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Tord Kroon

Jan-Erik Eriksson

Erik Svensson

Anders Lehman

Xiaojing Zhang

Mohamed Ali Rahmani

Ola Widlund

Olof Hjortstam

Bengt Rydholm

Hongliang Yang

Rebei Bel Fdhila

Shiva Sander-Tavallaey

Conny Svahn

Ulf Sand

Helmut Hackl

Olof Sjödén

G&ouml;te Tallb&auml;ck

Christer Carlsson

Tord Lindblad

Alf Lundström

Jan- Erik Eriksson

A method for reducing vortex formation in molten metal when bottom tapping the molten metal from a metallurgical vessel in a metal making process. The method includes the steps of tapping the molten metal via a tapping hole in the metallurgical vessel, and providing a flow of the molten metal in the metallurgical vessel while tapping via a time-varying electromagnetic field applied to the metallurgical vessel, the flow of the molten metal being such that it constantly moves vortices in the molten metal away from a tapping hole region during the tapping to thereby prevent accumulation of the vortices for vortex formation over the tapping hole. It is also presented an arrangement for carrying out the method.

Method and arrangement for vortex reduction in a metal making process

An apparatus for electromagnetic stirring of the steel melt in an electrical arc furnace includes two electromagnetic stirrer units, a current supply, and a control unit. The two stirrers are mounted on an outer bottom surface of the electrical arc furnace at opposites sides of a central position of the bottom surface, the current supply is operatively connected to the two electromagnetic stirrer units, and the control unit is operatively connected to the current supply to control the operation of the two electromagnetic stirrer units.

Apparatus and method for electromagnetic stirring in an electrical arc furnace

A furnace plant including at least one furnace vessel comprising side walls, a bottom and a roof. At least one heater is configured to heat metal in the furnace vessel. A compartment includes sidewalls lined with refractory material. The compartment forms an extension of the furnace vessel. At least one electromagnetic stirrer is arranged outside and adjacent to the compartment. A refractory plate is arranged inside the compartment. The refractory plate includes an upper edge configured to be positioned below a meniscus of molten metal and includes a lower edge positioned spaced apart from a bottom of the compartment. The plate is arranged such that a gap between the plate and a wall of the compartment increases toward the bottom of the compartment.

Device for submerging material into liquid metal by an electromagnetic stirrer

A method and a device for continuous casting of metals, in which the device comprises a mould ( ), through which a liquid metal passes, and a member ( ), through which a liquid metal is supplied as a jet to the mould ( ). The device comprises magnet members ( ) for applying a magnetic field varying with time and being substantially fixed in the room to the liquid metal in the mould ( ).

Method and device for continuous casting of metals

A device for continuous or semi-continuous casting of metal has a cooled continuous casting mold assembly and an inductive coil arranged at the top end of the mold assembly. The mold assembly is divided into at least two mold assembly parts separated and electrically insulated from each other by partitions, which are oriented in the casting direction and where each partition is formed with an electrically insulating barrier. Each mold assembly part has a mold part associated with a corresponding mechanically supporting mold back-up structure part, and an electrical conductor, with an electrical conductivity higher than the electrical conductivity of the back-up structure. The conductor is arranged with the mold back-up structure part on the side of the mold back-up structure part facing away from the mold, the outside face.

Device for casting of metal

A device for continuous or semi-continuous casting of metal comprising a cooled mold ( ) and an induction coil ( ) arranged at the top end of the mold. The mold comprises in its top end a plurality of hollow, old segments ( ) separated from each other by partitions ( ), which all comprise an electrically insulating barrier. Both the mold segments and the partitions are oriented essentially in the casting direction. Each hollow top end mold segment comprises a core of a mechanically supporting bar or beam ( ) arranged within the hollow mold segment such that it is surrounded by the hollow mold segment. The core exhibits superior mechanical properties in relation to the mold.

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Vasteras, Sweden

Tord Kroon