The concern about enhancing the productivity of Salitre phosphate mines has led to an extensive research and development program on new reagents, aimed at the sustainable processing of the …
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 …
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.
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 ...
Rougher flotation yielded concentrate assaying 29.19% P2O5 with 90.29% recovery at the following flotation parameters: 2.6 cm/s superficial gas velocity, 20ppm frother dosage, 0.205 mM collector ...
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 ...
Flotation carbonates Air Apatite concentrate Froth Conditioning-50% solids-Collector(sulphosuccinate) LuprominFPA 711-Corn starch (depressant)-pH –9,5 -NaOH H2SO4 Calcite/dolomite. Two stage conditioning process. Carbondioxideapplyedin flotation. Bulk concentrate Apatite and carbonates
The bench-scale flotation experiments demonstrated that effective flotation separation of apatite from calcite can be achieved using HPMA as the depressant and sodium oleate (NaOl) as the collector. Under these experimental conditions, an apatite concentrate with P 2 O 5 grade of 36.21 ± 0.71% and recovery of 81.18 ± 1.84% was …
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 …
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 . …
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 %.
Four apatite-nepheline ore samples were used for studying flotation and frothing properties of collecting mixture components, namely, PhospholanPE-65 andBerol 511 reagents. The study results have ...
Froth flotation is a commonly utilized beneficiation technique for effectively separating apatite from other gangue minerals, such as calcite. It is difficult to achieve …
Titanium raw materials are widely used for the synthesis of various functional materials – sorbents of radionuclides and rare earth elements, various additives, filler pigments, etc. Since most of titanium concentrates are imported, in line with the
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.
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 …
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 ...
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 …
Apatite flotation with polyoxyethylene cetyl ether with 2 EO groups is enhanced. • Feed containing >85 % particles passing 36 µm can be successfully treated. • The process recovers 45.5 % P 2 O 5 to a concentrate grade of …
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).
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 ...
Valorization of apatite mining flotation residues by the manufacture of artificial aggregates - ScienceDirect. Resources, Conservation and Recycling. Volume …
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
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 ...
To concentrate phosphate from beds 67, however, it is necessary to carry out further cationic reverse flotation of silicates, at neutral pH, to yield a concentrate, which meets market specification. The new process was developed in laboratory scale by a collaborative program conducted between Vale S.A. and the University of Sao Paulo-Brazil.
Froth flotation is the most important concentration method for beneficiating phosphate ores [2], [3]. In this process, most collectors used worldwide are fatty acids …
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 …
In this study, there is 1.42% P2O5 in the P-containing V-Ti magnetite tailings in Miyi Region of China, with the valuable minerals mainly including apatite, and aluminosilicate minerals as the main gangue components. The direction flotation process was used to recover phosphorous from the low-grade phosphorous-bearing V-Ti …
Combinations of two different types of collectors, reagent dosages, air flow rate, recycle flow rate and conditioning times are analyzed from experiments …
The study of the flotation mechanism revealed that, in the presence of starch and the lab-made fatty acid, there was both physical absorption and chemisorption occurring on the surfaces of apatite. ... and the iron grade of the concentrate can reach 58.72%. The phosphorus content in the final leaching residue can also be reduced from …
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, ...