JPS5886958A - Method and device for horizontal continuous casting - Google Patents

Abstract

PURPOSE:To cool molten metal under stable cooling conditions and to obtain a good ingot by controlling electromagnetic force in such a way that the position where molten metal starts contact with a mold comes to a preset position. CONSTITUTION:When the amt. of the molten metal 12 stored in a tundish 1 increases and the static pressure acting upon the metal 12 near the boundary 17 increases, the diameter of a contracted part 22 increases. According to said increase, the position where the metal 12 starts contact with the inside surface of a mold tube 33 comes forward of a desired contact starting position 23 along the drawing direction 45 of the metal 12. Thereupon a control means 28 increases the electromagnetic force by the 2nd coil 21 by increasing the supply electric power from an electric power source 19. The increased static pressure is compensated by the increased electromagnetic force, the part 22 returns to the home position, and the position 23 is maintained in the desirable position. Thus the solidified thickness of a solidified shell 22 is maintained at a specified value and the good ingot is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a horizontal continuous casting method and apparatus. In conventional horizontal continuous casting equipment, molten metal flows between a mendecier nozzle made of a refractory material and a water-cooled solder. To prevent leakage, a tandem nozzle and a sword are fixed to each other. Therefore, the part of the water-cooled nozzle adjacent to the water-cooled mold is cooled and the solution is cooled. A solidified shell forms at the contact area and forms a solid layer on the Menditsch nozzle. In addition, the molten metal paulownia enters the pores of the refractory that makes up the tanditsh nozzle and solidifies, increasing the adhesion force. Therefore, when the cast body is pulled out, the solidified shell ruptures and a so-called breakout occurs. I was disappointed.

During this time III! In the prior art, a non-porous hardened silicon lining or a nitride carbon ring with excellent lubricity is hermetically connected between the tundish nozzle and the mold. These silicon nitride rings and boron nitride rings have long lifespans and are expensive, but even if these materials are used, they do not have the same mitigation effect as the tanditshu nozzle and the native shell. , since it is impossible to completely avoid the mold tube and the vertical mounting L sticking together, the 418 Showa 4
As seen in No. 7-15332, intermittent withdrawal is forced.

In order to solve these drawbacks of the prior art, an m-peak field generating means that generates a large magnetic flux density at the top and bottom of the molten metal is placed near the boundary between the tundish nozzle and the mold. A horizontal continuous casting equipment that squeezes the metal near the boundary has been suggested (Japanese Patent Application 1986-943).
33). By squeezing the molten metal in this way, the bath molten metal does not come into contact with the tundish nozzle, and as described above, the solidified shell is prevented from sticking to the tundish nozzle, and continuous drawing is prevented. It becomes possible. Furthermore, since the mendices nozzle and the mold do not need to be fixed together, it is possible to vibrate the mold, thereby preventing the solidified shell from sticking to the menditsch nozzle or the mold.

However, since the amount of molten metal stored in the tundish changes, the static pressure acting on the surface layer of the molten metal in the tundish nozzle and in the tundish also changes. During unsteady situations such as at the end of casting or when replacing the ladle, the liquid level of the molten metal in the tundish fluctuates greatly, and the static pressure of the molten metal in the tundish nozzle and mold fluctuates accordingly. In such a case, the position where the bath molten metal squeezed by the electromagnetic field generating means contacts the inner surface of the mold moves in response to fluctuations in static pressure.

When the contact position of the molten metal on the inner surface of the mold moves, the total cooling length within the mold changes. Since the solidified thickness changes accordingly, it becomes impossible to obtain a good hook piece. Furthermore, in the mold, since the static pressure is greater at the lower part of the molten metal, the contact pressure of the molten metal against the inner surface of the mold tends to be greater at the lower part, also due to the electromagnetic field generating means. Therefore, the cooling effect of the lower part of the molten metal becomes large and uneven cooling makes it impossible to obtain a good slab.

The present invention solves the above-mentioned technical problems, and solves the above-mentioned technical problem.
It is an object of the present invention to provide a horizontal continuous casting method and apparatus i in which the thickness of the V-well is made uniform along the circumferential direction.

Hereinafter, embodiments of the present invention will be described by way of example.

FIG. 1 is an overall system diagram of an embodiment of the present invention.

In this horizontal continuous casting equipment, a heating element 12 is provided in the tundish 1 to bring the temperature of the molten metal in the tundish 1 to t.

The cast body 4 from the mold 3 is pulled out from the cooling chamber 5 by a pulling device k6 and cut by a cutting device 7 to obtain an ingot 9. This ingot 9 is fed by a roller table 10. FIG. 2 is an enlarged sectional view of the vicinity of the mold 3.

