DE2357095A1 - FURNACE FOR ELECTRIC SLAG MELTING OF METAL BLOCKS - Google Patents

Description

Institut Elektrosvarki imeni E ₀ O. Patona P 51 319

",, ..", ",,. "_," November 15, 1973

Akademii Nauk Ukramsko ^ SSR,

Kiev / USSR ^{L / Br}

Furnace for electroslag melting of metal blocks

The invention relates to furnaces for electroslag melting of metal blocks used in electrometallurgy mainly used for melting sheet metal slabs.

There is known a furnace for electroslag melting a metal block which has at least a pair of pillars attached thereto attached trolleys containing the electrode holder, which drives for a vertical adjustment of self-consuming Have electrodes that are remelted to form a block that forms in a cooled mold »

In the known furnaces, the technological possibilities for melting are often due to an insufficient number of Electrode holders and limited number of degrees of freedom. This applies in particular to furnaces for melting of sheet metal slabs.

409846/0662

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One or two self-consuming ones are melted in these ovens Electrodes in the "Electrode-Base" or "Electrode-Electrode" circuit.

Recently, there has been a need for an electric slag furnace for melting large sheet metal slabs with a weight up to 80 t. It is desirable to use both large sheet metal slabs and medium-sized blocks in one and the same furnace and smaller dimensions of 5 to 10 tons.

For the production of high-quality blocks in such a wide range it is necessary firstly to have different numbers of electrodes for each block and secondly different numbers of electrodes To use variants for their introduction into the cooled mold. Plus, it's when melting oversized blocks for a more even distribution of the consumable electrodes in the slag bath and accordingly in the metal bath}) heat is desirable to have an electrode adjustment also along the slag bath. Furthermore it is desirable when melting ingots of medium and small dimensions without noticeably reducing the Oven performance to get along.

409846/0662

The purpose of the present invention is to eliminate the stated drawbacks.
The invention has for its object to provide a furnace for

Electroslag melt from metal blocks with such

To develop electrode holders, which allow the melting of sheet metal slabs with a mass of up to 80 t without noticeable Allow a reduction in furnace performance when melting any type of smaller blocks and at the same time Allow optimal production process when melting blocks of any type to be heated.

This task becomes an electroslag smelting furnace of metal blocks, the at least one pair of columns with attached trolleys for electrode holders contains, which have drives for their vertical adjustment as well as the self-consuming electrodes, which are remelted to form a block that forms in a cooled mold by using the furnace according to the invention having current-supplying plates on the facing side surfaces Adjacent electrode holder are attached and. a seat for holding at least one additional self-consuming Form electrode, the drives for a vertical adjustment of the trolleys of the electrode holder are arranged coaxially and facing each other with loose shaft ends on which interact with each other stepping halves of a coupling can be placed.

409846/0682 -4-

An oven with at least two electrode holders and one attached to said electrode holder power supply plates and the correspondingly attached drives is provided with coupling halves, allows the melting of sheet metal slabs with a weight of up to 80 t without any noticeable reduction in furnace performance a transition to melting blocks of any other type and securing one for everyone at the same time Block optimal production process.

The presence of a seat between two electrode holders and coupling halves on the output shafts of the Trolley drives of the electrode holders allow the total drive power to melt in the circuits "Electrode-Electrode" or "Electrode-Base" to use the entire intermediate row of blocks, the mass of which is the mass which exceeds blocks which are melted by means of an electrode holder.

It is advisable to mount horizontal guides on each trolley with the electrode holders in them to attach and to provide them with additional drives for their adjustment in the guides.

The adjustment of the electrode holder with the current-supplying plates in the horizontal direction enables self-consuming electrodes of various transverse dimensions to be fastened in the seat and this Laifl ^ Pcigs slag bath

409846/0662

ORfGfNAL

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to move at the same time as the electrodes are melted, which are attached to the closest electrode holders are"

The furnace can be equipped with trolleys on each column for cooled molds and with drives for a vertical one Provided adjustment, which are arranged coaxially and facing each other with loose shaft ends, being on the the latter coupling halves are placed, which can interact with each other.

