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Application of ultrasonic technologies to nondestructive control is one of promising methods to enhance efficiency of iron ore concentration, this involving attainment of operative data on technological processes and treatment of ore particles by controlled high-energy ultrasound, in particular, by forming cavitation processes in iron ore ...
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Conventional magnetic separation of fine iron ore with different magnetic intensities using tap water (∼2 mM) at pH 8. At least duplicate tests were carried out for each condition. ... In summary, this study aimed to improve the magnetic separation efficiency of fine iron particles through floc-magnetic separation experiments. The key ...
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Semantic Scholar extracted view of "Selective Flocculation/Magnetic Separation of Ultrafine Iron Ore Particles with Corn Starch and Polyacrylamides: A Comparative Study" by E. S. Alvim et al.
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Rough processing of iron ore employs dry methods which means that equipment is tuned to process large particles, but fine magnetic material less than a few tenths of a millimeter in size is not separated as efficiently. The relevance of this study is determined by the fact that dry beneficiation waste contains recoverable iron-bearing …
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Magnetic Separation and Enrichment of Fe–Ti Oxides from Iron Titaniferous Beach Sands: Process Design Applied to Coastal Ecuador. by. Willam Trujillo. 1, Joseph Cobo. 1,2, Dayanna Vera …
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As Tripathy explains, some types of FDMS can't separate ores smaller than 45µ – frustrating given iron ore particles can be as small as 30µ. Then there are more fundamental problems of magnetic separation. Materials like iron are perfect for FDMS, after all, but what about non-magnetic metals like aluminium, copper or zinc? An …
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Iron ore tailings (IOTs) generated during the processing and utilization of iron ore are vital components of mineral solid wastes [1]. As the demand for metals and minerals increases globally, the amount of IOTs also increases annually. ... In the magnetic field, particles separation mainly depended on F m and F D, as shown in Eq. (5). Only ...
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An innovative dry vibrating high gradient magnetic separation (HGMS) method was developed for the purification of non-metallic ores, and the effect of key variables, i.e., magnetic induction, rotation speed of ring, vibrating amplitude and frequency of ring on the separation performance of a full-scale dry vibrating HGMS separator in …
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Recovery of Iron Values from Iron Ore Slimes by Selective Magnetic Coating. S. Prakash Dr. Bhumika Das B. Mohapatra R. Venugopal. Materials Science, Chemistry. 2000. Effective separation of iron values from iron ore slimes using a wet magnetic separator and selective magnetic coating is reported.
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Introduction. Iron-containing ore beneficiation includes several stages. For example: crushing to. 30 mm size class and rough magnetic separation, further crushing of the recovered magnetic product to 10 mm size class and final magnetic metal content upgrading. All operations use dry methods.
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The effect of CaCO 3, Na 2 CO 3, and CaF 2 on the reduction roasting and magnetic separation of high-phosphorus iron ore containing phosphorus in the form of Fe 3 PO 7 and apatite was investigated. The results revealed that Na 2 CO 3 had the most significant effect on iron recovery and dephosphorization, followed by CaCO 3, the …
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Introduction. Pulsating high gradient magnetic separation (PHGMS) is now widely applied in the world, for separation of fine weakly magnetic ores such as oxidized iron ores, ilmenite and wolframite and for purification of non-metallic ores such as quartz and feldspar, due to its high reliability, high throughput and low operational cost …
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This chapter introduces the principle of how low-grade iron ores are upgraded to high quality iron ore concentrates by magnetic separation. Magnetite is the most …
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The treatment of different size fractions and total sample issues of washing process by dry high intensity magnetic separation (DHIMS) improved the quality of iron ore assaying 54.09% Fetotal ...
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Separation of iron from fine particles of high iron bauxite ore by the process of metallized reduction and magnetic dressing was researched systemically. The effect of magnetic field intensity, reduction temperature, reduction time, mole ratio of fixed carbon to reducible oxygen (FC/O) and ore particles size on separation indexes was researched.
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Iron ore tailing is a major solid waste requiring advanced recycling methods because ore tailing powder is polluting air and water resources. For instance, about 300 million tons of tailings are disposed yearly in 1229 iron ore tailings dams in the Hebei province in China. Iron ore tailings can be recycled as functional materials because these tailings are …
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Dry magnetic separation (DMS) has been used for separating large magnetic ores, but it produces a low selectivity for fine particles, due to the challenge of dispersing feed materials. A novel full-scale centrifugal dry magnetic separator (cDMS) was developed, and in this investigation, it was used to process a fine magnetite ore, which …
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An iron ore concentrate with total iron content of 56.34% at the recovery rate of 88.05% can be obtained by magnetic tube separation under the roasting conditions of 800℃ for 60 min and slight ...
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Moreover, the images of SEM showed that the addition of Na 2 SO 4 during the roasting process can also promote the aggregation and growth of iron-rich particles, promoting the iron-rich particles' liberation in milling and resulting in a further dramatic improvement in Fe grade and Fe recovery ratio of iron concentrate by magnetic …
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This study proposed a new treatment called flash reduction–melting separation (FRMS) for boron-bearing iron concentrates. In this method, the concentrates were first flash-reduced at the temperature under which the particles melt, and the slag and the reduced iron phases disengaged at the particle scale. Good reduction and melting …
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In a typical magnetic separation process, ore bulks move horizontally to the magnetic field under the action of friction with the conveyor belt, and then the non-magnetic ore bulks move with parabolic motion governed by inertial force and gravity, whereas …
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In this paper, fine weakly magnetic particles were extracted from iron ore beneficiation tailings and silica (SiO2) was separated and purified using a superconducting high gradient magnetic separator.
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The conventional beneficiation approaches for iron ore mainly include magnetic separation, gravity separation, electrostatic separation, and several combined flowsheets [[1], [2], [3]]. ... which affected the density-based separation of coarse iron ore particles. Abundant low-grade iron ore particles may mix into the sinks and the high …
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The research is aimed at solving the topical problem of enhancing efficiency of iron ore magnetic separation by applying ultrasonic technologies to identify optimal …
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Request PDF | On May 18, 2023, E. S. Alvim and others published Selective Flocculation/Magnetic Separation of Ultrafine Iron Ore Particles with Corn Starch and Polyacrylamides: A Comparative Study ...
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The main process of this technology is that bubbles carry selective but poorly adhered ore particles ... [13,14,15] and is widely used in the treatment of strong …
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Under the optimum roasting and magnetic separation conditions, the iron grade of magnetic concentrate reached 66.40 %, the iron recovery was 92.44 %, and the sulfur content decreased significantly ...
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1. Introduction. Dry magnetic separation is a technology that sorts magnetic minerals from gangue using air as the medium instead of water. When raw ore is fed to the magnetic separator, the magnetic particles are subjected to magnetic force due to the nonuniform magnetic field.
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Wastewater Treatment and Reuse. Y. Gong, D. Zhao, in Comprehensive Water Quality and Purification, 2014 3.11.2.5 Magnetic Separation. Magnetic separation is a process where a contaminant is first attached onto a magnetic carrier material (e.g., magnetite), and subsequently, the contaminant-laden carrier is separated under a magnetic field. The …
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commonly used beneficiation methods for iron ores are the gravity and magnetic separation techniques [4−6]. Gravity separation is widely used in mineral bene-fication practices for its low-cost, ease of operation and easy to control, and eco-friendly nature [4, 7−9]. It is an appropriate method of concentration for size
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