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The optimum particle size range for apatite flotation is from 37 μm to 105 μm [33]. Cationic flotation test conducted by Guo and Li showed that the P2O5 grade and recovery of 45-74 μm fraction ...
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The application of nanobubbles through flotation of coarse apatite tailings evidently improved the process' metallurgical responses compared to flotation by conventional bubbles only. The results indicated that nanobubble flotation of the as-received apatite tailings (−850 μm) was an attractive option that can minimize the CO 2 …
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By the combination of the processes of classification, preliminary flotation, re-grinding and cleaning in the flotation column, an apatite concentrate of 30.68% P2O5 can be obtained with the total recovery of 37.76% from the initial tailing of 7.56% P2O5. See more
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Comparison between deep-cleaning and conventional flotation results denoted that, at approximately same concentrate ash, its yield by deep-cleaning was 46.06 percent point higher, and at similar ...
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The results indicated that at the optimum conditions of flotation, a concentrate of 30% P 2 O 5 with a recovery of a proximately 75% was obtained from a feed of particle size less than 250 microns and 10.8% P 2 ... the main role of sodium silicate in apatite flotation is to depress the silica particles by the precipitation of sodium silicate ...
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Considering the flowsheet with the desliming in the hydrocyclones (40 mm in diameter) in two stages, followed by apatite flotation in the column, a final concentrate of 35.6% P 2 O 5 was obtained, with main impurities of Fe 2 O 3 and SiO 2 around 4.0% and 5.1%, respectively, using only rougher flotation.
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Abstract A brief literature review on flotation of calcium-bearing minerals is given. It is found that flotation activity of a collector is connected with physisorption of the collector in particle–bubble attachment. The tests prove that physisorption decrease reduces recovery and increases the useful component content /yield ratio in the …
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In this work, selective flotation separation of microfine apatite and chlorite was achieved by using sodium oleate (NaOL) as a collector with a low dosage of acidified sodium silicate (ASS) as a depressant. The optimum ratio of sodium silicate to sulfuric acid for ASS was 5:3, and a good separation effect was also achieved in the mixed ore …
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The effects of the key variables on the selective flotation of Mt. Weld phosphate ore were studied with the aim of optimizing the flotation process to yield a concentrate of the following specifications: >36% P 2 O 5, <3% Fe 2 O 3, P 2 O 5 (Fe 2 O 3 + Al 2 O 3) >10 at a P 2 O 5 recovery of >70%. The main difficulty was to reduce the …
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The reverse flotation process of phosphorite ores realized the apatite concentrate with a P 2 O 5 grade of 28.06 wt % and recovery of 81.92%, and the grade of MgO in the concentrate reduced from 10.87 to 0.75 wt %.
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In this study, enrichment possibility of apatite-bearing iron ore sample was investigated to obtain iron and phosphate concentrate, separately. It was determined that the raw ore contains 35.75% ...
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After 4 min of flotation, the apatite concentrate was obtained. Recovery of the concentrate, which was calculated by Eq. (1) was treated as responses to evaluate the flotation indexes (1) R = m 1 m 0 × 100 % where R is the concentrate recovery (%); m 1 is the weight of froth product (g), and m o is the weight of apatite raw ore (g).
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Flotation results demonstrated that HPMA displayed an intense depressing impact on the dolomite flotation while affected slightly the apatite flotation. Surface wettability analysis indicated that the selective adsorption of HPMA at the dolomite/water interface declined significantly the dolomite hydrophobicity even in the case of sodium …
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Flotation tests further affirmed COC's adequacy for carbonate flotation (with phosphoric acid as fluorapatite depressant). COC was able to outperform the two tested conventional collectors. At acidic pH conditions, COC succeeded in recovering a great quality carbonate concentrate with minimal apatite losses. CRediT authorship …
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The apatite treated with only NaOl demonstrated excellent flotation performance in the pH range of 7.51–11.54. Similar to the apatite, the dolomite also demonstrated a good floatability (more than 80%) at pH 6.95–11.49 without P (AA-AMPS), which was mainly attributed to the excellent ability of NaOl to collect dolomite. In this . …
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The results showed that in the preliminary flotation process, apatite concentrate with a content of up to 23.50% P 2 O 5 was obtained with a recovery of 77.92%. 3.3 Column Flotation. Column flotation is applied to reclean the preliminary flotation concentrate after its regrinding to improve the quality. The column flotation device is fitted ...
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The results of the artificial apatite-dolomite mixture flotation revealed that the grade and recovery of P 2 O 5 were 34.89 % and 84.93 % in the obtained apatite concentrate with 15 mg/L DMNS and 2 × 10 −4 mol/L NaOl. The adsorption and zeta potential measurements indicated a weak interaction of DMNS with apatite surface can not prevent the ...