Tanditshul is lined with fireproof material 11,
Dissociated metal 12 is stored. This Tanditshul
In this case, a tundish nozzle 14 made of a refractory material is attached by means of metal fittings 13. The mold 3 has a cooling passage 1st, in which a copper mold tube 33 is liquid-cooled, and a passage 16 for one body of the mold 3 coaxially communicates with the tundish nozzle 14. This mold 3 is fixed to a tundish nozzle 14. In the vicinity of the boundary 17 between the tundish nozzle 14 and the mold 3, an electromagnetic field generator [18] is provided, which consists of a coil surrounding the vicinity of the boundary 17 and is energized by alternating current power from a power source 19. Due to the electromagnetic field of the viewing hand 1R18, the molten gold j+1t2B flowing near the boundary 17 is reduced in diameter in the radial direction and softened. Therefore, in the vicinity of the boundary 17, the molten metal fi12 is prevented from coming into contact with the portion of the tundish nozzle 14 closer to the mold 3. Therefore, Tanditshu nozzle 1aKlil solid shell is li! It is possible to prevent the casting body 4 from sticking and to continuously pull out the cast body 4.

The electromagnetic field generating means 18 consists of a first coil 20 surrounding the vicinity of the boundary 17 and a second coil 21. The coil element side of both coils 20 and 21 of Korera is connected to the tundish nozzle 14.
and -S of the mold 3 are wound in the half-pole direction with an interval ts. When an excitation '#L current is applied to each coil 20, 21, the molten metal 12 receives an electromagnetic force j (
As a result, the molten gold 11K12 becomes embossed near the boundary 17. The l-th coil 20 is arranged almost concentrically with the tundish nozzle 14, and the second
Coil Iil 21F! It is eccentrically arranged so that its center position is located above the axis of the tundish nozzle 14. The first coil 20 applies an almost uniform electromagnetic force to the center of the molten metal 71412 over the entire chest of the tundish nozzle 14, and the second coil 21 applies a maximum electromagnetic force to the center of the molten metal 12 at the lower node. and let it work. In the tundish nozzle 14, maximum downward static pressure acts on the surface layer of the molten metal 12, so by applying maximum downward electromagnetic force by the second coil 21 as described above, , the dissociated metal 12 is narrowed by making the contact with the inner surface of the tundish nozzle 14 almost uniform in the circumferential direction KIG. Note that when the excitation current decreases, the molten metal 12 has a flow that is opposite to that when the excitation current increases. Since a visiting current flows and a negative force acts, a current absorbing plate ts' is provided radially inward of the first coil 20 and @2 coil 21 to absorb the reverse induced current. 0 A ring-shaped header 41 is formed on the tundish nozzle 14. This header = lKa, the nozzle 42 is formed radially inward of the tundish nozzle 14.0 This header 41 Ku, the O nozzle 42 through which the turbidity cleaner 46 is pumped through the snowy road 431 is iwa The ol14 lubricant 46 is located at the front of the pulling direction 45 relative to the metal 12 away from the tundish nozzle No. 1 relative to the IIL44.
The main components are powders of Fi, OaO, 8102, and Mu1203, and powders with good electrical conductivity such as pure iron and 00 are mixed therein.

In the sea bream lubricant 46 mixed with powder having good electrical conductivity, an electromagnetic force directed inward in the radial direction of the tundish nozzle 14 and the mold 3 acts on the powder having good electrical conductivity. As a result, the hook lubricant 46 is firmly attached to the entire outer circumferential surface of the f# metal 12 which has been subjected to ms. Therefore, the cleaning performance with the part that contacts the casting body passage 16 and the forging head is improved.
14 The lubricant 46 may contain rapeseed oil as a main component, and powder of pure iron, cobalt, etc. may also be mixed therein.

In a horizontal continuous casting equipment such as a machine, when the amount of accumulated metal 12 in the tanditsu l fluctuates, the amount of gold
The position 23 where the ring portion 22 of 412 contacts inwardly the mold tube 33 in the mold 3 and starts moves by one movement. In this case, the distance l at which the molten metal 12 contacts the mold tube 33 inwardly changes, and the #L solid thickness of the solidified shell 24 at the surface layer of the bath molten metal 12 changes, making it impossible to obtain a good hook cage. .