This enables the total output of two drives for adjusting a cooled mold to melt blocks with a greater mass than it is to use Drive power allowed «

It is advisable to have a common mold on the trolleys mentioned for melting consumable electrodes attached, which are fixed in several electrode holders. This allows one to melt blocks that are in bulk and in scope Exceed blocks, which are melted separately in molds, which are attached to ^ iner trolley.

To explain the invention, further details of the furnace design are provided with reference to the accompanying drawings described, it show:

4098A6 / 0662 _ ₆ _

ORIGINAL JNSPEGTED /

Fig. 1 shows an oven with two electrode holders, the combined drives of which hold an additional consumable electrode in a seat between these electrodes. brackets is attached. Front view ι Fig. 2 a section H-II in Fig. 1?
3 shows a furnace with a self-twisting electrode of considerable dimensions arranged between the electrode holders , view from the front; ...

4 shows an oven, in its outer and middle electrode holder there are self-consuming electrodes held in place by combined drives, view from the front;

FIG. 5 shows an oven in whose outer electrode holders there are self-consuming electrodes, view from FIG in front;

6 shows a furnace with separate trolley drives of the electrode holders for successive melting of blocks in different molds, front view;

7 shows an oven - view from the rear, in which the trolley drives the electrode holder and the mold carry coupling halves.

409846/0862

The furnace for electroslag melting of blocks 1 (Fig. 1) contains, as in this example, at least two columns 2, on each of a trolley 4 and 5 along the corresponding Column is slidably mounted. The drives 6 and 7 for adjusting the trolleys 4 * and 5 of the electrode holders 8 and 9 in the vertical direction are arranged coaxially and facing each other with free shaft ends 1o and 11, on each of which a coupling half 12 and 13 is attached.

On each trolley 4 and 5 horizontal guides 14 and 15, 16 and 17 (Fig. 2) are mounted in which the Electrode holder 8 and 9 (Fig. 1) arranged and by means of additional drives 18 and 19 for adjusting "the electrode holder 8 and 9 can be moved in the horizontal guides "are»

On the facing side surfaces of adjacent Electrode holder ^ 8 and 9, sin_d power supply plates 2o and 21 attached, which form a seat for holding at least one additional consumable electrode 22, the is then located between the consumable electrodes 23 and, which are fastened in the electrode holders 8 and 9 are.

In the lower part of the furnace there is a carriage 25 with a base 26, which is at the beginning of the melting process of the block 1 is arranged under a mold 27. in the

4 09846/0663

During the melting of the consumable electrodes, the liquid metal bath 28, over which the slag bath 29 is located, is formed at the top of the block. I ₁

A remelted self-consuming electrode 3o (Fig. 3) can »even if it has considerable dimensions, between the electrode holders 8 and 9 are attached, which are attached to the trolleys 4 and 5 with the combined drives 6 and 7 are. The mold 27 can be attached to trolleys 31 and 32 (Fig * 7), one of which is attached to the corresponding one Column 2 and 3 is slidably mounted along this. For the simultaneous adjustment of the mentioned trolleys 31 and 32, their drives 33 and 34 are arranged coaxially

net and provided with coupling halves 35 and 36 which are placed on free facing shaft ends 37 and 38.

To melt blocks in separate molds with separate adjustment of the electrode holders 8 and 9 (Fig. 6), the coupling halves 12 and 13 (Fig. 6) of the drives 6 and 7 of the trolleys 8 and 9 as well as the coupling halves 35 and 36 (Fig. 7) the drives 33 and 34 of the trolleys 31 and 32 of the molds are disengaged.

The self-consuming electrodes 23 and 24 (FIG. 5) can be fastened in the electrode holders 8 and 9 when the coupling halves 12 and 13 are disengaged.
+) 4 and 5 of the electrode holder

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It is possible a variant where a is fixed from the consumable electrode 24 (Figure "4) in the electrode holder 9 and the other in the" seat gehildet by on the side surfaces of the adjacent electrode holder 8 and attached stromzüführenden plates 2o and 21 The drives 18 and 19 enable the adjustment of the electrode holders 8 and 9 with respect to one another in the horizontal direction when the additional self-consuming electrode 22 or 3o is to be fixed in the seat and, if desired, the self-consuming electrodes along the wide wall the mold 27 to distribute.

