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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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Fluorite flotation tests were carried out with the actual and new schemes. Fig. 2 showed the photographs of the tailing slurries after being settled for 96 h from the flotation test with the actual scheme and being settled for 2 h from the test with the new scheme. With the actual scheme (Fig. 2 a), 96 h of sedimentation did not produce …
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The authors provide insight into the problem of selective flotation of fluorite from carbonate-fluorite ores. It is found that oxyhydrate collectors used in combination with sodium fluoride provide rather high level of selectivity in fluoride flotation from poor high-carbonate ores and make it possible to eliminate high-temperature pulp treatment with …
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When looking at fluorite flotation with fatty acid collectors, the higher collector affinity is thought to be due to better templating effects at the fluorite surface [18]. With fatty acids as reagents for different chloroapatite (and/or fluoroapatite) flotation, the variance in flotation response has been attributed to differences in crystal ...
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1. Introduction. As a non-metallic mineral, fluorite is commonly appeared in industrial processes related to fluorine. It is often found with the emergence of other calcium and silicate minerals such as quartz, barite, and small amounts of pyrite [1,2].The flotation for the separation and purification of fluorite from these associated minerals is based on …
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Accordingly, a study for improving the fluorite flotation by dispersion processing has been carried out in this work. The fluorite flotation is performed by using oleic acid as the collector and quebracho as the depressant, which is a commonly used chemical scheme for fluorite flotation (Crozier, 1992, Raju and Prabhakar, 2000).
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Fluorite and calcite have been attracting research attention for a long time. This paper reports on an investigation of the use of diethylene triamine pentamethylphosphonic acid (DTPMPA) as a chelating inhibitor. DTPMPA was used as a chelating inhibitor to study the flotation, separation, and adsorption behaviors of …
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fluorite, common halide mineral, calcium fluoride (CaF 2), which is the principal fluorine mineral.It is usually quite pure, but as much as 20 percent yttrium or cerium may replace calcium.Fluorite occurs most commonly as a glassy, many-hued vein mineral and is often associated with lead and silver ores; it also occurs in cavities, in …
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Finally, the most widely-seen fluorite-flotation cases, including separations of fluorite from quartz, calcite, barite, and sulfide, are summarized individually. The present review sheds new light ...
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It has been shown that carrying out flotation of fluorite at pH higher than 9.5 leads to a greater flotation of carbonates, even when using different types of …
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In this study, to enhance the flotation of fine-grained fluorite, a strategy that combines simultaneous grinding and surface modification via ball-milling and controlled …
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The recovery of fluorite at flotation time t, to a first approximation is given by the following expression: (2) R t = R max 1 − e kt where R max is the maximum flotation recovery (%) at infinite time, k is the flotation rate constant (min −1), t is cumulative flotation time (min) and R(t) is the cumulative fluorite recovery (%) at ...
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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].
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During fluorite flotation, it is difficult to separate fluorite from calcite. Because they are both calcium-containing minerals and their surface properties are similar (Zhu et al., 2018). Therefore, many works have focused on the flotation separation of fluorite and calcium-containing gangue, particularly on effective collectors and selective ...
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In the presence of NaOl alone, the hydrophilic heads of the oleate species are chemisorbed on the bastnaesite surface, with the hydrophobic tails exposed to the solution, resulting in bastnaesite flotation. After treatment with the fluorite or barite supernatant, Ca 2+ or Ba 2+ from the fluorite or barite supernatant form …
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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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Fluorite (CaF 2) is by far the most important fluorine-bearing mineral phase in the Earth's crust.It is mostly used for manufacturing glass, cement, fillers, and hydrofluoric acid, and as a flux in steel-making in various industries [1,2,3].In order to obtain high grade fluorite raw materials (CaF 2 ≥ 97%), froth flotation has been the most …
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Therefore, the flotation of fluorite was selectively depressed by EDTA. The results show that EDTA was a promising depressant for fluorite gangue mineral in bastnäsite flotation.
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Flotation is the most efficient method to recover this type of fluorite. Fluorite and calcite contain Ca 2+. During flotation, the physical and chemical properties of the …
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In this study, curdlan was used as an efficient and eco-friendly calcite depressant for flotation of fluorite/calcite. Firstly, the structure and molecular weight of curdlan were characterized. Floatation test results showed that the flotation difference between fluorite and calcite was expanded by curdlan, thus enabling the flotation …
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The flotation separation of fluorite, barite and calcite with OEBA collector was performed. Based on the findings and discussion, we could draw the following conclusions. OEBA realized the efficient flotation separation of fluorite and barite from calcite at pH ∼ 9.0, and that of barite from fluorite at pH ∼ 11.0.
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In this paper, the flotation behavior of fluorite and gangue minerals was studied in the presence of five different collectors, DP_OMC_1033 (DP-I), …
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This article begins with introducing the deposits and unique physical and chemical properties of fluorite from the perspective of the crystal structure. It is followed by a systematic review of common reagents involved in fluorite flotation, including collectors, …
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Single mineral flotation tests were conducted in an XFG flotation machine at a spindle speed of 1700 rpm (Wang et al., 2016).The XFG machine configuration has been reported in our previous publication (Gao et al., 2016a).The mineral suspension was prepared by adding 2.0 g of single mineral or mixed binary mineral samples (1 g fluorite …
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The floatability of fluorite and calcite as a function of NaOl dosage at pH 8.0 is shown in Fig. 4.As seen in Fig. 4, flotation recoveries of fluorite and calcite significantly increased with increasing dosage of NaOl and remained constant at high collector concentration.The flotation recovery of both fluorite and calcite was over 90 % using …
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The flotation separation of fluorite from calcite using mixed collector (NaOL/DDA) and salted water glass was investigated using micro-flotation experiments. The adsorption mechanism of the mixed collector was uncovered by …
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The combination of Fe 2+ /Fe 3+ sulfate was used as selective depressant for the flotation separation of fluorite and calcite.. Ferrous and ferric species were in-situ generated on calcite surface to hinder the adsorption of NaOL. • Fluorite concentrate with CaF 2 grade of 80.29 % and recovery of 90.79 % was obtained using 1:1 mixed minerals.
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The flotation performance of 37–74 µm fluorite and different size fractions of barite (−10, 10–37, 37–74 µm) were conducted as a pH function using 1×10 −4 mol/L of collector NaOl and the results of which are presented in Fig. 1.As is shown, the flotation recoveries of fluorite were very high (~90%) across the entire studied pH range in the …
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The emulsified sodium vegetable oleate (ESVO) was prepared with low-cost vegetable oleate. Using ESVO as a collector, the flotation performance of fluorite had been investigated comparing with ...
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The fluorite flotation tests were carried according to the flowsheet shown in Fig. 1. The fluorite ore sample was first wet-ground to be 90% minus 200 meshes. Then, the slurry was conditioned, while 1000 g/ton water glass and a given amount of collector were added. Also, enough sodium carbonate was added to adjust the slurry to a pH of …
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