The types and dosage of dispersant on the improvement of fluorite flotation were investigated; when the sodium polyacrylate (SPA) was used as the dispersant and its addition is 0.5%, the ...
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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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Collector type and pulp pH play an important role in the lead–zinc ore flotation process. In the current study, the effect of pulp pH and the collector type parameters on the galena and ...
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Multiple flotation stages are usually required. The first step is to enrich fluorite and barite through mixed flotation in which sodium oleate and sodium silicate are selected as the collector and ...
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In this study, a new flotation approach, a low-alkaline and non-desliming process, was introduced for improving lead and zinc recoveries, lowering production cost and reducing environmental pollution.Lab-scale experiments results show that the new process contributed to the flotation of the complex mixed sulfide-oxide lead and zinc …
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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. …
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Beneventi et al. investigated the effect of froth and pulp retention time in a laboratory flotation column on the flotation de-inking efficiency and reported that increasing retention time from 5 to 20 s was in favor of the drainage of water and hydrophilic particles, which lowered flotation recovery by 10%. For a given flotation …
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In addition, the flotation results of the tailings from Jiangxi containing fluorite and calcite, indicated that the grade and recovery of fluorite increased from 87.18% and 40.99% for 0 days to 93 ...
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Effect of retention time on fluorite grades and recoveries with varying feed injection location . . . . . . . . . 15 ... and the recovery scheme was simplifIed by removal of several stages of flotation in the fluorite and silicate flotation steps. lChemical engineer. 2Physical science technician. 3Reseal'ch supervisor (now Assistant Research ...
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Fatty acids are prevailing as they allow flotation of many non-sulfide minerals while being relatively friendly to the environment [58]. As a common derive of fatty acid, sodium oleate (NaOl) is ...
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The industrial tests were performed at Hunan Xinyuan Corporation's Fluorite Flotation Plant. In these tests, mud was removed early in the process by fluorite desliming rougher flotation. The old system used sodium silicate as a depressant during flotation. The flotation flowsheet of the industrial tests is described in Fig. 7. The new …
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The authors conclude that two-stage flotation using dextrin to remove SiO ... a conditioning time of 35 min, a flotation time of 7 min, and a solid-to-liquid ratio (S/L) of the pulp of 5% ...
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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).
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A flotation column was used for this study, as the flotation column can produce higher grade concentrates compared to conventional flotation cells, while requiring lower flotation time and stages, particularly for fine particles (< 75 μm) [29, 30]. The performance of the flotation not only includes the grade recovery of fluorspar but also …
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The beneficiation of low-grade oxidized lead and zinc ore from the Lanping mine has attracted extensive interest in the mineral processing field due to the extremely rich resource reserves and the challenge in lead and zinc recovery. This study's objective is to analyze the process mineralogy characteristics and to conduct the flotation …
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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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Six hundred grams of the samples was ground with a wet ball mill to achieve an 82% passing of 74 μm. Flotation experiments were carried out using a self-aerated XFD-63 flotation machine (Jilin Exploring Machinery Plant, Jilin, China) with a 1.5 L volume for rougher-scavenger flotation and 0.5 L for cleaner flotation, and the impeller speed …
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From these plots it may be clearly seen that the maximum flotation recovery of apatite and fluorite occurs at about the intermediate pH range with rela- tively low concentrations of sodium oleate (2 X 10-5 M for fluorite and 7 X 10-5 M for apatite), whereas the flotation of calcite increases with increase in pH and higher concentrations …
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column flotation was only 3 to 6 min compared with a 15-min retention time required for conventional three-stage flotation. Comparison of flotation response …
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Decyl-bishydroxamic acid (DCBHA) was synthesized and innovatively used as a collector for fluorite-calcite flotation separation.. DCBHA exhibited superior selectivity compared to BHA and OHA, yielded a concentrate grade of up to 70.99% with a recovery of 76.24%. at optimal conditions.. EDDA chemisorbed on bastnaesite surface by forming a …
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CFCs are used industrially less than the mechanical cells mainly located in cleaning and re-cleaning stages. At this flotation stage, they significantly improve the grade by the counter-current fluid flow of air bubbles and pulp with a relatively long slurry retention time and the massive amount of wash water (Wills and Finch, 2015).
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The flotation performances of styrene phosphonic acid (SPA) to synthetic (Ce,La)2O3 (REO), calcium fluorite (CaF2) and fluorapatite (Ca5F(PO4)3) were investigated by flotation tests, flotation of ...
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Longer residence time: Gold is a naturally slow floating element and maximum recovery can only be achieved when given a longer retention time, particularly for charged water soluble collectors (e.g. xanthate, DTP) (Klimpel, 1997). 2.2. Uranium. Uranium (U) occurs in two oxidation states, tetravalent (U 4+) and hexavalent (U 6+). Uranium ...
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Fluorite is a non-renewable mineral that is used for anhydrous hydrofluoric acid and aluminum fluoride purposes. In China, along with the excellent fluorite resource, which is over-exploited, many off-specification fluorites (CaF 2 > 93, under 97%; SiO 2 > 1.5%) are produced. Improving the grade of fluorite instead of costly technologies of the …
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Through the flotation process of primary roughing, primary sweeping and four-stage selection of fluorite ore, a qualified fluorite concentrate with CaF 2 grade of …
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Conducting micro-flotation experiments encompassing single minerals and artificially mixed minerals, we systematically investigate the flotation performance of DCBHA in fluorite flotation systems. It was observed that DCBHA exhibited commendable collective and selective ability compared to BHA and OHA, yielded a concentrate grade …
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Fluorite (CaF2), as an important strategic mineral source, is usually separated from calcite by the common froth flotation method, but this separation is still not selective enough. The development of a selective collector and/or depressant is the key to achieving high selective separation. 1-Hydroxyethylidene-1,1-diphosphonic acid (HEDP …
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Flotation experiments show that calcium oleate has a better flotation performance on fluorite than sodium oleate, especially at low concentrations, and flotation separation of fluorite and calcite ...
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Pneumatic flotation cells Slurry retention time ... the same row/bank or different flotation stages (Govender et al., 2013). ... (REE) embedded in carbonate, fluorocarbonate, phosphate, and fluorite
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Fluorite rougher column plug flow retention times based on slurry feed rate and collection zone volume (column volume between feed injection port and air sparger) …
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