By Topic

IEEE Transactions on Magnetics

Issue 5 • September 1976

Filter Results

Displaying Results 1 - 25 of 44
  • [Front cover and table of contents]

    Publication Year: 1976, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (286 KB)
    Freely Available from IEEE
  • Message from the president of the IEEE magnetics society

    Publication Year: 1976, Page(s): 423
    Request permission for commercial reuse | PDF file iconPDF (68 KB)
    Freely Available from IEEE
  • Introduction to the proceedings of magnetic desulfurization of coal symposium

    Publication Year: 1976, Page(s): 424
    Request permission for commercial reuse | PDF file iconPDF (136 KB)
    Freely Available from IEEE
  • Organization of magnetic desulfurization of coal symposium

    Publication Year: 1976, Page(s): 425
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (71 KB)

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Highlights of the symposium

    Publication Year: 1976, Page(s):426 - 427
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High gradient magnetic separation theory and applications

    Publication Year: 1976, Page(s):428 - 435
    Cited by:  Papers (10)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1048 KB)

    This paper discusses key technical and economical achievements which have extended the range of application of magnetic separation methods into the commercial processing of micron size feebly magnetic materials. Commercial application of magnetic methods in the cleaning of kaolin clay is reviewed and a discussion of magnetic separation principles is given with emphasis on identification and utiliz... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • New developments in magnetic separation

    Publication Year: 1976, Page(s):436 - 443
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    High extraction magnetic filters combine high gradient features of the Frantz FerrofilterR, high intensity concepts of the Jones separators, and principles of modern magnet design derived from high energy physics research. Evolution of high extraction magnetic filters used commercially by all major kaolin producers is reviewed and new trends in equipment are highlighted. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Engineering development of high gradient magnetic separators

    Publication Year: 1976, Page(s):444 - 449
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    The commercial development of high gradient magnetic separation began in 1969 when the first industrial, cyclic high gradient magnetic separators were sold to the J.M. Huber Corporation by Magnetic Engineering Associates, Sala's predecessor, for processing high grade paper coating clays. Since that time, high gradient magnetic separation for the processing of high quality clays has come to be full... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Research needs in magnetic separation

    Publication Year: 1976, Page(s):450 - 454
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    High gradient magnetic separation is a new technique which provides a practical means for separating weakly paramagnetic materials down to colloidal particle size on a large scale and at flow rates one hundred times faster than conventional filtration. It is based on the use of matrices of finely divided filamentary ferromagnetic material containing 95% void space, such as steel wool, subjected to... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Magnetic separation of the second kind: Magnetogravimetric, magnetohydrostatic, and magnetohydrodynamic separations

    Publication Year: 1976, Page(s):455 - 462
    Cited by:  Papers (14)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1648 KB)

    Magnetogravimetric, magnetohydrostatic, and magnetohydrodynamic separation techniques can be classified as magnetic separations of the second kind. Magnetic separation of the first kind (ordinary magnetic separation) relies on the inherent magnetic susceptibility of the material to be separated. When the medium of separation rather than the separated particles is made magnetizable, a new system of... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Buildup of particles on fibers in a high field-high gradient separator

    Publication Year: 1976, Page(s):463 - 465
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    In previous publications the performance of a high field-high gradient magnetic filter was calculated using a particle trajectory model to obtain the capture cross section of the fibers. The configuration of the particle buildup was assumed to be constant without considering the forces on the particle after impinging on the fiber. We now calculate the equilibrium configuration of particle buildup ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Single wire model of high gradient magnetic separation processes I

    Publication Year: 1976, Page(s):466 - 470
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    A rate equation is being developed to model the buildup of single-sized, weakly magnetic particles on a single ferromagnetic cylindrical wire. The equation relates the rate of buildup on the wire to the fraction of the incoming particles that are captured and the portion of the particles that are carried away by the fluid stream. The theoretical predictions and experimental results generally agree... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The motion of small paramagnetic particles in a high gradient magnetic separator

    Publication Year: 1976, Page(s):471 - 473
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    The force balance equation describing the motion of a small paramagnetic particle near a cylindrical ferromagnetic collector is presented in general form. The capture cross-section for a particle approaching a bare wire is found to be a function of the coefficient of magnetic force and the magnetization of the cylinder. Calculations show that the assumption of potential flow versus creeping flow i... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Shape effect of the matrix on the capture cross section of particles in high gradient magnetic separation

    Publication Year: 1976, Page(s):474 - 479
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    A high gradient magnetic separator consists of a region of a high and approximately uniform magnetic field and a ferromagnetic matrix of fine wires which distort the field and produce large local gradients. As a particle is carried through the separator by a carrying fluid, both magnetic forces and drag forces are exerted on it. In order to gain insight into the capture mechanism, the drag and mag... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Some old and new concepts in magnetic separation