Therefore, for convenience of the present invention, 11L of the electric a rise generating means 18 is arranged such that the contact start position lI23 is supported at a desired position.
A position detection means 25 is provided near 0, that is, the desired contact circle starting position @23, where the magnetic force is adjusted. As shown in FIG.
They may be buried in the 6t-mold tube 33 at intervals t in the @ line direction. The compensating conductors 1jiA27 of these thermocouples 26 are connected to a stopper 25m' fixed to the outer wall 3aK of the mold 3. 2
In addition to 6, a temperature-sensitive body may be used, or a γ-fine sensor may be used to detect the contact PB start position. Note that the #i field force is large and affects the detection of the contact position411)1
The t- and stroke strokes may be detected during the time period when the power supply to the force generating coil 111a t'#L waterfall value is stopped at the 00 position.

The contact start position of the bath money 12 detected by the position detection means 25 is given to the control means 28, and the control hand lR2
8 adjusts the power supplied from the power source 19 to the second coil 21 so that the contact start position 1123 is at a preset substantially constant position. In other words, when the amount of molten metal 12 stored in the tundish l becomes comparatively large and the static pressure acting on the molten metal 12 near the boundary 17 becomes large, the fine pole s22
The diameter of the virtual Ill1129 becomes large. Accordingly, the position where the molten metal 12 starts vibrating against the inner surface of the mold tube 330 is a position forward of the desired contact start position 23 along the drawing direction number 5 of the molten metal 12. Therefore, the control hand R28 increases the power supplied from the power source 19 to increase the electromagnetic force generated by the second coil 21. As a result, the increased static pressure is compensated by the increased electromagnetic force, and the m Katsura s22 returns to its original position as shown by the string in FIG. 2, and the contact starting position 23 is maintained at the desired position. When the storage capacity of the molten metal 12 in 5-1 becomes relatively small and the static pressure near the boundary 17 becomes small, the diameter of the m-diameter portion 22 becomes small as shown by the imaginary line 30 in FIG. The contact start position is further away from the desired contact start position 1iI123 along the withdrawal direction 45. Then, the control means 28 reduces the power supplied from the power source 19 to 1, and the electromagnetic force by the second coil 21 is fully applied. Make it small. As a result, the cell membrane 22 urinates at its original position, and the praecox starting position @ 23 is maintained at a desirable position.

In this way, the mold tube 33 of the bath gold@12
The contact start position 23 to the inner surface is held at a predetermined constant position, so that the solidified thickness of the aI-shell 24 is maintained at a substantially constant value, and a good hook piece can be obtained. become.

In addition, the diameter of M @Iku 22 is red! Therefore, until the molten metal 12 begins to warp from the inner surface of the tundish nozzle 14, the ti 144 is also maintained at a nearly constant level. Therefore, the round nozzle 42 that supplies the lubricant 46'
The lubricant 46t can be stably supplied without any holes being closed by the crushed metal xkK.

Although the above-mentioned implementation example of company H controls the power supplied from the power source 19 to the second coil 21 according to the contact start position of the f# melting metal 12, as another embodiment of the present invention, the mold tube 33 Detects contact with both the upper and lower inner surfaces of the
The electromagnetic force from the second coil 21 may be adjusted so that their contact start positions are at the same set position along one direction of the axis. In that case, the power supplied from the power source 19 to the second coil 21 may be set to t*, or the electromagnetic force may be controlled by driving the second coil 21t up and down. With reference to FIGS. 4, 5, and 6, an embodiment in which the second coil 21 is moved up and down will be explained. In this embodiment, the second coil 21 is moved up and down by the driving means 31. will be moved. Moreover, the transition k11 is detected by the 9th position mm outputs [3a, 35 provided at the upper and lower parts of the mold tube 33 near the contact start position tic23, respectively, and the contact start position of the metal 12 is aligned with the axis of the mold tube 33. is controlled by the control intermediate stage 32 to be approximately at the N- position along the line and at a preset position.

A frame 36 is fixedly provided below the boundary 17 between the tanditsch nozzle 14 and the mold 3.
On both sides of the Mendish nozzle 14, columns 37.38 extending upward are erected, and a comb support 39.40 is provided at the upper JTIIIi portion of the columns 37.38. 1st
The coil 20 is housed in an Ml storage box 47 having a rectangular cross section perpendicular to the axes of the tundish nozzle 14 and the mold 3, and the first storage glaze 47 is fixedly provided in the GT cooling box 48. Inside the storage box 47, an inert gas is sealed or circulated for insulating cooling.
The internal pressure of the il cooling box 4B is such that the cooling water flows through it.
Both 11111 of o first support frame 49 are integrally fixed to
$50.00.00.00.90mm, 9.00mm, 50.51mm, 50.50mm, 50.00mm, 50.00mm, 50.00mm, 50.00mm, 50.00mm, 50.00mm, 50.00mm, 50.50mm, 50.00mm, 51.00mm, 50.00mm, 50.00mm.
Bolts 52 and 53 that extend downward Km and come into contact with the upper surface of the support base 39 and 40 are respectively screwed into the support bases 39 and 51.
．． Bolts 54 and 55 are respectively screwed into the bolts 40, which laterally abut against the sides of the flyover projections 50 and 51. Therefore, by tightening each bolt 52 to 55 degree protruding lid tThffi, the vertical and lateral force positions of the 11g1 support frame 49, that is, the first coil 20, can be arbitrarily and uniformly adjusted.

