Other

Voest-alpine Industrieanlagenbau Gmbh

Thyssenkrupp Nirosta Gmbh

Voest-alpine Industrieanlagenbau Gmbh & Co.

Centro Sviluppo Materiali S.p.a.

Thyssenkrupp Acciai Speciali Terni S.p.a.

Unisor

Sms Demag Ag and Acciai Speiciali Terni S.p.a.

Sms Siemag Aktiengesellschaft

Arcelor France

Acciai Speciali Terni, S.p.a.

Romeo Capotosti

Riccardo Tonelli

Pietro Tolve

Gerald Hohenbichler

J&uuml;rgen Sucker

Stefano Pellissetti

Franco Macci

Axel Weyer

Armin Schertler

Philippe Guillo

Jean-Michel Damasse

Alessandro Ferretti

Guiseppe Guasto

Alessandro Cristallini

Holger Dr-Ing Beyer-Steinhauer

Alessandro Dipl-Ing Cristallini

Jürgen Dr-Ing Sucker

A twin roll caster for an apparatus for confining the impurities in a molten metal fed by means of a discharger and contained into an area of a strip continuous casting mold delimited by the side surfaces of two casting rolls with counter-rotating horizontal axis and by two containment side plates positioned in contact with the rolls' bases is provided. The apparatus includes a discharger having at least two first series of holes for the molten metal supply, each series being formed by at least a pair of holes respectively directed towards one of the opposed side surfaces of the two rolls and at least a second pair of holes for the molten metal supply, each hole of such second pair being directed towards the side plate nearest thereto, and said at least one second pair of holes being positioned at a greater depth with respect to said two first series of holes, and at least two pairs of barriers present in one part of the area comprised between the end of the nozzle and the containment side plates, forming the cross-sections of said barriers therebetween, lying on a same horizontal plane, an Y angle.

Apparatus for confining the impurities of a molten metal contained into a continuous casting mould

The invention relates to a side wall () of a plant for the continuous casting of metal strip () between two counter-rotating rolls (') having horizontal axes and being internally cooled, the surfaces of which define a casting space confined laterally by two side walls () made of refractory, of the type comprising:

Lateral face of an installation used for the twin-roll continuous casting of metal bands

A casting wheel for the continuous casting of strips of metal has a core and sleeve of heat-conductive material which is shrunk on the core, and circumferential cooling ducts arranged between the core and the sleeve, which are connected with coolant supply line and coolant discharge line. The coolant is guided from the radially extending supply line into cooling ducts and from cooling ducts into the radially extending discharge line by means of a guiding element that can be inserted in cooling ducts.

Casting wheel

A casting mold for continuously casting metal has a pouring area having cooled wide sidewalls and cooled narrow sidewalls. The pouring area tapers in a funnel shape in horizons arranged underneath each other in a casting direction to a format of a strand to be cast, wherein the wide sidewalls are sidewall plates having curved contour areas. At least within one height portion of the casting mold the curved contour areas are asymmetrical relative to a line intercepting center points of the narrow sidewalls.

Casting mold for continuous casting of metal with a pouring area having cooled wide sidewalls and narrow sidewalls and tapering in a funnel shape

A disadvantage of continuously casting thin metal strips in a continuous casting plant ( ) wherein the casting strand ( ) exits the mould ( ) in a downward direction and is guided in a vertical strand guide ( ) with the help of pairs of driver rolls ( ) for supporting and conveying the strand ( ), is that the force with which the driver rolls ( ) are pressed against the strand ( ) results in the unchecked rolling of the strand while it is still soft. The aim of the invention is to solve this problem. To that end, the driver rolls ( ) are pressed against the strand ( ) with a variable pressure (P , P ) which is regulated &ldquo;on-line&rdquo; in accordance with the thickness (d , d ) of the strand ( ), in such a way as to obtain and maintain a constant strand thickness.

