JPH01127145A - Continuous casting apparatus - Google Patents

Abstract

PURPOSE:To easily execute change of molds for short time by separately forming a mold unit and an electromagnetic stirring unit and constituting cooling system for the mold with the other system to cooling system for coil. CONSTITUTION:In the case of changing the mold 1 caused by wear and damage under remaining condition of the electromagnetic stirring unit, the mold unit A is taken out from the electromagnetic stirring unit, and the mold unit A is changed. Or, by removing/fitting a holding plates 12, 13 and a key plate 15, only the mold 1 is changed. In this case, as the mold unit A is separately formed with the coil 4 for the electromagnetic unit and a coil cooling jacket 5, the treatment is easy because of light weight. Further, the coil 4 and the outside cable are necessary to separate at the terminal part 41 and change of the mold units A or change of the molds 1 can be simply executed at short time.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention provides a continuous &
This relates to S-building equipment.

(Prior art) Conventionally, continuous casting equipment has been known to have four tm induction coils arranged around the mold in order to apply stirring force due to the 'fivA induction effect to the molten metal introduced into the mold. be. In this device, it is necessary to cool the 'ITf magnetic induction coil at the same time as cooling the molten metal through the mold. For that purpose, for example,
As shown in Publication No. 3Fl, a device in which an electric 11 induction coil is built into an annular cooling jacket provided around a mold is known, but this conventional device has the following problems.

■ In continuous casting equipment, it is necessary to replace the TAX 'II due to wear and tear on the copper tube that forms the mold or due to changes in the size of the cast slab, and the replacement work reduces the productivity of the continuous casting operation. In order to improve, it is required to be accurate and accurate in a short time, but F, conventional!
In this device, a plurality of cylindrical bodies with different diameters are arranged concentrically around a mold and surrounded by an outer casing to form a cooling jacket with a plurality of annular cooling water passages, and the inner annular Because the electromagnetic induction coil is integrated in the space, it is not possible to replace only the mold, but it is necessary to replace the mold, the electromagnetic induction coil, and the cooling jacket as they are integrated. At the time of replacement, it is necessary to attach and detach the internal coil and the external cable at the terminal section provided on the outer casing, which makes the replacement work very complicated and takes a long time, reducing productivity.

■ Moreover, exchange in advance! J! It is necessary to prepare a mold with an electromagnetic induction coil integrally assembled therein, and for this reason, spare coils corresponding to the number of replacement molds 1 are required, which increases the initial cost.

θ In the cooling system, high-quality water is required for the coil cooling water so as not to damage the insulation film of the conductor.However, although the amount of water required is a raw material compared to the amount of mold cooling water, in conventional equipment, the mold The cooling water system and the coil cooling water system are formed in series, and the coil is cooled using the water after the mold has been cooled, so it is difficult to use the cooling water for the mold located upstream of the coil. We will impose a water lit standard,
As a result, multiple holes and high-quality cooling water are required, and large-scale water treatment equipment is required, which increases the equipment cost.

0 Since the mold, the electromagnetic induction coil, and the cooling jacket for the mold and coil are integrated, the support structure that supports them on the fixed frame becomes larger, and in particular, the support structure that supports them through the mold vibration frame becomes larger. In this case, a large negative force is applied to the mold vibrating frame, and a large driving force of the mold vibrating device is required, resulting in large energy loss.

(Purpose of the Invention) The present invention was made in order to solve such problems, and to make it possible to easily replace the vJ type in a short time when the mold is worn out or damaged or when the slab size is changed. This increases machine availability, improves productivity, eliminates the need for spare coils, and separates the mold cooling system and coil cooling system, using high-quality refrigerant for coil cooling (high-quality cooling). Water) consumption can be significantly reduced, and
The purpose of the present invention is to provide a continuous casting device that can simplify the mold support structure and significantly reduce costs.

(Structure of the Invention) The present invention is characterized in that a mold unit is formed by a mold cooling jacket provided around the mold vI and a mold cooling jacket provided around the mold vI, and on the other hand, an electromagnetic action is applied to the molten metal passing through the mold Aj. An annular l
A 1tl stirring unit is formed and the above [! The cooling jacket is provided with a first refrigerant supply port and a discharge port, the coil cooling jacket is provided with a second refrigerant supply port and a discharge port, and the E electromagnetic stirring unit is provided with a first refrigerant supply port and a discharge port on the fixed frame. The mold unit is supported by a support means and is removably inserted into the inner diameter part of the electromagnetic stirring unit,
It is supported by the fixed frame by one stage of second support.

