With Induction Patents (Class 373/4)
  • Patent number: 7675959
    Abstract: Thus, as shown by an exact electrodynamic computation of EMBF and the estimations described above of the velocity of turbulent flows arising due to their effect, application of amplitude- and frequency-modulated helically traveling (rotating and axially traveling) electromagnetic fields in metallurgical and chemical technologies and foundry can considerably increase the hydraulic efficiency of MHD facilities, intensify the processes of heat and mass transfer in technological plants, significantly increase their productivity, considerably decrease energy consumption for the production of metals, alloys, cast articles, and chemical products, and improve their quality.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: March 9, 2010
    Assignee: Energetics Technologies, LLC
    Inventors: Irving I. Dardik, Arkady K. Kapusta, Boris M. Mikhailovich, Ephim G. Golbraikh, Shaul L. Lesin, Herman D. Branover
  • Patent number: 6831939
    Abstract: A method of operating an induction furnace so as to receive electric arc furnace (EAF) dust, basic oxygen furnace (BOF) sludge/dust and/or other iron and volatile metals containing materials as a feed stream on a batch, continuous or semi-continuous basis together with a iron-containing material feed, and therefrom produce an iron-containing hot metal or pig iron product while recovering iron value from the feed materials and recovering volatile metal components contained in the feed materials.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: December 14, 2004
    Assignee: Heritage Environmental Services, LLC
    Inventors: James E. Bratina, Fred M. Fehsenfeld, Sr.
  • Patent number: 6349107
    Abstract: A method of magnetically-controllable, electroslag melting of titanium and titanium-based alloys is provided that includes the effect of an external radial magnetic field on the metallurgical melt. The field forms at least two adjoining melting layers which are rotated horizontally in opposite directions, and causes intralayer and meridional toroidal rotation of the melt. The uniform hydrodynamic structure of the melt over the total length of the ingot is stabilized by changing the melting voltage. The external radial magnetic field and the use of a fluoride-chloride flux improves the refinement of metal (by reducing harmful inclusions), condenses the metal structure, and provides high chemical and physical homogeneity of the metal ingot. This method is the most useful in the production of high strength titanium alloys including heavy metals (e.g., W, Mo, Cr and Fe).
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: February 19, 2002
    Inventor: Yaroslav Yurievich Kompan
  • Patent number: 6221123
    Abstract: An apparatus and a method for melting solid metals, including iron, are provided. The apparatus includes a vertical shaft furnace through which the metal is fed. The shaft furnace is mounted on a horizontal induction furnace containing a molten pool of metal. Metal solids are charged at the top of the vertical shaft furnace down onto a refractory pedestal in the molten metal pool or suspended magnetically in the vertical shaft above gas burners. The metal is melted by contact with the molten metal pool. The combination of oxygen fuel burner preheating and induction melting creates an extremely efficient melting unit that can process metal at a much lower cost than conventional systems while preventing the oxidation problems incurred by apparatuses which melt metal using combustion only.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: April 24, 2001
    Assignee: Donsco Incorporated
    Inventor: Arthur K. Mann, Sr.
  • Patent number: 5936996
    Abstract: A furnace plant which at least one furnace vessel with side walls and a bottom and at least one heat source which by radiation and convection heats molten metal and/or solid metal present in the furnace vessel. At least one two- or multiphase electromagnetic side stirrer is arranged in or near the wall of the furnace vessel to act through the wall and apply a stirrer field to the molten metal. The side stirrer comprises at least two phase windings arranged around an iron core having a vertical extent, H, which essentially covers the region, D.sub.max, between the bottom and the upper surface of the molten metal at a maximum bath depth used in the furnace 15 vessel. The side stirrer is arranged with a pole pitch.tau. which exceeds twice the distance from the iron core to the molten metal, .tau.>2 dw.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: August 10, 1999
    Assignee: Asea Brown Boveri AB
    Inventors: Magnus Eidem, Per Henriksson, Lars Karlsson, Lars Nordekvist, Petter Oscarsson, Gunnar Sellberg, Gote Tallback
  • Patent number: 4403327
    Abstract: At least one arc furnace and at least one induction furnace are connected to the same AC network, the induction furnace being connected via a controllable alternating voltage converter so as to permit compensation of active power fluctuations in the network caused by operation of the arc furnace and the induction furnace being designed to contain scrap for its inductive preheating before charging in the arc furnace.
    Type: Grant
    Filed: April 21, 1981
    Date of Patent: September 6, 1983
    Assignee: ASEA AB
    Inventors: Staffan Granstrom, Sven Ivner