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Fluorite Flotation Process Based on DoE Methodology J.R. Corpas-Martínez 1, A. Pérez 2, C. Amor-Castillo 3, R. Navarro-Domínguez 4, ... present in the flotation process, dispersants as sodium silicate have an important role upgrading the depressant action [16]. Fatty acids and their soaps are often used as collectors in flotation for
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With the recent increasing use of hydroxamic acid collectors in rare earth flotation, sodium silicate is used to depress gangue silicates prior to the addition of the collector [27, 28]. At low alkaline conditions (pH 9.0), the depressing action of sodium silicate upgraded a rare earth concentrate from 9.8–12 to 34–55% TREO content .
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Depressants in fluorite flotation, which are used for decreasing the floatability of calcite …
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In this study, the activation mechanisms of fluorite inhibited using Na 2 SiO 3 by adjusting the solution pH to neutral and slightly alkaline conditions were investigated. The solution chemistry of sodium silicate and microflotation tests showed that SiO(OH) 3 − in the Na 2 SiO 3 solution strongly inhibited fluorite flotation, while H 4 …
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A flotation recovery method of silicon from metallurgical-grade silicon …
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Acidized sodium silicate showed to be an alternative depressant for carbonate minerals at a neutral pH (Zhou and Lu, 1992, Ding and Laskowski, 2006). As acidized sodium silicate (water glass) is an inorganic reagent and works in neutral or weak-acidic media, it might be a good alternative depressant for sodium lignosulfonate …
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A sample of 250 g was processed by flotation at room temperature (20-25 • C). Warm distilled water was used for flotation, and a dosage of 1000 g/t of sodium silicate (produced by Ridel-de Haen ...
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1.Introduction. Fluorite, an essential strategic nonmetallic mineral resource, finds extensive applications across metallurgy, the chemical industry, construction materials, medicine and national defence [1], [2], [3].Fluorite resources are abundant on a global scale; in recent years, however, high-grade and easily separable fluorite …
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A new type of depressant and a new process were used in floatation test of a high-carbonate and sludge content fluorite ore. Part of calcite and most of fluorite were separated with sludge by ...
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Fluorite, CaF2, is considered a strategically important mineral as it is a raw material for many strategic industries. Froth flotation is reported to be the most efficient and economically viable process for the production of an acid-grade product with a CaF2 content of at least 97%. Selective flotation of fluorite from gangue minerals, e.g., …
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As an important strategic non-metallic mineral resource, fluorite has been widely used in various industrial fields, such as metallurgy, optics and semiconductor manufacturing, as well as fluorine-related chemical engineering. Since the major gangue minerals of fluorite ore are silicate and carbonate ones, flotation is the main …
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In this study, the activation mechanisms of fluorite inhibited using Na 2 SiO 3 by adjusting the solution pH to neutral and slightly alkaline conditions were investigated. The solution chemistry of sodium silicate and microflotation tests showed that SiO(OH) 3 − in the Na 2 SiO 3 solution strongly inhibited fluorite flotation, while H 4 SiO 4 and SiO …
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Water glass (sodium silicate solutions) and water glass mixed with inorganic salt ions are traditional flotation modifiers that utilize SiO 3 to depress the flotation of calcite and fluorite (Marinakis and Shergold, 1985, Rao et al., 1990). They are widely used in flotation plants in the form of water glass (Haisheng et al., 2017), …
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The impact of calcium and gypsum on separation of scheelite from fluorite using sodium silicate as depressant was investigated by micro-flotation tests, X-ray photoelectron spectroscopy (XPS ...