With this configuration, when mold wear and tear (n) or when changing the slab size, the mold can be replaced easily and in a short time, increasing machine operation rate and productivity. There is no need to prepare a coil, and the amount of high-quality refrigerant (high-quality cooling water) used for coil cooling can be significantly reduced, and the supporting structure of the mold unit can be simplified, resulting in a reduction of 1 stroke. .

(Example) Embodiments of the present invention will be described with reference to FIGS. 1 to 3.

Cast 31J unit A is open at both ends! #! L'!
1 and a mold cooling jacket 2 provided around the mold 1, the electromagnetic stirring unit B is separate from the mold unit 8, and consists of an electromagnetic induction coil 4 and a coil cooling jacket V provided around it. 5. The mold 1 is formed of a rectangular cylindrical copper tube for continuous rc casting of billets with a rectangular west face. However, the cross-sectional shape and material of the mold 1 are not limited to this embodiment.

The substrate 21 for the mold unit is formed into a rectangular planar shape, and the upper end of an inner cylinder 29 formed into a rectangular tube shape with a slightly larger diameter than the mold 1 is fixed to a square hole 211 provided in the center thereof. ing. A plurality of spacing adjustment protrusions 291 are protruded from the inner surface of this cylindrical body 29, and inside this n body 29! 1ffJ
1 is inserted between the cylindrical body 29 and the mold 1, an inner refrigerant passage 37 for mold cooling having a rectangular cylindrical cross section with both axial ends open.
is formed.

A cylindrical outer casing 27 is fitted on the outside of the cylindrical body 29, and the lower end of this casing 27 is connected to the lower end plate 13.
The lower end of the vI type 1 is fitted to the lower end plate 13 via the holding plate 14 so as to be slidable in the axial and direction, thereby forming the outer refrigerant passage 36 of the cooling jacket 2.
The refrigerant passage 36 and the inner refrigerant passage 37 communicate with each other at the lower end. Note that a plurality of reinforcing and flow-regulating partition plates 28 are arranged radially in the axial direction in the outer refrigerant passage 36, and the passage 36 is divided into a plurality of sections in the circumferential direction.

Also, l:&! At the bottom of the JJ plate 21, the inner cylinder 3
A relay chamber bottom plate 26 is connected to the upper end of the outer casing 27 around the upper part of the outer casing 27, and a relay chamber 34 is formed between the bottom plate 26 and the base plate 21 via an annular peripheral wall 25. A plurality of cut-out communication holes 35 are provided for each of the outer refrigerant passages 36.

) A peripheral wall 22 and an upper wall 23 are connected to the upper part of the plate 21, and an annular upper end plate 11 is connected to the center of the upper wall 23. The upper end of the mold 1 is removably fixed via a holding plate 12 and a key plate 15, thereby forming a refrigerant supply/discharge space around the upper end of the mold 1. Inside this refrigerant supply/discharge space, a pair of arcuate weirs 24 and a pair of partition plates 241 are provided to supply refrigerant v32 and discharge cold 1fi. 38 are partitioned. At the bottom of the refrigerant supply chamber 32, a refrigerant supply port 31 is provided on the outer side of the board 21 (on the left side in the drawing), and a communication hole 33 that communicates with the relay chamber 34 is provided at the bottom near the partition plate 25. is provided. The refrigerant discharge v38 is communicated with the upper end opening of the inner refrigerant passage 37 formed between the mold 1 and the inner cylindrical body 29, and is connected to the outer side of the substrate 21 (the right side in the drawing) at the bottom of the refrigerant discharge chamber 38. ) is provided with a refrigerant outlet 39. Further, the mold cooling jacket 2 is provided with drain holes (not shown) at the lower end or other appropriate locations as necessary.

On the other hand, the coil cooling jacket 5 of the electromagnetic stirring unit B
is separate from the mold cooling jacket 2 to the mold unit, and includes an inner 1III cylinder 51 surrounding the outer casing 27 of the mold cooling jacket 2, an outer casing 52 with a larger diameter, and a pair of upper and lower annular end plates. 53 and 54, and a lower annular partition plate 55 and a middle 1
ffia-shaped partition plate 56 is provided, and an inner refrigerant passage 62 and an outer refrigerant passage 63 whose upper ends communicate with each other are formed. An electromagnetic induction coil 4 is installed in the inner refrigerant passage 62, and the coil 4 is connected to an external cable (not shown) at a terminal portion 41 provided in the outer casing 52. Further, this coil cooling section jacket 5 is provided with a refrigerant supply pipe 61 that supplies refrigerant from the outside into the inner refrigerant passage 62, and a refrigerant discharge pipe 64 that discharges the refrigerant to the outside from the outer refrigerant passage 63.

