Method and system for control of the electroslag remelting

C - Chemistry – Metallurgy – 22 – B

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307/16, 53/72

C22B 9/18 (2006.01) H05B 3/00 (2006.01) H05B 3/60 (2006.01)

Patent

CA 1198288

ABSTRACT OF THE DISCLOSURE: A method of controlling an electroslag remelting operation in which an electrode is lowered into a slag layer atop a metal to be mounted in an electroslag mounting furnace and an electric current is passed between said electrode and the furnace to melt the metal therein, said method comprising the steps of: detecting electromagnetic signals generated by arcing at said electrode when said electrode is above a predetermined upper limit or below a predetermined lower limit on the slag layer such that between said limits the electroslag remelting proceeds in a no-arc mode and with said electrode above and below said limits arcing the said electrode; producing a control signal upon said electro- magnetic signals attaining a predetermined limiting value; and actuating a drive controller for the rate of lowering of said electrode into said furnace in response to said control signal to maintain said electrode substantially between said limits. And an apparatus to carry out the method.

416012

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