Search Patents
  • Patent number: 4469510
    Abstract: A method of producing molten iron in which iron oxide is fed together with carbon to an oxygen-top-blown melt from below through blocks whose pores permit the particles to be entrained into the melt in a carrier gas, the pores preventing penetration of the molten metal.
    Type: Grant
    Filed: April 21, 1982
    Date of Patent: September 4, 1984
    Assignee: Arbed S.A.
    Inventors: Paul Metz, Edouard Legille, Francois Schleimer, Antoine Weiner
  • Patent number: 4157816
    Abstract: Cooling of the wall of a shaft furnace is achieved through the use of a plurality of individual cooling elements, through which a coolant may be circulated, which cooperate to form a lining immediately inwardly of the furnace metal shell. The cooling elements are supported on the shell, rather than being secured thereto, and may be replaced by removal through openings in the shell which are normally hermetically sealed by covers.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: June 12, 1979
    Assignee: S.A. des Anciens Etablissements Paul Wurth
    Inventor: Edouard Legille
  • Patent number: 4061036
    Abstract: A device for the extraction of gaseous samples and for thermal measurement above the burden of a shaft furnace includes at least one probe arm resonantly positioned in a horizontal plane above the burden. Means are provided for pivoting the probe arm above the burden from a rest position juxtaposed the furnace wall so that the entire surface of the burden can be scanned.
    Type: Grant
    Filed: July 20, 1976
    Date of Patent: December 6, 1977
    Assignee: S.A. des Anciens Etablissements Paul Wurth
    Inventor: Edouard Legille
  • Patent number: 4290067
    Abstract: A non-contacting surface contour measurement device includes movable member which can selectively be actuated to form a hermetic enclosure about a transmit and/or receive antenna. The measurement device, when employed in a blast furnace, need be exposed to the furnace environment only during measuring modes which constitute a small portion of the furnace operating cycle.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: September 15, 1981
    Assignee: Paul Wurth, S.A.
    Inventors: Edouard Legille, Victor Kremer
  • Patent number: 4437796
    Abstract: A pulverized combustible material or ore is transported from a storage container, at atmospheric pressure, to the interior of a pressurized shaft furnace via three intermediate receptacles. The material is weighed in the first receptacle, pneumatically transported to the second receptacle, the second receptacle pressurized and the material transmitted under pressure to the third receptacle which is maintained at a pressure which is higher than the furnace pressure.
    Type: Grant
    Filed: June 11, 1980
    Date of Patent: March 20, 1984
    Assignee: Paul Wurth S.A.
    Inventors: Leon Ulveling, Edouard Legille, Jean Boever
  • Patent number: 4023832
    Abstract: Segmented conduits for transmitting heated fluid, and particularly tuyere feed lines for injecting preheated air into shaft furnaces, have an annular cooling chamber incorporated into the coupling joints between conduit sections. The cooling chambers are positioned inwardly toward the conduit axis with respect to flexible bellows devices which heremetically seal the articulated coupling joints.
    Type: Grant
    Filed: September 16, 1975
    Date of Patent: May 17, 1977
    Assignee: S.A. des Anciens Etablissements Paul Wurth
    Inventors: Edouard Legille, Rene N. Mahr
  • Patent number: 4822229
    Abstract: An installation for charging a shaft furnace equipped with a distribution spout, several storage containers, a sluicing system and a valve cage is presented. The containers are arranged next to each other and are horizontally displaceable between a first position aligned on the vertical axis of the shaft furnace, where the material is unloaded; and a second position laterally separated from the vertical axis of the shaft furnace, where the containers are filled.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: April 18, 1989
    Assignee: Paul Wurth S.A.
