Linings for aluminum reduction cells
    2.
    发明授权
    Linings for aluminum reduction cells 失效
    用于减少铝的电池的衬里

    公开(公告)号:US5062929A

    公开(公告)日:1991-11-05

    申请号:US393966

    申请日:1989-08-11

    CPC classification number: C25C3/085 Y02P10/138

    Abstract: The amount of electrically conductive material in the bottom floor lining of a conventional aluminum reduction cell is reduced by using a non-conductive lining material in its place. The non-conductive material separates the remaining electrically conductive regions from the sidewall linings of the cell and preferably confines the electrically conductive material to the "anode shadow" region of the cell floor. The non-conductive material preferably comprises a particulate alumina mixture made up of large shapes which firmly compact together and smaller particles which fill the remaining voids. Optionally, the mixture may be bonded together with amorphous alumina, in which case the mixture can also be used for cell wall linings. The linings can be used in reduction cells of conventional design and reduces undesirable magnetohydrodynamic effects as well as pollution hazards caused by conventional carbonaceous cell linings.

    Methods and apparatus for non-destructive testing of materials using
longitudinal compression waves
    4.
    发明授权
    Methods and apparatus for non-destructive testing of materials using longitudinal compression waves 失效
    使用纵向压缩波对材料进行无损检测的方法和装置

    公开(公告)号:US5040419A

    公开(公告)日:1991-08-20

    申请号:US467654

    申请日:1990-01-19

    CPC classification number: G01N29/07 G01N29/30

    Abstract: The non-destructive testing of materials, particularly coarse grain materials such as the carbonaceous materials used in the anodes and cathodes of an aluminium smelting furnace, using longitudinal compression waves employs a waveguide to apply the waves to a specimen, the and specimen having a cross-sectional dimension Dg of between 3 and 5 times the material average grain size Dg. Alternatively, or in addition, the waves used preferably are of effective wavelength from about 30Ds to 50Ds. Alternatively, or in addition, the effective wavelength of the waves is preferred to be approximately equal to the length of the sample; the necessary very long samples may be obtained by connecting a plurality of smaller elementary samples end-to-end. The apparatus may include a controllable furnace for cycling the sample to determine the change with temperature of the physical characteristic that is being measured. The methods and apparatus employ relatively low frequencies, in the sonic range, and high powers; although particularly suited for measurements with coarse grain materials they are also very effective with more usual fine grain materials, such as ceramics.

    Abstract translation: 使用纵向压缩波,材料,特别是粗粒材料,例如铝熔炼炉的阳极和阴极中使用的碳质材料的无损检测使用波导将波施加到试样上,并且试样具有交叉 尺寸Dg为材料平均粒径Dg的3〜5倍。 或者或另外,优选使用的波具有约30D至50D的有效波长。 或者或另外,波的有效波长优选近似等于样品的长度; 可以通过端到端连接多个较小的基本样本来获得必要的非常长的样本。 该装置可以包括用于循环样品以确定正被测量的物理特性随温度变化的可控炉。 方法和装置在声波范围和高功率下采用相对较低的频率; 虽然特别适用于粗粒材料的测量,但它们对于更常见的细晶粒材料如陶瓷也是非常有效的。

    Linings for aluminum reduction cells
    5.
    发明授权
    Linings for aluminum reduction cells 失效
    铝还原电池衬片

    公开(公告)号:US4877507A

    公开(公告)日:1989-10-31

    申请号:US218834

    申请日:1988-07-13

    CPC classification number: C25C3/085 Y02P10/138

    Abstract: The amount of electrically conductive material in the bottom floor lining of a conventional aluminum reduction cell is reduced by using a non-conductive lining material in its place. The non-conductive material separates the remaining electrically conductive regions form the sidewall linings of the cell and preferably confines the electrically conductive material to the "anode shadow" region of the cell floor. The non-conductive material preferably comprises a particulate alumina mixture made up of large shapes which firmly compact together and smaller particles which fill the remaining voids. Optionally, the mixture may be bonded together with amorphous alumina, in which case the mixture can also be used for cell wall linings. The linings can be used in reduction cells of conventional design and reduces undesirable magnetohydrodynamic effects as well as pollution hazards caused by conventional carbonaceous cell linings.

