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A SLon full-scale continuous centrifugal concentrator was used to reconcentrate hematite from a high gradient magnetic separation concentrate to study the effect of impact angle, concentrate mass ...
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The tailings material used for the present investigation was obtained from the discarding stream of iron tailings at Hainan Iron and Steel Company in southernmost China. The tailings is 28.76% Fe, and hematite is the dominant mineral accounting for more than 98% of the magnetic miner-als. The primary gangue minerals in the material are quartz,
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A new approach for SMR was developed for efficient iron recovery from iron ore tailings. • An iron concentrate with 58.67% Fe at an iron recovery of 57.82% was obtained. • Hematite and siderite were transformed into magnetite during the SMR process. • The SMR reactor showed good performances in terms of operation, control and product.
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Hao et al. studied the siderite–hematite–quartz flotation system: Laboratory-scale reverse flotation tests resulted in a concentrate with a total iron (TFe) content of 47.8% and recovery of 48.2% from an ore containing 31.2% TFe. Application of a two-step flotation produced siderite (32.5% TFe at a recovery of 15.1%) and hematite (53.7% TFe ...
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The current centrifugal concentrators do not continuously concentrate heavy minerals of large mass weight—for example, in the processing of iron oxides. A cyclone centrifugal separator is a new type of beneficiation equipment that has been developed on the basis of the principles of centrifugal separation and hydrocyclones. In this study, a …
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Due to the weak magnetism of hematite and rare earth minerals, magnetic separation has low efficiency. ... magnetic concentrate, and magnetic tailings were studied by X-ray diffraction, iron ...
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Pulsating high-gradient magnetic separation (PHGMS) of fine hematite from tailings was studied using a pilot PHGMS separator to investigate the possibility of its application in industry. The results of this investigation indicate that PHGMS is effective for recovering fine hematite from the tailings and greatly improved the separation …
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However, there is still a portion of ilmenite and hematite embedded in gangue such as anorthite, diopside, and serpentite. ... a concentrate with TiO2 grade of 47.31% and total Fe (TFe) grade of 35.44% was produced; TiO2 and TFe had recovery rates of 57.71% and 28.23%, respectively. ... the roughing tailings yield is unimpressive, …
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Download scientific diagram | Satellite images of the tailings dump. from publication: Recovery of magnetite-hematite concentrate from iron ore tailings | The research is aimed at study of the ...
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The research is aimed at study of the probable recovery of iron from the tailings of the Olcon mining company located in the north-western Arctic zone of Russia. Material composition of a sample from a tailings dump was analysed. The authors have ... Recovery of magnetite-hematite concentrate from iron ore tailings.
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In this paper, the properties, mineral magnetic modification, and beneficiation of tailings from the central mining and processing plant in Kryvyi Rih, Ukraine, have been studied. Samples were investigated by X-ray diffraction, X-ray fluorescence, microscopy, and magnetization measurements. The beneficiation was conducted using …
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The hematite and siderite in tailings were transformed into magnetite with an average magnetic conversion rate of 86.46%. This innovative PSRM technology provides …
DetailsIt can be seen from Fig.2, it achieved an effective recovery for the fine magnetic hematite from tailings; as the magnetic induction increased, the iron recovery rapidly increased and then ...
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The chemical and physical properties of iron ore tailings are comprehensively examined in this review, and various beneficiation and metallurgical recovery techniques …
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Fired clay bricks prepared using hematite mine tailings were found to be achieving a strength of 12.65 to 20.35 MPa and water absorption was found to be in range of 16.5–17.9% when the firing temperatures were varied from 850–1050 °C . Optimum firing temperature was found to be 950–1000 °C . Production of geopolymer bricks using …
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Concentrate of the iron content of 67.09% and recovery of 85.93% was obtained. Abstract. ... Refractory iron minerals, such as hematite and limonite, were converted to magnetite in the suspension roasting. ... Iron ore tailings (IOTs), specifically those generated from iron ore beneficiation plants, present notable challenges to both …
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The study aimed to evaluate the separation performance of a full-scale continuous centrifugal concentrator in the reconcentration of fine hematite from high …
DetailsAccording to Abaka-Wood et al. [10], the gravity separation using shaking table of iron oxide silicate tailing with 26.2% of Fe provides a concentrate fraction of 49.3% Fe. The Abaka-Wood ...
