The drum magnetic separator is widely used in the separation of magnetic minerals [1,2,3,4], but its effect of separating fine materials under dry conditions is poor [5,6,7], mainly due to the poor fluidity and the strong interaction between particles [8,9,10].In this case, only relying on gravity and the centrifugal force of the drum is not enough to effectively separate fine materials [].
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A DISCUSSION OF MAGNETIC SEPARATION TECHNIQUES 197 Introduction Minerals separation based on magnetic susceptibility differences in particles is accomplished wet or dry, at various intensities and in different basic machine configurations. The following types of industrial magnetic separators can be found in a modern mineral sands plant:
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The magnetic separator is used for mineral ore dressing of magnetite, pyrrhotite, ilmenite, wolframite, manganese, rare earth ore and other materials with a particle size of less than 3 mm, and is also used for iron removal operations of coal, non-metallic minerals, building materials and the like. Types of magnetic separator 1.
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A separator to receive a fluid slurry containing magnetic particles and non-magnetic particles and operable to increase the concentration of the magnetic particles at one region within the slurry and deplete the concentration of the magnetic particles at another region of the slurry. There are no moving parts in this separator and its operation is continuous.
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MAGNETIC SEPARATION Based on magnetic behavior matrial can be classified as” 1. Ferromagnetic –very strong magnetic susceptibility- iron, nickel and cobalt. 2. Paramagnetic –weak magnetic susceptibility – a) Weakly magnetic b) Strongly magnetic 3. Diamagnetic particles –repelled by magnet 4. Non magnetic
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The Frantz Isodynamic magnetic separator is a precision laboratory instrument and consists of a chute passing through two electromagnetic poles. The magnetic field and/or chute slope can be varied to separate fine, dry mineral samples. The method of separation is on a particle by particle basis and is hence used as a benchmarking tool for
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Figure : Schematic representation of forces acting upon a particle (Svoboda et aI., 2003) The principles of magnetic separation are such that when particles of different magnetic susceptibility are placed in a magnetic field, they tend to disrupt the direction or the flow of the magnetic field and at the same time lead to the particles being magnetically induced.
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A separator for separating small permanent magnetic particles from larger objects comprising a non-magnetic perforated basket within a non-magnetic solid wall container, both within a generally vertical rotating magnetic field. The basket supports the mixture of permanent magnetic particles and objects and has perforations larger than the permanent magnetic particles and smaller than the objects.
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Magnetic separation is a versatile technique used in sample preparation for diagnostic purpose. For such application, an external magnetic field is applied to drive the separation of target entity (e.g. bacteria, viruses, parasites and cancer cells) from a complex raw sample in order to ease the subsequent task(s) for disease diagnosis.
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MAGNETIC SEPARATION Based on magnetic behavior matrial can be classified as” 1. Ferromagnetic –very strong magnetic susceptibility- iron, nickel and cobalt. 2. Paramagnetic –weak magnetic susceptibility – a) Weakly magnetic b) Strongly magnetic 3. Diamagnetic particles –repelled by magnet 4. Non magnetic
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Vertical ring and pulsating high gradient magnetic separator (VPHGMS) is designed Magnetic Jigging Principles, where the pulsation mechanisms assist in improving separation efficiency of magnetic minerals from non-magntics. This is achieved by agitating the slurry and keeping the particles free in order to minimise particle
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Now that magnetic rotation separation has been shown to be both possible and practical, there is a need for a practical quantity to describe relative mineral rotation strengths.
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Mineral size. Dry magnetic separation function for bulk, coarse particle separation, but also fine mineral separation, while wet magnetic separator can not sort large bulk minerals, most are effective for fine or even fine particles, except for a few models that can select coarse particle.
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Magnetic Disc Separators. The Magnetic Disc Separator (MDS) is a sorting system equipped with up to three independently working discs which generate magnetic field strengths up to 14,000 gauss. The high magnetic forces that the MDS generates are able to extract paramagnetic particles from a free-flowing, dry product stream (100μm – 1.5mm).
