In this paper, the carrier flotation method is used to comprehensively recover hematite, and the addition of coarse-grained magnetite can effectively improve the recovery rate of fine-grained …
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Hematite and quartz present in banded iron ore are intimately associated with one another and require fine grinding for the liberation of mineral particles. The influence of the thickness of bands on the liberation and flotation response of banded hematite quartzite (BHQ) ore is investigated. A computer program is developed to predict the liberation of banded iron …
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Magnetic and flotation studies of banded hematite quartzite (BHQ) ore for the production of pellet grade concentrate B. Das, B.K. Mishra, S. Prakash, S.K. Das, P.S.R. Reddy, and S.I. Angadi Institute of Minerals and Materials Technology, Council of Scientific & Industrial Research (CSIR), Bhubaneswar 751013, India
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Thus, the aim of this project was to assess the flotation performance when partially (beyond 10%) replacing excess amine collector with a commercial frother. Frothers have been generally acknowledged to be very important in terms of their role with respect to bubble size, and the stability and mobility of the froth phase [25].Though several types and classifications exist, …
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Selectivity index of monazite over hematite as a function of pulp pH at 1000 g/t sodium oleate. Dashed horizontal lines represent point where equal fractions of monazite and hematite report into flotation concentrate (SI = 1.0).
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A comparative study between the adsorption mechanisms of sodium co-silicate and conventional depressants for the reverse anionic hematite flotation February 2021 Separation Science and Technology ...
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The copper sulphide sample used in this work was a flotation concentrate from the chalcopyrite-bornite type of copper mineralization. The particle size of the mineral samples used in the study was less than 38 μm (d80). The concentrate primarily consisted of chalcopyrite, bornite, covellite, hematite and pyrite.
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The flotation tests found that the flotation recovery of fine hematite increased observably to 94.51% from 68.69% by adding 4 mg/L PAAS before NaOL at pulp pH 7.3; in the separation of mixed hematite and quartz, the separation efficiencies of fine hematite with and without the addition of the PAAS are 85.71% and 68.84%, respectively.
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This study introduces asynchronous flocculation into the flotation separation of ultrafine hematite, kaolinite, and chlorite, whereby asynchronous flocculation flotation, utilizing …
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Santos et al. [17] investigated HA as a hematite depressant in iron ore reverse flotation, finding that hematite recovery exceeded 90 % in the depressed concentrate, with Fe 2 O 3 content reaching 86.0 %. HA can serve as an alternative to starch in iron ore flotation.
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By implementing asynchronous flocculation flotation, the concentrate grade and recovery increased by 9.39% and 7.97%, achieving 59.73% and 84.82%, respectively. These results confirm that asynchronous flocculation with PAAS and PAC facilitates the flotation separation of ultrafine hematite from clay minerals.
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The effect of collector sodium oleate concentration on the flotation separation of quartz and hematite is shown in Fig. 1. The flotation recovery of hematite submerged in the flotation cell (concentrate) remained above 96% with sodium oleate concentration ranged from 2.5 to 70 mg/L, indicating that HM had a better depression performance on ...
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It is well known that Major global reserves of iron ores are associated with formations of magnetite-hematite ores of metamorphogenic origin ... Although, compared with regular process, electroflotation flotation obtained a concentrate with lower Fe content of 66.65% and higher SiO 2 content of 4.84%, and exhibited a little weaker efficiency of ...
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To obtain high-grade iron concentrate, sophisticated beneficiation processes are necessary. In practical applications, magnetic separation combined with flotation is typically …
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In this regard, a novel two-step flotation process was developed, in which siderite was concentrated in the first step direct flotation and the hematite concentrate was obtained in the second step ...
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The effects of siderite on reverse flotation of hematite were investigated using micro flotation, adsorption tests, and Fourier transform infrared spectroscopy. ... Two-step flotation recovery of iron concentrate from Donganshan carbonaceous iron ore, J. Cent. South Univ. Technol., 17(2010), No. 4, p. 750. Article Google Scholar
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In China, hematite flotation is often preceded by magnetic separation that upgrades run-of-mine hematite ore from about 30% Fe to around 45% Fe [12, 13]. ... The mechanisms that are responsible for the observed benefits of nanobubbles to the flotation concentrate grade and/or recovery are discussed below.
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Dodecyl amine acetate was used as a collector to float siliceous gangue while depressing hematite using the freshly synthesized caustic starch as a depressant. The separation efficiency of the flotation was evaluated by …
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In another work by the authors (Tao et al., 2020), it has been shown that effects of reagent (collector, depressant and lime) dosage on flotation behavior is essentially independent of the presence of nanobubbles and use of nanobubbles enhanced the reverse anionic flotation of hematite, significantly improving concentrate Fe recovery at all ...
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Magnetic separation and flotation of BHQ ore could enrich the feed with 39% Fe to a concentrate having 65.3% Fe at 61.9% iron recovery ... The hematite concentrate was prepared by grinding the feed sample to a particle size below 100 µm and subjecting it to two-stage Wet High-Intensity Magnetic Separation (WHIMS), supplied by Box Mag Rapid ...
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In order to enhance control of hematite reverse flotation systems, we investigated desiliconization mechanism of surface nanobubbles (NBs) in reverse flotation of micro-fine …
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In hematite or quartz flotation using DDA as a collector, the active ion C 12 H 28 N + would be enriched on the surface of hematite and quartz, forming a layer of positively charged surface, meanwhile the counter ions (CH 3 COO −) were distributed at the interface, forming a surface double electric layer. When the liquid film became thinner ...
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Analysis of the current technical solutions for the processing of iron ores showed that the high-grade ores are directly exposed to metallurgical processing; by comparison, low-grade ores, depending on the mineralogical and material composition, are directed to beneficiation including gravitational, magnetic, and flotation processes or their combination. …
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Direct hematite flotation is a relatively simple process, convenient to operate, and offers a low production cost [10]. ... If the magnetic separation concentrate is capable of achieving efficient direct flotation, the low-cost and high-efficiency magnetic separation process can be employed to obtain qualified iron concentrate for weak magnetic ...
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Sample characterization The hematite flotation feed sample was characterized qualitatively for its mineralogical compositions using the coupling X ray diffraction (XRD) diffractometer (Bruker D8 XRD) -5- Journal Pre-proof operating at 40 kV, 44 mA and 2o/min scan rate and the XRD pattern results are shown in Figure 1, which shows that the major ...
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Surface tension and batch flotation experimental results indicated for the first time that replacing Flotigam EDA, an etheramine collector by more than 10% improved the flotation performance …
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This indicated that PEO and DDA could be an ideal combination as the flocculant and collector for quartz. Indeed as Fig. 5 shows, the addition of 50 g/t PEO increased quartz flotation so that the hematite concentrate grade was increased by 2.3 percentage points, and the hematite recovery was also increased by 2.9 percentage points.
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Reverse flotation is a key process for the purification of iron concentrate after magnetic separation [2,3,4]. Anshan-type iron ores are typically low-grade, with magnetite and hematite as the primary iron minerals, and minor occurrences of martite and semi-martite.
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Considering comprehensively, the optimal conditions for the flocculation and sedimentation effect of fine-grained hematite concentrate in this experiment are: the molecular …
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Currently, many attempts have been taken to purify the hematite concentrate, such as different flotation routes, addition of surfactant, and desliming, etc. [7][8][9] [10] [11][12][13][14][15 ...
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