Processes for the production of a controlled atmosphere for heat
treatment of metals
    1.
    发明授权
    Processes for the production of a controlled atmosphere for heat treatment of metals 失效
    用于生产用于金属热处理的控制大气的方法

    公开(公告)号:US5207839A

    公开(公告)日:1993-05-04

    申请号:US777676

    申请日:1991-10-15

    IPC分类号: C21D1/76

    CPC分类号: C21D1/76 Y02P10/122

    摘要: Substantially all residual oxidizing gas in a treating atmosphere which is inert or reducing, is eliminated by injecting into the atmosphere a gaseous silicon hydride at a temperature between 50 and 1,600.degree. C. and in amount such that the ratio R of the content of hydride to the content of oxidizing gas to be eliminated is within the range of 1.5 to 20. The rapid action of the trace amounts of hydride injected enables one to control with precision heat treatment processes by maintaining the residual oxidizing gas contents below predetermined very low thresholds.

    摘要翻译: 惰性或还原性处理气氛中的基本上所有的残余氧化气体,通过在50〜1600℃的温度下向气氛中注入气态硅氢化物而消除,使得氢化物含量与 要排除的氧化气体的含量在1.5至20的范围内。注入的微量氢化物的快速作用使得能够通过将残余氧化气体含量保持在预定的非常低的阈值以下来进行精确的热处理过程。

    Process of the production of an atmosphere for the thermal treatment of
metals and thermal treatment apparatus
    2.
    发明授权
    Process of the production of an atmosphere for the thermal treatment of metals and thermal treatment apparatus 失效
    用于热处理金属和热处理设备的大气生产工艺

    公开(公告)号:US5242509A

    公开(公告)日:1993-09-07

    申请号:US778403

    申请日:1991-10-17

    IPC分类号: C21D1/76

    CPC分类号: C21D1/763 Y02P10/212

    摘要: The thermal treatment atmosphere is obtained by catalytic reaction of an impure mixture of nitrogen, advantageously obtained by permeation or adsorption, and hydrocarbon, the catalytic reaction being carried out at a temperature between 400.degree. and 900.degree. C., typically between 500.degree. and 800.degree. C., with a noble metal base catalyst, typically platinum or palladium on alumina support. The reaction may be carried out in a reactor placed inside or outside the furnace.

    摘要翻译: 热处理气氛是通过不利的氮气混合物(通过渗透或吸附有利地获得的)和烃的催化反应获得的,催化反应在400-900℃,通常在500℃和800℃之间的温度下进行 与贵金属碱催化剂,通常为氧化铝载体上的铂或钯。 反应可以在放置在炉内或炉外的反应器中进行。

    Process for producing a glass-metal connection
    3.
    发明授权
    Process for producing a glass-metal connection 失效
    用于生产玻璃金属连接的方法

    公开(公告)号:US5004489A

    公开(公告)日:1991-04-02

    申请号:US483177

    申请日:1990-02-22

    IPC分类号: C01B5/00 C03C27/02 C03C27/04

    CPC分类号: C01B5/00 C03C27/02 C03C27/046

    摘要: The invention concerns glass-metal sealing comprising effecting on a metallic piece, in particular an alloy based on iron and nickel or iron, nickel and cobalt, first of all a decarburization under an atmosphere, at a temperature of between 950.degree. C. and 1,150.degree. C., formed by hydrogen (10 to 99%), water vapor (1 to 8%), with a ratio hydrogen/water vapor higher than five, the possible remainder being nitrogen, then an oxidation under an atmosphere formed by an inert vector gas such as nitrogen, either at a temperature of 600.degree. C. to 800.degree. C. and with a water vapor content of 8% to 2%; or at a temperature of 900.degree. C. to 1,100.degree. C. and with a water vapor content of 4% to 0.5%; then establishing the connection. The gas mixture for a treatment atmosphere is obtained by mixing nitrogen and hydrogen conducted through pipes (13, 14), to which oxygen is added through a pipe (15) upstream of a catalytic chamber (11) permitting the elimination of the oxygen and the production of a content of water vapor.

