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Fluorite is an important strategic mineral. In general, fluorite ores will contain a certain amount of calcite gangue mineral. Thus, they need to be separated from each other. For an economic separation, a reverse flotation process is used to float calcite gangue from fluorite. However, little information on the separation is available. In this …
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In order to improve the scheelite flotation with sodium oleate (NaOL), the effect of a non-ionic polyoxyethylene ether (JFC-5) on the floatability of scheelite was investigated through flotation experiments at 10 °C, compared with 60 mg/L NaOL alone, the recovery of scheelite is improved from 22% to 85% in the presence of JFC-5 with a …
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The bastnaesite, fluorite, and barite samples were derived from the Maoniuping Rare Earth Mine in MianNing county in Sichuan province, Tongliang in Chongqing city, and Xinhuang in Hunan province, China, respectively. ... Overall, this study developed a kind of mixed collector for bastnaesite flotation, the synergistic effect and …
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To obtain the high-quality fluorite concentrate, bulk flotation is generally used to suppress barite and then separate the fluorite. In bulk flotation, oleic acid is used as a collector and water glass is used as an inhibitor. The flotation is …
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Various reagents suitable for scheelite flotation (collectors and depressants, mostly) are reviewed in the present work, with a strong focus on the separation of scheelite from calcium salts, namely, fluorite, apatite, and calcite, which generally represent significant amounts in tungsten skarns.
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The closed-circuit flotation of actual ore using mixed collector obtained scheelite concentrate of 61.09% WO3 grade with WO3 recovery of 89.49%. ... Then, the selective adsorption mechanism of mixed collector on scheelite, fluorite and calcite were studied by ultraviolet–visible spectroscopy (UV–Vis) adsorption and Local …
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Collectors serve as essential flotation reagents that enhance the surface hydrophobicity of target minerals. A novel collector, N-hydroxy-9-octadecenamide (N–OH-9-ODA), was synthesised in this study. N–OH-9-ODA exhibits superior selectivity compared to the traditional collector oleic acid in the flotation separation of bastnaesite and fluorite.
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Single mineral flotation. Using 0.36 mM BABP as a collector, single mineral flotation of fluorite and scheelite was conducted as a function of pH. The results presented in Fig. 1 show that the fluorite floated well with a recovery greater than 95% being obtained over a wide pH range from 6 to 10.
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Reverse flotation desilication is an indispensable step for obtaining high-grade fluorapatite. In this work, dodecyltrimethylammonium bromide (DTAB) is recommended as an efficient collector for the reverse flotation separation of quartz from fluorapatite. Its collectivity for quartz and selectivity for fluorapatite were also …
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Abstract Collector OA, oleic acid, is widely used industrially for fluorite flotation. Low selectivity, dispersibility and collecting capability of the OA collector are always observed. ... When only OA was used as a collector, the fluorite and dolomite recovery were, at maximum, 85.66 % and 83.15 %, respectively, at an OA concentration …
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Micro-flotation experiments indicated that the flotation recovery of fluorite is 88.72% after fluoride ion treatment, that is, approximately fourfold with respect to that without fluoride ion modification. ... (CaF 2 ≥ 97%) from mixed minerals, and fatty acid collectors are common collectors for the flotation of calcium minerals [7,8,9 ...
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Oleoyl sarcosine is used as a selective collector both in the flotation of fluorite in calcitic gangue [52] and of scheelite in siliceous gangue [19], [53]. Its selectivity for scheelite against other calcium-bearing minerals is limited [53] but still greater than sodium oleate [54].
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Silica gel. Silica gel has been shown to be a good depressant for gangue minerals barite, fluorite and calcite in the flotation of a Chinese rare earth deposit [ 128 ]. The depressing action was explained as an active siliceous colloid which selectively adsorbs to gangue minerals rendering them hydrophilic [ 128 ].
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In this study, OBHA was used as collector for the flotation separation of fluorite and calcite. Under a natural slurry pH environment, the recovery of fluorite …
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A series of flotation results demonstrate that the collector mixture of 733 and MES at a mass ratio of 4:1 achieves the best flotation separation performance, as shown in Fig. 3. Scheelite has a favorable recovery of 70%. However, the recovery of calcite and fluorite are 39% and 1%, respectively.