    Composite ceramic device for measuring the temperature of liquids
    6.
    发明申请
    Composite ceramic device for measuring the temperature of liquids 有权
    用于测量液体温度的复合陶瓷装置

    公开(公告)号:US20070160427A1

    公开(公告)日:2007-07-12

    申请号:US10557355

    申请日:2004-05-12

    Abstract: A thermocouple shield assembly comprising a first tube having an upper portion and a lower portion with a lower end, the first tube including a first elongated cavity closed at the lower end and receiving the thermocouple, a second tube having a second elongated cavity with at least one open end and receiving the upper portion while a part of the lower portion containing the thermocouple extends out of the open end, and a gap between adjacent walls of the second elongated cavity and of the first tube such as to allow independent thermal deformations of the first and second tubes. In use, at least a portion of the part of the lower portion of the first tube is subjected to a given temperature while the second tube is subjected to a different temperature. Methods of manufacturing and of assembling such a thermocouple shield assembly are also presented.

    Abstract translation: 一种热电偶屏蔽组件,包括具有上部的第一管和具有下端的下部的第一管,所述第一管包括在下端封闭并接收所述热电偶的第一细长腔,具有至少具有第二细长空腔的第二管 一个开口端并且接收上部,而包含热电偶的下部的一部分延伸到开口端之外,并且第二细长腔和第一管的相邻壁之间的间隙允许独立的热变形 第一和第二管。 在使用中,第一管的下部的一部分的至少一部分经受给定温度,而第二管受到不同的温度。 还提出了制造和组装这种热电偶屏蔽组件的方法。

    System and method for the elastic properties measurement of materials
    7.
    发明申请
    System and method for the elastic properties measurement of materials 审中-公开
    材料弹性特性测量的系统和方法

    公开(公告)号:US20070157698A1

    公开(公告)日:2007-07-12

    申请号:US10568238

    申请日:2004-08-11

    Abstract: For heterogeneous materials such as refractories and carbon electrodes, the measurement the elastic properties of the material is difficult to achieve with high level of repeatability. The present invention is directed to a method and system for the elastic properties measurement of a material including the Elastic and Shear Modulus, as well as the Poisson's ratio of heterogeneous materials, at room and high temperature, according to a non destructive acoustic technique. The system comprises impacting devices for impacting a sample of the material so as to produce acoustic vibrations in the sample; acoustic detection devices so positioned relatively to the sample and the impacting device to capture the acoustic vibrations and to produce signals indicative of the acoustic vibrations; and a controller coupled to both the impacting devices and the acoustic detection device for controlling the impacting device, for receiving the signals from the acoustic detection devices and for using the signals to determine an elastic property of the material.

    Abstract translation: 对于异质材料如耐火材料和碳电极,测量材料的弹性性质难以达到高重复性。 本发明涉及一种用于根据非破坏性声学技术在包括弹性和剪切模量的材料的弹性特性测量以及室温和高温下异相材料的泊松比的方法和系统。 该系统包括用于冲击材料样品的冲击装置,以便在样品中产生声振动; 声学检测装置相对于样品和撞击装置定位以捕获声振动并产生指示声振动的信号; 以及耦合到冲击装置和用于控制冲击装置的声学检测装置的控制器,用于接收来自声学检测装置的信号,并且使用该信号来确定材料的弹性。

    Barrier layer against fluoride diffusion in linings of aluminum
reduction cells
    8.
    发明授权
    Barrier layer against fluoride diffusion in linings of aluminum reduction cells 失效
    阻挡层防止铝还原电池衬里的氟化物扩散

    公开(公告)号:US5314599A

    公开(公告)日:1994-05-24

    申请号:US921294

    申请日:1992-07-28

    Applicant: Claude Allaire

    Inventor: Claude Allaire

    CPC classification number: C25C3/085 Y02P10/138 Y02P10/262

    Abstract: A barrier layer for prevention of solid fluorides penetration, e.g. NaF, from the interior of an aluminum production cell holding a fluoride-containing melt into a refractory layer intended to provide heat and electrical insulation for the cell. The barrier layer contains CaO, which may be derived from a CaO precursor such as calcite (CaCO.sub.2) by decomposition during cell start-up. Since CaO does not appear to react with sodium fluoride (NaF), and indeed according to thermodynamic calculations seems incapable of doing so at cell operating temperatures, it is effective for preventing the penetration of that compound when the latter is in the solid state. The barrier layer makes it possible to use insulating low cost refractories which are attacked by solid fluorides in the cell wall lining with improvement of the life of such materials. The barrier layer also keeps fluorides out of the refractory materials so that these materials can be disposed of in conventional land-fill sites without risk of causing pollution due to leaching of fluoride salts.

