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164 条记录 (耗时 0.027 秒)

    Melting metal particles and dispersing gas with vaned impeller
    103.
    发明授权
    Melting metal particles and dispersing gas with vaned impeller 失效
    熔融金属颗粒和分散气体与叶轮

    公开(公告)号：US5143357A

    公开(公告)日：1992-09-01

    申请号：US614914

    申请日：1990-11-19

    申请人： Ronald E. Gilbert ,  George S. Mordue

    发明人： Ronald E. Gilbert ,  George S. Mordue

    IPC分类号： C22B7/00 ,  C21C7/00 ,  C21C7/072 ,  C22B9/16 ,  C22B21/00 ,  F27D27/00

    CPC分类号： C22B21/0084 ,  C21C7/00 ,  C21C7/072

    摘要： Metal particles are melted by mixing them with molten metal contained in a bath. A shaft-supported, rotatable impeller is immersed into the molten metal and rotated so as to establish a vortex-like flow of molten metal. Metal particles are deposited onto the surface of the molten metal in the vicinity of the rotating impeller. The particles are submerged substantially immediately after being deposited onto the surface of the molten metal. The impeller includes a thin rectangular prism having sharp-edged corners and vanes that extend upwardly from the prism. The impeller also can be used to disperse gas into the molten metal by pumping the gas through a bore extending the length of the shaft and out of the impeller along the lower surface of the impeller. The gas is sheared into finely divided bubbles as it rises along the sides of the impeller.

    摘要翻译： 通过将金属颗粒与包含在浴中的熔融金属混合来熔化金属颗粒。 轴支撑的可旋转的叶轮浸入熔融金属中并旋转，以形成涡流状的熔融金属。 金属颗粒沉积在旋转叶轮附近的熔融金属表面上。 颗粒在沉积在熔融金属表面上之后基本上立即被浸没。 叶轮包括具有从棱镜向上延伸的锋利边角和叶片的薄矩形棱镜。 叶轮也可用于通过沿着叶轮的下表面的轴延伸并从叶轮的外部延伸的气体泵送气体来将气体分散到熔融金属中。 当气体沿着叶轮的侧面上升时，气体被剪切成细小的气泡。

    Apparatus for the continuous production of high ultra-fine, aluminum nitride powder by the carbo-nitridization of alumina
    104.
    发明授权
    Apparatus for the continuous production of high ultra-fine, aluminum nitride powder by the carbo-nitridization of alumina 失效
    用于通过氧化铝碳氮化连续生产高超细，氮化铝粉末的装置

    公开(公告)号：US5108713A

    公开(公告)日：1992-04-28

    申请号：US483475

    申请日：1990-02-21

    申请人： Jonathan J. Kim ,  Viswanathan Venkateswaran ,  Randolph Kujawa

    发明人： Jonathan J. Kim ,  Viswanathan Venkateswaran ,  Randolph Kujawa

    IPC分类号： B01J8/18 ,  C01B21/072 ,  F27B15/00 ,  F27B15/14

    CPC分类号： B01J8/1836 ,  C01B21/0726 ,  F27B15/00 ,  F27B15/14 ,  B01J2208/00495 ,  Y10S423/16

    摘要： A process and apparatus for the manufacture of high purity, ultra-fine aluminum nitride powder by the carbo-nitridization of alumina. In the method, agglomerates uniform in both size, chemical composition and porosity are formed containing a stoichiometric mixture of alumina and carbon, and a small amount of catalyst, and furnaced in a controlled manner in a well-mixed two chamber reaction vessel having optional top or bottom fluidizing gas feed to achieve a uniform and consistent level of conversion. Milling of the as-reacted agglomerates under a controlled atmosphere will produce high purity, micron sized aluminum nitride powder. The reactor is an automatically controlled fluid bed reactor for treatment of refractory materials with a hot fluidizing gas having a two chamber design in which the lower furnace chamber and reactor bed are removable from the bottom of the reactor. With unique reactor, unusually high reaction temperatures of up to 2000.degree. C. are obtainable. Further, the bottom removal feature allows for easy servicing of the reactor. Still further, the fluidizing gas may be introduced via a conduit and a bubble cap from above or below the reactor. If from below, wear on the conduit will be reduced because in such a configuration the conduit will not extend through the bed of the reactor. If the gas is introduced from above, the gas will be preheated by means of countercurrent heat flow, enabling more efficient operation of the reactor.