    摘要翻译: 本发明涉及玻璃 - 金属密封,其包括在金属片上,特别是基于铁和镍或铁,镍和钴的合金,首先在气氛下脱碳,温度为950℃至1150℃ 由氢气(10至99%),水蒸气(1至8%)形成的氢气/水蒸汽高于5的氢气,可能的余量为氮气,然后在惰性气氛下氧化 载体气体如氮气,温度在600℃至800℃,水汽含量为8%至2%; 或在900〜1100℃的温度下,水汽含量为4〜0.5%。 然后建立连接。 用于处理气氛的气体混合物通过混合通过管(13,14)导入的氮气和氢气而获得,氧气通过允许消除氧气的催化室(11)上游的管(15)加入到其中, 生产水汽含量。

    Gas permeable refractory brick for use in regenerative heat exchanger and hot grid formed therefrom
    4.
    发明授权
    Gas permeable refractory brick for use in regenerative heat exchanger and hot grid formed therefrom 失效
    用于再生式热交换器和由其形成的热电网的透气耐火砖

    公开(公告)号:US06389776B1

    公开(公告)日:2002-05-21

    申请号:US09525117

    申请日:2000-03-14

    IPC分类号: F27D104

    CPC分类号: C21B9/00 F27D1/042 F28D17/005

    摘要: Provided are novel gas permeable bricks of a refractory material suitable for use in a hot grid of a regenerative heat exchanger. In accordance with one aspect of the invention, the brick has an inner face and an outer face on opposite sides of the brick. One or more cavities extend from the inner face partially into the brick. A plurality of channels for each of the cavities extend from the outer face to the cavities. The cavities and channels allow a gas to pass through the brick. Also provided is a hot grid suitable for use in a regenerative heat exchanger formed from a plurality of the bricks.

    摘要翻译: 提供适用于再生式热交换器的热格栅的耐火材料的新型透气砖。 根据本发明的一个方面,砖具有在砖的相对侧上的内表面和外表面。 一个或多个空腔从内表面部分地延伸到砖中。 用于每个空腔的多个通道从外表面延伸到空腔。 空腔和通道允许气体通过砖。 还提供了一种适合用于由多个砖形成的再生式热交换器的热格栅。

    Process and apparatus for heat treating articles while hardening in
gaseous medium
    5.
    发明授权
    Process and apparatus for heat treating articles while hardening in gaseous medium 失效
    在气体介质中硬化时的热处理制品的工艺和装置

    公开(公告)号:US5158625A

    公开(公告)日:1992-10-27

    申请号:US680423

    申请日:1991-04-04

    CPC分类号: C21D1/613 C21D1/767 C21D1/773

    摘要: Process for heat treating articles by hardening them in a recirculating gas medium which is in contact with the treated articles, the hardening gas being cooled by means of a heat exchanger, of the type in which helium is used as hardening gas, and is stored under holding pressure in a buffer container, wherein at the end of a hardening operation, a helium load is extracted from the treatment enclosure, in final phase by means of pump until a primary vacuum is obtained, the extracted helium is brought to purifying pressure by means of a compressor associated to a mechanical filter, and the helium under purifying pressure is sent to a purifier in which impurities are removed, after which it is transferred, if desired, after recompression in the buffer container.

