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    METHOD FOR DETERMINATION OF THE TIP POSITION OF CONSUMABLE ELECTRODES USED IN ELECTRIC SMELTING FURNACES
    4.
    发明公开
    METHOD FOR DETERMINATION OF THE TIP POSITION OF CONSUMABLE ELECTRODES USED IN ELECTRIC SMELTING FURNACES 审中-公开
    用于确定电气炉的LEAD方法中使用的可熔电极

    公开(公告)号：EP0996844A1

    公开(公告)日：2000-05-03

    申请号：EP99910884.8

    申请日：1999-03-08

    申请人： Elkem ASA

    发明人： KALGRAF, Kjell ,  MORKESDAL, Gunnar ,  TRONSTAD, Ragnar

    IPC分类号： F27B3/28

    CPC分类号： H05B7/152 ,  F27B3/085 ,  F27B3/28 ,  Y02P10/256 ,  Y02P10/259

    摘要： The present invention relates to a method for determination of the electrode tip position for consumable electrodes in electric smelting furnaces, which electrodes being submerged in the furnace charge. The voltage between two geometrically displaced points on the outside of the steel wall of the furnace pot is measured during operation of the furnace, said points being situated as close as possible to the electrode for which the electrode tip position is to be determined, and as far away as possible from the other electrodes in the furnace. The electrode current for the electrode for which the electrode tip position is to be determined, is recorded at the same time as the voltage between the two points are measured, whereafter the difference between measured voltage between the two points and measured electrode current is calculated, and where the absolute value of said difference increases when the electrode tip position increases and decreases when the absolute value of said difference decreases.

    EINRICHTUNG ZUM REGELN EINER SCHMELZELEKTRODE
    5.
    发明授权
    EINRICHTUNG ZUM REGELN EINER SCHMELZELEKTRODE 失效
    用于熔融电极的控制装置

    公开(公告)号：EP0248829B1

    公开(公告)日：1990-01-31

    申请号：EP86906785.0

    申请日：1986-11-29

    申请人： LEYBOLD AKTIENGESELLSCHAFT

    发明人： STENZEL, Otto ,  THOMAS, Friedrich-Werner

    IPC分类号： H05B7/152

    CPC分类号： H05B7/152 ,  Y02P10/256 ,  Y02P10/259

    摘要： A device for controlling the gap between a melt electrode (62) and the surface of the molten mass (61) in a vacuum arc furnace. The device is based on the fact that the short-circuits generated between the melt electrode (62) and the surface of the molten mass (61) by the droplets of molten material give an indication about the electrode gap. The average drop frequency is approximately a linear function of the length of the arc, i.e. the drop rate is in hyperbolic relationship with the length of the arc. In order to obtain in these conditions a speedy control, a drop frequency controller (84) receives a signal which corresponds to the difference betweent he reciprocal value of a drop rate signal formed by a mean value generator (80) and a drop frequency set value.

    ARC FURNACE ELECTRODE LENGTH DETERMINATION
    6.
    发明授权
    ARC FURNACE ELECTRODE LENGTH DETERMINATION 有权
    铅长度对电弧炉测定

    公开(公告)号：EP1540996B1

    公开(公告)日：2006-01-11

    申请号：EP03752649.8

    申请日：2003-09-19

    申请人： Pyromet Proprietary Products (PTY) Limited

    发明人： SIDORSKI, Eugenius, Daniel

    IPC分类号： H05B7/107

    CPC分类号： H05B7/152 ,  Y02P10/256 ,  Y02P10/259

    摘要： This invention relates to an electrode column and a method of determining the length of the electrode in it in an active furnace. The column is a Söderberg column including a mantel in which the electrode is movable in an axial direction by lower and upper slipping clamps which are movable relatively to each other by slipping cylinders. The method includes the steps of moving, with the slip clamps, the electrode in a downslip relatively to the mantel by means of the slipping cylinders and gravity and measuring the force required to move the electrode by means only of the upper slipping clamp against predetermined reaction forces acting against movement of the electrode and computing these parameters to determine the mass and so the length of the electrode relatively to the theoretical mass of the undamaged electrode at the time of movement.

    ARC FURNACE ELECTRODE LENGTH DETERMINATION
    7.
    发明公开
    ARC FURNACE ELECTRODE LENGTH DETERMINATION 有权
    铅长度对电弧炉测定

    公开(公告)号：EP1540996A1

    公开(公告)日：2005-06-15

    申请号：EP03752649.8

    申请日：2003-09-19

    申请人： Pyromet Proprietary Products (PTY) Limited

    发明人： SIDORSKI, Eugenius, Daniel

    IPC分类号： H05B7/107

    CPC分类号： H05B7/152 ,  Y02P10/256 ,  Y02P10/259

    摘要： This invention relates to an electrode column and a method of determining the length of the electrode in it in an active furnace. The column is a Söderberg column including a mantel in which the electrode is movable in an axial direction by lower and upper slipping clamps which are movable relatively to each other by slipping cylinders. The method includes the steps of moving, with the slip clamps, the electrode in a downslip relatively to the mantel by means of the slipping cylinders and gravity and measuring the force required to move the electrode by means only of the upper slipping clamp against predetermined reaction forces acting against movement of the electrode and computing these parameters to determine the mass and so the length of the electrode relatively to the theoretical mass of the undamaged electrode at the time of movement.

    METHOD FOR ESTIMATING ELECTRODE TIP POSITION
    10.
    发明公开
    METHOD FOR ESTIMATING ELECTRODE TIP POSITION 有权
    用于估计电极尖端的位置

    公开(公告)号：EP1099087A1

    公开(公告)日：2001-05-16

    申请号：EP99926992.1

    申请日：1999-06-23

    申请人： Elkem ASA

    发明人： BRUSTAD, Georg ,  MYRHAUG, Edin, Henrik ,  TVEIT, Halvard ,  VALDERHAUG, Aasgeir

    IPC分类号： F27D21/00

    CPC分类号： H05B7/152 ,  F27B3/085 ,  F27B3/28 ,  F27D21/00 ,  F27D2003/0002 ,  F27D2201/00 ,  Y02P10/256 ,  Y02P10/259

    摘要： The present invention relates to a method for estimating the electrode tip position for submerged, consumable electrodes in electric smelting furnaces. The electrode tip position for an electrode is estimated based on the position of the electrode holder and a function for consumed electrode per unit of time. According to the invention it is established an upper and a lower uncertainty range for estimated electrode tip position, which upper and lower uncertainty ranges are increased during normal operation of the furnace and where the size of the upper and lower uncertainty ranges is updated by manual sounding of the electrode and/or by weighing of the electrode and/or by vertical movement of the electrode.