    摘要翻译： 一种用于通过氧化铝碳氮化制造高纯度超细氮化铝粉末的方法和装置。 在该方法中，形成包含氧化铝和碳的化学计量混合物和少量催化剂的尺寸，化学组成和孔隙度均匀的附聚物，并且以可控的方式在具有可选顶部的良好混合的两室反应容器中加热 或底部流化气体进料以实现均匀且一致的转化水平。 在受控气氛下对已反应的附聚物进行研磨将产生高纯度，微米级的氮化铝粉末。 反应器是一种自动控制的流化床反应器，用于使用具有两室设计的热流化气体处理耐火材料，其中下炉室和反应器床可从反应器的底部移除。 使用独特的反应器，可获得高达2000℃的异常高的反应温度。 此外，底部去除特征允许容易地维护反应器。 此外，流化气体可以经由反应器上方或下方的导管和气泡盖引入。 如果从下方，导管上的磨损将会减小，因为在这种构造中导管不会延伸通过反应器的床。 如果从上方引入气体，则气体将通过逆流热流预热，从而能够更有效地操作反应器。

    Apparatus for injecting gas into molten metal
    106.
    发明授权
    Apparatus for injecting gas into molten metal 失效
    将气体注入熔融金属的装置

    公开(公告)号：US4973433A

    公开(公告)日：1990-11-27

    申请号：US387168

    申请日：1989-07-28

    申请人： Ronald E. Gilbert ,  Harvey Martin ,  George S. Mordue

    发明人： Ronald E. Gilbert ,  Harvey Martin ,  George S. Mordue

    IPC分类号： B01F3/04

    CPC分类号： B01F3/04262 ,  B01F2003/0439 ,  B01F2215/0044

    摘要： Apparatus for injecting gas into molten metal includes a porous ceramic body having a first surface through which gas can be introduced into the body, and a second surface through which gas can flow from the body. A refractory member is attached to the body and surrounds at least the first surface, while leaving the second surface exposed. The refractory member is impervious to gas, while having a coefficient of thermal expansion approximating that of the body. Preferably, a refractory sealant securely attaches the refractory member to the body. By use of the present invention, the refractory member and the body remain tightly connected to each other at all times. Accordingly, gas leaks are prevented and all gas flowing into the body is discharged through the second surface, as desired.

    摘要翻译： 将气体注入熔融金属的装置包括具有第一表面的多孔陶瓷体，气体可以通过该第一表面被引入到主体中，以及第二表面，气体可以通过该第二表面从主体流出。 耐火构件附接到主体并且至少围绕第一表面，同时使第二表面暴露。 耐火构件不透气，同时热膨胀系数接近于身体的热膨胀系数。 优选地，耐火密封剂将耐火构件牢固地附接到主体。 通过使用本发明，耐火构件和主体始终保持彼此紧密连接。 因此，防止气体泄漏，并且根据需要，流入体内的所有气体通过第二表面排出。

    Method for increasing boron.sup.10 contents of neutron absorbing articles
    107.
    发明授权
    Method for increasing boron.sup.10 contents of neutron absorbing articles 失效
    增加中子吸收制品硼含量的方法

