Danieli & C. Officine Meccaniche S.p.a.

Italimpianti S.p.a.

Iritecna Societa Per L'impiantistica Industriale E L'assetto Del

Roberto Millone

Estore Donini

Stefano Deplano

Fausto Drigani

Andrea Carboni

Cesare Galletti

Fabio Fasoli

Eugenio Melis

Maurizio Patrone

Method and device to control the axial position of slabs emerging from continuous casting applied in rolling plants comprising at least a casting machine ( ), a heating and/or temperature maintenance furnace ( ) and a roughing and prefinishing ( ) or finishing train ( ) comprising at least one rolling stand ( ), the method serving to align the axis ( ) of a slab ( ) entering the furnace ( ) with the axis ( ) of the first rolling stand ( ), the method providing to control the axial position of the slab ( ) and to activate at least a thruster element ( ) able to be introduced inside the furnace ( ) to act on the edge of the slab ( ) and displace it laterally according to a measured discrepancy between the axis ( ) of the slab ( ) and the axis ( ) of the rolling stand ( ), wherein the thruster element ( ) has a contact element ( ) able to cooperate with the edge of the slab ( ) advancing inside the furnace ( ).

Method to control the axial position of slabs emerging from continuous casting and relative device

Method and device to control the axial position of slabs emerging from a continuous casting machine, providing to control the axial position of the slab (,) in correspondence with the inlet to the first rolling stand and to act in feedback on means to modify the correct position of the axis (,) of the slab (,) in a position located between the first rolling stand and the foot rolls (,) of the ingot mold (,) from which the slab (,) emerges, wherein alignment means operating inside the furnace (,) are employed to induce a controlled lateral displacement governed by the control of the axial position of the slab (,).

Method to equalize the temperature in a heating furnace (10) with a controlled-oxidization ambient, the furnace (10) comprising at least one insulated chamber (11) cooperating with a supporting and conveying surface defined by a plurality of rollers (12), the rollers (12) including rings (35) to bear slabs (19), a plurality of burners (18) being comprised in cooperation with the upper part of the furnace (10), whereas a plurality of aspiration intakes (21) is included in cooperation with the lower part of the furnace (10), the feed to the burners (18) being adjusted in such a way as to ensure a strongly oxidizing atmosphere within the furnace (10) so as to obtain a desired and controllable layer of scale on the surface of a slab (19) in the furnace (10), this strongly oxidizing atmosphere being conveyed so as to surround and lap continuously and evenly the whole periphery of the slab (19), the furnace (10) cooperating downstream with a descaling assembly (22) to remove the layer of scale thus formed. Heating furnace (10) with a controlled-oxidisation ambient, which comprises at least one insulated chamber (11) cooperating with a supporting and conveying surface defined by a plurality of rollers (12), the rollers (12) including rings (35) to support slabs (19), a plurality of burners (18) being included in cooperation with the upper part of the inside of the furnace (10), whereas a plurality of aspiration intakes (21) cooperates with the lower part of the inside of the furnace (10), the furnace (10) comprising a plurality of diversion baffles (20) to convey and direct fumes and gases, the baffles (20) being positioned in cooperation with the burners (18) and extending vertically to a position close to the upper surface of the slab (19), the burners (18) being fed in such a manner as to create a strongly oxidizing atmosphere within the furnace (10).

Method to equalize the temperature in a heating furnace with a

In a method for quenching, particularly for steel tubes or similar, the tube (T) is quenched by a vortical flow of cooling liquid at least along the outer shell surface, with at least a circulatory motion inside the tube. The vortical flow of cooling liquid has a component of circulatory motion in the circumferential direction around the outer shell surface of the tube and a component of motion in the axial direction with respect to the tube. A device for the application of the method has a container (1) for the tube (T), with at least one source (18, 217) of supply of an external cooling liquid flow, and with an outlet (101) for the discharge of the flow from the container (1). The source (18, 217) of supply of the external cooling liquid flow is such that it generates the flow in a circumferential direction with respect to the tube (T). The discharge aperture (101) is provided at one end of the container (1) and its dimensions are such that they produce a component of the flow in the axial direction with respect to the tube (T) in the external cooling liquid flow.

Method and device for quenching, particularly for steel tubes or similar

A roller for furnaces, is used with a plurality of rollers substantially parallel to each other. The roller is provided with a plurality of annular collars which are side by side and spaced apart. The annular collars are cooled by means of a flow of cooling fluid which is oriented transversely with respect to their axis and parallel to their median plane. The annular riders are made in tubular form and may be of toroidal form and are connected separately each to the supply duct and to the return duct for the cooling fluid. They may also be formed by the individual turns of a tubular spiral or by a number of successive segments of a spiral which are connected via their ends to the supply duct and to the return duct.

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Genoa, Italy

Roberto Millone