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Efficient separation of naturally hydrophobic gangue, such as talc and carbonaceous materials, from sulphide minerals in flotation is becoming a significant challenge in many processing plants due to the need to process lower grade and more complex ores. Considering the hydrophobic nature of these gangue minerals, prefloating them at the beginning of the flotation circuit in the …


Abstract A novel method to improve carboxymethyl cellulose (CMC) performance in talc flotation is described in this paper. Micro-flotation results showed that using CMC as the depressant, strong depression on talc floatability was observed when the pulp pH was adjusted from low (4.0) to high (8.5), which improved the separation performance between chalcopyrite and talc.


As for the talc type Copper-Nickel Sulfide Ores, the talc entrained in flotation concentrate with will affect the grade of copper sulfide …


This study investigated the flotation in sodium dodecyl benzene sulfonate system, the effects of phytic acid on talc flotation mechanism, then proposed a new flowsheet to handle this kind talc ore, namely "one roughing-three cleaning-one scavenging''. The closed-circle flotation test in laboratory can obtain a concentrate with the SiO2 and CaO grade of the concentrate is 61.87% and 0.60% ...


In this study, the depressive effect of xanthan gum (XG) on molybdenite and talc flotation was studied using potassium butyl xanthate (PBX) as collector, and the mechanism through which molybdenite was separated from talc was investigated by Fourier transform infrared (FTIR) spectroscopy, Time-of-flight secondary ion mass spectrometry (TOF-SIMS), and X-ray photoelectron spectroscopy (XPS).


In the flotation of sulfide minerals, the separation of molybdenite and talc is a difficult problem. Talc is the main gangue mineral of molybdenite, it has good natural hydrophobicity and a similar layered structure as molybdenite, so inhibitors are often used to separate them. But the reverse flotation method is often used to inhibit molybdenite, and the separation effect is not satisfactory.


The natural hydrophobicity of talc was depressed by the use of ultrasonic treatment during flotation. The recovery of the talc decreased by nearly 30% after 4 min of ultrasonic preconditioning.


Talc: Part of 19 "Sub-A" Flotation Cells floating talc. Result: A concentrate approximately 94% talc produced at the rate of ¾ tons per hour. …


Talc is a naturally hydrophobic gangue mineral in most sulfide ores. However, talc has vast applications in the cosmetics, paper, and paint industries due to its high chemical stability, and its demand continues to grow. Since flotation is the most effective beneficiation technique for upgrading sulfides, the high hydrophobicity of talc has made its selective separation challenging.


The Differences in Evaluation of Flotation Kinetics of Talc Ore Using Statistical Analysis and Response Surface Methodology. Dušan Kudelas. Related Papers. The Behaviour of Mixtures of Sodium Iso-Butyl Xanthate and Sodium Di-Ethyl Dithiophosphate during the Flotation of a …


Figure 3b shows the effect of guar gum dosage on talc and pyrite flotation at a pH of 9. With the increase in the dosage of guar gum, the recovery of talc and pyrite decreased rapidly. When the dosage of guar gum was 50 mg l−1, the recovery rate of talc was only 5%. At this time, the flotation of talc was completely inhibited.


Talc nanoparticles size and time of flotation were found to affect the required amount of collector. Reducing the talc nanoparticles size from 567 nm to 235 nm caused the collector dosage to be significantly decreased from 45 kg t −1 to 2 kg t −1 within 30 min of flotation. The effect of flotation time on the collector dosage was found to ...


37 Full PDFs related to this paper Read Paper Adsorption of tailored carboxymethyl cellulose polymers on talc and chalcopyrite: Correlation between coverage, wettability, and flotation


The interaction of guar gum and dextrin with talc has been investigated through adsorption, flotation, and electrokinetic measurements. The adsorption densities are independent of pH and the isotherms exhibit Langmuirian behavior. Higher adsorption density of guar gum onto talc is observed vis-à-vis that of dextrin. Pretreatment of talc with a complexing agent such as ...


• additional reagents to improve sulfide flotation • minimisation of recycles to limit ability of talc to reconnect with sulfides. Ore from the Mount Keith open pit can be broadly classified into two types: talc and non-talc. Non-talc ore is primary, unaltered ore consisting of predominantly disseminated pentlandite, pyrrhotite and


Flotation recoveries of talc particles as a function of nozzle pressure. As seen from Figure 2, the recovery of about 41 % was obtained with the un-blasted sample. Besides, blasting the sample at 1 bar nozzle pressure increased the recovery up to 68 %, and then decreased it gradually down to 42% at 6 …


Related Project- Talc from Talc Ore (cosmetic Grade) Uses. ... A dilute talc slurry water is conditioned for flotation by the addition of a frothing agent e.g. glycol, and therefore the slurry is ...