    Publication Year: 1976, Page(s):480 - 482
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    Magnetic fields, or regions of a magnetic field have been termed isodynamic, katadynamic or anadynamic. Force constant in magnitude throughout an isodynamic field region has proved useful in concentrating particles according to slight differences in magnetic susceptibilities. In the kata-dynamic field region the highest gradients of magnetic intensity, and consequently the greatest magnetic force ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Magnetic barrier--A new concept in magnetic separation

    Publication Year: 1976, Page(s):483 - 485
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Particles can be separated according to their mass magnetic susceptibilities by using a magnetic energy gradient barrier. When a stream of particles with different magnetic susceptibilities is fed to the barrier at an angle, a continuous separation can be obtained. The particles having susceptibilities higher than a predetermined value are deflected and guided by the magnetic barrier to a releasin... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Use of high gradient magnetic separation techniques for the removal of oil and solids from water effluents

    Publication Year: 1976, Page(s):486 - 488
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    Our preliminary experience with using commercially available High Gradient Magnetic Separation (HGMS) instrumentation in water treatment problems is described. Water effluents from both a refinery and a chemical sewer have been used with flocculants to reduce total suspended solids and oil content. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Development of high extraction magnetic filtration by the kaolin industry of Georgia

    Publication Year: 1976, Page(s): 489
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    An entirely new level of magnetic filtration technology was put into full commercial production by the kaolin industry of Georgia, U.S.A. during 1973 - 1975. At present, five kaolin producers in Georgia are operating large magnetic filters each capable of producing over 4000 liters of kaolin slurry per minute or over 60 tons of kaolin per hour on a dry basis. When operated at the 4000 liters per m... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Direct reduction and magnetic beneficiation of Alabama brown ore with lignite

    Publication Year: 1976, Page(s):490 - 492
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    Recent developments in the direct reduction of iron ore and recent growth in its application stimulated the investigation of direct lignite reduction of Alabama brown ore. Essentially complete reduction followed by sufficient agglomeration of the reduced iron was achieved so that grinding followed by magnetic separation appears feasible. The finely divided iron should be especially amenable to hig... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A superconducting magnet system for a very high intensity magnetic mineral separator

    Publication Year: 1976, Page(s):493 - 497
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The basic cryogenic engineering requirements for building a superconducting magnet system for the magnetic separation of minerals are considered. The different construction problems for solenoids and non-circular coils are considered. The solution adopted is epoxy impregnation with high density glass-fibre inserted to control the difference in expansion coefficient between epoxy resins and the win... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Beneficiation of selected industrial minerals and coal by high intensity magnetic separation

    Publication Year: 1976, Page(s):498 - 502
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    This paper presents the results of test work performed with a Pacific Electric Motors (PEM) high intensity magnetic separator (20 kilogauss), a unit capable of separating weakly, as well as strongly, magnetic minerals in the particle size range of sands to clays. Tests were performed on selected industrial minerals and two Indiana coals. With some minerals excellent separations were attained and w... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The application of a superconducting magnet system to the cleaning and desulphurization of coal

    Publication Year: 1976, Page(s):503 - 506
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    The basic requirements for high gradient, high intensity magnetic separation are reviewed and process limitations are emphasized. The principle innovations of the superconducting magnet system design for this work include an annular quadrupole magnet and corresponding slurry channel operating in an open field without secondary poles. The transverse secondary circulation set up in the slurry throug... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High gradient magnetic separation of mineral particulates from solvent refined coal

    Publication Year: 1976, Page(s):507 - 510
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    Inorganic sulfur and ash-forming mineral matter have been removed from solvent-refined coal by high gradient magnetic separation at temperatures up to 587°F. Reduction in sulfur and ash content is temperature dependent and is correlated with the H/v ratio. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High gradient magnetic separation: Effect of temperature on performance

    Publication Year: 1976, Page(s):511 - 512
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    A simple model is formulated to determine the effect of temperature on the filtering ability of HGMS devices. An optimum temperature range is observed to exist for which the capture of ash-forming minerals and inorganic sulfur in liquid coal is at a maximum. Model will serve as a framework for analyzing experimental data in future. In the past, some pertinent, independent variables such as particl... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Pilot-scale studies of sulfur and ash removal from coals by high gradient magnetic separation

    Publication Year: 1976, Page(s):513 - 521
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    This paper presents the results of pilot-scale studies of sulfur and ash removal from coal by high gradient magnetic separation (HGMS). Work was done on both the liquefied coal and the raw pulverized coal in water slurries. The effects of residence time, field intensity, packing material and density, slurry concentration and recycle on the grade and recovery of the wet separation of sulfur and ash... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

IEEE Transactions on Magnetics publishes research in science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Pavel Kabos
National Institute of Standards and Technology