The wJ2 coil 21 is connected to the tundish nozzle #14 and the second
At the threshold with the coil 20, a glaze 56 with a rectangular cross section perpendicular to the axis surrounding the tundish nozzle 14 is housed in which an inert gas and an insulating coolant are circulated. . This second storage box 56Fi is firmly provided in the second cooling box 57 through which cooling water flows, and is integrally attached to the second support frame 58 of the second storage box 56 and the second cooling box 57#i. On the inner side of the first supporting frame 49, which is fixed to Sliding pieces 61 and 62 that slide on each guide member 59 and 60 are respectively fixed to the guide members 59 and 60. These guide members 59.60 and sliding pieces 61.62 allow the 'ig 2 support frame 58 and the
The coil 21 is guided in the vertical direction.

The drive + stage 31 has a side 1m moving piece 63.6 reefs and a connecting rod 65
, the second swing piece 66, the hydraulic cylinder 67, and the hydraulic supply k.
i+ stage 68. ai41 spreading piece 63.64,
It has an abbreviated shape, and one end sK of the roller 69, 70 is rotatably supported around an axis m along the pulling direction 45, and these rollers 69, 7G are attached to the lower surface of the second support frame 58. be touched. The bent portion of each first rocking piece 63,64 is pivoted by a pivot shaft 71,72 having an axis 1Iit parallel to the axis of rotation of the row 269,70, and these pivot shafts 71,72 are connected to the frame 36. Legs erected above 73°7
Supported by 4.

The connecting rod 65 extends below the xi support frame 49 along the pulling direction 45, and has a pivot point 71 at one end and midway.
．． , 72 are connected to axes 75, 76 extending parallel to them. These shafts 75, 76 are connected to the other ends of the first rocking pieces 63, 6.4, respectively.

The second swinging piece 66 has an abbreviated shape, and its bent portion is attached to the strut 3.
◎ One end of the second swinging piece 66 s#'i connecting rod 65 is pivoted at the fixed position of 8 by a pin 77 parallel to the pivot shafts 71 and 72.
It is connected to the other end via a bin 78 parallel to the bin 77.

The hydraulic cylinder 67d has an axis extending in the vertical direction and is supported by a column 384C, and the tip of its piston rod 79 is parallel to the bottle 78 and connected to the other end of the second swinging piece 66 via a piston 5Ot-. Concatenated.

In such a drive means 31, when the hydraulic cylinder 67 telescopically moves, the second swinging piece 66 moves around the bin 77.
The connecting rod 65 swings as shown by the arrow 81. It reciprocates in the axial direction as shown at 82, thereby causing the first swinging piece 63.64 to swing around the pivot shaft 71, 72 as shown at 83. Therefore, the nest 2 support frame 58 and the second coil 21 are moved up and down by the rollers 69 and 70. Note that a barb 84 is interposed between the upper surface of the second support frame 58 and the lower part of the upper part of the 116th disposal box 48, and the second support frame 58 is connected to the spring 84. They are equally urged downward by the spring force.

As shown in FIG. 7, the position detection means 34, 35 are provided to detect the start point of contact of the molten metal with the upper inner surface and the lower inner surface at the end of the mold tube 330 near the tamper nozzle 14. These position detection means 34, 35, like the position detection means 25 in the embodiment of FIGS. 1 to 3, include a plurality of thermocouples 85.
．． At 86', there is an interval ti in the axial direction of the mold tube 33.
34.35 Such a position detection means consisting of
The contact start positions at the top and bottom of the molten metal 12 are then detected by the control means 32.

I! FIG. 8 is a block diagram showing the configuration of the control means 32. Calculations of the signal line control means 32 from the 0 position detection means 34 and 35! a87t- to comparator 88. Ratio w
The signal from the setting device 89 is input to the Iit device 88, and the comparison -88 is 3! (transition) 87 and setting -89 to give a signal corresponding to the difference between the two m-order voltages to the #b90 o #10 s90 controls the hydraulic pressure supply means 68 in accordance with the signal from the ratio @@SS.

