JPS59159251A - Method and apparatus for casting molten metal in horizontal continuous casting - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of H-charging molten metal, particularly molten steel, in horizontal continuous casting, and an apparatus for carrying out this method.

Such a method and apparatus is for connecting the drawing device and the casting strand by means of a dummy bar at the beginning of casting. In this case, the method is based on a so-called semi-continuous casting method, that is, a casting method in which a drawing device is inserted and the drawing operations 17 are repeated in each casting process.

In such a known method and device for withdrawing the strand by means of a dummy bar in horizontal continuous casting, the injection nozzle from the injection vessel into the casting mold is closed by a fusible stopper, and then the injection vessel is filled with molten metal. The plug is injected and the melting of the plug is delayed until the slag within the molten metal rises and leaves the area of the injection nozzle. In this way, it is avoided that the strand skin is damaged by slag parts or heat-resistant particles during the drawing process.

Such known methods can fully meet the requirements of completely draining and drying the storage container and the inner surface of the horizontal continuous casting mold, but the molten metal injected around the dummy par head can be completely drained and dried. Since cooling is accelerated, it is necessary to intensively and firmly connect the solidified molten metal to the dummy par head.

The object of the present invention is to cool the molten metal well and at the same time form a forced connection between the cooled molten metal and the dummy par head t5, and in this case, to easily pull out the dummy par head from the horizontal continuous casting mold. It is an object of the present invention to provide a method and a device that enable this.

The method according to the invention which solves this problem consists of: first, after preheating the horizontal continuous casting mold, the storage container is closed by means of a closure part; and at the same time, a dummy bar head cavity is opened in the horizontal continuous casting mold. forming and closing this continuous casting mold, and then injecting molten metal into the dummy bar head cavity 13, and then injecting the molten metal into the dummy bar head cavity 13 (after a predetermined period of -7 The drawing process of the cast strand can be started at (a).

According to this method, the molten metal flows smoothly around the dummy metal using the inner wall of the mold, and the outer range of the molten metal is immediately solidified by cooling the horizontal continuous 1vj mold. can be done. in this case,
on the inner wall of the mold. The advantage has been obtained that the casting material can be stirred to a certain extent, and a further advantage has been obtained that the start time of the drawing operation when drawing the casting strand can be defined very precisely. Therefore, the casting strand can be withdrawn from the horizontal continuous casting mold very easily without causing complications.

In an advantageous embodiment of the method according to the invention, the molten metal level in the reservoir is at least equal to the injection (
level is exceeded, the molten metal flows into the hollow chamber defined for the dummy bar head.
It's on. This 3) method of temporal control via the closure member of the storage vessel allows a sufficient amount of melt to flow around the dummy bar head to most quickly fill the hollow space around the dummy bar head. Advantageous when using metals.

The device according to the invention for carrying out the above-described method is provided with a closure for a horizontal continuous casting mold which partitions a dummy bar head cavity, the closure being connected to the dummy bar head and C and the dummy bar head has at least one arm extending obliquely from the inside to the outside with respect to the radial plane of the dummy bar head and having an intermediate position relative to the inner wall of the mold wall. I ended up keeping the room. The dummy bar head configured in this way has the advantage that it does not come into contact with the inner wall of the horizontal continuous casting mold, and therefore does not form complications when withdrawing the casting strand from the horizontal continuous casting mold. . Moreover, this dummy bar head allows casting strand 1
The connection between δ and the pull rod is very secure.

According to an embodiment of the invention, the closing body, the dummy bar head and at least one closing element for closing the inlet formed in the furnace brick are connected to each other. In this case, the spacing of the closing body relative to the closing element for the furnace brick must be kept precisely, but the advantage is that the furnace brick can be closed reliably via one or more closing elements.