The electromagnetic stirring unit B is installed on a support stand (first support means) 71 provided on the fixed frame 7, and the bolts 7
It is fixed by 2nd grade. Reference numerals 73 and 74 designate mold vibrating frames as second support means, which are supported by the fixed frame 7 so as to be able to vibrate via m-shaped &l, tJ\&mounts, springs, and the like. Then, with the mold cooling jacket 2 of the mold unit A removably inserted into the inner diameter part of the coil cooling jacket 5 of the electromagnetic stirring unit B, the substrate 21 of the mold unit A is attached to the mold vibrating frame 73, 74. It is removably supported on the top.

Next, the effect will be explained.

When continuous vI manufacturing is performed using the above continuous & 2r manufacturing equipment, molten metal (not shown) is introduced into the mold 1 from the upper part, and the first refrigerant is introduced into the casting qll cooling jacket 2 from the refrigerant supply port 31 to the mold unit. For example, in addition to supplying normal cooling water, a second refrigerant, such as high-quality cooling water, is supplied from the refrigerant supply pipe 61 of the electromagnetic stirring unit B into the cooling jacket 5, and the electromagnetic induction coil 4 is energized. By vibrating the mold unit A via the mold vibrating frames 73 and 74 by the vibration device ridges of the mold and causing the mold 1 to minutely vibrate, the molten metal introduced into the mold 1 is cooled within the mold 1. It is fed out from the bottom, and a billet with a rectangular cross section is continuously cast.

This continuous casting 3i! At time i, the first refrigerant, that is, normal cooling water, supplied from the refrigerant supply port 31 to the mold unit once flows from the refrigerant supply chamber 32 through the communication hole 33 into the relay chamber 34 as shown by the solid arrow. Is this relay? 34
The refrigerant then flows into the outer refrigerant passage 36 through the communication hole 35 .

After being rectified by each partition plate 28 in this passage 36, the coolant flows into the inner refrigerant passage 37 from the lower 41Ft1 opening of the inner cylinder 29, where the casting is cooled and its interior cooled. Cooling of the molten metal passing through takes place. The waste water after cooling the mold is once collected into the refrigerant discharge chamber 38 through the upper end opening of the inner refrigerant passage 37 and then discharged to the outside of the mold cooling jacket 2 through the discharge port 39 .

At this time, since the inner refrigerant passage 37 is narrowed, the flow rate of the cooling water passing through this passage 37 is high, and together with the rectification effect in the outer refrigerant passage 36, the heat exchange efficiency is increased, and the mold 1 and the molten metal in the mold 1 are efficiently cooled. Although a large amount of cooling water is used to cool the mold 1, the water quality standards for the cooling water are relatively loose, so normal cooling water can be used.

On the other hand, during the above-mentioned continuous casting, the mold unit A is slightly vibrated via the mold vibrating frames 73 and 74 by the mold movement device (not shown), and the mold 1 is slightly vibrated, and the above-mentioned? fi
When the 1M induction coil 4 is energized, an electromagnetic induction effect is exerted, and a stirring force is applied to the molten metal in the mold 1, which homogenizes the internal structure of the molten metal and performs continuous casting. The pieces are fed out smoothly. In this case, mold unit A and electromagnetic stirring unit B
and are supported independently from each other, the load on the mold vibrating device can be reduced, its driving force can be reduced, and energy loss can be reduced.

Furthermore, in the electromagnetic stirring unit B', the refrigerant supply pipe 6
The second refrigerant, that is, the high-quality cooling water supplied from 1, is
The refrigerant flows into the inner refrigerant passage 62, passes through the coil 4,
During this time, the coil 4 is cooled. The high-quality cooling water after cooling the coil flows from the upper end of the inner refrigerant passage 62 to the outer refrigerant passage 63.
The refrigerant is guided through the refrigerant discharge pipe 63 and discharged to the outside.

In this case, high-quality cold 141 water is required for the cooling water of the coil 4 so as not to damage the insulating film of the conductor.
Since the temperature increase rate is lower than that of mold 1, less water stone is required. Moreover, since the cooling system for mold 1 and the cooling system for coil 4 are formed separately, regular cooling water is used for the cooling system for mold 1, which requires a large amount of cooling water, and high-quality cooling water is required. The amount of water used in the cooling system of the coil 4 can be kept to the minimum necessary, thereby making it possible to reduce the cost of water treatment equipment.

