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  • Device for introducing dosed quantities of pulverized solid materials into a carrier gas stream
    Patent number: 4606677
    Abstract: A device for introducing dosed quantities of pulverized solid materials into a carrier gas stream is presented. The device is particularly suitable for injecting solid fuels into a shaft furnace during metal refining. The device comprises a housing which defines a flow chamber in the axial direction for the flow of pressurized fluid or carrier gas. The housing also has a side aperture therethrough. The side aperture is connected to a container holding pulverized materials. Coaxial inner and outer sleeves, at least one of which is capable of rotation, are located within the housing. The outer sleeve communicates with the aperture while the inner sleeve has an axial bore which provides a passage for the carrier gas. Upon rotation of a sleeve, slots provided on each sleeve will align and overlap with each other and with the aperture to define a variable sized passage between the container and axial bore whereby the pulverized material is delivered therethrough to the carrier gas stream.
    Type: Grant
    Filed: November 10, 1983
    Date of Patent: August 19, 1986
    Assignee: Paul Wurth S.A.
    Inventors: Edouard Legille, Leon Ulveling, Pierre Mailliet
  • Device for introducing dosed quantities of pulverized solid materials into a carrier gas stream
    Patent number: 4601617
    Abstract: A device for introducing dosed or proportioned quantities of pulverized solid materials into a carrier gas stream is presented. The device comprises a housing which defines a flow chamber in the axial direction for the flow of pressurized fluid or carrier gas. The housing also has a side aperture therethrough. The side aperture is connected to a container holding pulverized materials. Coaxial inner and outer sleeves, at least one of which is capable of rotation, are located within the housing. The outer sleeve communicates with the aperture while the inner sleeve has an axial bore which provides a passage for the carrier gas. Upon rotation of a sleeve, slots provided on each sleeve will align and overlap with each other and with the aperture to define a variable sized passage between the container and axial bore whereby the pulverized material is delivered therethrough to the carrier gas stream.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: July 22, 1986
    Assignee: Paul Wurth S.A.
    Inventors: Edouard Legille, Leon Ulveling, Pierre Mailliet
  • Treatment of metallurgical slag
    Patent number: 4153440
    Abstract: Disclosed is a process for the treatment of metallurgical slag, the process comprising mechanical disintegration of a current of pyroplastic slag formed by initial cooling of a current of melting slag by means of water. This cooling comprises a first cooling phase taking place in the course of the flow of a continuous current of slag through an inclined channel into which a variable quantity of water is injected by pressure through the base, and a second cooling phase taking place during the largely free fall of the flow of slag onto a disintegration device. The initial slag cooling phase is accelerated or decelerated in accordance with the properties of the slag, and the intensity and/or duration of the mechanical disintegration is modified in accordance with the physical and granulometric properties of the slag required.A further aspect of the invention provides an installation for the performance of the process as set forth above.
    Type: Grant
    Filed: April 6, 1978
    Date of Patent: May 8, 1979
    Assignee: Paul Wurth S.A.
    Inventors: Edouard Legille, Paul Metz
  • Device for introducing dosed quantities of pulverized solid materials into a carrier gas stream
    Patent number: 4605342
    Abstract: A device for introducing dosed quantities of pulverized solid materials into a carrier gas stream is presented. The device is particularly suitable for injecting solid fuels into a shaft furnace during metal refining. The device comprises a housing having oppositely disposed inlet and outlet radial apertures therethrough. The inlet radial aperture is connected to a container holding pulverized materials. Coaxial inner and outer sleeves, at least one of which is capable of rotation, are located within the housing. Upon rotation of a sleeve, pairs of oppositely disposed slots provided on each sleeve will align and overlap with each other and with the pair of oppositely disposed apertures to define variable sized passages. A cheek positioned on one end of the housing has a cylindrical extension portion which extends axially into the inner sleeve and extends across the inlet and outlet apertures.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: August 12, 1986
    Assignee: Paul Wurth S.A.
    Inventors: Edouard Legille, Leon Ulveling, Pierre Mailliet
  • Device for introducing dosed quantities of pulverized materials into a carrier gas stream and application thereof to a distribution tank for pulverized materials
    Patent number: 4597694
    Abstract: A device for introducing dosed or proportioned quantities of pulverized solid materials into a carrier gas stream is presented. The device comprises a housing which defines a flow chamber in the axial direction for the flow of pressurized fluid or carrier gas. The housing also has a side aperture therethrough. The side aperture is connected to a container holding pulverized materials. Coaxial inner and outer sleeves, at least one of which is capable of rotation, are located within the housing. The outer sleeve communicates with the aperture while the inner sleeve has an axial bore which provides a passage for the carrier gas. Upon rotation of a sleeve, slots provided on each sleeve will align and overlap with each other and with the aperture to define a variable sized passage between the container and axial bore whereby the pulverized material is delivered therethrough to the carrier gas stream.
    Type: Grant
    Filed: April 27, 1984
    Date of Patent: July 1, 1986
    Assignee: Paul Wurth S.A.
    Inventors: Edouard Legille, Pierre Mailliet, Jeannot Loutsch, Jean-Pierre Welter
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