Paul Wurth S.a.

Other

Serge Devillet

Daniel Fries

Hubert Stomp

Emile Lonardi

Andre Kremer

Carlo Heintz

Guy Thillen

Paul Tockert

Jean-Luc Roth

Claude Thinnes

Norbert Kaell

Stefan Schons

Jean Monai

Jeff Vandivinit

Fred Parasch

Marc Reichert

Dominique Rocchi

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 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

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

A method for feeding fines or granules into a light-arc furnace. A hollow electrode provided with a feeding channel is utilized, and is preferably a hollow S&ouml;derberg electrode. A conveyor introduces the fines or granules into the feeding channel so as to maintain in the feeding channel a hollow material in which a lower end is smelted in a molten metal bath.

Method for feeding fines or granules into a light-arc furnace

A device for coupling a blow lance with a header is disclosed, in which the force required for producing a sealing joint between the header (2) and the lance (4) is exerted by a cooling fluid and/or a blowing fluid. In a preferred embodiment, said cooling fluid and/or blowing fluid acts via a pressure surface (32) on the joint between the header (2) and the lance (4), the pressure surface being integral with a piston (22) which transmits the pressure to said joint. The lance has preferably a first coupling surface (12), while the header (2) has a second coupling surface (14), and one of said coupling surfaces (12 or 14) is integral with said piston (22).

Device for coupling a blowing lance to a collector

Device for charging an electric furnace

An apparatus is provided for supplying media to a blowing lance, particularly a blowing lance used in the production of steel by a top blowing process. A vertically movable lance carrier comprises a media connection device having a vertical connection surface. Before coupling, the blowing lance is first locked on the lance carrier by a fastening device. The connection device is movable horizontally in guide rails on the lance carrier from a waiting position towards the coupling head of the blowing lance.

Apparatus for supplying media to a blowing lance

The present invention relates to drives for an automatic lance-changing devices. In accordance with the present invention, the drive effects the coupling of lances used for supplying media by pressing them against a coupling head which, in turn, is accomplished by draw rods which are operated with the aid of lifting spindle movement transmitting screw thread systems. Each draw rod has associated with it its own reduction gear unit which has an integrated lifting spindle system and on which a load cell is mounted. The primary shafts, in alignment with one another, of the two gear units are connected together by a coupling which compensates for axial, radial and angular displacements.

Drive for automatic lance change devices

The invention relates to a drive for an automatic lance-changing device, such as is used in the top-blowing steel-making process. Such a lance-changing device comprises two lance-receiving hooks pivotable about a horizontal axis of rotation, means for the synchronous vertical displacement of these hooks relative to the lance carriage and to the coupling head, means which, during this displacement of the hooks, cause these hooks to execute a pivoting movement about their said axis of rotation, and means for detecting by measurement the load acting on each hook, the latter being a function of the force with which the lance top part is pressed against said coupling head by the hooks. The drive of this invention is a lifting-spindle system, by means of which a vertically displaceable suspension ring for suspension hooks of the lance top part is driven. This lifting-spindle system consists of at least two tie rods, the upper ends of which are equipped with an external movement thread, and of at least two gearwheels, the hubs of which are equipped with a corresponding internal movement thread for interaction with said upper ends. These gearwheels are mounted axially/radially in a gear case which itself rests on load cells. The latter cause the lifting-spindle drive to be switched off automatically when a predetermined pressure force between the lance top part and a coupling head is reached.

Drive for automatic lance changing devices

A device for automatically coupling a lance for injecting a fluid into a molten metal bath to a manifold for supplying the fluid to the lance includes means for hitching the lance rigidly to a lance-carrying carriage which can be displaced along a slide rail, and means ensuring the support of the manifold with respect to the lance-carrying carriage and enabling the manifold to be displaced vertically with respect to the lance-carrying carriage, or vice versa.

Device for the automatic coupling of a blowing-in lance to a manifold

Automatic lance changing apparatus

An automatic lance changeover device is presented wherein a radially guided ring is axially vertically displaceable by two lifting spindle systems provided on each side of the ring and bears pivotable hooks for receiving the lance and for pressing the latter axially against a sealing surface on the coupling head. The hooks are connected to the stationary coupling head via pivotable connecting rods whose length is alterable, these connecting rods being eccentrically articulated on the support pin of the hooks with the bearing bore at the coupling head end of the connecting rods having a larger diameter than the associated wrist pin. When the ring is axially displaced, the hooks, which have swung out, in a first phase, initially surround the supporting pins on the upper part of the lance as the ring is displaced further, the hooks, without executing any further pivoting movement, pull the lance head into sealing contact with the coupling head.

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Buerden, Luxembourg

Serge Devillet