    Inventors: Edouard Legille, Emile Lonardi, Germain Schilz
  • Patent number: 4273492
    Abstract: A furnace charging device with a fixed feed channel is positioned in the center of the furnace head. A distribution spout is pivotably supported under the fixed feed channel and has a control rod attached to the spout. A driving means is provided so that the control rod which consist of two telescopic elements may be lengthened or shortened and at the same time may be rotated along with the spout as one assembly around the vertical axis of the furnace.
    Type: Grant
    Filed: August 9, 1979
    Date of Patent: June 16, 1981
    Assignee: Paul Wurth, S.A.
    Inventors: Edouard Legille, Pierre Mailliet
  • Patent number: 4071166
    Abstract: A method for the controlled delivery of ore charges to a shaft furnace is disclosed. The method employs apparatus including a plurality of sensors on which an intermediate charge storage hopper is supported whereby continuous measurement of charge weight is permitted. The apparatus also includes means for establishing hermetic coupling of the storage hopper to the furnace whereby compensation for temperature and pressure induced positional displacements and biasing of the sensors is permitted.
    Type: Grant
    Filed: March 6, 1973
    Date of Patent: January 31, 1978
    Assignee: S.A. des Anciens Etablissements Paul Wurth
    Inventors: Edouard Legille, Rene N. Mahr
  • Patent number: 4820105
    Abstract: The apparatus comprises a distribution spout and a hopper which has two containers mounted thereabove provided with sealing valves and a metering member. In order to simplify the weighing system, the hopper is independent of the mouth of the furnace and is located inside a sealed chamber. The hopper is suspended by a device which enables it to be coupled to the container which is being emptied and to be uncoupled from the container which is being filled.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: April 11, 1989
    Assignee: Paul Wurth, S.A.
    Inventors: Edouard Legille, Emile Lonardi, Germain Schilz
  • Patent number: 4162784
    Abstract: The pressurization and depressurization of a container, and specifically a feed hopper for materials to be delivered to the interior of a blast furnace, is accomplished with the aid of pressure equalization devices which each include a valve and a wear and sound reducing mechanism immediately downstream of the valve. The wear and sound reduction mechanism subdivides the stream of gas, which may contain entrained particulate matter, into a plurality of jets which are caused to follow a zig-zag trajectory.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: July 31, 1979
    Assignee: S.A. des Anciens Etablissements Paul Wurth
    Inventors: Edouard Legille, Rene N. Mahr, Carlo Heinz
  • Patent number: 4493600
    Abstract: The movements of an oscillatory member, for example the charge distribution spout of a furnace charging system, are caused to follow the movements of a remotely located control device which may be in the form of an elongated arm. The spout and arm are rotatable about respective pairs of orthogonal axes and any angular deviations between the orientation of the control device arm and spout axis are sensed. Control signals commensurate with the angular deviations are delivered to fluidic actuators which reposition the spout.
    Type: Grant
    Filed: April 14, 1982
    Date of Patent: January 15, 1985
    Assignee: Paul Wurth S.A.
    Inventors: Edouard Legille, Pierre Mailliet
  • Patent number: 4253485
    Abstract: A valve for opening and closing a fluid conduit of the type having a generally wide cross section, the conduit having a transverse slit therein to allow for movement of a shut-off plate therethrough. The shut-off plate has a spherical shape and defines a center about which the shut-off plate may be arcuately displaced to close the conduit when the plate is positioned within the conduit and to open the conduit when the plate is positioned external to the conduit.
    Type: Grant
    Filed: May 26, 1978
    Date of Patent: March 3, 1981
    Assignee: Paul Wurth, S.A.
