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The experimental results have shown that the FMS process is effective to recover hematite and limonite fines at a middle magnetic field intensity, greatly increased the separation efficiency, compared with the conventional magnetic separation at the same conditions.
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Magnetic separation of hematite using high intensity dry magnetic separation has been reported by Palasvirta (1959). He presented data for a coarse-grained specular hematite ore from Quebec ground to all passing 1.7 mm. Metallurgical results were exceptionally good, with concentrate grades as high as 67% Fe and iron …
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ABSTRACT Fe–P separation and the behaviors of Fe and P in separation process of high-phosphorus oolitic hematite ore from western Hubei province in China were studied. Various parameters, including reducing temperature and time, dosage of the pulverized coal, grinding fineness of magnetic separation feed, magnetic field intensity …
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Likewise, Tripathy et al. [12] was conducted the separation study on hematite fines by changing the roller speed with two unlike roller configurations having the maximum magnetic field value of 1. ...
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(1) Magnetization roasting and magnetic separation. Through the combined treatment of magnetization roasting and magnetic separation, hematite (Fe 2 O 3) is roasted in a reducing atmosphere at a certain temperature, and hematite is transformed into magnetite (Fe 3 O 4). The magnetism is greatly enhanced, which is easy to be …
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These are the three main process parameters which results in the selectivity of the paramagnetic minerals in dry high intensity induced roll magnetic separation. Most of …
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In this review article we provide a detailed overview of the traditional methods available for the preparation of hematite microparticles of different shapes, devoting special …
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The magnetic properties and the magnetic separation behavior of ilmenite, hematite and a rutile sample (LR Rutile) produced from Athabasca oil sands tailings were studied and the following conclusions can be drawn: 1. Oxidation roasting increased the magnetic susceptibility of ilmenite within the temperature range of 500–1000 °C.
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Given the low specific magnetic susceptibility of hematite, it must be enriched at high values of magnetic induction (1.0–1.2 T). Studies were carried out according to a scheme that included grinding to the size of P 80 = 96 μm and magnetic separation. The magnetic separation cycle included wet magnetic separation (WMS) …
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Given the low specific magnetic susceptibility of hematite, it must be enriched at high values of magnetic induction (1.0–1.2 T). Studies were carried out according to a scheme that included grinding to the size of P 80 = 96 μm and magnetic separation. The magnetic separation cycle included wet magnetic separation (WMS) …
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In addition, although the symbiosis relationship between hematite, limonite, and ilmenite is relatively simple, they have similar physical properties; thus, use of gravity, flotation, high-intensity magnetic, or electric separation technology is limited and can only obtain mixed concentrates, while the effective separation of titanium minerals ...
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Experimental results show that the iron concentrate with total iron grade of 61.78% and phosphorus content of 0.23% was obtained from an oolitic hematite ore containing 47.71% iron and 0.874% ...
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The highest cumulative recovery of monazite after the five-stage separation was 96.2 %. obtained from magnetic separation of mixture 3. A cumulative monazite recovery of 93.6% was obtained. from ...
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The mass recovery of the roasted samples in the 5%/95% gas mixtures at temperature <700 °C with low intensity magnetic separation was low. The mass recovery of the roasted samples at 700 and 750 °C by the magnetic separation was substantially increased, due to the transformation of goethite and hematite to maghemite. For the …
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2.2. The selective agglomeration separation experiment. The selective agglomeration of the fine hematite ore in aqueous suspensions was performed in an XFG flotation cell: 100 g of hematite ore samples were weighed and placed in the 500 ml flotation cell with a 20% slurry concentration, and subsequently stirred for 8 min with a …
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The effect of the CMS dosage on the flocculation magnetic separation index of fine hematite is shown in Fig. 2. As shown, the recovery of the concentrate increased rapidly from 59.97% to 65.08%, while the grade of the concentrate decreased with the CMS content increasing from 0 g/t to 400 g/t. Moreover, when the CMS dosage was …
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Low-intensity magnetic separation and pulsating high-gradient magnetic separation were, respectively, proposed to recover magnetite and limonite from the residue, and under the optimized ...
