SU708712A1 - Device for electroslag remelting - Google Patents

Description

The invention relates to electrometallurgy and can be used in installations for electroslag remelting of metals.

A known installation for electroslag peretava containing a mold, electrode holder, consumable and non-consumable (non-consumable) electrodes, which when re-melting are immersed in a slag bath, a device for moving non-consumable electrodes in a vertical direction relative to consumable electrodes,

In this setup, the complex drive for moving non-consumable electrodes complicates the overall design of the furnace.

A device for electroslag remelting is also known, in which non-consumable electrodes are installed — they are stationary relative to consumable electrodes in their upper part or can be attached to inventory heads of consumable electrodes.

However, in such an installation at the end of the electroslag pereplezva during the withdrawal of the shrinkage shell, the consumable and non-consumable electrodes work together. At the same time, the consumable electrode continues to melt when a non-consumable electrode is immersed in the slag bath. And since in modern metallurgy, graphite electrodes are most often used as non-consumable electrodes, carburization of the metal occurs in the upper part of the ingot.

Non-simultaneous immersion of non-consumable electrodes after fusing consumable leads to disruption of the process of electroslag heating of the upper suit of ingots.

The aim of the invention is to improve the quality of the head portion of the ingot.

To achieve this goal, in the device for electroslag smelting of ingots, which includes two main inventory heads with consumable electrodes, each of which has an auxiliary inventory head with non-consumable electrodes, the auxiliary inventory heads are equipped with retainers made in the form of rods attached to the heads at the bottom, the bottom - to the consumable electrodes, and shelves located at the same level against each other, and forming a cavity in which electrical insulation is placed fixing element.

FIG. 1 shows a device for electroslag remelting, front view; on .2 - section aa in figure 1.

The device includes two main inventory heads 1 with consumable electrodes 2 welded to them and two auxiliary inventory heads 3 with non-consumable electrodes 4 fixed on them. The main inventory heads have wedge electrode holders 5 on each side, under which the auxiliary electrodes are installed with a gap heads. Auxiliary inventory heads are supported on the sides by clamps 6, made in the form of rods, attached to the inventory heads 1 by the upper part, and welded to the consumable electrodes 2 by the lower part.

On the auxiliary inventory heads, bolts 7 are height-adjustable horizontal shelves 8. Between the shelves there is a fixed electrically insulating element 9, which is prevented from falling out of the pins 10.

The device works as follows.

When the level of the slag bath during the remelting of consumable electrodes 2 rises to the bottom of the rods 6, they are melted together with the tack and their ends are released.

And with the imbalance in current strength,

flowing through different electrodes, the consumable electrodes themselves and the rods welded thereto can be fused non-simultaneously. In this case, the accessory inventory head, which is no longer

held by the rods 6 (with the retainers of the non-consumable electrode), it will be held above the slag bath until the second pair of rods is melted by the electrically insulating element. Moving the auxiliary injection heads together with the non-consumable electrodes 3 of the slag bath will be possible only after all the rods are melted.

The inventory heads 3 descend onto the wedge electrode holders 5. This will allow the metal bath to be fed during the final period of the ESR process and exclude the possibility of changing

chemical composition of the metal.

The positive effect from the use of the invention is achieved due to the fact that from the ingots smelted using the proposed device, almost no

it is necessary to remove metal in the form of headbands.

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FIG. one

Claims (1)

(54X57) A device for electroslag remelting containing two main inventory heads with consumable electrodes, each of which has an auxiliary inventory head with non-consumable electrodes, characterized in that. in order to improve the quality of the head part of the ingot, the auxiliary heads are equipped with clamps made in the form of rods attached to the inventory heads by the upper part and to the consumable electrodes by the lower part, and shelves located at the same level against each other and forming a cavity in which the insulating fixing element.