite. The conditions …

اقرأ المزيد

Critical importance of pH and collector type on the flotation of

It was shown that sphalerite could be activated by cuprous cyanide complexes in the lead flotation circuit and it leads to the copper adsorption on the …

اقرأ المزيد

Critical copper concentration in sphalerite flotation: Effect of

1. Introduction. Sphalerite is a valuable mineral for zinc and has been one of the most studied sulphide minerals in relation to its flotation (Finkelstein and Allison, 1976, Finkelstein, 1997).Recovery of sphalerite from ores is quite a complex process; generally its flotation needs to be first depressed in copper and lead circuit at neutral to mildly …

اقرأ المزيد

The role of sodium metabisulphite in depressing pyrite in …

The impurities in chalcopyrite are mainly quartz and a small amount of sphalerite and the impurity in pyrite is mainly quartz. The chemical assay together with XRD analysis reveal 85 wt% purity of the chalcopyrite. ... Numerous copper flotation plants have to use high salinity water, but high salinity water is detrimental to copper flotation by ...

اقرأ المزيد

Critical copper concentration in sphalerite flotation: Effect of

In this paper, the effect of pyrite on the activation of sphalerite was investigated by micro-flotation, copper adsorption experiments, X-ray photoelectron …

اقرأ المزيد

A review of the fundamental studies of the copper activation …

The uptake of copper and subsequent flotation of sphalerite is seen to depend on impurities, such as iron, present within natural sphalerite, surface …

اقرأ المزيد

Removal of lead minerals from copper industrial flotation concentrates

The author wishes to thank the managers of the Copper Ore Flotation Plant in Lubin for supplying the industrial copper flotation concentrate sample. This project was supported by a grant No. 9 T12 062 19 (I-11/350-198) from the Polish Committee for Scientific Research. ... galena and sphalerite. Consistent ore characteristics over many …

اقرأ المزيد

Flotation separation mechanism for secondary copper sulfide …

In this study, the flotation method was employed to recover sphalerite and pyrite from a galena flotation tailing waste. The reagent scheme, including Cu 2+ activator and butyl xanthate (BX) collector, can efficiently recover sphalerite and pyrite to obtain a two-mineral mixed concentrate with the Zn and Fe grades of ∼17 % and ∼26 % ...

اقرأ المزيد

Characterisation of sphalerite and pyrite surfaces activated by copper

It was also found that the flotation recovery and rate of copper-activated sphalerite at pH 10.5 are reduced when temperature is below 12 °C in the absence or presence of collector, which is in good agreement with observations made at several flotation plants that zinc recovery is on average less during winter than in summer. …

اقرأ المزيد

Flotation separation of galena from sphalerite using hyaluronic …

The effect of HA on the flotation of galena and sphalerite were evaluated by micro-flotation tests. The depression mechanisms were investigated by adsorption capacity, Zeta potential and X-ray photoelectron spectroscopy (XPS) analysis. ... The presence of chloride ion was shown to increase the extraction tendency toward copper …

اقرأ المزيد

Copper and xanthate adsorption onto pyrite surfaces

The ethylxanthate adsorption on copper-activated sphalerite under flotation-related conditions in alkaline media. Int. J. Miner. Process. (1990) S.R. Popov et al. ... Numerous copper flotation plants have to use high salinity water, but high salinity water is detrimental to copper flotation by promoting copper activation on pyrite. ...

اقرأ المزيد

Surface chemistry of Pb-activated sphalerite

Activation of sphalerite flotation by lead ions (Pb) is an important aspect of selective separation of sphalerite and galena, but its molecular mechanism remains poorly understood. ... of sphalerite occurred through an ion exchange mechanism involving the exchange of Pb 2+ with Zn 2+ which is similar to copper activation of sphalerite and is ...

اقرأ المزيد

A Review of the Flotation of Copper Minerals

The recovery of these copper minerals by flotation or hydrometallurgy from ores, typically containing 0.5%TCu (open pit mines) and 1-2%TCu (underground mines) is of great commercial importance ...

اقرأ المزيد

Characterisation of sphalerite and pyrite surfaces activated by …

The zeta potential studies confirmed CuS-type layer formation on copper activated sphalerite, whereas the surface product of the activated pyrite was CuFeS 2 …

اقرأ المزيد

Adsorption of DTC-CTS on sphalerite (1

In this study to clarify the hotspots for phased research frontiers and research progress of sphalerite flotation technology in the last 20 years, 720 pieces of relevant academic literature were selected by using "flotation" and "sphalerite, marmatite, and zinc sulfide" as keywords from the web of science database.

اقرأ المزيد

Cyanide chemistry and its effect on mineral flotation

Conclusions. Cyanide has been used to improve the selectivity in the flotation of base metal sulphide minerals. Iron, copper and zinc sulphides can be depressed by free cyanide when xanthate is used as collector. The mechanisms underlying the depression effect on pyrite flotation may be attributed to the formation of insoluble hydrophilic iron ...

اقرأ المزيد

Effect of regrinding conditions on pyrite flotation in the presence of

Role of copper ions in sphalerite-pyrite flotation selectivity. Miner. Eng. (2001) Z. Ekmekçi et al. ... In the flotation of copper ores, several processing plants report that copper recovery is affected by the proportion and reactivity of pyrite in the ore, with the effect becoming more intense when the feed particles are finer as a result of ...

اقرأ المزيد

Copper Lead Concentrate Separation

Copper Lead Separation Flowsheet A: A bulk copper and lead flotation, followed by a copper depression reverse. This scheme uses cyanide to depress the copper in the reverse process. With the use of cyanide in the reverse, cyanide was also used in the bulk flotation process to depress sphalerite and pyrite.

اقرأ المزيد

Effects of free cyanide and cuprous cyanide on the flotation of …

The results showed that FG exerts a selectively inhibiting effect on sphalerite in chalcopyrite flotation and thus is a potential sphalerite depressant. The underlying mechanisms were studied by contact-angle measurements, atomic force microscopy (AFM) imaging, Fourier transform infrared (FTIR) spectroscopy, and X-ray photoelectron …

اقرأ المزيد

A review of the fundamental studies of the copper

The presence of dissolved Cu ions promoted sphalerite flotation by Cu adsorption on their surface, and adversely affected the selectivity of copper flotation [32, 34, 35]. In further oxidation ...

اقرأ المزيد

A review of the fundamental studies of the copper activation …

Section snippets Activation of sphalerite. The activation of sphalerite has been studied extensively over several decades [5], [12], [13], [14]. While there is general agreement on the overall process of copper activation, the actual mechanism and surface reaction products controlling activation/flotation still remains controversial.

اقرأ المزيد