    公开(公告)号：US4293598A

    公开(公告)日：1981-10-06

    申请号：US960150

    申请日：1978-11-13

    申请人： Michael T. Hortman ,  Robert G. Naum

    发明人： Michael T. Hortman ,  Robert G. Naum

    IPC分类号： C08K3/38 ,  G21C19/40 ,  G21F1/10

    CPC分类号： G21F1/103 ,  C08K3/38 ,  Y10S376/905 ,  Y10T428/31942

    摘要： A method for increasing the boron.sup.10 content of a neutron absorbing article, such as one in flat, flexible sheet shape, includes coating a surface of such article with a solidifiable liquid synthetic organic polymeric material, such as a phenol formaldehyde type resin, applying boron carbide particles to the polymeric material and solidifying the polymer, such as by curing to cross-linked permanently set form, so as to hold the neutron absorbing boron carbide particles in place thereon. In highly preferred embodiments of the invention the boron carbide particles applied will extend beyond the surface of the external material and will serve as anchoring means for applications of subsequent coatings and the plurality of coatings, usually after initial partial curing to solidify them and make them form-retaining, will be permanently cross-linked simultaneously. In another aspect of the invention the plurality of flat neutron absorbing articles may be joined together by contacting surfaces thereof with such a coating material, preferably containing boron carbide particles, and curing it.

    摘要翻译： 用于提高中子吸收制品（例如平板，柔性片状）中的硼10含量的方法包括用可凝固的液体合成有机聚合物材料如酚醛树脂涂覆这种制品的表面，施加碳化硼 颗粒到聚合物材料并固化聚合物，例如通过固化成交联的永久固化形式，以便将中子吸收碳化硼颗粒保持在其上。 在本发明的非常优选的实施方案中，施加的碳化硼颗粒将延伸超出外部材料的表面，并且将用作后续涂层和多个涂层的应用的锚固装置，通常在初始部分固化之后，使它们形成 将会同时永久地交互。 在本发明的另一方面，多个平的中子吸收制品可以通过使其表面与这样的涂层材料接合，优选地包含碳化硼颗粒并固化。

    Shrink-resistant refractory fiber and process for making same
    108.
    发明授权
    Shrink-resistant refractory fiber and process for making same 失效
    耐热耐热纤维及其制造方法

    公开(公告)号：US4240833A

    公开(公告)日：1980-12-23

    申请号：US102606

    申请日：1979-12-12

    申请人： Thomas A. Myles

    发明人： Thomas A. Myles

    IPC分类号： C03C13/00 ,  C04B35/622 ,  C03C3/22 ,  C04B35/14 ,  C04B35/44

    CPC分类号： C03C13/006 ,  C04B35/62245

    摘要： A shrink resistant flexible ceramic fiber and its process of manufacture which comprises melting from about 40 to 65 weight percent of alumina with from about 35 to about 60 weight percent of silica, forming fibers from the melt, rapidly solidifying the fibers, heating the fibers to a sufficient temperature for a sufficient time to form microcrystals and cooling the fibers to below the crystallization temperature before macrocrystals can form.

    摘要翻译： 一种抗收缩的柔性陶瓷纤维及其制造方法，其包括用约35至约60重量％的二氧化硅熔化约40至65重量％的氧化铝，从熔体中形成纤维，快速固化纤维，将纤维加热至 在形成微晶体之前足够的温度足以形成微晶并将纤维冷却至低于结晶温度。

    Method of producing a high density silicon carbide product
    109.
    发明授权
    Method of producing a high density silicon carbide product 失效
    生产高密度碳化硅产品的方法

    公开(公告)号：US4237085A

    公开(公告)日：1980-12-02

    申请号：US21403

    申请日：1979-03-19

    申请人： Richard H. Smoak

    发明人： Richard H. Smoak

    IPC分类号： C04B35/565 ,  C04B35/64 ,  C04B35/56

    CPC分类号： C04B35/64 ,  C04B35/565

    摘要： A method of pressureless sintering silicon carbide mixtures to obtain a sintered, dense product when the silicon carbide starting materials do not include a densification aid, such as boron, beryllium or aluminum, is described. The starting materials are mixtures containing predominantly particulate silicon carbide and include usually less than about 10 and, preferably, less than about 6 percent by weight of carbon in the form of elemental carbon or in the form of a carbon source material. The mixtures may also contain minor amounts of other additives, such as lubricants, surfactants or agglutinants, to aid in forming a compact, or green body, from the mixtures, or minor amounts of other ceramic materials depending upon the nature of the desired final product. The mixtures are formed into compacts, or green bodies, by known techniques. The powder compact is sintered under substantially pressureless conditions in a sintering atmosphere containing boron to produce a sintered product having a density of at least 85 percent and, preferably, greater than about 90 percent of the theoretical density of silicon carbide.