Furthermore, it is advantageous if the closure element for closing the person consists of one or more meltable metal roots arranged one after the other. For such metal plates, aluminum is particularly suitable for casting different steels. By arranging a large number of metal plates one after the other in this way, it is possible to precisely control the melting time and thus the filling time for filling a hollow space. In order to define this filling time more precisely or to control this filling time accordingly, according to a further embodiment of the invention, a measuring sensor is provided for detecting the molten metal level in the hollow chamber; A measurement sensor conduit extends across the cross section of the extraction rod and is connected to a measurement and adjustment and/or control circuit.

Such electrical measuring and regulating and/or control circuits work in that the measuring sensor consists of two measuring poles that can be electrically connected via the molten metal.

Next, the configuration of the present invention will be specifically explained with reference to the embodiment shown in the drawings. The illustrated horizontal continuous casting mold 1, insulator 3, and intermediate ring 4
and a storage container 2 with a wear-resistant seal ring 5 interposed therebetween.
3, heating additives are assigned to temperatures below the melting temperature.
- the molten metal, in particular steel, continuously flows into the storage vessel 2 during the casting operation;
The liquid flows into the horizontal continuous casting mold 1 through the injection port 6, and is then thoroughly solidified and stirred in this horizontal continuous casting mold to form the casting stock.
- Extracted as Rand.

Continuous casting of molten metal is carried out even after the connection process for connecting the casting strand and the drawing rod 7 has been completed, in order to transmit the drawing and drawing forces to the casting strand 1.

Water 3) In the second stage after the preheating of the non-continuous casting mold is completed, 1
1"i') LV: The cutting tool 2 and the horizontal continuous casting mold are closed simultaneously (tC). In the illustrated embodiment, the device for performing this closure is a plurality of guxoite circles connected to the drawing rod 1. It is composed of a closing body 8 consisting of plates 3a and J.Moreover, a dummy bar head 9 is attached to the pull-out rod γ.
is connected, and this dummy bar \rad 9 is closed with a metal rod 10 (having a meltable metal plate 1, 11a as the eleventh). metal plate 11
a and/or the quantity of metal material in the metal plate 1ia, the time and amount at which molten metal begins to penetrate into the horizontal continuous casting mold is controlled. By moving the extraction rod T with the dummy parhead 9 together with the metal rod 10 and the metal plate 11a, the population 2a of the furnace brick 2b is automatically closed. During this movement, only the graphite disk 8a slides on the inner wall of the mold wall 1a. In this way, the mold wall 1a
Even if there is only a small portion in contact with the inner wall of the device, there is a small chance that this inner wall will suffer damage. On the other hand, the pull rod 7 is mounted inside the horizontal continuous casting mold 1 while maintaining an air gap 12 with play.

A device, i.e. a dummy bar head, is provided for connecting the drawing rod 7 to the casting strand, which is mounted 11 on the closure body 8 and axially fixedly connected to the drawing rod 7. The dummy bar head 9 is arranged 61 within the dummy bar head cavity 13. This hollow chamber 1
The volume of 3 is calculated for this hollow chamber 13 together with the chamber 7 forwardly connected to this dummy bar head hollow chamber 1.
The filling time for 3 is also specified 1, dummy parhera 1
A radially outwardly directed arm 9a is fixed to 9, which arm A 9a holds an intermediate chamber 14 against the inner wall of the mold wall 1a. The dummy bar head 9 is connected to the drawer and rod 7 by a fixing member 15 in the longitudinal direction of the casting strand.

For another method of determining the time for injecting molten metal into the interior of the dummy bar head cavity 13, a measuring sensor 16 is provided, the drowsy conduit 1 of which measuring sensor 16
6a and 161) extend through the passageway 17. The passage 11 itself is constituted by a groove 17a formed in the mold wall 1a and a groove 17 formed in the drawing rod 7. The passage 17 is configured such that air displaced by the molten metal in the hollow chamber 13 escapes through this passage 17 into the atmosphere. 4 conduits 16a and 16b are connected to a power source, and in the case of , conduits 15a and 16b
A signal transmitter 19, for example a pilot ring, is arranged on one of them. As soon as the measuring electrode 20 is electrically connected by the flowing molten metal, the signal transmitter 19 optimally announces the end of the molten metal injection process, so that the extraction operation can be started using the extraction rod 7 and the extraction device (not shown). can do. Conduits 16a and 1
It is clear that 6b is used as a measuring circuit, a regulating circuit and/or a control circuit.