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NEW SYNTHETIC COLLECTOR FOR THE DIRECT FLOTATION OF APATITE FROM COMPLEX ORE. Conference: Brazilian Meeting on Mineral Processing and Extractive Metalurgy. Authors: Kelly …
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The results of single mineral flotation experiments showed that GA performed a considerable selective depression on calcite at pH 7–11, and a concentrate with apatite recovery of 88.84% and P 2 O 5 grade of 26.86% was obtained in the apatite-calcite binary mixed mineral flotation experiment. Therefore, GA can be used as a …
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Froth flotation is a commonly utilized beneficiation technique for effectively separating apatite from other gangue minerals, such as calcite. It is difficult to achieve good separation with fatty acid collectors due to their similar interactions with apatite and calcite. In this work, sodium N-lauroyl sarcosinate (SNLS) was used as the collector for the …
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In this work, a novel membrane distributor in a flotation column is developed to generate microbubbles for the flotation of fine apatite particles. A large number of …
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Furthermore, another locked cycle flotation test showed that a 0.82% MgO content in the final apatite concentrate can be achieved with an apatite recovery of 75.6% at a P 2 O 5 grade of 36.76%, and a ratio CaO/P 2 O 5 = 1.33. The obtained concentrate in this investigation under the optimum conditions is the highest in both apatite recovery and ...
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Valorization of apatite mining flotation residues by the manufacture of artificial aggregates - ScienceDirect. Resources, Conservation and Recycling. Volume …
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In an open circuit scheelite flotation, they obtained a concentrate grade of 65.76% WO 3 for a recovery of 66.04% and a feed grade of 0.57% with this mixture, which ends up being cheaper and ... This effect has been used in apatite flotation, as the addition of CO 2 results in the depression of apatite and favors calcite flotation [84], even ...
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Variations in composition and zoning were found in apatite grains in the concentrate and waste from flotation. This information is relevant when it comes to establishing why apparently similar apatite behave in a different way during froth flotation, the most common process applied in the concentration of the igneous apatite ore.
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ABSTRACT. Apatite (Ca 10 (PO 4) 6 F 2) is the most important phosphate mineral, and flotation is the main beneficiation method to separate apatite from its major gangue mineral calcite (CaCO 3).Till date, fatty acids and their salts have been widely used as collectors in the apatite/calcite flotation separation due to their low cost and strong …
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The ore is composed predominantly by apatite (84% in weight basis) plus silicates (16%). In order to treat the ore from beds 1-5, a suitable standard mineral processing circuit (composed of scrubbing, screening, attrition and desliming) started its operation in 2010, yielding 3.9 Mt/y of concentrate assaying 30% of P2O5.
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SEM-EDS images of flotation concentrate (i.e. apatite conc.). As seen in the XRD pattern of flotation tailing in Fig. 8, the peak intensities of silicate minerals dramatically increased. The highest peak by appearing at around 26.5°2θ is the typical peak of quartz. XRD results emphasize that the tailing is mostly composed of gangue minerals ...
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Flotation is the most widely applied technique for processing of phosphate rocks, using mainly fatty acids and their salts as collectors. In partnership with BASF Mining Solutions, a new collector …
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The flotation experiments of mixed minerals are taken to confirm the inhibiting effect of released F − on the recovery and the grade of apatite in concentrate. Fig. 5 shows the results of flotation separation of apatite and calcite without the addition of sodium fluoride and fluorite.
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Introduction. Calcite is one of the most abundant simple salts in the earth's surface and in sedimentary rocks; it occurs in the form of armours and skeletal frames of marine creatures. It is the prime constituent of limestone, chalk etc. In igneous rocks, calcites are present in the form of fine-to-coarse grains.
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In each flotation experiment, both concentrate and tailing were drained from the flotation machine and oven-dried at 110 ± 0.5 °C for 24 h, weighed, and their chemical composition determined. The quality of the floated product was evaluated based on the content of P 2 O 5 grade, while the flotation process productivity was quantified …
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Combinations of two different types of collectors, reagent dosages, air flow rate, recycle flow rate and conditioning times are analyzed from experiments …
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An apatite concentrate with a P 2 O 5 grade of 38.53% and a MgO grade of 0.85% was obtained via direct flotation. This first successful utilization of P (AA-AMPS) as an eco-friendly and high-performance dolomite depressant achieved the efficient recovery of apatite from dolomite-bearing phosphate ore.
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In the present study apatite concentrate originating from iron ore beneficiation done by LKAB in Kiruna, Sweden, is explored as a possible source for REEs. The composition and distribution of the REEs within the concentrates are studied using ICP-MS, XRD and SEM-EDS/EPMA, as well as the melting point and heat of fusion using DTA-TGA-MS. ...
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A part of underflow in the flotation column is returned back to the feed bucket to realize the cyclic operation of apatite flotation. The collected concentrate particles are filtered, dried and weighed. The mass fraction of P 2 O 5 in the concentrate, which is measured by the XRF, ...
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