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

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

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

Although talc can be considered a naturally hydrophobic mineral, it might need treatment to float. Investigation on pure talc flotation showed that it could float …Web

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

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

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

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

The Effect of Sodium Hexametaphosphate on Natural Flotation Kinetics of Talc Ore Ivan BREZÁNI1), Martin SISOL2), Michal MARCIN3) 1) Department of mineral processing; Institute of earth resources, Faculty of …Web

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

The effect of a novel depressant on the separation of talc and copper –nickel sulfide ore. This paper researched the influence of the polysaccharide polymer sodium alginate (SAG) on the depression of talc at a fixed room temperature about 25 °C through micro flotation and batch flotation….Web

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

During froth flotation, the more non-polar, friable talc (Mg3(Si2O5)2(OH)2) usually adheres to the surface of sulfide ore and floats up, causing difficulties in flotation separation and subsequent ...Web

Talc-Related Legal Proceedings Are Still a Risk. As noted in the company's S-1, a significant number of personal injury claims alleging that talc causes cancer have been made against Johnson ...Web

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

This paper investigated the effects of using or not using potassium butyl xanthate (PBX) as a collector on the flotation kinetics of talc and chalcopyrite. By means of atomic force microscopy (AFM), Fourier-transform infrared spectroscopy (FTIR), a contact angle measuring instrument and particle size analyzer, the underlying causes behind the …Web

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

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

The flotation behavior of molybdenite and talc as a function of pectin dosage, pH values, and CuSO 4 dosage is depicted in Fig. 3. Fig. 3 a1 shows the effect of pectin dosage on talc/molybdenite flotation at pH 9. Clearly, pectin alone merely suppressed talc and molybdenite, although their recovery dropped from 89% to 80% and from 93% to …Web

Other works studied the adsorption of CMC on silicate minerals in the flotation of talc ore (Cuba-Chiem et al. 2008). Those authors revealed that CMC was adsorbed on the talc surface via a chemical complexation mechanism with the intervention of carboxyl groups in order to create an adsorbent layer resulting in the depression of …Web

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

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

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

DOI: 10.1016/J.MINENG.2018.11.003 Corpus ID: 106229609; A novel method to improve carboxymethyl cellulose performance in the flotation of talc @article{Liu2019ANM, title={A novel method to improve carboxymethyl cellulose performance in the flotation of talc}, author={Cheng Liu and Wencai Zhang and …Web

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

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

The effect of the depressant galactomannan (KGM) on the depression of talc and the flotation of a nickel–copper sulfide ore have been investigated through …Web

The depression of talc and other magnesia-bearing minerals has therefore been the focus of a great deal of research. Depressants play an important role in affecting selective separation of nickel minerals from ores by flotation. Polysaccharides and their derivatives are depressants for talc and other magnesia-bearing minerals.Web

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

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

Al ion was reported to have an enhanced depression of Carboxymethyl cellulose (CMC) on talc flotation. However, how Al ion is adsorbed on talc surface …Web

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 …Web

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

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

The mechanism of carrageenan in the flotation separation of chalcopyrite from talc when using collector sodium butyl xanthate (SBX) was investigated. Micro …Web

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 …Web