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The flotation separation of fluorite from calcite can be achieved by using a mixed collector (NaOL:DDA = 9:1) and salted water glass as depressant. The adsorption mechanisms of the mixed collector were studied by FTIR analysis, wettability analysis, fluorescence spectrum analysis and AFM.
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This investigation aims to demonstrate the effects of hydrophobic tails on the affinity and relevant flotation response of sulfonate-based collectors for fluorite. For this purpose, a series of alkyl …
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Whereas a metallurgical-grade fluorite is obtained by gravity and mag- netic separation methods, flotation is the major concentration process for the production of acid-grade …
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Flotation. Reverse Flotation Separation of Fluorite from Calcite: A Novel Reagent Scheme. 8 (8):313. License. CC BY 4.0. …
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Flotation tests showed that the best results in terms of fluorite metallurgical recovery were 82.8% and 87.9% for new collectors DP-I and DP-II respectively, for a dosage of 100 g/t and using pneumatic …
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Fluorite (calcium fluoride—CaF2), also known as fluorspar, is an industrial mineral used in metallurgy, hydrofluoric acid production, and ceramics manufacturing. Based on the results from a previous study, a low-grade fluorspar by-product (20.0% CaF2) originating from the exploitation of a rare earth carbonatite deposit can be improved to …
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There are few studies on sulfonic acid collectors used in scheelite flotation, but they have been extensively studied in fluorite flotation and showed good flotation performance [60,61,62,63]. Sulfonic acid collectors are often used in combination with fatty acid collectors, or sulfonic acid groups are introduced into carboxylic acid collectors.
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In this study, two new collectors for fluorite flotation DP-OMC-1033 (DP-I) and DP-OMC-1234 (DP-II) were tested and compared with oleic acid (OA), sodium oleate (SO) and potassium oleate (PO). According to fluorite grade and fluorite metallurgical recovery, the effect of each collector was determined, both in mechanical and pneumatic …
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Andiroba oil proved to be promising as an apatite collector in flotation systems with carbonate gangue, being an environmentally attractive alternative for the phosphate industry. Graphical abstract. ... Slow-release of fluorite and its effect on flotation separation of magnesite from calcite. Minerals Engineering, Volume 185, 2022, Article …
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The mechanism of phthalic acid, a dicarboxylic acid collector, in flotation separation of fluorite and rare earth (RE) was studied in this paper. The experimental data of flotation show that phthalic acid, as the collector, can realize highly efficient separation of fluorite and rare earth under weakly acidic conditions.
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Thiophosphate compounds have attracted much attention in coordination chemistry, but their deep adsorption mechanism remains underexplored as flotation collectors. The flotation performance and adsorption mechanism of a novel (dibutoxy-thiophosphorylsulfanyl)-acetic acid (CDDP) chelating collector on azurite surfaces were …
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The flotation behavior of fluorite at a high pH (>12) is distinctly different from that at a conventional flotation pH range of 8–9, and efficient calcite/fluorite separation could be achieved by using a low …
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Mechanism of collector adsorption in fluorite flotation. DOI: Authors: A. Uçar. Dumlupinar Üniversitesi. Hüseyin ------/ Ozdag. …
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Therefore, in this study, Pb (NO 3) 2, benzohydroxamic acid, and sodium oleate with specific combination (Pb-BHA-NaOL) were firstly used to form a novel collector to selectively separate scheelite and calcite. The flotation results of single and binary mixed minerals showed that the mixture of Pb, BHA and NaOL (molar ratio 6:6:1) exhibited ...
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1. Introduction. Scheelite (CaWO 4) is a typical tungstate mineral and usually co-exists with other calcium-containing minerals, such as calcite (CaCO 3) and fluorite (CaF 2) in deposit.By now, flotation is the most commonly used technique to separate scheelite from calcite and fluorite. Long chain carboxylic acids, such as fatty acids and their …
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