• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PURPOSE: A nozzle which improves the known solutions of the prior art and ensures a nearly trouble-free running out of the molten metals into a further melt crucible is provided. CONSTITUTION: In a refractory nozzle for arrangement in or on a wall of a metallurgical crucible, particularly for steel melts, the nozzle comprises a discharge duct surrounding a flow passage, the discharge duct having a surface delimiting the flow passage and an outer housing(4), the discharge duct having an upper part(10) and a lower part(6) with the lower part(6) being fixed on or in the upper part(10), wherein the flow passage is configured differently in the upper part and the lower part by at least one of the following: (a) the surface of the upper part(10) delimiting the flow passage(2) being made of a different material than the surface of the lower part(6) delimiting the flow passage(2) and (b) a diameter of the flow passage(2) in the upper part(10) being larger than a diameter of the flow passage(2) in the lower part(6).
    公开号:KR20030007126A
    申请号:KR1020020040330
    申请日:2002-07-11
    公开日:2003-01-23
    发明作者:켄달마틴；할램크리스
    申请人:헤라우스 일렉트로-나이트 인터내셔날 엔. 브이.；
    IPC主号:
    专利说明:

    Fireproof Nozzles {REFRACTORY NOZZLE}
    [14] The present invention is a fireproof nozzle disposed in or on a wall of a metallurgical crucible, comprising a flow passage and a discharge duct surrounding the flow passage, the discharge duct having a surface partitioning the flow passage and the outer housing, In particular, it relates to the fire nozzle for molten steel. Such a device is needed in the casting industry to allow molten metal, especially molten steel, to exit the melting crucible.
    [15] Devices of this type are known, for example, from British Patent Publication No. 2 157 210 A. This document describes so-called immersion nozzles in which molten steel flows from the upper crucible into the lower crucible, where the nozzle or spout is immersed in the melt of the lower crucible. The device includes a gas feed through which any gas can enter the metal stream. This may be desirable in some circumstances, but in most cases, i.e., when the melt properties are affected in an undesirable and undesired way because of such circumstances. In the case of such a nozzle, by so-called stopper rods descending into the upper opening to close the opening or opening the opening in whole or in part over the device, or laterally across the cross section of the nozzle, The flow is regulated by a slide that closes the nozzle by pushing in the orthogonal direction. Such a control method is relatively inaccurate and mechanically expensive. In addition, turbulence usually occurs in the metal flow, which causes metal to pass through to the nozzle walls.
    [16] Similar nozzles are described in Japanese Patent Laid-Open No. 61-42899 or European Patent Publication No. 379 647 B1.
    [17] It is an object of the present invention to use a nozzle that improves the known solution of the prior art and ensures that the flux comes out with little turbulence and into another melting crucible.
    [1] 1 is a schematic cross-sectional view of a fireproof nozzle according to the invention.
    [2] <Explanation of symbols for the main parts of the drawings>
    [3] 1: nozzle
    [4] 2: flow passage
    [5] 3: crucible
    [6] 4: housing
    [7] 5: hole
    [8] 6: lower part
    [9] 7: heater
    [10] 8a, 8b: connection part
    [11] 9: fireproof material
    [12] 10: upper part
    [13] 11: transition region
    [18] According to the invention, the object is that the discharge duct has an upper portion and a lower portion, the surface of the upper portion defining the flow passage is made of a material different from the surface of the lower portion defining the flow passage, the lower portion being Achievement is achieved by a nozzle of the type mentioned at the outset, characterized in that it is fixed within or on the upper part, where the term 'other material' refers to the composition or structure of the material.
    [19] Another embodiment of the present invention provides that the discharge duct has an upper portion and a lower portion, the lower portion being fixed inside or on the upper portion and the diameter of the flow passage is larger in the upper portion than the lower portion. It features. By exhaust duct is meant a part in which the inner surface is preferably cylindrical or conical, or in which through-holes in which various types of surfaces are combined are formed.
    [20] With the characteristic structure of the present invention, it is possible to secure an optimal passage of the molten metal passing through the nozzle. With different material configurations, the adhesion of the molten metal is reduced or even completely avoided. First of all, the metal flow can be corrected by making the diameter of the flow passage of the lower part smaller, which increases the flow rate. Next, the pressure build-up is prevented because the solvent accumulates in the upper part, and as a result no gas can penetrate into the flowing liquid through the wall of the nozzle. A turbulent flow is obtained, and almost completely avoids sticking to the nozzle wall.