    Inventor: Edouard Legille
  • Patent number: 4152243
    Abstract: A process for treating bituminous schists including the steps of crushing the bituminous schist, feeding said schist to the top of a retort, pyrolyzing the crushed schist in said retort as it is moved downwardly therein through a combustion zone into which air is introduced, removing volatiles from the upper part of the retort, and removing spent schist from the bottom of the retort, said process being characterized by maintaining the combustion zone at a predetermined level in the retort by feeding the schist in a gradual and even manner.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: May 1, 1979
    Assignee: S.A. des Anciens Etablissements Paul Wurth
    Inventors: Edouard Legille, Rene Mahr
  • Patent number: 4514129
    Abstract: The delivery of charge material to the hearth of a pressurized blast furnace under the influence of gravity is accomplished without the necessity of changing the direction of material flow at a point exterior of the furnace. The rate of flow of the charge material, which moves in a vertical stream, is controlled by a metering device including a pair of overlapping register elements which define a variable size aperture which remains generally symmetrical with respect to the stream axis.
    Type: Grant
    Filed: March 8, 1982
    Date of Patent: April 30, 1985
    Assignee: Paul Wurth S.A.
    Inventors: Edouard Legille, Pierre Mailliet, Emile Lonardi
  • Patent number: 4575790
    Abstract: A method and apparatus for controlling the movement of an oscillating spout is presented wherein uneven distribution of spout discharge material is eliminated or at least substantially reduced by a compensating action of varying the angular speed of rotation of the spout in accordance with the angular position of the spout. The present invention is particularly suited for use in conjunction with a charging installation of a shaft furnace, particularly those charging devices having a spout with a cardan suspension system.
    Type: Grant
    Filed: July 21, 1983
    Date of Patent: March 11, 1986
    Assignee: Paul Wurth S.A.
    Inventors: Edouard Legille, Guy Thillen, Emile Lonardi
  • Patent number: 4074816
    Abstract: A charge metering system for a shaft furnace is disclosed. The furnace charging apparatus includes means for continuously measuring the charge material in a supply hopper and a metering valve for controlling the material flow rate from the supply hopper. In order to permit accurate charge weight measurement the supply hopper is isolated from dimensional displacements which may be induced in the furnace and associated equipment during operation by means of an articulated suspension system comprising a three hinged arch construction.
    Type: Grant
    Filed: March 6, 1973
    Date of Patent: February 21, 1978
    Assignee: S.A. des Anciens Etablissements Paul Wurth
    Inventor: Edouard Legille
  • Patent number: 4151047
    Abstract: Apparatus for feeding bituminous schist to a series of retorts each equipped with a rotary distribution spout and a central feed channel, the retorts radiating from a central schist distributing tower. At least one hopper communicates with a central feed channel communicating with the retort, and is laterally offset relative to the longitudinal axis of the retort. Conveyor belts are provided for conveying schists from the central distributing tower to the hopper or the hoppers of each retort.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: April 24, 1979
    Assignee: S.A. des Anciens Etablissements Paul Wurth
    Inventors: Edouard Legille, Rene Mahr
  • Patent number: 4306828
    Abstract: An isolation and flow control valve in a furnace charging installation, installed in a discharge conduit of a storage hopper which may be alternately at ambient pressure for loading and furnace pressure for discharging, is characterized by a valve member which is caused to move serially in two directions during opening and closing. The movement is produced by an actuator mechanism including a pivot arm and a cam system and results in movement axially with respect to the conduit for seating and unseating and generally transverse to the conduit axis for controlling material flow through the conduit.
    Type: Grant
    Filed: August 8, 1979
    Date of Patent: December 22, 1981
    Assignee: Paul Wurth S.A.
    Inventors: Edouard Legille, Romain Frieden
  • Patent number: 4074835
    Abstract: Apparatus including a channel defining member and a movable flow control device cooperating therewith for exercising variable control over the rate of delivery of charge material from a hopper to a furnace is disclosed. The channel defining member approximates an oval shape and the flow control device is a concave shaped member which rotates from a full open to a full closed position along the major axis of the oval and with respect to the discharge end of the channel defining member.
    Type: Grant
    Filed: March 6, 1973
    Date of Patent: February 21, 1978
    Assignee: S.A. des Anciens Etablissements Paul Wurth
    Inventors: Edouard Legille, Rene N. Mahr
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