[Brief explanation of the drawing]

The drawing is an axial cross-sectional view of one embodiment of the horizontal continuous casting mold according to the present invention before the stage of horizontal continuous casting of σ8 steel or steel alloy. 1. Horizontal continuous casting mold, 1a... Mold wall, 2. Storage container, 2a... Person D, 21)... Furnace brick, 3. Insulator, 4. Intermediate ring, 5 Seal. Ring, 6...?
I person 1-17... Pull-out rod, 8 - Closing body, 8a
...graph eye) disk, 9 dummy par head, 9
a--Arm, 10--Metal rod, 11--Closing part, 11 a--Metal plate, 12--Air gap, 13--Dummy bar head hollow chamber, 14--Intermediate chamber, 15--Fixing member , 16・Measurement sensor, 16 a,
16 b = conduit, 17 - passage, 17 a...
17 b-groove, 18・Power supply, 19・Signal transmitter, 20
・・Measuring electrode (1 other person)

Claims (1)

[Claims] 1. A method for pouring molten metal in horizontal continuous casting, which first preheats the inside and/or outside of a horizontal continuous casting mold, and then fills the storage container with molten metal. After preheating the horizontal continuous casting mold (1), the storage container (2) is closed by a closing member (11), and at the same time the horizontal continuous casting mold (1) is closed. A dummy bar head hollow chamber (13) is formed in the dummy bar head cavity (13), and the continuous casting mold (1) is closed using a lever, and then molten metal is injected into the dummy bar head hollow chamber (13). A method for casting molten metal in horizontal continuous casting, characterized in that the withdrawal operation of the casting strand is started after a predetermined time has elapsed in connection with a predetermined press-in state of the Rad hollow chamber (13).2. When the molten metal level in the storage vessel (2) exceeds the level of at least the injection)'U (6) of the horizontal continuous casting mold (1), the hollow chamber (13) defined for the dummy bar head (9) is 2. The method according to claim 1, wherein molten metal is introduced into the molten metal. Preheat the inside and/or outside of the horizontal continuous casting mold,
In an apparatus for performing a method of casting molten metal in horizontal continuous casting, in which a storage container is then filled with molten metal, a horizontal continuous casting mold (1) partitions a dummy bar head hollow chamber (13); A closure (8) is provided for the dummy bar head (9).
), the dummy bar head (9) having at least one arm (9a) 1. -C1 The arm (9a) is FJ'J ML dummy par head (9)
It extends obliquely from the inside to the outside with respect to the radial plane of the mold wall (1a) and ends with an intermediate chamber (14) held against the inner wall of the mold wall (1a). 4), Casting device for molten metal in horizontal continuous casting. 4 The closure body (8) and the dummy par head (9)
7. The device as claimed in claim 6, wherein: and at least one closing member (11) for closing the inlet D (2a) formed in the furnace brick (2b) are connected to each other. 5 Closing member for closing the previous ii2 population (2a) (
4. Device according to claim 4, wherein 11) consists of one or more meltable metal plates (lla) arranged one after the other. 6. A measuring sensor (16) for detecting the molten metal level is provided in the hollow chamber (13), the conduits (16a, 16 b) of the measuring sensor (16) being connected to the drawing rod (7) σ The device according to claim 5, which extends in the cross section and is connected to a measuring and regulating and/or control circuit. 7. The measurement sensor (16) consists of two measurement poles (20) electrically connectable via molten metal.
An apparatus according to claim 6.