By such a control means 32, the mold tube 33
The upper and lower positions 11 of the second coil 21 are moved by the driving means 31 so that the contact start position of the bath molten metal 12 to the inner surface of the upper and lower parts is the same position along the edge direction at the upper and lower sides, and is also a preset optical position. Controlled 0 As described above, the contact start positions of the inner surface of the mold tube 33 and the melted metal 12 are set at the upper and lower parts.
When the molten metal 120 is held in the same position, the side portions of the molten metal 120 are also necessarily in the same position. Therefore, the melting metal h12 starts contacting the inner surface of the mold tube 33 at the same set position along the axial direction over the entire inner circumference of the mold tube 33. Thereby, mold tube 33
Since the length of the cooling zone in the bath molten metal becomes uniform over the entire circumference, and the thickness in the aluminum direction becomes uniform over the entire circumference, a good cast slab can be obtained.

As another embodiment of the present invention, a thickness gage 91.92 may be provided at the outlet of the mold 3 to measure the thickness t of the solidified shell in the upper and lower surface layer parts of the #M metal shell 12, as shown in FIG. As shown in FIG. The damage of the solidified shell at the exit of the solidified shell is fed back to the control of the drive means 31, enabling more precise control.
．． Instead of 92, it is also possible to use a transmissive surface temperature needle.

As a further Km embodiment of the present invention, the first coil 20 may be omitted in the embodiments shown in Figs. Wi4 to Fig. 8.

FIG. 9 is a cross-sectional view of another embodiment of the present invention; a wire passes through the molten metal 12 through the nozzle hole 95 of Ll;
A sliding gate 96 is provided for passage,
This sliding gate 96 is an electromagnetic field generating means formed by winding a piece of wood around the tundish nozzle 14 near the end of the O tundish nozzle 14 near the mold 3, which is driven by a driving cylinder 97. 98 is placed. By the mm force by the electromagnetic field generating means 9B,
The am Kinpeng 12 flowing inside the Menditzsch nozzle 14 is
Squeezed radially inward. The mold 3 has a larger inner diameter than the tundish nozzle 14. Near the lake surface facing the tundish nozzle 14 of the mold 3 at the boundary 17 between the tundish nozzle/%/14 and the mold 3, another electromagnetic field generating means 99 is installed in a plane inclined by an angle θ with respect to the drawing direction 45. will be placed in In addition, an induced current absorbing plate 98°99 is located inside the electromagnetic field generating means 98,99.
is provided.

Figure 31g10 shows f#! near boundary 17! Molten metal 12
This is a diagram showing the static pressure distribution acting on the surface layer. Static pressure acts on the surface layer of the molten metal 12, which acts as a joist toward the bottom. Therefore, as shown in FIG. 11, the static pressure distribution shown in FIG.
Electromagnetic field generating means 981 having a shape almost symmetrical to 9101
, the distribution of the electromagnetic force is as shown in Figure ii [10
3, that is, a cyber force distribution concave inward at the hook # of the molten metal M12 is obtained. If the static pressure shown in FIG. 10 is compensated for by the electromagnetic force given by such an electromagnetic force Iv103, the dynamic portion 22 will have a shape with an expanded diameter in the lateral direction. 7ζ, if the shape of the electromagnetic field generator *98 is slightly concave inward from both curves, the electromagnetic force Ih#i is shown by the broken line 'tl-104. It is similar to the song 111101 showing the static pressure distribution of the song *104, and when the electromagnetic field generating means 98 of such a shape is used, the contraction part 22 and the inner surface of the tundish nozzle 14 The distance 1lIlt- can be made almost uniform along the circumferential direction.

The electromagnetic field generating means 99 is constructed by winding the wooden wire around the thin string of the lead 3. For the strands of electromagnetic field generating means 99! When a current flows directly to the paper surface Kfi in Fig. 9 and toward the back of the paper surface, the fence in the mold 3 - metal, the metal wire 12, is drawn in front of the paper surface of @9- and is indicated by the reference numeral 105. A magnetic current is generated, and magnetic elevation occurs in the direction of the arrow 106. Therefore, an electromagnetic force is generated in the molten metal [12] in the mold 3 toward the front along the drawing direction 45, as shown by the arrow 107. Of course, the electromagnetic field generating means 99 is provided downwardly and in front of the drawing direction 45 in the same way, inclined at an angle θ with respect to the axis of the mold 3.

As a result, a large amount of electric power is applied to both the upper part and the lower part of the # wishes (1 & 12) in the mold 3. Therefore, the molten metal 12 in the mold 3 maintains a flat surface substantially perpendicular to the drawing direction 45. Therefore, the solidification conditions at the position where the molten metal 12 contacts the inner surface of the mold 3 are uniform over the entire circumferential direction. In this way, the contact length of the molten metal 12 within the mold 3, that is, the cooling capacity, does not differ between the upper and lower positions, and a uniform anti-soldering effect can be obtained.