Method and device for continuously casting thin metal strips

In a method of preventing contact of oxygen with a metal melt, metal melt flows into a casting chamber bounded by walls ( ) and leaves this chamber as a stream. In order to completely prevent contact of oxygen with a metal melt and thus reoxidation, oxygen attempting to enter via any gaps ( ) between the walls ( ) and/or adhering to the walls ( ) is reacted to form a compound which is not injurious to the metal melt ( ).

Method of preventing contact of oxygen with a metal melt

A cooling roll having superficial dimples, for continuous casting machines with a pair of counterotating rolls in contact with the cast metal is characterized by the fact that it presents the surface that comes to contact with the cast metal provided with a first and a second dimensional order of cavities ( ) randomly spaced, and optionally, at least partially in contact between them; the strickle impressed on the roll surface ( ) of each cavity ( ) of at least one of said first and second dimensional order being of polygonal or circular shape and, more preferably rhomboidal.

Surface of a cooling roll for continuous casting machines

Method of preventing contact of oxygen with a metal melt during continuous casting, the metal melt flows into a casting chamber bounded by rolls and a hood and leaves this chamber as a stream. To completely prevent contact of oxygen with the metal melt and thus reoxidation, oxygen attempting to enter via any gaps between the walls and/or adhering to the walls is removed by suction applied at a succession of suction stages at the periphery of each roll before a gap between the hood and the roll at the top of the casting chamber. Inert gas may then flow to the rolls near the gap.

How to avoid contact between oxygen and molten metal

A funnel geometry of a mold for the continuous casting of metal, wherein the mold has a pouring portion with cooled long side walls and short side walls, wherein the pouring portion becomes narrower in the shape of a funnel in the casting direction until it reaches the size of the cast strand. In the funnel portion the inner contour of the long side walls is constructed convexly along a straight line connecting the upper edge of the mold and the outlet of the pouring portion.

Funnel geometry of a mold for the continuous casting of metal

A process for producing the oscillation of a continuous casting mold, especially with the use of a hydraulically driven lifting device. So that the heat transfer to the mold and the formation of the casting shell can be effectively controlled, it is proposed that, for any given strand withdrawal rate, the zero line of the mold oscillations relative to the position of the surface of the steel in the mold be moved upward and/or downward during the casting process. As a result of this measure, the quality of the cast product is effectively improved.

Method for swaying a continuous casting mold

A method for continuously casting thin metal products, the method comprising the operations of pre-heating a pair of refractory plates ( ) for the lateral containment of a bath of molten metal constituted of a pair of counter-rotating rolls ( ) and of abutting said pair of plates ( ) towards each lateral surface of the ends of said pair of rolls ( ), characterized in that it comprises the operations of applying a controlled elastic or elastic/plastic deformation to said pair of plates ( ) at the contacting arc between the surface of the plates ( ) and the peripheral portion of the ends of said rolls ( ), and controlling said elastic and/or elastic-plastic deformation of said pair of plates ( ) during the whole casting process, so as to minimize the surface wear of the plates ( ) and of the ends of the rolls ( ), and to guarantee the maintainment of a predetermined distance between said rolls ( ) and said plates ( ) lower than a predetermined value, and to minimize the occurrence of leaks-of molten metal between said plates ( ) and said end parts of said rolls ( ).

Method for the continuous casting of thin metal products, and apparatus for carrying out the same

The present invention provides a feeder of molten metal for moulds of continuous casting machines comprising a cylindrical body ( ) within which a main outflow duct ( ) of the molten metal coming from the tundish is formed to which the cylindrical body ( ) is connected by means of a frustoconical joint ( ), formed integrally with the cylindrical body ( ) at the upper end thereof, characterized in that the free end ( ) of the cylindrical body ( ) is of substantially frustopyramid shape and has a plurality of outlets ( ) communicating with the main outflow duct ( ).

Growing community of inventors

Narni, Italy

Romeo Capotosti