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As a common depressant, acidified water glass (AWG) has strong inhibitory effects on fluorite and calcite. The inhibited fluorite is difficult to be recovered, thus resulting in the waste of resources and low flotation efficiency. In this study, the interaction of fluoride ions with fluorite and calcite surfaces was investigated, and its effects of …
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Combined with the flotation and adsorption results, the mechanism of sodium silicate inhibiting fluorite is that sodium silicate will envelop sodium oleate during heating cleaning, resulting in sodium oleate not re-adsorbing on the fluorite surface. ... Thus, the Crago flotation process was evaluated to recover the iron contained in the …
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DOI: 10.1016/j.molstruc.2024.137861 Corpus ID: 267961041; The mechanism of sodium silicate depressing fluorite in scheelite heating flotation @article{Xu2024TheMO, title={The mechanism of sodium silicate depressing fluorite in scheelite heating flotation}, author={Shitong Xu and Haiwei Huang and Baiqing Wang and Sili Ren}, …
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The harsh flotation process conditions make mineral processing ... by means of a 1:1 ratio of sodium carbonate and sodium silicate. Fluorite is the most problematic mineral in flotation with fatty ...
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Sodium silicate Sodium silicate is a soluble inorganic silicate often used in industrial production as the primary depressant for fluorite, calcite, and apatite [3,9,31–32]. In field production, sodium silicate helps achieve good flotation index, as demonstrated by Martins and Amarante [33] and Ji et al. [34]; Martins and Amarante used sodium ...
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Chemically pure reagents of sodium oleate (NaOl, C 18 H 33 O 2 Na), sodium silicate (Na 2 SiO 3 ·9H 2 O) and calcium chloride (CaCl 2) were supplied by Sinopharm Chemical Reagent Beijing Co., Ltd, China.The calcium solution was prepared with a calcium concentration of 1.18 × 10 −2 mol/L [34], respectively.The pH values …
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Recovery of silicon from metallurgical-grade silicon-refined slag by flotation with sodium silicate as depressant. Author links ... During the flotation process, ... CAO Yi-jun, MA Zi-long, LIAO Yin-fei. Impact of calcium and gypsum on separation of scheelite from fluorite using sodium silicate as depressant [J]. Separation and Purification ...
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Flotation tests on fluorite ores with various carbonate content (CaCO 3 contents from 4.43% to 74.40%) were carried out using acidized sodium silicate (A.S.S.) as modifier and oleic acid as collector. A high purity fluorite concentrate (99% CaF 2) was obtained. It was demonstrated that A.S.S. has an activating effect …
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Depressant effects of carboxymethyl cellulose (CMC) and sodium silicate on flotation of ilmenite and forsterite using sodium oleate (NaOL) as a collector were investigated by single mineral ...
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The samples of fluorite and quartz were all acquired from Hunan, China. Fig. 1 shows the preparation process of experimental samples. The laboratory scale shear crusher (FW100) was used to break the two mineral crystals into a particle size of − 1 mm, and then the fine crushing was used to further grind them to 74–38 µm as samples for …
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Sodium silicate (SS) is the generally used fluorite inhibitor in bastnaesite flotation, and ... found that, in the flotation separation process, the absolute value of the adsorption energy of fluorite for SiO(OH) 3 was obviously higher than that of Si ... reducing the adverse effects of fluorite on the flotation of bastnaesite. Under different pH
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Selective action of sodium silicate increases with increasing aluminum salts and therefore reduces the inhibitory effect of sodium silicate on fluorite. The quartz and silicate gangue minerals found in the fluorite ore in the alkaline medium, which is usually the fluorite flotation medium, are highly negative in surface charge [4–6].
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DOI: 10.1016/J.MOLLIQ.2018.07.048 Corpus ID: 105468053; Comparative study on adsorption and depressant effects of carboxymethyl cellulose and sodium silicate in flotation @article{Wang2018ComparativeSO, title={Comparative study on adsorption and depressant effects of carboxymethyl cellulose and sodium silicate in flotation}, …
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Sodium silicate (SS), a commonly used inhibitor in rare earth mineral flotation, is widely applied in the bastnaesite flotation process to suppress calcium-bearing gangue minerals ... Impact of calcium and gypsum on separation of scheelite from fluorite using sodium silicate as depressant. Sep. Purif. Technol., 215 (2019), pp. 249 …
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The most common process for enhancing the quality of fluorite ores is the …
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The flotation behavior of fluorite at a high pH (>12) is distinctly different …
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