    摘要翻译: 通过在与处理物接触的再循环气体介质中硬化它们来进行热处理的方法,硬化气体通过热交换器被冷却,其中氦气用作硬化气体,并被储存在 在缓冲容器中保持压力,其中在硬化操作结束时,通过泵在最终阶段从处理外壳中提取氦负载,直到获得初级真空,通过装置将提取的氦气提纯到压力 与机械过滤器相关联的压缩机,并且将净化压力下的氦气送至其中除去杂质的净化器,然后如果需要,在缓冲容器中再压缩后将其转移。

    Process for producing ceramic-metal multilayer components and apparatus
for carrying out the process
    6.
    发明授权
    Process for producing ceramic-metal multilayer components and apparatus for carrying out the process 失效
    生产陶瓷金属多层组件的方法和实施该工艺的设备

    公开(公告)号:US5082606A

    公开(公告)日:1992-01-21

    申请号:US483182

    申请日:1990-02-22

    摘要: The invention concerns the production of ceramic-metal multilayer components comrising effecting, after making up in the crude state, in particular by metallization and stacking of pre-cut raw ceramic bands, a simultaneous firing operation, termed cofiring, on the components under an atmosphere based on hydrogen or nitrogen or a mixture of hydrogen and nitrogen, having a regulated water vapor content at a temperature of first of all between 800.degree. C. and 1800.degree. C., and more precisely either at a moderately high temperature plateau between 800.degree. C. and 1300.degree. C. for certain ceramic materials such as codierite and metallic materials such as copper and nickel, or at a temperature plateau between about 1400.degree. C. and 1800.degree. C. for refractory materials such as tungsten, molybdenum, alumina, according to which the atmosphere having a water vapor content is obtained by addition to a vector gas at (13) and (14) of a quantity of additional oxygen (15), and a quantity of additional hydrogen at (14) sufficient to obtain by hydrogen-oxidation reaction the predetermined water vapor content, and determining these quantities of addition of oxygen and the contingent addition of hydrogen so that said water vapor content is, in the course of the cofiring, that which is the most appropriate for the different stages of said cofiring.

    摘要翻译: 本发明涉及在原油状态特别是通过金属化和预切割的原始陶瓷带的堆叠之后产生的陶瓷 - 金属多层组分的生产,在气氛下的组分上同时进行称为共烧的操作 基于氢或氮或氢和氮的混合物,在800℃至1800℃之间的温度下具有调节的水蒸汽含量,更精确地在800℃至800℃的中等高温平台 对于某些陶瓷材料如铜,镍和金属材料如铜和镍,或在约1400℃至1800℃之间的温度下,对于诸如钨,钼,氧化铝等耐火材料, 根据该气氛,通过在(13)和(14)中向量气体中加入一定量的附加氧(15)获得具有水蒸气含量的气氛,并且一定量的附加水 (14)足以通过氢氧化反应获得预定的水蒸汽含量,并确定这些氧的加入量和偶然添加氢,使得在共烧的过程中所述水蒸汽含量是 是最适合于所述共烧的不同阶段。

    Method of carburizing workpiece
    8.
    发明授权
    Method of carburizing workpiece 失效
    渗碳工件的方法

    公开(公告)号:US4519853A

    公开(公告)日:1985-05-28

    申请号:US496934

    申请日:1983-05-23

    IPC分类号: C23C8/22 C23C8/32 C23C11/10

    CPC分类号: C23C8/22

    摘要: The method of carburizing steel workpieces comprises loading workpieces to be carburized in a furnace and maintaining them in a carbon enriching atmosphere comprising carbon monoxide, hydrogen and nitrogen. The treatment comprises a first phase carried out at a temperature from 850.degree. C. to 1050.degree. C. followed by a second phase carried out at a temperature from 700.degree. C. to 950.degree. C. During the first phase an atmosphere is used having a carbon potential from about 1.1% to about 1.6% by weight and during the second phase the amount of nitrogen in the atmosphere is increased from two to thirty times so that the carbon potential for the second phase is at least about 0.5% by weight less than the carbon potential for the first phase.

