Patents Assigned to ARBED Acieries Reunies de Burbach-Eich-Dudelange S.A.
  • Patent number: 4175612
    Abstract: An apparatus for controlling the level of liquid steel in a continuous-casting mold wherein the position of the molten steel level within the mold is detected by a coil juxtaposed therewith and forming part of a resonant circuit controlling an oscillator. The capacitor portion of this resonant circuit is formed at least in part by a coaxial cable connecting the coil to the balance of the oscillator circuit. The output frequency of the oscillator is combined with the signal of a reference oscillator in a modulator, the low-frequency passband of this signal is then transformed into an analog voltage proportional to frequency and is used to control a servomotor which regulates the feed of molten metal to the mold.
    Type: Grant
    Filed: November 15, 1977
    Date of Patent: November 27, 1979
    Assignee: ARBED Acieries Reunies de Burbach-Eich-Dudelange S.A.
    Inventor: Jean Baumert
  • Patent number: 4175985
    Abstract: A steel section 6 to 40 mm thick, emerging from a hot rolling mill at to C. is surface quenched for 2 to 6 seconds at a cooling rate of the order of 1.5 to 5 MW/m.sup.2. During subsequent self-tempering of the quenched surface by heat from the remainder, the section tends to an equalization temperature of to C.
    Type: Grant
    Filed: May 11, 1978
    Date of Patent: November 27, 1979
    Assignees: Centre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie, ARBED Acieries Reunies de Burbach-Eich-Dudelange S.A.
    Inventors: Emile Blondelot, Marios Economopoulos, Stephan H. Wilmotte
  • Patent number: 4171965
    Abstract: Slag sand is produced by first mixing a stream of molten slag with a quantity of between 0.5 m.sup.3 and 0.7 m.sup.3 of water per ton of slag to chill the slag while leaving it above the pyroplasticity threshold. Thereafter water at a rate of between 0.3 m.sup.3 and 0.4 m.sup.3 is added to the slag to stiffen the stream and this stiffened stream is fed to a drum rotating at a rate between 600 rpm and 1000 rpm to break it up into fine granules which are collected on a foraminous belt.
    Type: Grant
    Filed: April 18, 1978
    Date of Patent: October 23, 1979
    Assignee: ARBED - Acieries Reunies de Burbach-Eich-Dudelange S.A.
    Inventor: Robert Schockmel
  • Patent number: 4164469
    Abstract: A method of cleaning phenol-containing waste waters as derived from coke-producing, chemical and other industrial processes comprises treating the waste water, generally without any preconcentration of the phenol content thereof or other prior treatment, with a one-use adsorbent, namely, brown-coal coke. The brown-coal coke is then subjected at least in part to a thermal treatment which can be a coke-producing process or combustion.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: August 14, 1979
    Assignee: ARBED - Acieries Reunies de Burbach-Eich-Dudelange S.A.
    Inventor: Armand Wagner
  • Patent number: 4160168
    Abstract: The level of a metallic bath, e.g. of an iron melt in an ingot mold, is determined by recurrent electro-optical scanning of the interior of the vessel along a narrow vertical strip zone. The output signals of the scanner are processed in an arithmetic unit which averages successive readings, to compensate for fluctuations, and may also receive a corrective signal in order to offset periodic level changes due to an intentional rocking of the vessel. The arithmetic unit may work into a visual indicator and into a controller adjusting the rate of inflow and/or withdrawal to maintain the bath level substantially constant.
    Type: Grant
    Filed: October 26, 1977
    Date of Patent: July 3, 1979
    Assignee: ARBED - Acieries Reunies de Burbach-Eich-Dudelange S.A.
    Inventor: Alfred Funck
  • Patent number: 4103732
    Abstract: The inner surface of a continuous-casting mold is efficiently lubricated by a lubricating ring rotatably held in a respective recess around the upper edge of the mold. The lubricating ring has a ring chamber for receiving the lubricant and radially inwardly directed distribution channels connecting the ring chamber to the inner wall of the mold. The ring is rotated either by a rotating electromagnetic field or by the lubricant supply itself. In the latter embodiment there are wings in the ring chamber and the lubricant is fed into the ring chamber tangentially thereto.
    Type: Grant
    Filed: March 2, 1977
    Date of Patent: August 1, 1978
    Assignees: ARBED, Acieries Reunies de Burbach-Eich-Dudelange S.A., Eschweiler Bergwerks-Verein AG
    Inventor: Dietrich Habert
  • Patent number: 4098128
    Abstract: An acoustic tube having several resonant frequencies is directed into the mouth of a rafining crucible and is heated to above C. A microphone at the remote end of this tube receives sound passing through the tube and generates an electrical output corresponding to the sound received. This electrical output is linearized over a band width including several of the resonant frequencies of the tube and the signal is then passed through a low pass filter to eliminate parasitic oscillations and through a mixer where it is combined with a signal from a local oscillator. The intermediate-frequency signal thus produced is passed through either of a pair of band-pass filters and is displayed. The signal strength at the output is inversely proportional to the depth of slag in the crucible, as the deeper the slag the more sound is absorbed in the crucible.
    Type: Grant
    Filed: October 29, 1975
    Date of Patent: July 4, 1978
    Assignee: ARBED -- Acieries Reunies de Burbach-Eich-Dudelange S.A.
    Inventor: Jean Baumert
  • Patent number: 3966457
    Abstract: Coal of a granulometry of 0.1 to 20 mm is injected into the blast-pipe manifold surrounding an iron-smelting blast furnace. The temperature of between and in this manifold thermally disintegrates the coal by vaporizing volatile components such as water in the coal and reduces the coal to a mesh size of at most 1 mm. The fine particles of coal so produced are blown into the blast furnace through the tuyeres.
    Type: Grant
    Filed: December 5, 1975
    Date of Patent: June 29, 1976
    Assignee: ARBED Acieries Reunies de Burbach-Eich-Dudelange S.A.
    Inventors: Raymond Limpach, Lucien Lorang