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    • 32. 发明公开
    • System for the control and regulation of electrodes in the electro-slag remelting process
    • Kontroll- und ReguliersystemfürElektroden在einem Elektroschlacke-Umschmelzverfahren。
    • EP0011054A1
    • 1980-05-14
    • EP79830030.7
    • 1979-09-20
    • CENTRO SVILUPPO MATERIALI S.p.A.
    • Masucci, PasqualeSommovigo, Paolo
    • H05B3/60C22B4/08
    • C22B9/18H05B3/0023H05B3/60
    • The system for the control and regulation of electrodes immersion depth in an ESR process according to the present invention, is suitable for the case in which two electrodes (4, 5) are connected in series to a power source (3) and each of the electrodes has an independent feed mechanism.
      The present invention is based on the assumption that the slag used in the ESR process has a composition which does not vary during the process, thus also enabling to assume that two equal lengths of slag have equal electrical resistance. Hence the slag comprised between the electrodes tips and the molten metal bath can be considered as two variable resistances which are equal only when the electrodes tips are at the same distance from the molten metal bath.
      Thus said two variable resistances can be used in a sort of electrical bridge, which can be suitably balanced. Should an electrode be consumed more rapidly than the other, the thickness of the slag, as well as its electrical resistance, existing between the electrode tip and the molten metal will increase, thus unbalancing the bridge. The amplitude and direction of this unbalancement will tell both which electrode is consumed more rapidly and to which rate, thus enabling the operator, or an automatic device, to correct the feed rate of the electrode.
    • 根据本发明的用于控制和调节电极浸入深度的系统适用于两个电极(4,5)与电源(3)串联连接的情况,并且每个 电极具有独立的进料机构。 本发明基于以下假设:ESR方法中使用的炉渣具有在该过程中不变化的组成,因此也能够假定两个相等长度的炉渣具有相等的电阻。 因此,包括在电极尖端和熔融金属浴之间的炉渣可以被认为是两个可变电阻,只有当电极尖端与熔融金属浴相同的距离时才相等。 因此,所述两个可变电阻可以用于可以适当平衡的一种电桥。 如果电极比其他电极消耗得更快,则电极尖端和熔融金属之间存在的炉渣厚度以及其电阻将增加,从而使电桥不平衡。 这种不平衡的振幅和方向将告诉哪个电极被更快地消耗,并且使得操作者或自动装置能够校正电极的进给速率。