SU453078A1 - Electroslag remelting unit - Google Patents

Abstract

1. INSTALLATION OF ELECTROSHLAKOVO GO REBELT, containing columns with carriages of electrode holders and crystallizers located on them, carriages of crystallizers, a short network with an average current supply and current source, characterized in that, in order to ensure melting both into separate crystallizers and In the common crystallizer, as well as in ingots with a large aspect ratio, each electrode holder is powered from a separate transformer, and each electrode holder ^ is equipped with a rotational drive relative to the electric an electrode carriage, the mold carriage having on adjacent faces x two places of attachment of molds. 2. Installation according to claim 1, characterized in that it is provided with an additional replaceable electrode holder installed between the main electrode holders. 3. Installation according to claims. 1 and 2, about the fact that the common crystallizer is installed simultaneously on all the carriages of the crystallizers.

Description

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The invention relates to ferrous and non-ferrous metallurgy and can be used in special electrometallurgy, in particular in the design of electrosshacko installations for remelting.

Installations of electrofishing remelting with several columns are known, which allow to obtain a high-quality ingot, the mass of which is limited by the total mass of the remelted electrodes that are simultaneously located in the clamps of the electrode holders. Production of flat ingots with an aspect ratio of more than 1:10 is impossible on such installations.

In order to eliminate the above disadvantages, a current lead from a separate transformer is provided to each electrode holder of the proposed installation, and each electric holder is simultaneously supplied with a drive for its rotation of the relative electrode carriage. In addition, each carriage

The mold has on the adjacent grains two places of attachment of the molds, and the pallets of the separate and common molds are equipped with independent rollback carts.

In order to obtain mass castings that exceed the total mass of electrodes simultaneously installed in the electrode holders, an additional adjacent electrode holder with electrodes is fixed fixedly between them with the main electrode holders. The middle points of the transformers are interconnected by interchangeable plates and brought to the pan of a common crystallizer. The disconnection of adjacent plates allows the midpoints of the transformers to be connected to the trays of separate crystallizers.

FIG. 1 and 2 shows a general view of the proposed installation when smelting into separate crystallizers; in fig. 3 and 4 - the same, when melting in a common mold.

The installation of electroslag remelting consists of columns 1, electrode carriages 2 moving along them, electrode holders 3 fixed to electrode carriages 2 and having the possibility of rotation relative to them by 90 using self-contained drives 4. Carriages of crystallizers 5 are moved along the column with

own drives 6. The mold carriages 5 are fixedly fixed to separate molds 7. The pans 8 of the molds 7 are equipped with independent trolleys 9 for rolling back ingots. The current lead to each main electrode holder 3 is implemented using a short, network 10 from individual transformers 11.

O To melt into a common mold 12, fixed rigidly to the carriages of the molds 5, there is a common tray 13 mounted on the trolley 14, an additional interchangeable electrode 5 holder 15 fixed rigidly between the electrode holders 3.

The middle points of the transformers 11 are connected using flexible cables 16 to pallets 8 or through a common

0 medium busbar 17 and detachable plates 18 - with a common pallet 13. The current supply to the additional removable electrode holder 15 is made using isolated from each other

5 current leads 19.

Work on the plant, configured to melt in separate crystallizers, is performed on each furnace independently, in the following sequence.

The main electrode holders 3, which are in the upper position, are equipped with consumable electrodes 20, which are insulated from each other. The trolleys 9 with the trays 8 are placed under the crystallizers 7, then the crystallizers 7 are lowered into the lower position so that the trays 8 enter the crystallizers 7. Liquid is poured

40 flux in the molds and in-on

the required value is lowered by the electrodes 20, the transformers 11 are turned on and current is applied to the electrodes. As the ingots 21 are fusing, the molds 7 move upwards and the electrodes 20 move downwards. At the end of the melting, the electrode holders 3 with the butts of the electrodes are raised by the carriages 2 to the extreme upper position, the molds 7 are also lifted by the carriages 5 upwards until the ingots 21 are released. Cinder 55 is removed from the electrode chambers.

To melt into the common mold 12, the setup is retooled: as follows. 3 The carriages 5 of the molds are installed at the same level and a common mold 12 is fixed on their side edges x-fixed but the molds 7 can remain on the carriage 5. The main electrode holders 3 are rotated relative to the electrode carriages 2 (columns 1) 90 common mold 12 using actuators 4, and are installed at the same level. Then, between the electrode holders 3, an additional removable electrode holder 15, similar to the main one, is fixed and rigidly fixed with it. its current leads 19 are connected from the main electrode holders 3. The detachable plate 18 is bolted at one end to the busbar drive 22, the midpoint of the transformer 11, and the other to the common busbar 17 connected to the common pallet ti. Thus, the average points 84 chi of the transformers 11 are connected to the common pallet 13. The remaining operations during smelting into the common mold 12 are similar to the operations of smelting into separate crystallizers. Electrodes 20 are placed in all electrodes. The common crystal. 12 is lowered and coupled to the common tray 13. The electrodes 20 are lowered into the common mold 12, where the liquid flux is pre-filled. The transformers 11 are turned on, current is supplied to the electrodes 20 and melting is performed. After the melting is completed, the electrodes 3 and 15 rise to the upper position, the common mold 12 rises up to release the obtained ingot 23, after what the cart 14 with the pallet 13 and the ingot 23 rolls out from under the common crystallizer 12.

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Claims (3)

1. INSTALLATION OF ELECTRIC SLAG AND Smelting, containing columns with e-electrode holders located on them and a crystalline-large aspect ratio, a current supply from a separate transformer is made to each electrode holder, and each electrode holder is provided with a rotation drive relative to the electrode carriage, and the crystallizer carriage has two adjacent faces connection points of crystallizers. 2. The installation according to claim 1, characterized in that it is a supply of molds, carts of molds, a short network with an average current supply and a current source, characterized in that, in order to ensure melting both in separate molds and in a common mold, and also receiving ingots with an additional replaceable electrode holder installed between the main electrode holders. 3. Installation according to paragraphs. 1 and 2, characterized in that the common mold is installed simultaneously on all mold carriages. 453078 A1