    [21] In particular, the material partitioning the flow passage and constituting the upper portion has a high degree of thermal insulation, high purity, chemical inertness to the steel and high heat resistance at a temperature of at least about 1400 ° C. to 1600 ° C. (ie steel production temperature). The material of the lower part forming the flow passage is preferably refractory ceramic. 'High thermal insulation' means materials with thermal conductivity up to 1.5 Wm -1 K -1 , 'high purity' means purity higher than 99 wt%, and 'high heat resistance' means melting point It means the material which is 1800 degreeC or more. This ensures that no heat is lost from the melt and the melt is not contaminated. On the other hand, such a device has long term stability with respect to the molten metal.
    [22] In particular, when the material partitioning the flow passage in the lower part is formed of aluminum oxide or zirconium dioxide and preferably partitions the flow passage with a dense surface, and the material partitioning the flow passage in the upper part is a refractory oxide, foam ceramic Particularly preferred when composed of a hollow material consisting of a fiber material or a dense material in which at least one of these materials is grafted, an aluminum oxide sphere, and a mixture thereof Do. The surface of this material should suitably be dense in the region of the flow passage, in particular in the upper part. This material itself or its filler material can be porous.
    [23] The material of the upper part partitioning the flow passage may consist essentially of a mixture formed mainly of aluminum oxide and graphite. The material of the upper part may also use mullite, zirconium dioxide or calcium oxide. Preferably, the housing may be formed of metal, in particular steel, ceramic or other refractory material to ensure high strength. In particular, the forced housing prevents unwanted gas penetration.
    [24] Suitably, the material of the lower portion that partitions the flow passage is at least partially surrounded by a heater to preheat the nozzle and to suppress thermal stress or promote flow without adhesion. The heater is preferably composed of one or more materials selected from the group consisting of molybdenum, carbon, nickel-chromium, iron-chromium-aluminum. It is desirable to have a high insulating material disposed between the heater and the housing to avoid heat leakage. In order to obtain the advantages described above in connection with the second embodiment of the invention, it is preferred that the diameter of the flow passage in the lower portion is smaller than the diameter of the flow passage in the upper portion.
    [25] Best Mode for Carrying Out the Invention Embodiments of the present invention will be described below with reference to the drawings.
    [26] The figure is a schematic cross section of a fireproof nozzle according to the invention. A crucible for receiving molten steel is disposed above the nozzle 1, and molten steel flows from the crucible into a melting crucible 3 disposed below the nozzle 1 through the flow passage 2. The nozzle is enclosed in a forced housing 4, the lower end of which is provided with a hole 5, the diameter of which is at least as large as the diameter of the lower part 6 of the furnace. The lower portion 6 of the nozzle is made of zirconium dioxide (zirconia) and has an inner diameter of about 13 to 16 mm. The lower part 6 is surrounded by the heater 7 provided with the connection parts 8a and 8b. A high thermal insulation material 9 is arranged between the heater 7 and the housing 4 to avoid outward heat loss.
    [27] The material of the upper part 10 is for example aluminum oxide. The flow passage 2 has a diameter of the upper portion 10 about 30 to 40 mm larger than the diameter of the lower portion 6. This flow passage 2 is tapered conically toward the lower part in the transition region 11.
    [28] Since the nozzle can be closed at its upper end by a stopper rod or slide which fully opens or completely closes it, the device according to the invention eliminates the aforementioned disadvantages due to partial opening and thus adjustment.
    [29] According to the present invention, it is possible to ensure an optimal passage of the molten metal passing through the nozzle by a characteristic structure which is divided into an upper portion and a lower portion having a flow passage, and the lower portion is fixed to the inside or the surface of the upper portion. In addition, the surface of the upper portion that partitions the flow passage is composed of a material of a composition or tissue that is different from the surface of the lower portion that partitions the flow passage so that adhesion of the solvent can be reduced or even completely avoided. Metal flow can be corrected by making the diameter of the flow passage of the lower portion smaller than the diameter of the flow passage of the upper portion, thereby increasing the flow rate. In addition, the pressure builds up in the upper portion, so that a pressure drop is prevented, and as a result no gas can penetrate through the nozzle wall into the flowing liquid. A turbulent flow can be obtained and almost completely avoiding sticking to the nozzle wall.
