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1. WO1980001809 - METHOD AND DEVICE FOR CONTROLLING THE PROCESS OF ELECTROSLAG REMELTING OF A PLURALITY OF CONSUMABLE ELECTRODES

Publication Number WO/1980/001809
Publication Date 04.09.1980
International Application No. PCT/SU1979/000105
International Filing Date 30.10.1979
IPC
C22B 9/18 2006.01
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION OR REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
9General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
16Remelting metals
18Electroslag remelting
CPC
C22B 9/18
CCHEMISTRY; METALLURGY
22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
BPRODUCTION AND REFINING OF METALS
9General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
16Remelting metals
18Electroslag remelting
Applicants
Inventors
Priority Data
272369826.02.1979SU
Publication Language Russian (RU)
Filing Language Russian (RU)
Designated States
Title
(EN) METHOD AND DEVICE FOR CONTROLLING THE PROCESS OF ELECTROSLAG REMELTING OF A PLURALITY OF CONSUMABLE ELECTRODES
(FR) PROCEDE ET DISPOSITIF DE COMMANDE DU PROCEDE DE REFUSION SOUS LAITIER ELECTROCONDUCTEUR D"UNE PLURALITE D"ELECTRODES CONSOMMABLES
Abstract
(EN)
The method consists in measuring electrode-ingot voltages, calculating their arithmetic mean value, comparing the measured voltages with their arithmetic mean value and, depending on the difference, providing a control influence according to the coefficient of influence of the gas on the speed of melting of the electrodes. The initial value of that coefficient is corrected during the remelting process. The control influence is then transmitted to actuating mechanisms changing the blowing rate of the gas fed to the under-electrode zones of those electrodes whose electrode-ingot voltages differ from their calculated arithmetic mean values. The control influence may be provided with a controlling electronic computer, its data input comprising tolerances for variations of the electrode-ingot voltages, dimensions of the consumable electrodes and the type of material of which they are made, the total volume of the slag bath; the average value of the temperature of the slag bath, the number and disposition of the consumable electrodes and of the nozzles, the maximum and minimum values of the input of the gas source and discreteness of its switching, the coefficient of the gas influence on the melting speed of the consumable electrodes. Operations similar to those described above are then carried out.
(FR)
Le procede comprend la mesure des tensions electrode-lingot, le calcul de leurs valeurs moyennes arithmetiques, la comparaison des tensions mesuree avec leurs valeurs moyennes arithmetiques et, en fonction de la difference, le procede consiste a exercer un controle au moyen du coefficient d"influence des gaz sur la vitesse de fusion des electrodes. La valeur initiale de ce coefficient est corrigee pendant le procede, de refusion. L"ordre de controle est alors transmise a des mecanismes d"actionnement qui changent le debit de soufflage des gaz envoyes sur les zones sous jacentes de ces electrodes dont les tensions electrode-lingot different de leurs valeurs moyennes arithmetiques calculees. Le controle peut-etre effectue au moyen d"un ordinateur electronique de commande dont l"entree possede des tolerances pour tenir compte des variations des tensions electrode-lingot, des dimensions des electrodes consommables et du type de materiau avec lequel elles sont fabriquees, du volume total du bain de laitier, de la valeur moyenne de la temperature du bain de laitier, du nombre et de la disposition des electrodes consommables et des ajutages, des valeurs maximum et minimum de l"entree de la source de gaz et du caractere discret de la commutation, et du coefficient de l"influence des gaz sur la vitesse de fusion des electrodes consommables. Des operations semblables a celles decrites ci-dessus sont alors effectuees.
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