Talc remains an important mineral with a wide array of applications in paints, paper, polymers, pharmaceuticals, and cosmetics industries when its associated impurities were accordingly processed due to its distinct surface properties. Thus, treatment of a Nigerian talc ore consisting of talc, vermiculite, and phillipsite was investigated using polyethylene glycol (PEG-6000) as frother to ...


flotation of talc prior to flotation of PGMs was tested to compare the two methods and the process flowsheet for this is shown in Figure 5.6. 1.2. PROBLEM STATEMENT There are two problems identified at the Mimosa Mine. They are: (i) Low PGE recoveries (79% compared to the South African Merensky operation's recoveries of between 80% and 95% ...


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3. 1. Micro-Flotation Experiments With The Blasted And Un-Blasted Talc Particles Many papers in the literature have been dedicated to the effect of morphological parameters in particular those on talc flotation (Kursun et al., 2006, Ulusoy et al., 2011). Most of these studies have


Talc is both an important industrial mineral product recovered by flotation, and also in other cases, a gangue mineral of concern in the flotation of certain sulfide ores, such as the PGM ores ...


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Depressants | Solvay

Depressants make it possible to increase final recovery consistently without sacing concentrate grade. They can either depress the effect of hydrophobic gangue minerals in the ore that would otherwise report with the froth along with the desired mineral, or hold down the desired mineral while floating the undesirable gangue.


flotation of talc prior to flotation of PGMs was tested to compare the two methods and the process flowsheet for this is shown in Figure 5.6. 1.2. PROBLEM STATEMENT There are two problems identified at the Mimosa Mine. They are: (i) Low PGE recoveries (79% compared to the South African Merensky operation's recoveries of between 80% and 95% ...


layered silicate minerals such as talc. Talc is a hydrous magnesium silicate, Mg 3Si 4O 10(OH) 2, which is related to the sheet structure of the p hyllosilicate (Yehia and Al Wakeel, 2000[1]). However, natural floatability of talc is closely related to its three-layer sheet crystal structure (Fuerstenau et al., 2003 [2] and Fuerstenau .et al ...


Flotation Columns In India For Talc. Posts Related to talc flotation plant in georgia usa » rubber talc factory mill china pakistan. Learn More. . Talc powder making plant . technology or using flotation. Talc ore is then milled to . SBM Machinery is good at talc powder grinding solutions. ---- India. Read More


structures, indicating that the talc ore contains admixtures of associated impurities (Fig. 2). Flotation (Dense Medium Separation) Concentrate The flotation treatment of raw ore as examined by XRD (Fig. 3) showed that the concentrate obtained was made up of talc (Mg 12.00Si 16.00O 48.00: 96-900-8041) and phillipsite (K 1.76Na 1.44Ca 0.64Al l6 ...


Talc is a naturally hydrophobic gangue mineral in most sulfide ores. However, talc has vast applications in the cosmetics, paper, and paint industries due to its high chemical stability, and its demand continues to grow. Since flotation is the most effective beneficiation technique for upgrading sulfides, the high hydrophobicity of talc has made its selective separation challenging.


The Art of Talc Flotation for Different Industrial Applications. January 2016. Journal of Minerals and Materials Characterization and Engineering 04 (03):218-227. DOI: 10.4236/jmmce.2016.43020 ...


Flotation is the preferred concentration technique to remove impurities from talc Kho and Sohn, 1989). Various factors that control the flotation process of talc include particle size, pH values, collector dosage, depressant dosage, pulp density and frother dosage which were


What is Talc. The term talc refers both to the pure mineral and a wide variety of soft, talc-containing rocks that are mined and utilized for a variety of applications. Talc forms mica-like flakes. Talc is the softest mineral on the Mohs hardness scale at 1 and can be easily cut and crushed. Talc has perfect cleavage in one direction.


• Talc (non-sulphide fines) removal by flotation is sometimes required prior to sequential flotation of Cu, Pb, and Zn. Copper losses to the talc concentrate can be recovered by reverse copper flotation from the talc concentrate, which will be implemented in the processing plant if required.


Flotation behavior of different sizes of particles may follow different trends. The influence of particle size in talc suppression by a depressant galactomannan was studied in this research. The flotation response and mechanism were examined by flotation tests, modified flotation rate constant and entrainment recovery calculation, laser particle size experiments, adsorption tests, and ...


Talc has found a steadily increasing number of uses such as cosmetics, steatite and cordierite ceramics, for pitch control in the paper industry and as a reinforcing filler in rubber, etc. In this research, the amenability of some Egyptian carboniferous finely disseminated talc ores to beneficiation by flotation was investigated on laboratory scale.