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The main mineral phases in concentrate are magnetite (Fe 3 O 4) and (fluorite) CaF 2, fluorite in concentrate can be removed by grinding and reverse flotation. 26 Meanwhile, the main mineral phases in …
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The separation technology provides for production of iron ore concentrate with total iron content of 65.9% and recovers 91.0% of magnetite and 80.5% of hematite from the tailings containing 20.4% of total iron. The proposed technology will increase production of the concentrate at a dressing plant and reduce environmental impact.
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R=? Sc: 66.49 Fe R= 70% Fc = 66.8% R=2 Figure 1: Magnetite and hematite concentrator The final tailings assays 12% Fe while the final concentrate is at 66.8% Fe. 1.1 What is the iron recovery to the final concentrate if the feed grade is 35% Fe? 1.2. If 70% of the iron is recovered to the spiral concentrate at a grade of 66.4% Fe, what is the ...
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The authors have developed a separation production technology to recover magnetite-hematite concentrate from the tailings. A processing flowsheet includes magnetic separation, milling and gravity concentration methods.
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A concentrate with the highest iron grade of 61.79% and yield of 52.15% was produced from magnetic upgradation of the Rougher tailings, but magnetic upgradation of the total tailings produced a ...
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A semi-industry experiment of hydrogen-based mineral phase transformation for tailings is conducted with a roasting temperature of 500 °C, a reducing gas …
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The research is aimed at study of the probable recovery of iron from the tailings of the Olcon mining company located in the north-western Arctic zone of Russia. Material composition of a sample from a tailings dump was analysed. The authors have developed a separation production technology to recover magnetite-hematite concentrate from the …
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The results showed that an iron concentrate with iron grade of 63.04% and total iron recovery of 48.40% was obtained under the optimum roasting conditions: feeding rate of 111.70 kg/h, roasting temperature of 550°C, CO flow rate of 4.0 m 3 /h, and N 2 flow rate of 2.0 m 3 /h. The hematite and siderite in tailings were transformed into ...
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As shown in Fig. 5, the Fe grades of both the concentrate and tailings decreased with the increasing magnetic field. The yield of tailings also experienced a downward trend as the magnetic field increased, while the concentrate yield increased. The Fe phases of the concentrates were summarized in Table 5. Fe was mainly present …
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Hematite ore's magnetic characteristics were significantly impacted by magnetizing roasting. By selectively magnetizing roasting, hematite is transformed into magnetite. With an Fe grade of 65.25% at a recovery value of 72.5% in the concentrate, magnetic separation produced the greatest result for Fe.
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E. Darezereshki, A.K. Darban, M. Abdollahy, Synthesis of magnetite nanoparticles from iron ore tailings using a novel reduction-precipitation method, J. …
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The extremely small size of hematite segregations and thin intergrowths with quartz can lead to incomplete liberation of hematite …
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The results present that hematite, cordierite, and clintonite were enriched in Fe-rich tailings, while the SiO 2 phase mainly exists in quartz concentrate after S-HGMS. With the magnetic flow ratio increasing, the peak intensity of the SiO 2 phase increased and then decreased.
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Figure 1: Magnetite and hematite concentrator The final tailings assays 12% Fe while the final concentrate is at 66.8% Fe. 1.1 What is the iron recovery to the final concentrate if the feed grade is 35% Fe? 1.2.
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The proposed technology allows recovering hematite concentrate with a hematite iron content of 54.5% and recovery of 75.4% from current tailings containing 5.2% of hematite iron.
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It is easy to extract iron from this kind of haematite by using gravity separation and magnetic separation. Medium-grained hematite refers to iron ore with an embedded particle size between 0.02 and 2mm. This type of hematite is also relatively easy to select, mainly using gravity separation, magnetic separation and magnetic roasting.
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iron ore tailings (IOT) are generated, i.e., a coarse tailing, generated in the otation stage, consisting mainly of quartz, and a ne tailing, whose main components are usually quartz, hematite ...
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The authors have developed a separation production technology to recover magnetite-hematite concentrate from the tailings. A processing flowsheet includes …
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The concentrate and tailings were then dried, weighed, and utilized for analysis. ... The analysis revealed the presence of five phases in the tailings: goethite (FeOOH), hematite (Fe 2 O 3), quartz (SiO 2), illite (KAl 3 Si 3 O 10 (OH) 2), and kaolinite (Al 4 [Si 4 O 10](OH) 8). In these phases, the iron-containing mineral phases goethite …
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