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    Method of induction-refining a ferrous melt using a sponge iron charge
    1.
    发明授权
    Method of induction-refining a ferrous melt using a sponge iron charge 失效
    使用海绵铁电荷诱导精炼熔体的方法

    公开(公告)号：US3827877A

    公开(公告)日：1974-08-06

    申请号：US29443672

    申请日：1972-10-02

    Applicant: HUETTENWERK OBERHAUSEN AG

    Inventor： PANTKE H ,  POHL U

    IPC: C21C5/52 ,  H05B6/22 ,  H05B5/12

    CPC classification number: H05B6/22 ,  C21C5/5241 ,  Y02P10/253

    Abstract: THE CRUCIBLE OF AN INDUCTION FURNACE IS SURROUNDED BY AN UPRIGHT COIL THAT IS ENERGIZED BY ALTERNATING-CURRENT ELECTRIC POWER. THE POWER INPUT TO THE COIL IS OF SUCH A LEVEL THAT A RAISED, SLAG-FREE CROWN IS FORMED ON THE TOP OF THE MELT AND AT LEAST 55% OF THE SLAG PRODUCED IS RETAINED TO FORM AN ANNULUS AROUND THIS CROWN. THE CENTRALLY ASCENDING AND PERIPHERALLY DESCENDING CURRENTS IN THE FURROUS MELT CAUSE THE CROWN TO FORM AND ALSO INDUCE THE ANNULUS TO INTROVERT (CIRCULATE INWARDLY AND DOWNWARDLY) SO THAT LIGHT SPONGE IRON ADDED TO THE MELT IS DRAWN DOWNWARDLY INTO THE SLAG-STEEL INTERFACE AND QUICKLY HEATED AND BROUGHT INTO INTIMATE CONTACT WITH BOTH FLOATING SLAG AND THE FERROUS MELT. THE POWER IS FED TO THE COIL IN A MAGNITUDE DETERMINED BY THE RELATIONSHIP P>K(F**(1/2)) WHEREIN P IS THE POWER INPUT IN KILOWATTS PER TON OF THE MEL,T, K IS THE ANNULUS-FORMING CONSTANT AND IS GREATER THAN 45 AND PREFERABLY MORE THAN 49.5, AND F IS THE FREQUENCY IN HZ. OF THE ALTERNATING CURRENT.

    Fabrication of steel structures by welding
    2.
    发明授权
    Fabrication of steel structures by welding 失效
    通过焊接制造钢结构

    公开(公告)号：US3674577A

    公开(公告)日：1972-07-04

    申请号：US3674577D

    申请日：1969-09-18

    Applicant: HUETTENWERK OBERHAUSEN AG

    Inventor： DEGENKOLBE JOACHIM ,  MUSGEN BRUNO

    IPC: C22C38/08 ,  C21D1/00 ,  B23P11/00

    CPC classification number: C22C38/08 ,  Y10T428/12965

    Abstract: A WELDED STEEL STRUCTURE, ESPECIALLY FOR LOW TEMPERATURE OR CRYOGENIC INSTALLATION CONSISTING OF WATER-QUENCHED OR OIL-QUENCHED (TEMPERED OR HARDENED) STEEL BODIES OF THE FOLLOWING COMPOSITION BY WEIGHT:

    0.06 TO 0.25% CARBON; UP TO 0.60% SILICON; 0.40 TO 1.60% MANGANESE; UP TO 3.5% NICKEL; UP TO 1.0% CHROMIUM; UP TO 0.20% YANADIUM; UP TO 0.5% MOLYBDENUM; AND BALANCE IRON.

    UPON WELDING THE BODY IS FOUND TO BE FREE FROM DUCTILITY OR TOUGHNESS MINIMUM, AS MEASURED BY THE NOTCHED-BODY IMPACT TECHNIQUE OR DROP-WEIGHT TEST AT A LOCATION FROM ABOUT 3-10 MM. FROM THE WELD SEAM.

    System for charging electric-arc furnaces
    10.
    发明授权
    System for charging electric-arc furnaces 失效
    充电电弧炉系统

    公开(公告)号：US3634592A

    公开(公告)日：1972-01-11

    申请号：US3634592D

    申请日：1970-10-16

    Applicant: HUETTENWERK OBERHAUSEN AG

    Inventor： PANTKE HEINZ-DIETER ,  POHL ULRICH

    IPC: F27D3/10 ,  C21C5/52 ,  F27D3/18

    CPC classification number: C21C5/527 ,  F27D3/18 ,  Y02P10/216

    Abstract: An electric-arc furnace for the smelting and refining of sponge iron has respective electrodes each connected to one phase of the polyphase output of a transformer. The sponge iron is fed to a distributor at a rate determined by the total electrical power consumption of all of the electrodes and is distributed into the furnace through charging doors adjacent each electrode by a compartmented distributor, the capacity of the compartments of which is adjustable in accordance with the electrical consumption of the respective electrical phase. The distributor is a circular receptacle having angularly equispaced openings, each connected via a duct with a charging door, and vanes internally subdividing the receptacle to distribute the sponge iron between the openings in a proportion determined by the angular positions of the vanes. The vanes are adjustable within limits in accordance with the consumption of electrical energy of each electrode.

    Abstract translation: 用于熔融和精制海绵铁的电弧炉各自的电极各自连接到变压器的多相输出的一相。 海绵铁以由所有电极的总电力消耗确定的速率供给到分配器，并且通过由分隔的分配器对每个电极附近的充电门分配到炉中，其隔室的容量可调节 符合相应电相的耗电量。 分配器是具有角度等间距的开口的圆形容器，每个开口均经由具有充电门的管道连接，并且内部细分插座的叶片以由叶片的角位置确定的比例在开口之间分配海绵铁。 叶片根据每个电极的电能的消耗在极限内可调节。

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