    摘要翻译: 对钢工件进行渗碳的方法包括将要渗碳的工件装入炉中并将其保持在包含一氧化碳,氢气和氮气的富碳气氛中。 处理包括在850℃至1050℃的温度下进行的第一相,随后在700℃至950℃的温度下进行第二相。在第一阶段期间使用具有 碳电势为约1.1%至约1.6%重量,而在第二阶段期间,大气中氮气的量增加2至30倍,使得第二相的碳势为至少约0.5重量% 比第一阶段的碳势。

    Regenerative heat exchanger and method for heating a gas therewith
    9.
    发明授权
    Regenerative heat exchanger and method for heating a gas therewith 有权
    再生热交换器及其气体加热方法

    公开(公告)号:US06631754B1

    公开(公告)日:2003-10-14

    申请号:US09525115

    申请日:2000-03-14

    IPC分类号: F28D1700

    CPC分类号: F28D17/005

    摘要: Provided is a novel regenerative heat exchanger and a method for heating a gas in the heat exchanger. The regenerative heat exchanger features a chamber separated into a plurality of annular concentric spaces, including: a first, inner annular space defining a hot collection chamber; a second, outer annular space concentric to and around the first space defining a cold collection chamber; and a third annular space defining a heat exchange zone concentric to and between the first and second spaces. The heat exchange zone contains a particulate heat transfer material. The third space is supported on the inside by a concentrically disposed hot grid, and the external diameter of the third annular space is less than about double the internal diameter of the third annular space. The invention has particular applicability to the feeding of hot blast to a blast furnace in the iron making industry.

    摘要翻译: 提供了一种新型再生式热交换器和用于加热热交换器中的气体的方法。 再生式热交换器具有分离成多个环形同心空间的室,包括:限定热收集室的第一内部环形空间; 与限定冷收集室的第一空间同心并围绕第二空间的第二外环形空间; 以及限定与第一和第二空间同心并且在第一和第二空间之间的热交换区的第三环形空间。 热交换区包含颗粒状的传热材料。 第三空间由同心设置的热格栅支撑在内部,并且第三环形空间的外径小于第三环形空间的内径的大约两倍。 本发明特别适用于在炼铁工业中向高炉供给热风

    Treatment of liquid waste material
    10.
    发明授权
    Treatment of liquid waste material 失效
    废液处理

    公开(公告)号:US5531169A

    公开(公告)日:1996-07-02

    申请号:US256048

    申请日:1994-09-12

    摘要: Liquid waste material, particularly material containing sulfuric acid, may be combusted using an oxygen-rich material by a process in which:(i) a primary oxidant and fuel issuing from a burner are combusted in a furnace, the proportion of primary oxidant to fuel being such that there is insufficient oxygen to combust the fuel completely;(ii) introducing into the furnace the liquid waste material in atomized form around the burner;(iii) introducing into the furnace spaced from the burner a secondary oxidant which contains sufficient oxygen to combust completely the fuel not combusted by the primary oxidant the direction in which each of the primary oxidant, fuel and liquid waste material is introduced being such that the substances flow in substantially the same direction, the rate at which the primary oxidant, fuel, liquid waste material and secondary oxidant are introduced being such that a plug flow of substances through the furnace is created.

    摘要翻译: PCT No.PCT / GB92 / 02330 Sec。 371日期1994年9月12日 102(e)1994年9月12日PCT PCT 1992年12月16日PCT公布。 公开号WO93 / 13362 日期为1993年7月8日。液体废料,特别是含有硫酸的材料可以使用富氧材料燃烧,其中:(i)主要氧化剂和从燃烧器排出的燃料在炉中燃烧, 主要氧化剂与燃料的比例使得氧气不足以完全燃烧燃料; (ii)将燃烧器周围的雾化形式的废液材料引入炉内; (iii)将与燃烧器间隔开的二次氧化剂引入到炉中,该辅助氧化剂含有足够的氧以完全燃烧未被主氧化剂燃烧的燃料,其中引入了主氧化剂,燃料和废液中的每一种的方向使得 物质以基本相同的方向流动,引入初级氧化剂,燃料,废液和二次氧化剂的速率使得产生通过炉的物质的活塞流。