Even in such an embodiment, the tundish nozzle 14*! of the mold 3! ! For example, a number of thermocouples 108 are provided at any position in the circumferential direction of the mold tube 330 near the end of the thermocouple 109. Electric power is supplied to the electromagnetic field generating means 98 and 99 so that the contact start position 112 of the molten metal 12 detected by the position detecting means 109 is a predetermined constant position.

Controlled by control means (not shown). Therefore, regardless of fluctuations in the static pressure acting on the surface of the molten metal 12 in the vicinity of the boundary 17, the contact-start position [112] remains at a substantially constant position, and a good slab can be obtained. Furthermore, since the separation initiation position [113] is also kept constant, the nozzle 42 of the lubricant 46 is never closed.

Figure 12 is a front view of another embodiment of the present invention;
The figure is a section 1rl seen from the section line nu -xm in figure @12.
W Tellosu, Figure 14 Haril 3rj4O cutting surface m1n
A cross-sectional view seen from t-XJv. In this example,
The inclination angle II of the electromagnetic field generating means 99 in the embodiments shown in FIGS. Maintain the same foot position throughout the starting position mt.

The electromagnetic field generating means 99 is housed in a storage box 116 filled with inert gas and made of non-magnetic material.
16 is a cooling unit consisting of a non-magnetic material through which cooling water flows @lx7
At the outer periphery of the cooling box 117 fixedly installed inside,
Axis li of tanditshu nozzle 14! A pair of trunnion shafts 118 and 119 are fixed at right angles to 11 and extending Km in the horizontal direction. These trunnion shafts 118, 1194d
, trunnion bearing 12 identifiably supported in mold 3
Accepted by 0.121.

Each trunnion shaft 118, 119 is a hollow cylindrical body, and a cylindrical body 122 connected to the housing 116 passes through one trunnion shaft 118t and projects outward. This cylinder 12
The outer end of the cylinder 1 is closed, and a tube 123 through which a round cable connected to the electromagnetic field generating means 99 is inserted is connected to the cylinder 1.
The outer end f of 22 is concentrically penetrated and protruded. Tube 1
The power supply cable 1 is connected to the end of 23 via a rotary joint 124.
2syr&! A sealed gas supply hose 127 is connected to the outer end of the cylindrical body 122, which has a zero housing, through an H-transfer joint 126i.
is connected. Note that the supply pressure of the sealed gas is
The pressure is set higher than the pressure of the cooling water in the storage box 117, so even if the seal on the storage fil 16 is incomplete, the cooling water may flow into the storage box 116 and cause an accident such as electric leakage. Prevented.

Inside the cooling box 117, there is a zero trunnion shaft 1 partitioned by a partition plate 128 on the axis of the other trunnion shaft 119.
A water supply pipe 129 and a drain pipe 130 are inserted into the water supply pipe 19 , and one end of each of the water supply pipe 129 and the drain pipe 130 is connected to the cooling box 117 on one side of the line partition plate 128 . The other end of the drain pipe 130 penetrates concentrically with the trunnion shaft 119t and projects outward. A water supply hose 132 is connected to the other end of the water supply pipe 129 via a rotary joint 131, and a drain hose 134 is connected to the other end of the drain pipe 130 via a rotary joint 133t. The zero pressure cylinder 115 that is discharged after going around the inside of the cooling glaze 117 has an axis parallel to the mold 3 near the other trunnion shaft 119 and is added to the mold 3. In the middle of the other trunnion shaft 119 is a drive lever 135 extending radially outward.
The tip of the piston rod 136 of the drive means 115 is coupled to the outer part of the drive lever 135. Therefore, the trunnion shafts 118, 119 are extended and retracted by the hydraulic cylinder l15'i. Around the axis
The electromagnetic field generating means 99 swings as shown by arrow 137.

In this way, the electromagnetic field generating means 99
The angle θ formed with is arbitrarily 11! ! Ill be ill.

