An example of testing the effect of pH on rougher flotation on pit samples and the results are presented. Since this is only an example, it needs reminding that not all ores will respond the same. Here, rougher flotation is most Selective at a pH of 9.5 as pH levels in the 9 to 10 range yielded 1% to 2% better recoveries. Mineralogy data also supports this and shows between 3% and 10% of the
In flotation, pH control is a vital method to control selective mineral separation. A standard depressant that is used is an Alkali. An Alkali is any substance that when mixed with Acid will neutralize each other and form a new chemical substance called a BASE. This is very important. The ore may be either alkaline or Acidic. To have a positive control over flotation, it is necessary to be
Jan 01, 2018· Flotation recovery of chalcopyrite (a) and molybdenite (b) as a function of the concentration of copper ions and sulfide ions at pH 8. The separation performance of chalcopyrite and molybdenite using Na 2 S as a depressant was investigated at different Cu 2+ concentrations.
Flotation of grinding products with 55, 60, 65, 70, and 75% of grain size <74 μm, was conducted at the pulp’s pH values of 10 and 12. Higher copper recovery was obtained in concentrates at pH 10, b...
evaluated the effect of three chemical reagent configuration on selective flotation in low and high pyritic copper sulphide ores. They showed that the collector of isopropyl-n-ethyl thionocarbamate creates the highest copper grade and the lowest iron recovery (Hassanzadeh and Hasanzadeh, 2016).
Enargite flotation in seawater is depressed at reducing and oxidizing conditions. • Calcium and magnesium interact with enargite not only by physical means but also through chemical interactions at high E h.. The depressing effect of calcium is stronger than the depressing effect of magnesium on enargite flotation at high E h.. The presence of highly stable compounds such as hydrophilic
effect of ph on copper flotation (PDF) Effect of copper and iron ions on the sulphidizing Effect of copper and iron ions on the sulphidizing floatation of copper in copper smelting slag To cite this article: Qing-Qing Pan and Hui-Qing Peng 2018 IOP Conf. Ser.: Earth Environ.
The impact of water quality on flotation performance pH, Eh, DO and dissolved species in recycle water streams (e.g. thickener overflow, decant (tailings) dam return) contributing to a circuit water are also shown in Table I. TDS and TOC levels may also be raised by reagent addition for pH control (e.g. lime) and recycled organics (e.g
Abstract—This study investigated the effect of pH on the recovery and grade of the Platinum Group Metals (PGMs) and base metal sulphides from the UG2 ore of the bushveld complex. This was achieved through running a series of test work in a Denver flotation cell at varying pH 6-11 at constant reagent dosage. The UG-2 reef is characterized by two
At high pH values (above 10.5), the forged media is passivated, so as the pH of the system drops the media corrosion rate increases and floods the system with the corrosion products, affecting flotation. As the high chrome media is much more inert, pH has less of an effect on copper flotation response.
Understanding the effect of temperature on the speciation of multivalent metals in solution is essential for many applications in industry. The results of the present Cu(II) and Zn(II) solutions speciation studies in tandem with thermodynamic calculations have shown that Cu2+ or Zn2+ ions proliferate in acidic solutions whilst in alkaline medium, solid Cu(OH)2 or Zn(OH)2 colloidal particles form.
flotation cell. The pH was adjusted by lime and Merck sulfuric acid. Na 2 S was applied as copper minerals depressant and also flotation pulp potential adjustment. 50 g/t diesel oil was used as molybdenite collector. Flotation pulp potential measured with an ORP electrode (Ag/AgCl) in presence of nitrogen gas and air.
The effect of the parameters such as pH, pulp density, particle size and collector amount were investigated. KAX was used as collector and Dow-250 was used as frother. Key Words: Sulfurization, flotation, copper, gold, silver 1. INTRODUCTION Flotation has been utilized in the mineral processing industry to concentrate base
Control of pH is one of the most widely applied methods for the modulation of mineral flotation. In this study the effect of pH on potential in solution and sulphur minerals flotation is discussed with various electrodes. The electrodes were platinum, gold, chalcopyrite, pyrite and galena. In solution, potentials were linearly dependent on pH with a different slope for each electrode.
Abstract—This study investigated the effect of pH on the recovery and grade of the Platinum Group Metals (PGMs) and base metal sulphides from the UG2 ore of the bushveld complex. This was achieved through running a series of test work in a Denver flotation cell at varying pH 6-11 at constant reagent dosage. The UG-2 reef is characterized by two
effect of ph on copper flotation (PDF) Effect of copper and iron ions on the sulphidizing Effect of copper and iron ions on the sulphidizing floatation of copper in copper smelting slag To cite this article: Qing-Qing Pan and Hui-Qing Peng 2018 IOP Conf. Ser.: Earth Environ.
The adsorption of Cu species onto pyrite surface and its effect on flotation were investigated by using microflotation tests, first-principle calculations, and XPS surface analysis. The results indicated that the flotation of pyrite appears to be activated with CuSO<sub>4</sub> only at alkaline pH, while being depressed at acidic and neutral pH. The adsorption of copper ions on pyrite surface
Modelling Of Pyrite Depression Process By Lime In Copper. Effect of ph value on the required concentration moll of ethyl xanthate x ensuring maximum pyrite 1 pyrrhotite 2 and chalcopyrite 3 flotation floatability of copper and iron sulphides in the absence of lime can be explained by taking into account the composition of natural sulphides oxidation products
CHAPTER 7 EFFECT OF CONDITIONING PH ON FLOTATION 96 flotation pH of 7.2. At this point, the pulp potential was 0.3V. Flotation was then carried out using the reagent suite of the standard. 7.2 Results and Discussion 7.2.1 Sulphur Table 7.1 shows sulphur flotation initial rates and corresponding final recoveries for the two conditioning pHs.
Effect of pH on surface characteristics and flotation of sulfidized cerussite 677 2003; Rashchi et al., 2005; Kuchar et al., 2006). Unfortunately, difficulties in controlling the dosage of sulfidizing agents are a common issue. An excessive amount may cause the depression of oxidized minerals, whereas an insufficient amount results
In this study the effect of pH on potential in solution and sulphur minerals flotation is discussed with various electrodes. The electrodes were platinum, gold, chalcopyrite, pyrite and galena.
In order to study the influence of S 2−, Cu 2+, and Fe 3+ ions on the flotation of copper oxide, the flotation experiments with various pH values and different amount of Na 2 S, CuSO 4, and FeCl 3 were conducted. The results of copper oxide flotation are shown in Figure 3. The recovery of CuO under different pH conditions is shown in Figure 3(a).
Four. Pulp pH value. When the minerals are floated by different flotation reagents, there is a critical pH value of “float” and “not float”. The pulp pH value often directly or indirectly affects the floatability of the minerals. But the critical pH value will change with the flotation conditions.
At high pH values (above 10.5), the forged media is passivated, so as the pH of the system drops the media corrosion rate increases and floods the system with the corrosion products, affecting flotation. As the high chrome media is much more inert, pH has less of an effect on copper flotation response.
Understanding the effect of temperature on the speciation of multivalent metals in solution is essential for many applications in industry. The results of the present Cu(II) and Zn(II) solutions speciation studies in tandem with thermodynamic calculations have shown that Cu2+ or Zn2+ ions proliferate in acidic solutions whilst in alkaline medium, solid Cu(OH)2 or Zn(OH)2 colloidal particles form.
In order to study the influence of S 2−, Cu 2+, and Fe 3+ ions on the flotation of copper oxide, the flotation experiments with various pH values and different amount of Na 2 S, CuSO 4, and FeCl 3 were conducted. The results of copper oxide flotation are shown in Figure 3. The recovery of CuO under different pH conditions is shown in Figure 3(a).
CHAPTER 7 EFFECT OF CONDITIONING PH ON FLOTATION 96 flotation pH of 7.2. At this point, the pulp potential was 0.3V. Flotation was then carried out using the reagent suite of the standard. 7.2 Results and Discussion 7.2.1 Sulphur Table 7.1 shows sulphur flotation initial rates and corresponding final recoveries for the two conditioning pHs.
366 Decoupling the Effects of Pulp Potential and pH on the Flotation of Pyrite 1P. Forson, 2L. D. Ayedzi and 1G. Abaka-Wood 1Future Industries Institute, University of South Australia, Mawson Lakes Campus, SA 5095, Adelaide, Australia 2Ghana Manganese Company Limited, Nsuta, WR, Ghana Forson, P., Ayedzi, L. D. and Abaka-Wood, G.B. (2020), “Decoupling the Effect of Pulp Potential and pH on the
Four. Pulp pH value. When the minerals are floated by different flotation reagents, there is a critical pH value of “float” and “not float”. The pulp pH value often directly or indirectly affects the floatability of the minerals. But the critical pH value will change with the flotation conditions.
Modelling Of Pyrite Depression Process By Lime In Copper. Effect of ph value on the required concentration moll of ethyl xanthate x ensuring maximum pyrite 1 pyrrhotite 2 and chalcopyrite 3 flotation floatability of copper and iron sulphides in the absence of lime can be explained by taking into account the composition of natural sulphides oxidation products
May 01, 2002· Effect of Al(III) as an Activator for Adsorbing Colloid Flotation. Separation Science and Technology 1984, 19 (13-15),1061-1072. DOI: 10.1080/01496398408058348. Witold A. Charewicz, Sergiusz Basak. A kinetic study of precipitate flotation of Zinc(II), Cobalt(II) and Copper(II) hydroxides.
flotation cell. The pH was adjusted by lime and Merck sulfuric acid. Na 2 S was applied as copper minerals depressant and also flotation pulp potential adjustment. 50 g/t diesel oil was used as molybdenite collector. Flotation pulp potential measured with an ORP electrode (Ag/AgCl) in presence of nitrogen gas and air.
A detailed study was conducted to evaluate the effect of particle size, pH, flotation time, collector type and addition on efficiency of tennantite flotation. It was shown that maximum copper recovery of 95,3% was obtained at pH 12.3 by lime.It was suggested to grind up to 65.72% of -0.074 mm to achieve the optimum recovery of copper and high
Flotation is an important and versatile mineral processing technique that is used In this case flotation is used to separate copper from the unwanted gangue. The addition of lime is used to control the pH level in the flotation’s pulp, which governs the selectivity of the
The nature of the effect of the underground water at Mufulira, particularly the sensitivity of the flotation to the pH at which the milling was conducted, characterized galvanic interaction. A large-scale plant situation is presented in which the desired electro-chemical response in the flotation was achieved, by a deliberate manipulation of
will produce compensating effects in other areas (Klimpel, 1995) Froth flotation is a good example of an engineering “system”, in that the various important parameters are highly inter-related, as shown in Figure 1. It is therefore important to take all of Chemistry Components Collectors Frothers Activators Depressants pH
Effect of pH on Flotation Free download as PDF File (.pdf), Text File (.txt) or read online for free. Paper looks at effect of pH on flotation of different sulphide minerals
At high pH values (above 10.5), the forged media is passivated, so as the pH of the system drops the media corrosion rate increases and floods the system with the corrosion products, affecting flotation. As the high chrome media is much more inert, pH has less of an effect on copper flotation response.
flotation cell. The pH was adjusted by lime and Merck sulfuric acid. Na 2 S was applied as copper minerals depressant and also flotation pulp potential adjustment. 50 g/t diesel oil was used as molybdenite collector. Flotation pulp potential measured with an ORP electrode (Ag/AgCl) in presence of nitrogen gas and air.
May 01, 2002· Effect of Al(III) as an Activator for Adsorbing Colloid Flotation. Separation Science and Technology 1984, 19 (13-15),1061-1072. DOI: 10.1080/01496398408058348. Witold A. Charewicz, Sergiusz Basak. A kinetic study of precipitate flotation of Zinc(II), Cobalt(II) and Copper(II) hydroxides.
A detailed study was conducted to evaluate the effect of particle size, pH, flotation time, collector type and addition on efficiency of tennantite flotation. It was shown that maximum copper recovery of 95,3% was obtained at pH 12.3 by lime.It was suggested to grind up to 65.72% of -0.074 mm to achieve the optimum recovery of copper and high
Effect of pH on Flotation Free download as PDF File (.pdf), Text File (.txt) or read online for free. Paper looks at effect of pH on flotation of different sulphide minerals
366 Decoupling the Effects of Pulp Potential and pH on the Flotation of Pyrite 1P. Forson, 2L. D. Ayedzi and 1G. Abaka-Wood 1Future Industries Institute, University of South Australia, Mawson Lakes Campus, SA 5095, Adelaide, Australia 2Ghana Manganese Company Limited, Nsuta, WR, Ghana Forson, P., Ayedzi, L. D. and Abaka-Wood, G.B. (2020), “Decoupling the Effect of Pulp Potential and pH on the
Four. Pulp pH value. When the minerals are floated by different flotation reagents, there is a critical pH value of “float” and “not float”. The pulp pH value often directly or indirectly affects the floatability of the minerals. But the critical pH value will change with the flotation conditions.
CHAPTER 7 EFFECT OF CONDITIONING PH ON FLOTATION 96 flotation pH of 7.2. At this point, the pulp potential was 0.3V. Flotation was then carried out using the reagent suite of the standard. 7.2 Results and Discussion 7.2.1 Sulphur Table 7.1 shows sulphur flotation initial rates and corresponding final recoveries for the two conditioning pHs.
Effect of pH on biosorption by . Bacillus licheniformis. 4.3 Effect of Incubation Temperature: Figure 2 shows the effect of incubation temperature on metal biosorption. Maximum % removal of metal ions was observed at 30⁰C for Iron and 45⁰C for Copper ions with efficacy of
The nature of the effect of the underground water at Mufulira, particularly the sensitivity of the flotation to the pH at which the milling was conducted, characterized galvanic interaction. A large-scale plant situation is presented in which the desired electro-chemical response in the flotation was achieved, by a deliberate manipulation of
Flotation of nickel-copper sulphide ore optimisation of.2020-01-08 the flotation recovery of ni cu and co from a nickel-copper sulphide ore.the effect on flotation performance of various parameters such as ph collector dosage solids and depressant dosage at different levels was investigated.
Effect of pH on Copper Flotation Recovery VS Mass Pull. 7 · An example of testing the effect of pH on rougher flotation on pit samples and the results are presented. Since this is only an example, it needs reminding that not all ores will respond the same. Here, rougher flotation is most Selective at a pH of 9.5 as pH levels in the 9 to 10
butylxanthate, the pulp pH was not adjusted. The rotate speed of flotation machine is 4000 r/min. Distilled water was used throughout the experiments. In the same amount of flotation reagents, batch flotation was done on a different kind of particle. II. RESULTS AND DISCUSSION Batch flotation was done on five different size fractions
Effect of regrinding conditions on pyrite flotation in the presence of copper ions. International Journal of Mineral Processing 125: 129-136. Chen, X., Peng, Y. and Bradshaw, D., 2014. The separation of chalcopyrite and chalcocite from pyrite in cleaner flotation