    摘要翻译： 描述了当碳化硅起始材料不包括致密化助剂如硼，铍或铝时，无压烧结碳化硅混合物以获得烧结致密产品的方法。 起始材料是主要包含颗粒状碳化硅的混合物，通常含有少于约10重量％，优选小于约6重量％的以元素碳形式或以碳源材料形式的碳。 混合物还可以含有少量的其它添加剂，例如润滑剂，表面活性剂或凝集剂，以帮助从混合物或少量其它陶瓷材料形成紧密或生坯，这取决于所需最终产品的性质 。 通过已知技术将混合物形成压实体或生坯体。 粉末压块在基本无压力的条件下在含硼的烧结气氛中烧结，以产生密度为碳化硅理论密度的至少85％，优选大于约90％的烧结产品。

    Gas ignition control
    110.
    发明授权
    Gas ignition control 失效
    燃气点火控制

    公开(公告)号：US4235586A

    公开(公告)日：1980-11-25

    申请号：US917235

    申请日：1978-06-20

    申请人： James A. Hirsch

    发明人： James A. Hirsch

    IPC分类号： F23N5/14 ,  F23N5/20 ,  F23Q7/10 ,  F23N5/00

    CPC分类号： F23Q7/10 ,  F23N5/146 ,  F23N5/20 ,  F23N2025/16 ,  F23N2027/38 ,  F23N2029/00

    摘要： An apparatus for fuel ignition comprising an electrical source for providing electrical current; an electrically operated fuel ignition means; a valve means which allows passage of fuel to the ignition means when the valve means is opened; a first valve control means which will open the valve upon application of an electrical current and a second valve control means which will retain the valve means in an open position but will not initially open the valve upon application of an electrical current; an activating switch electrically connected between the electrical source and the rest of the apparatus so that the apparatus will not operate unless the activating switch is closed; a time delay switch connected between the activating switch and the rest of the apparatus and connected to an ignition sensing switch means so that the time delay switch stops the flow of electrical current to the rest of the apparatus if the ignition sensing switch means does not sense ignition within the time delay; and an ignition sensor for sensing ignition and an ignition sensing switch means responsive thereto. The ignition sensing switch means, when the activating switch is closed, switches electrical current from the first valve control means to the second valve control means after ignition is sensed, shunts out the time delay relay after ignition is sensed and disconnects the ignition means after ignition is sensed. If the ignition sensor ceases to sense that ignition is taking place, the ignition sensing switch again connects the first valve control means, the time delay relay and the ignition means.

    摘要翻译： 一种燃料点火装置，包括用于提供电流的电源; 电动燃料点火装置; 阀装置，当阀装置打开时允许燃料通过点火装置; 第一阀控制装置，其在施加电流时打开阀;以及第二阀控制装置，其将阀装置保持在打开位置，但是在施加电流时不会初始打开阀; 电连接在电源和设备的其余部分之间的激活开关，使得除非启动开关闭合，否则该装置将不工作; 连接在激活开关和装置的其余部分之间并连接到点火感测开关装置的时间延迟开关，使得如果点火感测开关装置没有感觉到时间延迟开关停止到设备的其余部分的电流的流动 点火时间延迟; 以及用于感测点火的点火传感器和响应于此的点火感测开关装置。 点火检测开关装置，当启动开关闭合时，在感测到点火之后将电流从第一阀控制装置切换到第二阀控制装置，在点火之后分流出延时继电器并在点火之后断开点火装置 被感测。 如果点火传感器不再感到点火正在发生，则点火传感开关再次连接第一阀控制装置，延时继电器和点火装置。