There is #! near the base of the mold tube 33 near the tundish nozzle 14. Position detection means 138 and 139 are provided at the upper and lower portions, respectively, for detecting the melting metal contact start position. These position detectors *tas, 1
Reference numeral 39 is given to a control means (not shown) having the same configuration as the control means 32 shown in FIG. The ζ hydraulic cylinder 115 is controlled so that the ceramic position is set in advance.According to this embodiment, # is easily adjusted to the #-angle of 1tL99 during electromagnetic field generation in response to fluctuations in static pressure. You can adjust the power. Furthermore, since the trunnion support structure is used, power supply and water supply and drainage can be carried out extremely easily. Moreover, the heat generated by the electromagnetic field generating means 99 and the electromagnetic field generating means 99 from the *financing machine 12
Since the heat given to the JR99 is absorbed by the cooling water, there is no possibility that the JR99 will overheat while generating an electromagnetic field. Furthermore, since the electromagnetic field generating means 99 is supported on the mold 3 side, it is convenient for receiving the reaction force t from the molten metal 12. In addition,
When the mold 3t is configured to vibrate, it is necessary to support the electromagnetic field generating means 99 on a frame of the mold linear motion device.
Il! llI is I! 151m17) Cutting surface line xvt -
This is a simplified cross-sectional view as seen from In addition, the electromagnetic field generating elements 142 are arranged more densely in the lower part of the molten metal 12 than in the upper part of the molten metal 12. becomes K when a large magnetic flux flB degree is applied. When current flows through the coil 141 in the direction of arrow number 14,
A hook current is generated in the molten metal 12 in the direction of the arrow 145.
The direction of the magnetic field generated by the electromagnetic field generating element 142 is indicated by the reference numeral 146. Thus, the direction of the magnetic field generated by the electromagnetic field generating element 142 is
12 is acted upon by an electromagnetic force directed inward in the biological direction.

During such electromagnetic field generation R143, each electromagnetic field generating element 142U has multiple groups, for example, four tp on top, bottom, left and right.
Divided into F147, 148, 14, 9, 150, power supply 151° 152, 153, 15 for each group 147-150
4 is connected. In addition, frame position detection means 155, 156 are provided in the mold tube 3 corresponding to each of the groups 147 to 15G.
, 157, 158 are provided. The contact start positions of the m-metal 12 detected by these position detection means 155 to 158 are inputted to the control means 159, respectively.

The control means 159 controls the six electric currents 11 so that each contact start position coincides with the same position set in advance along the axis of the mold 3.
Controlling the power supplied from i151 to 154 Also by this damping, the cooling conditions of the molten metal 12 are made uniform over the entire circumference, and a good slab can be obtained.

FIG. 17 is a front view of another embodiment of the present invention. This embodiment is similar to the embodiments shown in FIGS. 12 to 14 described above, but it is noteworthy that the electromagnetic field generator R99 is molded. 3 axis!
In other words, the trunnion bearings 120 and 121 are supported on the support truck 160, and the hydraulic cylinder 151 is also supported on the support truck 16.
Supported at 0. Below the tanditshu nozzle 14 and the mold 3, there are tanditshu nozzles l 4 , !
: Parallel rails 161 are laid, and the support cart 160 can move freely on the rails +61J:.
A rail 16 is located at a fixed position below the support cart 16G.
A hydraulic cylinder 162 having an @ line parallel to 1 is supported, and a piston rod 163 of the hydraulic cylinder 162 is pin-coupled to the support cart 160 .

Therefore, by telescopically driving the hydraulic cylinder 162i, the support cart 160 moves on the rail 161 with the stoppers 1 at both ends.
64, 165, and thus the electromagnetic field generating means 99 is moved along the axis of the tundish nozzle 14.

In this embodiment, the electromagnetic field generating means 99 is moved in the drawing direction 45.
Since the molten gold can move along
By changing the contact start position by 1tt, the cooling conditions can be completely changed.

Moving the electromagnetic field generating means 99 along the drawing direction 45 as in the embodiment of FIG. 17 L1 In relation to the embodiments of FIGS. 4 to 8 and FIGS. It is also easily done.

As another embodiment of the present invention, the position flt@output means 25, 34, 35, 109° 138.1 in each of the above embodiments is
39,155 to 158 are omitted, and the amount of power supplied or the amount of movement of each electromagnetic field generator &18°98.99,143 is controlled by the solidification thickness gauge 91.92 at the exit of the mold 3, and the electromagnetic force t is - It may be adjusted.

As still another embodiment of the present invention, as shown in FIG.
It may be controlled to a position 3 forward in the drawing direction 45 than i167. If this is done, the contact length of the molten metal 12 with the mold tube 33 will be different at the top and bottom, and the contact length at the bottom will be small, but The lower part of the molten metal 12 has a greater contact pressure with the mold tube 33. Therefore, even if the contact length is relatively short, the cooling conditions are the same as in the upper part.
Therefore, the solidified thickness can be made uniform over the entire circumference of the molten metal 12.

In another embodiment of the invention, each hydraulic cylinder 67.11
5,162 may be rotated by a pneumatic cylinder or by a motor 0 or each of the above! J! In the example, the case where the axis-perpendicular cross section of the tundish nozzle 14 and the mold 3 is rectangular is shown, but the tundish nozzle 1
4 and the mold 3 may have a circular cross section perpendicular to the axis.

