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The flotation behavior of fluorite at a high pH (>12) is distinctly different …
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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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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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SFG provides molecular details about the adsorption of sodium silicate (SS). • SFG signal shows the change in surface charge and adsorption. • SS physically adsorbs at CaF 2 surface at pH < 7 and is removed by water flow.. SS chemically adsorbs at CaF 2 surface at pH > 7 and is unremoved by water flow.. SS penetrates the innermost water …
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•Depressants: Commercial grade quebracho and sodium silicate (Na 2 SiO 3 ) to …
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For fluorite ores, fatty acid and sodium silicate are frequently used as a collector and depressant, respectively [19], [20], [21]. Innovations and combinations of various additives comprise a significant share of the advanced investigations in fluorite flotation [22], [23], [24]. In some situations, effective flotation could be realized with ...
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Optimal fluorspar flotation was achieved under the following conditions: 3.6 g/kg of sodium oleate as the collector, 2 g/kg of sodium silicate as the pH modifier and depressant, a conditioning ...
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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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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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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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The recovery of scheelite from calcium-bearing carbonate ores by flotation is challenging due to its low separation efficiency. This study investigated the effect of pentasodium diethylenetriaminepentaacetate (PD) on the surface properties of scheelite and fluorite. For this purpose, we performed micro-flotation tests and carried …
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The dosage of sodium silicate should be controlled properly; a small amount has activation to the fluorite, but inhibition function is not enough; excessive inhibits fluorite. Sometimes in order to increase the inhibitory effect of sodium silicate on quartz, some multivalent metal ions will be add.
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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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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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Collector 733, a sodium soap (C 12 – 16 COONa) is widely used industrially for scheelite flotation. Low selectivity of 733 collector is always observed. In this study, a collector mixture of 733 and MES (sodium fatty acid methyl ester sulfonate) demonstrated a high selectivity for the flotation of scheelite from calcite and fluorite.
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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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The amount of sodium silicate is critical, i.e., a small amount can active …
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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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A flotation recovery method of silicon from metallurgical-grade silicon …
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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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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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on flotation of scheelite and fluorite using sodium oleate as collector, Separation Science and Technology, DOI: 10.1080/01496395.2019.1634734 To link to this article: https://doi.or g/10.1080 ...
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Download Citation | Combined inhibitors of Fe3+, Cu2+ or Al3+ and sodium silicate on the flotation of fluorite and quartz | Fluorite ore, as an essential raw material in the fluorinated chemical ...
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DOI: 10.1016/J.POWTEC.2019.04.071 Corpus ID: 155621200; Investigation of the depressants involved in the selective flotation of scheelite from apatite, fluorite, and calcium silicates: Focus on the sodium silicate/sodium carbonate system
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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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In the flotation of semi-soluble minerals such as calcite and fluorite, Ca2+ is one of the common dissolved components influencing the collector adsorption behaviors on the mineral surfaces. However, there is very limited research focusing on how the dissolved Ca2+ affects the separation of fluorite and calcite. In the study, with sodium oleate …
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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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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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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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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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The most common process for enhancing the quality of fluorite ores is the …
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In this work, we investigated the solution chemistry of sodium silicate and the flotation behavior of fluorite at different pH values in both the presence and absence of sodium silicate to activate the flotation of fluorite inhibited by sodium silicate.
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Semantic Scholar extracted view of "Activation mechanisms of sodium silicate-inhibited fluorite in flotation under neutral and slightly alkaline conditions" by Saizhen Jin et al. ... During the flotation separation process of bastnaesite, it is difficult to separate bastnaesite from fluorite effectively. In this present study, ...
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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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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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