The oven works as follows.

The pedestal is on the carriage 25 (Fig. 1) for discharging blocks 26 set up, on which the cooled mold 27 is set up, whereupon the slag bath 29 is prepared.

Electrical energy is supplied to the self-propagating electrodes ^ to 24 from a power source (not shown). The coupling halves 12 and 13 are the drives 6 and the electrode holders 8 and 9 and the coupling halves 35 and 36 of the drives 33 and 34 of the trolleys 31 and 32 of the molds 27 coupled and between the outer electrode holders 8 and 9, the additional consumable electrode 22 is attached. So three pairs of electrodes in common mold 27 melted. When heat is generated, the self-consuming electrodes melt in the slag bath 29

ORIGINAL INSPECTED 409846/0862 " ^1o "

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22 to 24, the metal bath 28 is created, under which the block 1 freezes. In this way, a large block of metal can be melted. The same large block can be melted from a pair of self-consuming electrodes 3 (Fig. 3) with a large cross-section. These electrodes can be attached between two electrode holders 8 and 9 using the total power of the drives 6 and 7 whose coupling halves 12 and 13 are coupled. To fasten such self-consuming electrodes 3o, the electrode holders 8 and 9 are guided by means of the drives 18 and 19 apart by the required amount.

A large block 1 (Fig. 4) can also be melted when one of the consumable electrodes is in one of the outer electrode holders and the other is between the power-supplying plates of the electrode holder is attached. This variant is useful for melting large blocks, which have a relatively small cross-section.

For the production of medium and small blocks, melting takes place with separate utilization of the performance of the Drives attached to each column. The coupling halves 12 and 13 (Fig. 5 and 6)

inspected 40 984 6/06

uncoupled. In this case one also uses two carts with pedestals / each of which is under a corresponding one Mold is set up. SD the electrodes can be fed to these molds and remelted independently of one another A separate supply of self-consuming electrodes and their horizontal creation can also be done in the Slag bath of a common mold, which is set up on two carriages / with the coupling halves 12 and 13 (FIG. 1) of the drives 6 and 7 are disengaged if no additional self-consuming electrode 22 is used is, while the coupling halves 35,36 (Fig.7) of the drives

Si
33 and 34 of the trolley 31 are coupled.

All the examples of ingot smelting described show that the furnace has great adaptability to a large number of technological combinations for the realization of the electroslag smelting of metals and alloys, so it enables both large, medium and small ingots with high output to produce,

Claims (4)

P 51 319 1 10 November 15, 1973 -Uf ₁ j ,, ... .. · ..-. S, L / Br Claims F i.iOfe for electroslag melting of metal blocks, - * - of at least one pair of columns with attached to them Contains trolleys for electrode holders, which drives for a vertical adjustment of self-consuming electrodes have, which are remelted to form a block forming in a cooled mold, thereby characterized in that current-supplying plates (2o and 21) are provided which face one another Side surfaces of adjacent electrode holders (8 and 9) are attached and a seat for the holder at least an additional self-consuming electrode (22) and the drives (6 and 7) for vertical adjustment the trolleys (4 and 5) the electrode holder (8 and 9) coaxial and with free shaft ends (1o and 11) to each other are arranged facing, on which coupling halves (12 and 13) are placed, which interact with each other are bringable. 2. Oven according to claim 1, characterized in that on each trolley (4 and 5) horizontal guides (14 and 17) are provided in which the electrode holders (8 and 9) are displaceable and that additional 409846/0662 ~ ² ~ Drives (18 and 19) for adjusting these electrode holders are provided in the guides (14,17). 3. Oven according to claim 1, characterized in that for cooled chill molds (27) trolleys (31 and 32) are provided, one of which is attached to each respective one Column (2 and 3) is mounted, and that drives (33 and 34) are available for their vertical adjustment, which are arranged coaxially and facing each other with free shaft ends (37 and 38), on which coupling halves (35 and 36) are attached, which can be brought into interaction with one another. 4. Oven according to claim 3, characterized in that on the trolleys (4 and 5) have a common cooled mold (27) for melting consumable electrodes (22 to 24) is attached, which are fastened in several electrode holders (8 and 9). 409846/0662