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Superconducting high-gradient magnetic separator, a magnetic separator equipped with a superconducting magnet, can produce higher than 9 T magnetic flux density , . Via the for a certain mineral particle, the capture force is determined by the strength of the magnetic field intensity. Hence, the smaller the mineral particle size, the higher
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Companies such as Eriez, Minerals, Outokumpu Technology and Steinert Elektromagnetbau all produce large-scale magnetic particle separators designed and used for ‘non-bio’ applications, e.g. in the mineral and steel industries (Franzreb et al. 2006; Franzreb and Watson 2001).
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Mineral size. Dry magnetic separation function for bulk, coarse particle separation, but also fine mineral separation, while wet magnetic separator can not sort large bulk minerals, most are effective for fine or even fine particles, except for a few models that can select coarse particle.
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Electrostatic separators are commonly used in conjunction with high-intensity magnetic separators. The electrostatic technology is successfully used in the mineral processing, plastics and recycling industries, although there is a continual expansion in the application of the technology.
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Dry high-intensity magnetic separators are one of the most common magnetic separation methods extensively used for the concentration of paramagnetic minerals based on their magnetic susceptibility, particle size, particle density, and shape.
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In a conventional magnetic separator, the translation of a particle is induced by an attractive magnetic force caused by a magnetic field gradient; here, the force is generally believed to act
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The drum magnetic separator is widely used in the separation of magnetic minerals [1,2,3,4], but its effect of separating fine materials under dry conditions is poor [5,6,7], mainly due to the poor fluidity and the strong interaction between particles [8,9,10].In this case, only relying on gravity and the centrifugal force of the drum is not enough to effectively separate fine materials [].
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Modeling and Simulation of Mineral Processing Systems4.92 Мб. of particles in magnetic fields 8.2 Forces experienced by a particle in a magnetic field 8.3 Magnetic properties of minerals 8.4 Magnetic separating machines 8.5 Dry magnetic separation 8.6 Wet high intensity magnetic separation Bibliography References 269 269 272 277 278 283 287 288 288 9...
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Conversely, paramagnetic minerals have a positive magnetic susceptiblity and are attracted to the lines of magnetic flux. T. Separator Design. In the design of the magnetic separator, the strength and the gradient of the magnetic field are two first order variables that affect mineral response.
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Magnetic separators can be found in most mineral processing operations, especially those processing non-metallic minerals and magnetic ores. This article investigates the use of high intensity magnetic separators and magnetic separation equipment in the minerals sector with a focus on processing dry materials (in the -15mm, +45 micron size range).
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The Frantz Isodynamic magnetic separator is a precision laboratory instrument and consists of a chute passing through two electromagnetic poles. The magnetic field and/or chute slope can be varied to separate fine, dry mineral samples. The method of separation is on a particle by particle basis and is hence used as a benchmarking tool for
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Magnetic Separator Wet
Abstract. With the objective of developing a wet, low-intensity magnetic separator model, a number of plant data were analysed. Although the particle size versus mineral recovery relationship for a given stage of magnetic separation in a plant appeared to be reasonably stable, it was found that magnetic separation could not be classified as a deterministic process on this basis.
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The magnetic susceptibility varies inversely as the square of the magnetic pole strength. Thus, doubling the magnetic field will allow the separation of a mineral particle with one fourth the magnetic susceptibility. A relation between vx and m can be obtained under two limiting conditions: Condition 1
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The magnetic susceptibility varies inversely as the square of the magnetic pole strength. Thus, doubling the magnetic field will allow the separation of a mineral particle with one fourth the magnetic susceptibility. A relation between vx and m can be obtained under two limiting conditions: Condition 1
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Gravity separation relies on differences in material mass to separate minerals. Methods include jigs, sluices, spirals, shaking tables, fine particle separators, and hydrosizers and cyclones. Gravity separation is separation based on weight only and is directly affected by particle size since volume is proportional to weight.
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The high gradient magnetic separator greatly increases the types of optional minerals and widens the upper and lower particle size limits. Handle occasions where the content of magnetic materials is extremely low and the particle size is very thin.
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