Next, if mold 1 is worn or damaged, remove mold unit 8 from electromagnetic stirring unit B as shown by the two-dot chain line in Figure 1, leaving electromagnetic stirring unit B in place, and replace mold unit A. , or presser plate 12.
Only the mold 1 is replaced by attaching and detaching the mold 13 and the key plate 15. In this case, since the mold unit 8 is formed separately from the coil 4 and coil cooling jacket 5 of the electromagnetic II companion unit B, it is lighter and easier to handle than the conventional type with a built-in coil. Moreover, there is no need to separate the coil 4 and the external cable at the terminal section 41.
The mold unit or the mold 1 can be replaced in a short time and easily. Along with this, it is possible to increase the operating rate of the machine and improve productivity.

In the above embodiment, the refrigerant supply/discharge part and the relay chamber 34 in the mold unit A are provided in the upper part of the mold 1, but they may be provided in the lower part of the mold 1. The shapes of the first refrigerant circulation path and the second refrigerant circulation path for cooling the coil 4 are not limited to the above embodiments, and may be arbitrarily set according to the shape, dimensions, etc. of the mold 1. It is.

(Effects of the Invention) As described above, in the present invention, the mold unit and the electromagnetic stirring unit are formed separately, and the mold cooling system and the coil cooling system are configured as separate systems. It has the following effects.

■ When the mold is worn out or damaged, or when the caster size is changed, only the mold unit can be removed from the electric rIIi stirring unit, making it easy to remove the mold unit, and connecting the coil to the external cable at the coil terminal. There is no need to separate the mold, and the mold can be replaced easily and in a short time. This increases the operating rate of the fighting machine and improves the productivity of continuous casting.

■ Moreover, since the mold can be replaced while leaving the coil in place, there is no need to prepare a spare coil as in the past, and the initial cost can be reduced.

■ Since the &f type cooling system and the coil cooling system are separate systems, regular cooling water is used for the mold cooling system, which has loose water quality standards and requires a large amount of refrigerant, and for the coil cooling system, which has strict water quality standards. By using high-quality refrigerant (high-quality cooling water) only in the cooling system, the amount of high-quality cooling water used can be significantly reduced.
That water place]! TI equipment can be made smaller, equipment costs can be lowered, and costs can be significantly reduced.

■ Since the mold unit is supported by a support means separate from the electromagnetic stirring unit, the supporting structure of the mold unit can be simplified, and even if a mold vibration device is used as the support means, the load on the device can be reduced. In addition to reducing the strain, the driving force can be reduced, and energy loss can also be reduced.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the device of the present invention, and FIGS. 2 and 3 are cross-sectional views taken along the line [-n and -■] of FIG. A... Mold unit, B... Electromagnetic stirring unit, 1
... Mold, 2... Mold cooling jacket, 4... Electromagnetic induction coil, 5... Coil cooling jacket, 7...
・Fixed frame, 31...first refrigerant supply port, 32・
... Refrigerant supply chamber, 34... Middle M chamber, 36... Outer refrigerant passage, 37... Inner refrigerant passage, 38... Refrigerant discharge chamber, 39... First refrigerant discharge port, 61 ...Second refrigerant supply pipe, 62...Inner refrigerant passage, 63...Outer refrigerant passage, 64...Second refrigerant discharge pipe, 71...Support stand (first support means) , 73.74...Mold vibrating frame (
second support means). Patent applicant: Kobe Steel, Ltd. Agent
Patent Attorney Etsushi Kotani Patent Attorney Yasunu Itaya Patent Attorney Cho1) 1 Figure 1

Claims (1)

[Claims] 1. A mold unit is formed by a mold with both ends open and a mold cooling jacket provided around the mold, and an electromagnetic induction coil that applies an electromagnetic stirring force to the molten metal passing through the mold. , and a coil cooling jacket provided around the coil form an annular electromagnetic stirring unit, the mold cooling jacket is provided with a first refrigerant supply port and a discharge port, and the coil cooling jacket is provided with a second refrigerant supply port. A supply port and a discharge port are provided,
The electromagnetic stirring unit is supported by a first support means on a fixed frame, and the mold unit is supported on the fixed frame by a second support means while being removably inserted into the inner diameter of the electromagnetic stirring unit. A continuous casting device characterized by: