Paul Wurth S.a.

Other

Arbed S.a.

Mmtc, Inc.

Paul Wirth S.a.

Pau Wurth S.a.

Paul Wrth S.a.

Sms Siemag Aktiengellschaft

Sms Siemag Aktiengesellschaft

Paul Wurth Refractory & Engineering Gmbh

Paul Wurth Italia S.p.a.

Emile Lonardi

Guy Thillen

Pierre H Mailliet

Giovanni Cimenti

Victor Kremer

Radomir Andonov

Gilbert Bernard

Emile Breden

Edouard Legille

Patrick Hutmacher

Jeannot Loutsch

Philippe Malivoir

Paul Tockert

Jean Metz

Lionel Hausemer

Serge Devillet

Michel Kirchen

Edgar Kraemer

Jean-Jacques Venturini

Daniel D Mawhinney

Marc Solvi

Jean-Luc Roth

Rene N Mahr

Henri Radoux

Leon Ulveling

Hubert Stomp

Louis Schmit

Claude Thinnes

Karl-Rudolf Hegemann

Nicolas Maggioli

Rudy Petry

Norbert Kaell

Georges Wies

Romain Frieden

Jean Liesch

Corneille Melan

Damien Meyer

Charles Hennico

Germain Schilz

Charles Assa

Steve Arendt

Joseph Hollman

Andre Bock

Andre Kremer

Christian De Gruiter

Thomas Hansmann

Paul Goedert

Stefan Schons

Michel Houbart

Harald Lang

Marc Calmes

Jeff Vandivinit

Jeannot Konsbruck

Jean-Joseph Stumper

Christian Benoit Thix

Fred Parasch

Fernand Roemen

Klaus Mutschler

Carlo M Spedener

Benoît Jung

Stefano Pivot

Marc Wies

Paul Berg

Fred Weisgerber

Georges Wahl

Serge Streitz

Gustave Hoelpes

Radmir Andonov

Patrick Milen

Pascal Ferretti

Jean-Jacques Willieme

Theodor Speaight

Georges Reuter

Francis Pott

Andre Boch

Ken Edward

Charles Recher

Joseph Colgon

Hans Bajohr

Michael Kirchen

Luca Spadoni

Philippe Malivior

Joseph Colon

Pol Lemmer

Maurizio Bisogno

Aldo Bologna

Guy Klepper

Jean Gidt

Martin Fobbe

Dominique Rocchi

Lutwin Franziskus

Jorg Brinckmann

Stefano Olivieri

Gérald Hubeaux

Benoit Jung

The invention relates to a heat protection assembly () for a charging installation () of a metallurgical reactor. In order to increase the lifetime of a heat protection shield in a charging installation of a metallurgical reactor, the assembly () comprises a plurality of heat protection tiles () disposed adjacent to each other along a surface The assembly further comprises a plurality of heat protection panels (), each panel () comprising a common base plate () to which a plurality of tiles () are connected, which heat protection panels () are configured to be mounted on the charging installation () adjacent to each other.

Heat protection assembly for a charging installation of a metallurgical reactor

A blast furnace installation includes a blast furnace and a chute transmission gearbox; the blast furnace having a top cone with a top cone ring arranged thereon for receiving a connection flange of the chute transmission gearbox. The connection flange is directly fixed onto the top cone ring by fixing means for establishing a firm connection between the top cone ring and the connection flange. According to an aspect of the present invention, the connection flange is fixed to the top cone ring in three separated fixation regions (), each fixation region including one or more fixing means. According to a further aspect of the present invention, the blast furnace installation also includes a flexible sealing element arranged around the perimeter of the connection between the top cone ring and the chute transmission gearbox.

Blast furnace installation

A spreading device () for the spreading of bulk material on a circular surface comprises a distribution plate () mounted about a central shaft (); at least one radially extending slit () arranged in the distribution plate (); and a scraper device () for spreading the bulk material over the length of the slit (). The bulk material is preferably granular or powdered covering material to be deposited as an insulation layer on the top layer of a casting mold containing molten steel or metal. According to the present invention, a rectangular distribution trough () mounted on the distribution plate (), the slit () being arranged within the distribution trough (). Furthermore, a feed pipe () is arranged so as to feed bulk material into the distribution trough () onto an area corresponding to the rotational center () of the distribution plate. The slit () extends from the rotational center () of the distribution plate () to the edge () thereof. Finally, the scraper device () comprises at least one linearly displaceable scraper () arranged within the distribution trough () so as to feed the bulk material through the distribution trough () radially outwards from the rotational center () of the distribution plate (). The invention also relates to a method for applying a homogeneous layer of material onto a circular surface by using such a spreading device ().

Spreading device for bulk material on a circular surface and method for operating the same

The sealed connection system between a tuyere of a shaft furnace, such as a steelmaking blast furnace, and an air blast pipe, in which a tip of the blast pipe is pressed towards a rear end of the tuyere, being centered thereon while still retaining freedom of pivoting movement relative thereto, including an added annular blast pipe seat, placed between the tip of the blast pipe and tuyere and immobile relative to the tuyere, the blast pipe tip resting against a rear face of the seat and an immobile gasket being placed between the seat and the tuyere such that the seat rests in sealed manner against a rear face of the tuyere, and a sleeve arranged around the contact zone between the blast pipe tip and the seat, is connected in sealed manner to the seat and to the blast pipe.

System of leaktight connection between a tuyere and a hot blast inlet nozzle for a shaft furnace, and steel-making blast furnace comprising such a system

A distribution device for distributing bulk material with a distribution spout on a cardan suspension that has a first and a second gimbal member pivotable about two perpendicular suspension axes where a drive arrangement has a first and a second transmission mechanism for controlling pivotal motion of the distribution spout about the suspension axes, and the drive arrangement has a further cardan joint, with a first part pivotable about a third axis and a second part pivotable about a fourth axis, and a rotary motor for driving a rotary drive shaft that is connected to the cardan joint by means of an articulated connecting arm such that the rotational position and the axial position of the drive shaft determine the pivotal position of the second part about the third and fourth axes respectively, where the transmission mechanisms transmit torque about the third and fourth axes from the cardan joint to the cardan suspension for pivoting the distribution spout about the first and second axes respectively.

Device for distributing bulk material with a distribution spout supported by a cardan suspension

A distribution chute for a charging device, a charging device having the same, and a methods for mounting and dismounting such chute, the chute including an upstream mounting head and a chute body, at least two lateral suspensions on the mounting head for mounting the chute to two corresponding support flanges pivotable about a pivoting axis for raising an outlet to a charging position and for lowering the outlet to a charging position, where the suspensions define a first and a second tilt point about which a weight of the chute exerts torque onto the support flanges of the charging device when the chute is mounted to the charging device, where the ratio of the distance between each of the tilt points and the pivoting axis to the distance between the first and second tilt points amounts to 0.25 at most, the suspensions being arranged so that an oriented acute angle from the longitudinal axis to a plane through the tilt points and the center of gravity has an angular measure in the range from &#x2212;5&#xb0; to 15&#xb0;.

Distribution chute for a charging device

In a charging process of a shaft furnace, in particular of a blast furnace, batches of charge material are typically discharged in cyclical sequence into the furnace from a top hopper using a flow control valve. A method and system is proposed for adjusting the flow rate of charge material in such a process. Pre-determined valve characteristics for certain types of material are provided, each indicating the relation between flow rate and valve setting for one type of material. According to the invention, a specific valve characteristic is stored for each batch of charge material, each specific valve characteristic being bijectively associated to one batch and indicating the relation between flow rate and valve setting of the flow control valve specifically for the associated batch. In relation to discharging a given batch of the sequence the invention proposes: using the stored specific valve characteristic associated to the given batch for determining a requested valve setting corresponding to a flow rate setpoint and using the requested valve setting to operate the flow control valve; determining an actual average flow rate for the discharge of the given batch; correcting the stored specific valve characteristic associated to the given batch in case of a stipulated deviation between the flow rate setpoint and the actual average flow rate.

Method and system for adjusting the flow rate of charge material in a charging process of a shaft furnace

A shaft furnace charge material distribution device includes a main housing, a distribution chute, a suspension rotor and an adjustment rotor, which are rotatable about a vertical axis. The chute is suspended to the suspension rotor to rotate therewith for circumferential distribution of charge material and is adjustable in orientation for radial distribution of charge material. A differential gear interconnects the suspension rotor and adjustment rotor and is configured to transmit to the adjustment rotor the same speed of rotation that is imparted to the suspension rotor by a main rotation drive unless an adjustment drive imparts differential rotation to the adjustment rotor. The device includes two gear casings arranged on the main housing and a shaft arrangement. The first gear encloses a gear mechanism connecting the main rotation drive to one output shaft. The second gear casing encloses the differential gear connecting the adjustment drive to another output shaft.

Device for distributing charge material into a shaft furnace

In a charging process of a shaft furnace, in particular of a blast furnace, batches of charge material are typically discharged in cyclical sequence into the furnace from a top hopper using a flow control valve. A method and system is proposed for adjusting the flow rate of charge material in such a process. According to the invention, a respective set of plural valve settings is stored for each batch, each valve setting of a set being associated to a different stage in the discharge of the batch. The method and system are configured to discharge a given batch so that, at each stage in the discharge of the given batch, the flow control valve operates at a constant valve opening according to the valve setting associated to that stage and so that an actual average flow rate at which charge material is discharged is determined for that stage. Further according to the invention, the method and system are configured to correct the plural valve settings offline and in function of the actual average flow rate determined for the associated stage.

A coke oven offtake piping system includes a pipe assembly for conveying coke oven gases from a coke oven to a collecting main, at least one spraying nozzle in the pipe assembly, and a discharge section with a discharge pipe having a discharge orifice. A gate member cooperates with the discharge orifice and is movable along the discharge orifice in order to present a closing surface to the extremity thereof, whereby the opening area of said discharge orifice can be varied for controlling the flow rate to the collecting main. The gate member is a spherical cap with a concave closing surface. The gate member is configured to pivot around a pivoting axis to expose the discharge orifice and to cover the discharge orifice, respectively.

Coke oven offtake piping system

A multiple hearth furnace including a rabble arm with a tubular structure and a solid plug body. The latter is received in a socket arranged in an arm fixing node. It has an axial through boring and cooling fluid supply and return channels arranged around this through boring. A clamping bolt is rotatably fitted in the through boring. It has a bolt head, which can be brought by rotation into and out of hooking engagement with an abutment surface on the arm fixing node. A threaded end of the clamping bolt sticks out of the through boring at the rear end of the plug body. A threaded sleeve, which is screwed onto this threaded end, bears on an abutment surface at the rear end of the plug body for exerting a clamping force onto the clamping bolt.

Multiple hearth furnace

A charging device () for distributing bulk material in an enclosure, in particular in a shaft furnace comprises a stationary housing () that supports a rotatable structure () carrying adjustable distribution means (). Distribution of bulk material in circumferential direction is achieved by rotation of the distribution means () together with the rotatable structure (). Distribution of bulk material in radial direction is achieved by adjustment of the distribution means (). For rotating the distribution means, usually about the central axis (A) of the charging device, the device () includes a first rolling bearing () with a first stationary race () that bears a first rotary race (). The first rotary race is coupled to a first gear ring () that cooperates with a first drive () for rotating the rotatable structure and thereby the distribution means. For adjusting the distribution means, the device includes a second rolling bearing () having a second stationary race () that bears a second rotary race (). The second rotary race is coupled to a second gear ring () that cooperates with a second drive () for adjusting the distribution means. According to the invention, the first rotary race () is arranged radially inward with respect to the second rotary race (), the first stationary race () is arranged radially inward with respect to the second stationary race () and the second rolling bearing () axially overlaps the first rolling bearing ().

Charging device for distributing bulk material

A three hopper charging installation for a shaft furnace includes a rotary distribution device for distributing bulk material in the furnace by rotating a distribution member about the furnace central axis and a first, a second and a third hopper arranged in parallel above the rotary distribution device and offset from the central axis. A sealing valve housing is arranged between the hoppers and the distribution device. It has a top part with a first, a second and a third inlet respectively communicating with the first, the second and the third hopper. A first, a second and a third sealing valve are provided in the top part. Each sealing valve includes a flap which is pivotable between a closed sealing position and an open parking position. The sealing valve housing also has a funnel shaped bottom part with an outlet communicating with the distribution device. According to the invention, the top part of the sealing valve housing has a tripartite stellate configuration in horizontal section with a central portion, in which the inlets are arranged adjacently in triangular relationship about the central axis, and with a first, a second and a third extension portion, each sealing valve being adapted such that its flap opens outwardly with respect to the central axis by pivoting into a parking position located in the first, second or third extension portion respectively.

Three hopper charging installation for a shaft furnace

A charging device for a shaft furnace, which includes at least one charging hopper having a discharge orifice arranged in a position off-centre with respect to the central axis of the shaft furnace, and a material distribution device arranged below this hopper. The material distribution device includes a feed channel coaxial with the central axis of the furnace and a rotatable, pivotable chute, which is arranged below the feed channel for distributing a charge in the shaft furnace. The charging device also includes a connecting box in the shape of a funnel, arranged between the material distribution device and the charging hopper. The connecting box possesses a lower central outlet communicating with the charging hopper and at least one upper inlet which is arranged off-centre with respect to the central axis of the furnace and communicates with the discharge orifice of the hopper. According to the invention, the charging device includes at least one spreader situated upstream of the distribution device, on the trajectory of the material discharged from the discharge orifice. The spreader enables a flow of material to be dispersed to both sides of the feed channel.

Charging device for a shaft furnace

A multiple hopper charging installation for a shaft furnace includes a rotary distribution device for distributing bulk material in the shaft furnace by rotating a distribution member about a central axis of the shaft furnace and at least two hoppers arranged in parallel and offset from the central axis above the rotary distribution device. Each hopper has a lower funnel part ending in an outlet portion and each hopper has a material gate valve with a shutter member associated to its outlet portion. According to the invention, each funnel part is configured asymmetrically with its outlet portion being eccentric and arranged proximate to the central axis, each outlet portion is oriented vertically so as to produce a substantially vertical outflow of bulk material and each material gate valve has a one-piece shutter member and is configured with its respective shutter member opening in a direction pointing away from the central axis such that any partial valve opening area is located on the side of the associated outlet portion proximate to the central axis.

Multiple hopper charging installation for a shaft furnace

Growing community of inventors

Bascharage, Luxembourg

Emile Lonardi