    Abstract translation: 用于防止固体氟化物渗透的阻挡层,例如, NaF,从含有含氟化物的熔体的铝生产单元的内部进入用于为电池提供热和电绝缘的耐火层。 阻挡层含有CaO,其可以通过细胞启动期间的分解从CaO前体如方解石(CaCO 2)衍生。 由于CaO不与氟化钠(NaF)发生反应,实际上根据热力学计算,在电池工作温度下似乎不能这样做,因此当化合物处于固体状态时,防止该化合物的渗透是有效的。 阻隔层使得可以使用在细胞壁衬里中被固体氟化物侵蚀的绝缘低成本耐火材料,同时改善这种材料的寿命。 阻挡层还将氟化物从耐火材料中保持,使得这些材料可以在传统的填埋位置处理,而不会由于氟化物盐的浸出而引起污染。

    COMPOSITE CERAMIC DEVICE FOR MEASURING THE TEMPERATURE OF LIQUIDS
    9.
    发明申请
    COMPOSITE CERAMIC DEVICE FOR MEASURING THE TEMPERATURE OF LIQUIDS 审中-公开
    用于测量液体温度的复合陶瓷装置

    公开(公告)号:US20110185563A1

    公开(公告)日:2011-08-04

    申请号:US13021775

    申请日:2011-02-06

    Abstract: A method of manufacturing a shield assembly for protecting a thermocouple including assembling a first mold including a tubular shield having a cavity for receiving the thermocouple, assembling a second mold having a second tubular shield having a second elongated cavity with an open end, filling the first and second mold cavities with a liquid mix of refractory ceramic material and letting the liquid mix dry and thereafter disassembling the first and second molds to free the first and second tubular shields and curing the refractory ceramic material.

    Abstract translation: 一种制造用于保护热电偶的屏蔽组件的方法,包括组装包括具有用于接收热电偶的空腔的管状屏蔽件的第一模具,组装具有第二管状屏蔽件的第二模具,第二模具具有开口端的第二细长空腔, 以及第二模腔,其具有难熔陶瓷材料的液体混合物,并使液体混合物干燥,然后拆卸第一和第二模具以释放第一和第二管状护罩并固化耐火陶瓷材料。

    Composite ceramic device for measuring the temperature of liquids
    10.
    发明授权
    Composite ceramic device for measuring the temperature of liquids 有权
    用于测量液体温度的复合陶瓷装置

    公开(公告)号:US07882620B2

    公开(公告)日:2011-02-08

    申请号:US10557355

    申请日:2004-05-12

    Abstract: A thermocouple shield assembly comprising a first tube having an upper portion and a lower portion with a lower end, the first tube including a first elongated cavity closed at the lower end and receiving the thermocouple, a second tube having a second elongated cavity with at least one open end and receiving the upper portion while a part of the lower portion containing the thermocouple extends out of the open end, and a gap between adjacent walls of the second elongated cavity and of the first tube such as to allow independent thermal deformations of the first and second tubes. In use, at least a portion of the part of the lower portion of the first tube is subjected to a given temperature while the second tube is subjected to a different temperature. Methods of manufacturing and of assembling such a thermocouple shield assembly are also presented.

    Abstract translation: 一种热电偶屏蔽组件,包括具有上部的第一管和具有下端的下部的第一管,所述第一管包括在下端封闭并接收所述热电偶的第一细长腔,具有至少具有第二细长空腔的第二管 一个开口端并且接收上部,而包含热电偶的下部的一部分延伸到开口端之外,并且第二细长腔和第一管的相邻壁之间的间隙允许独立的热变形 第一和第二管。 在使用中,第一管的下部的一部分的至少一部分经受给定温度,而第二管受到不同的温度。 还提出了制造和组装这种热电偶屏蔽组件的方法。

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