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Science. 2006. TLDR. Using the high specific surface area of Fe3O4 NCs that were 12 nanometers in diameter, the mass of waste associated with arsenic removal from water was reduced by orders of magnitude and the size dependence of magnetic separation permitted mixtures of 4- and 12-nanometer–sized Fe3Os to be separated by …
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The effect of particle size and magnetic susceptibility on wet high intensity magnetic separation was studied simultaneously. ... occurred in very low applied magnetic fields. Hematite—1 is a ...
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From the published literature, it is found that wet high-intensity magnetic separators are widely accepted in the mineral industry (Pradip, 1994, Jena et al., 2015, Seifelnassr et al., 2013, Filippov et al., 2014), but the application of dry magnetic separation for hematite beneficiation is not adequately developed or reported.
DetailsAs a result of magnetic separation, mainly high-grade and run-of-mine intergrowths of magnetite with hematite and quartz are extracted into the magnetite concentrate, …
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In this paper, a sample from Tange-zagh iron mine was characterized by gravity and magnetic separation methods. The mineralogical studies showed that hematite and goethite are the main iron-bearing minerals with insignificant amounts of FeO. The results indicated that spiral separation yields higher separation efficiency than …
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The grades of Fe and SiO 2 also were similar. San et al. [30], after the hydrophobic flocculation of limonite iron ore fines (~38 wt% Fe), increased the performance of magnetic separation for a ...
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A dry induced roll magnetic separator is simple and efficient for upgrading the magnetic mineral and materials. Weak paramagnetic minerals can be effectively removed from an ore by maintaining the field intensity up to ~ 2.5 T [17], [18].IRMS as shown in the Fig. 1 consists of a horse-shoe magnet faced by an iron bridge bar and of …
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The saturation magnetization of transformed samples increases to 60–80 Am²/kg, while the source hematite does not have strong magnetic properties. Hematite with a particle size from 0.05 to 0. ...
DetailsABSTRACT: Present investigation includes the magnetizing roasting of low-grade iron ore fines followed by grinding and beneficiation using magnetic separation. The hematite …
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Studies regarding the dry magnetic separation of low-grade hematite ore using different dry magnetic separator are scarce [14,15,16,17]. The separation efficiency of induced roll magnetic separator (IRMS), which is widely used for the concentration of para-magnetic minerals, depends on several parameters pertaining to design, process …
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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.
DetailsIn Equation (2) is the beneficiation efficiency, ε is recovery of magnetic separation concentrate, γ is the yield of magnetic separation concentrate, α is the iron grade of the magnetic separation feedings, and β m is the theoretical iron grade of specular hematite. 3.2.1. Effect of the reagents type and dosage on the magnetic …
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The effect of magnetite as a magnetic seed on the flotation separation of fine hematite and quartz was studied by reverse micro-flotation and sedimentation. The results demonstrate that fine magnetite could selectively report to the pulp product with hematite particles, forming aggregates that avoided attachment to quartz particle surfaces.
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It was shown in the concerned literatures that different types of coal, from lignite to anthracite with the fixed carbon content range from 30 mass% to 90 mass%, have been used for the reduction of low grade iron ores.6,7) Effect of Coal Type on the Reduction and Magnetic Separation of a High-phosphorus Oolitic Hematite Ore
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Through the combined treatment of magnetization roasting and magnetic separation, hematite (Fe 2 O 3) is roasted in a reducing atmosphere at a certain temperature, and …
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In this context, a low-grade hematite ore with 56.5% Fe has been subjected to heat treatment followed by grinding and wet high intensity magnetic separation (WHIMS). The magnetic separation results indicate that an enhancement in yield by around 15–20% by weight is possible when the ore is heat-treated at 500–800 °C.
DetailsThis charge separation can then be used to catalyze redox reactions on the particles' surface, in a process commonly called heterogeneous photocatalysis. ... The bulk assembly of hematite …
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