Talc and mica are major gangue minerals in many base metal ores including . Talc is a naturally hydrophobic mineral, and therefore it is easily floatable. There have been many studies to overcome this problem, and depress talc with various reagents. In this study the flotation of a copper ore muscovite was studied.Web
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Metal ions such as Fe 3+, Ca 2+, and Mg 2+ can improve and strengthen the flotation behavior of spodumene effectively, when NaOL or NaOL/DDA is used as a collector. The hydroxy complexes of these ions played an important role in the collector adsorption. In the aspect of spodumene collectors, most of the new spodumene …Web
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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 …Web
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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 …Web
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Abstract. Understanding the limits of fine particle flotation is the key to the selective separation of fine mineral particles. Fine particles have low collision efficiencies with gas bubbles and float slowly. There has been a great deal of work aimed at overcoming the inefficient collision of small particles with rising air bubbles.Web
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Since flotation is the most effective beneficiation technique for upgrading sulfides, the high hydrophobicity of talc has made its selective separation challenging. This paper explored …Web
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Results and discussion. Single mineral flotation results. A single mineral flotation experiment was carried out with PBX as collector, PAAS and GA as combined …Web
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D.A. Beattie replaced the hydroxyl groups at positions C and C6 of starch with hydroxypropyl groups, which improved the depression effect of th modified product for talc in the flotation of Ni-Cu ...Web
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The natural flotation behaviour of pure talc mineral was first studied by measuring its contact angle, flotation recovery and zeta potential. Polypropylene glycol was used as a frother to increase ...Web
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First, flotation deals with small particles, primarily < ... As shown in Fig. 4, the flotation recovery of rod milled talc is higher than that of ball milled products [34]. Rod mill produces the talc particles with higher elongation and flatness values than ball mill while ball mill produces the talc particles with higher roundness and relative ...Web
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In addition, since talc is a magnesium silicate mineral, large quantities of talc in flotation concentrates can cause problems during smelting, often resulting in the imposition of smelter penalties for mineral processing companies. The depression of talc has therefore been the focus of a great deal of research.Web
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Figure 3 b 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.Web
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Single mineral flotation test results showed that both chalcopyrite and talc were floatable in the tested pH range of 3–11 and that locust bean gum depressed the flotation of both minerals ...Web
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Abstract and Figures. 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 ...Web
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The purpose of this work is to highlight and classify the investigations that were conducted on talc flotation, defining sub-areas of studies, and highlighting the areas that require …Web
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The mechanism of carrageenan in the flotation separation of chalcopyrite from talc when using collector sodium butyl xanthate (SBX) was investigated. Micro …Web
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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. In addition, two talc depressants, namely, IMP4 and carboxymethyl cellulose (CMC), were compared during ultrasound treatment. The guar …Web
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Second, the suspended fine clay particles can be brought into the concentrate due to mechanical entrapment. Third, Farrokhpay et al. found that talc affected both the recovery and the grade of chalcopyrite by forth phase (Farrokhpay et al., 2018; Jeldres et al., 2019). Therefore, the depression of talc flotation attracted extensive …Web
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The surface of talc is covered by fine serpentine particles to form a dense film due to heteroaggregation, serpentine and talc particles produce a strong electrical repulsion when dispersant PAAS is added, which make serpentine and talc separate, and GA adsorbs on the surface of talc to depress its flotation, thus the adverse effect of talc …Web
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Figure 3 showed the effect of PAAS dosage on the flotation behavior of chalcopyrite, serpentine and talc. The experiment was carried out at pH 7. It can be seen from Fig. 3 that the dispersant ...Web
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This is even though much of the pyroxene is recovered by true flotation due to finely disseminated talc within the pyroxene . Hay and Roy ... Another method to deal with the removal of fines by entrainment is froth washing [5,22]. However, this is seldom used in the PGM industry due to the potential for loss of PGMs arising from such …Web
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review that analyzes the various conditions of talc flotation. The purpose of this work is to highlight and classify the investigations that were conducted on talc flotation, defining sub-areas of studies, and highlighting the areas that require further exploration for better understanding and optimizing of talc flotation.Web
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Both chalcopyrite and talc used for all experiments were collected from Yip's Mineral Specimen Company. After being hammered, hand-selected, dry-ground, and screened, a sample of 38−74 μm fractions was prepared for micro-flotation studies and −38 μm fractions were collected for adsorption tests, zeta potential measurements and FTIR …Web
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The depression of talc has therefore been the focus of a great deal of research. Polymers are most often used to depress talc in flotation. The accepted view of depressant action for polymers involves adsorption onto the gangue mineral phase through a variety of possible binding mechanisms (Healy, 1974) and, due to the presence of …Web
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The pulp pH is usually a key factor that affects the flotation of sulphide ore. Herein, the flotation recoveries of chalcopyrite and talc were demonstrated as a function of pH with 20 mg/L NaBX in the absence and presence of pullulan, as shown in Fig. 3.The recoveries of both minerals exceeded 85% in the pH range of 2.5–11.5 in the absence of …Web
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The flotation separation of chalcopyrite and talc is challenging due to their similar natural floatability characteristics. Besides, it is usually difficult to effectively inhibit talc by adding sodium carboxymethyl cellulose (CMC) alone during chalcopyrite flotation. Here, a combined inhibitor comprising acidified sodium silicate (ASS) and CMC was …Web
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The depression of talc in flotation processes acrylamide (Am) and vinylpyrrolidinone (VPD) as a synthetic has therefore been the focus of a great deal of research. depressant in froth flotation system. The concept of this synthetic Guar gum is one of the most widely used industrial depressants depressant is to develop a polymer with balanced ...Web
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An example is a native flotation of talc ore [4,5,6,7] or the collectorless flotation of sulfide minerals [8,9] and coal [10,11]. Nonetheless, even without using any additional flotation reagents, other physical, chemical, and engineering aspects of flotation must be considered . The use of modeling based on first-order kinetics is, therefore ...Web
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