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

Fabio Vecchiet

Alfredo Poloni

Milorad Pavlicevic

Fabio Guastini

Nuredin Kapaj

Andrea Codutti

Alessandra Primavera

Michele Minen

Alejandro Sanz Lara

Ferruccio Tomat

Matteo Nobile

Marco Ansoldi

Luca Sandrin

Luciano Vignolo

Marco Schreiber

Riccardo Conte

Guido Carnelutti

Gianluca Caporal

Pierluigi Fabbro

Stefano Puzzo

Alessandro Cona

Manlio Zorzut

A guiding unit for slabs comprising at least two rolls (') connected to each other and adapted to rotate along a same axis X; wherein each roll comprises a first tubular element () and a second tubular element (), which is external and coaxial to axis X and to the first tubular element and removable from said first tubular element; wherein cooling channels () are provided in each roll between said first tubular element and said second tubular element for the passage of a coolant liquid; wherein each roll comprises a respective hub at its two ends; and wherein each hub is provided with cavities communicating with the cooling channels of the respective roll so as to define a path for the coolant liquid from a first end to a second end of the guiding unit crossing said at least two rolls.

Guiding unit for slabs in a continuous casting plant

The device has a gas flow levelling pipe (), which defines a continuous curved development surface (Z), at comprising a collector () to which a nozzle () is fixed, a delivery manifold (), in order to introduce pressurized gas into the pre-chamber () through the holes (), a first holed partition () and a second holed partition () within the levelling pipe (), arranged perpendicular to the curved development surface (Z) of the pipe ().

Device for generating a gas jet in processes for coating metal strips

The present invention relates to a process for controlling the distribution of liquid metal flows of in a crystallizer for the continuous casting of thin slabs. In particular, the process applies to a crystallizer comprising perimetral walls which define a containment volume for a liquid metal bath insertable through a discharger placed in the middle of the bath. The process includes arranging a plurality of electromagnetic brakes, each for generating a braking zone within said bath, and activating these electromagnetic brakes either independently or in groups according to characteristic parameters of the fluid-dynamic conditions of the liquid metal within the bath.

Process and apparatus for controlling the flows of liquid metal in a crystallizer for the continuous casting of thin flat slabs

A roller guiding system for thin strips () at a rolling system outlet which allows a safe guiding without take-off and consequent tipping/folding of the head of the strip and without cobbles even at high feeding speeds. The system of the invention prevents the strip from impacting or sliding on the upper containment devices () or on the rollers () by its upwards or downwards movement, thus avoiding possible damages to the surface, such as scratches or lines. Furthermore, such a guiding system acts on the mechanical-aerodynamic phenomenon which causes instability in the head moving by making a self-centering guiding system which is thus suitable for improving the winding quality of the coil itself.

Guiding system for a metal strip at a rolling mill outlet

An apparatus and process for the dry removal of the scale from the surface of a metal product comprising at least one heating area that does not reduce the specific surface of the material to be treated and does not cause oxidation, at least one reducing area for performing the reaction between a specific reducing gas (normally hydrogen) and at least the scale, at least one cooling area for cooling the metal product, means for heating the metal product, means for heating the reducing gas, means for controlling the fluid dynamics of the boundary layer produced by the flow of said reducing gas over the surface of the metal product, means for removing the reaction products front the reducing gas after the reaction, means for cooling the metal product, and means for removing the reaction products from the treated surface of the metal product.

Apparatus and process for the dry removal of the scale found on the surface of the metal products

A discharge device discharges liquid steel into a roller crystallizer for the continuous casting of thin strip. The discharge device reduces turbulence at the meniscus to a minimum so as to eliminate the relative defects on the cast strip by passing the steel between two crystallizer rollers. A relative casting process provides expedients for improving the steel feeding from a tundish to the crystallizer. Advantageously, the feeding of guided steel jet streams inside the nozzle, or delivery nozzle, eliminates the disturbance at the meniscus caused by the air bubbles which can form when free-falling jet streams come into contact with the air.

Delivery device and method for using the same

An apparatus and process for the dry removal of the scale from the surface of a metal product comprising at least one heating area that does not reduce the specific surface of the material to be treated and does not cause oxidation, at least one reducing area for performing the reaction between a specific reducing gas (normally hydrogen) and at least the scale, at least one cooling area for cooling the metal product, means for heating the metal product, means for heating the reducing gas, means for controlling the fluid dynamics of the boundary layer produced by the flow of said reducing gas over the surface of the metal product, means for removing the reaction products from the reducing gas after the reaction, means for cooling the metal product, and means for removing the reaction products from the treated surface of the metal product.

Apparatus and process for the dry removal of the scale found on the surface of metal products

The following invention relates to an injector-burner for applications in the metalwork field, in particular for use in electric arc furnace melting processes having a frontal head with two series of holes arranged in two concentric crowns, the inner crown of holes used to feed fuel and the outer crown used to supply a supporter of combustion. A central hole is also provided, which is fitted with an oxygen injection nozzle. The holes of the two crowns are divided into groups separated by circular sectors without holes, in order to create a number of flames and are inclined in such a way as to give the gases supplied, and consequentially the flame generated, a rotation around the injector-burner axis. By regulating the flow-rates of the fuel and the supporter of combustion supplied to the various holes, the injector-burner is able to regulate the flame shape in burner mode and also in injection mode, thus guaranteeing optimum performance in all modes.

Injector-burner for metal melting furnaces

An arrangement and conformation of the discharge openings and channels of a continuous-casting nozzle, together with a specific external profile of the body of the nozzle itself, enable slabs of any thickness, in particular from medium to thin ones, to be cast, which have excellent surface quality and are practically free from inclusions and blowholes.

Nozzle for continuous casting

Burner () comprising a head () with two groups of holes (&#x2033;) for the passage of fuel and comburent arranged in circles concentric to the burner axis, in which the various groups () of holes are separated by circular sectors without holes and the axes of the holes are oblique compared with the burner axis (X) to create special forms of flame.

Burner

Apparatus to transport and cool rolled products such as bars, round pieces, rods or similar, arrangable downstream of a coil-forming head, comprising a plurality of transport rollers, at least partly motorized and parallel to each other to define a substantially horizontal transport plane on which the rolled products arranged in coils are able to lie, ventilator in correspondence with the transport rollers to blow air towards the rolled products and a conveyor to convey more air towards the lateral edges of the coils than towards the central zone of the coils, the conveyor comprising a plurality of elements, arranged at intervals between the transport rollers. Each of the elements shaped to define transit channels having a first transverse section greater in correspondence with the ends of the transport rollers and a second transverse section less in correspondence with the median zone of the transport rollers.

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Cervignano del Friuli, Italy

Fabio Vecchiet