As described above, according to the present invention, the electromagnetic force is controlled so that the cooling state of the M melt maple at the start point 11 of contact of the molten metal with the mold or at the exit of the mold is at a preset position or state. Regardless of fluctuations in the static pressure acting on the second layer of molten metal, cooling can always be achieved under stable cooling conditions, and good slabs can be obtained.

Further, since the position at which the molten metal separates from the tundish nozzle is also held at a set position, the @t agent can be stably supplied.

[Brief explanation of the drawing]

FIG. 1 is an overall system diagram of an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the vicinity of the mold 3, and FIG. 3 is a position detection means 25.
4 is a sectional view of another embodiment of the present invention, FIG. 5 is a sectional view taken from 1#V-ma at section 1 in FIG. 4, and FIG. 6 is a sectional view of another embodiment of the present invention. 7 is an enlarged sectional view of the vicinity of the fourth mold 3. FIG. 8 is a block diagram showing the configuration of the control means 3-2. A sectional view of another embodiment of the present invention, FIG. 1θ is a diagram showing the static pressure distribution acting on the surface layer of the molten metal 12 near the boundary 17 in FIG. 9, FIG. 11 is a diagram showing the electromagnetic force distribution,
FIG. 12 is a front view of another embodiment of the present invention, FIG. 13 #i
Cut plane 1 in Figure 12! Cross-sectional view seen from XI-Im,
FIG. 14 is a cross-sectional view as seen from the cut IO edge xtv -IN in FIG. 13, FIG. 15 is a cross-sectional view of another *embodiment of the present invention, and FIG. 16 is a cross-sectional view of the cut IO edge xtv -IN in FIG. 15. Figure 18 is a simplified round cross-sectional view of another embodiment of the present invention, and Figure 18 is a simplified round cross-section of another embodiment of the present invention. Mold, 12... Molten metal, 14...I
dish nozzle, 17...boundary, 18,98. e
ta. 143...Electromagnetic field generating means, t9. t5t, i52゜153.154...Power supply, 20...First coil, 2
1...Island 2 coils, 23,112,166.167.
...Contact start position, 24...Coagulation-shell, 25,3
4゜35 e i 09 e i 38 m l 39
m k 55 m k 56 m157.158...
・Position detection means, 28t32*159...Control i1 means 31 ml・Main plow means, 45...Side control direction, 67
．． 115,162...Hydraulic cylinder, 91°92...
・Coagulant thickness meter, 160...Support cart by Urato Patent attorney Kei Nishi

Claims (1)

[Claims] An electromagnetic field generating means is disposed near the boundary between the ill tundish nozzle and the mold, and an electromagnetic force is applied to the mochi-metal near the boundary in the center direction or in the pulling direction. - The electric power supplied to the electromagnetic field generating means is supplied to the electromagnetic field generating means so that the metal comes into contact with the inner surface of the mold or at the exit of the mold. (2) An electromagnetic field generating means is arranged near the boundary between the tundish nozzle and the mold, and the casting method at the boundary point is Electric power is applied toward the center or in the drawing direction, and the cooling condition of the cormorant is applied to the position where the bath-metal comes into contact with the inside of the mold or at the mold exit. In the direction along the axis of the electromagnetic field generating means t1 tandem nozzle, I! The vertical direction perpendicular to the IJ axis, and the axis -K
ik angle horizontal axis - at least 4 any one of the directions around
111JI141 by moving the electromagnetic force along two directions.
A method of horizontal threading that makes the process more difficult. (3) The cooling state of the bath molten metal at the mold outlet is detected by determining the thickness of the solidified shell. FF-Claim 1 and #'
i, 2nd] Horizontal continuous casting method described in IJ. (4) The cooling state of the molten metal at the mold outlet is detected by establishing the surface temperature of the solidified shell. . (5) Electromagnetic field generating means placed near the boundary between the tundish nozzle and the mold and applying a '*-force in the direction of the center of the molten metal JgK near the boundary or in the pulling direction, and contact of the molten metal inward of the mold. The means for detecting the cooling state of the molten metal at the starting position or mold outlet, and the '411 field generating means are arranged in a direction along the edge of the tundish nozzle, in an up-down direction perpendicular to the above-mentioned rectangular line, and perpendicular to the front axis. Horizontal axis IIi! A driving means that moves in at least one of the surrounding directions, and a movement k of the electromagnetic field generating means by the driving means so that the detected value of the detecting means becomes a predetermined value according to the detected value of the detecting means. 1. A horizontal continuous casting apparatus, comprising: control means for controlling the horizontal continuous casting apparatus.