    权利要求:
    Claims (9)
    [1" claim-type="Currently amended] A refractory nozzle disposed in or on a wall of a metallurgical crucible having a flow passage and a discharge duct surrounding the flow passage, the discharge duct having a surface defining the flow passage and the outer housing.
    The discharge duct has an upper portion 10 and a lower portion 6, the surface of the upper portion 10 defining the flow passage 2, the lower portion 6 defining the flow passage 2. Refractory nozzles, characterized in that the lower part (6) is fixed inside or on the surface of the upper part (10).
    [2" claim-type="Currently amended] A refractory nozzle for disposing in or on a wall of a metallurgical crucible having a flow passage and a discharge duct surrounding the flow passage, the discharge duct having a surface defining the flow passage and the outer housing.
    The discharge duct has an upper portion 10 and a lower portion 6, the lower portion 6 being fixed inside or on the upper portion 10, the diameter of the flow passage 2 being the lower portion. Refractory nozzle, characterized in that larger in the upper part (10) than in the part (6).
    [3" claim-type="Currently amended] The material according to claim 1 or 2, wherein the material partitioning the flow passage (2) and constituting the upper portion (10) is highly thermally insulating, highly pure, chemically inert to steel at temperatures of about 1400 ° C to 1650 ° C. And a high heat resistance, wherein the material of the lower part (6) which partitions the flow passage (2) is a refractory ceramic.
    [4" claim-type="Currently amended] The refractory nozzle according to claim 1 or 2, characterized in that the material of the lower part (6) partitioning the flow passage (2) is aluminum oxide or zirconium dioxide.
    [5" claim-type="Currently amended] The material according to claim 1 or 2, wherein the material of the lower part 6 which partitions the flow passage 2 comprises a hollow sphere composed of refractory oxide, expanded ceramic, fibrous material, or a dense material into which at least one of these materials is introduced. A refractory nozzle comprising one of a hollow ball, an aluminum oxide sphere, and a mixture of these.
    [6" claim-type="Currently amended] The fire nozzle according to claim 1 or 2, characterized in that the housing (4) consists of a metal, ceramic or other fire resistant material.
    [7" claim-type="Currently amended] The fire nozzle according to claim 1 or 2, characterized in that the material of the lower part (6) which defines the flow passage (2) is at least partly surrounded by a heater (7).
    [8" claim-type="Currently amended] 8. A fire resistant nozzle according to claim 7, characterized in that a highly insulating material is arranged between the housing (4) and the heater (7).
    [9" claim-type="Currently amended] 2. The fire nozzle according to claim 1, wherein the diameter of the flow passage (2) of the lower portion (6) is smaller than the diameter of the flow passage (2) of the upper portion (10).
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    同族专利:
    公开号 | 公开日
    CA2387375C|2009-07-21|
    US20030011113A1|2003-01-16|
    US20060076720A1|2006-04-13|
    CN1262407C|2006-07-05|
    BR0202673A|2003-05-06|
    EP1275452A2|2003-01-15|
    US7028868B2|2006-04-18|
    JP2003112257A|2003-04-15|
    EP1275452A3|2003-12-10|
    CN1411934A|2003-04-23|
    KR100599638B1|2006-07-12|
    CA2387375A1|2003-01-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2001-07-13|Priority to DE10133557
    2001-07-13|Priority to DE10133557.1
    2001-10-11|Priority to DE10150032.7
    2001-10-11|Priority to DE2001150032
    2002-07-11|Application filed by 헤라우스 일렉트로-나이트 인터내셔날 엔. 브이.
    2003-01-23|Publication of KR20030007126A
    2006-07-12|Application granted
    2006-07-12|Publication of KR100599638B1
    优先权:
    申请号 | 申请日 | 专利标题
    DE10133557|2001-07-13|
    DE10133557.1|2001-07-13|
    DE10150032.7|2001-10-11|
    DE2001150032|DE10150032C2|2001-07-13|2001-10-11|Fireproof spout|
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