Journal ArticleDOI
An Analysis of an Electromagnetic Mold for the Continuous Casting of Nonferrous Metals
TLDR
In this paper, the effect of the field shaping short-circuited turn (screen) on the field strength, pressure and force factors was examined using a one-dimensional field model and a two-dimensional semi-infinite model.Abstract:
Electromagnetic molds are presently being used in the continuous casting of aluminum billets and slabs. Various theoretical models that can be used to predict electromagnetic pressure differentials and forces for this application are examined. Dimensionless pressure and force factors are first derived using a one-dimensional field model. These factors are then refined using a two-dimensional semi-infinite model. This latter model is also used to examine the effect that coil coupling has on the field strength, pressures and forces. Finally, the coupled circuit method is used to predict pressure distributions for an actual mold geometry, including the essential effect of the field shaping short-circuited turn (screen). The effect of varying the location of the inductor and screen is examined.read more
Citations
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Journal ArticleDOI
Electromagnetic refining of aluminum alloys by the CREM process: Part II. Specific practical problems and their solutions
TL;DR: In this paper, the main characteristics of this new technology are the elimination of the need for grain-refiner master alloys and a marked reduction of the scalping operation, and the three-dimensional aspect of the electromagnetic and fluid flow phenomena, the effect of the electrical conductivity of the ingot mold and the improvement of the process design are examined.
Journal ArticleDOI
Mathematical modeling of meniscus profile and melt flow in electromagnetic casters
J. Sakane,B. Q. Li,James Evans +2 more
TL;DR: In this paper, a mathematical model was proposed to predict the meniscus shape and melt flow in an electromagnetic caster, with and without a screen to shape the magnetic field, and the dependence of shape on parameters such as inductor geometry, placement, current, and frequency, as well as screen properties and placement.
Journal ArticleDOI
Computation of shapes of electromagnetically supported menisci in electromagnetic casters. II. Calculations in three dimensions
Bo Li,J.W. Evans +1 more
TL;DR: In this paper, an algorithm was developed for the calculation of surface currents and melt geometry for electromagnetic casters in three dimensions, which yielded computed surface currents matching an analytical equation for the surface currents in a somewhat simpler geometry.
Journal ArticleDOI
Electromagnetic and fluid flow phenomena in a mercury model system of the electromagnetic casting of aluminum
TL;DR: In this paper, a mathematical formulation has been developed to represent the electromagnetic force field and the velocity field in the melt for the electromagnetic casting of aluminum, and the theoretical predictions based on fundamental considerations are compared with experimental measurements obtained on a physical model system.
Journal ArticleDOI
The use of electromagnetic casting for AI alloys and other metals
TL;DR: In this paper, the fundamental phenomena governing the operation of the caster and the structure of the ingots cast are examined and a review of the development of the technology and its fundamental properties are presented.
References
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Journal ArticleDOI
Electromagnetic Levitation of Solid and Molten Metals
TL;DR: In this article, an unconventional method of heating and melting metals without a crucible, by suspension in space with an electromagnetic field, is described, and the results obtained by means of the new technique encourage the thought of melting, purifying, alloying and agitating of inert and reactive metals without resort to crucibles, and thereby avoiding the contamination of reactive metals by crucible materials.
Journal ArticleDOI
The Prediction of Current Distribution in Induction Heating Installations
Richard F. Dudley,P. Earl Burke +1 more
TL;DR: In this paper, a coupled equivalent circuit approach for predicting the current distribution in three-dimensional geometries having axial symmetry is described, and several self-inductance and mutual inductance formulas are investigated, and the merits of these formulas for calculating the parameters for the equivalent circuit are compared.
Journal ArticleDOI
Electromagnetic Levitation Melting of Large Conduction Loads
TL;DR: In this article, a new kind of levitator was developed that allows the levitation melting of large metallic loads, such as 1-kg aluminum spheres, without relying on the effect of surface tension.
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