JPH0199719A - Continuous casting equipment - Google Patents

Abstract

PURPOSE:To improve energy-saving efficiency at the time of continuous casting by fitting an equipment wherein a continuous ingot is curved in an upward direction to make a coil and arranging a heat insulating cover to cover a coil setting part in the equipment. CONSTITUTION:Molten metal is continuously poured from a tundish 1 through a nozzle 2 and an ingot 8 formed is corrected in a horizontal state through bending rollers 6 and horizontal bending rolls 10. Then, the ingot is formed into a coil 30 in a coil forming equipment having two lower bending rollers 31 and an upper bending roller 32. In this case, coil hangers 56, 57 are inserted into a coil inner diameter part and a heat insulating cover 54 is interlocked and fitted to prevent the coil 30 from releasing heat. Hereby, temperature is prevented from lowering before the coil 30 enters a roller 42 and energy-saving efficiency at the time of continuous casting and rolling is improved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an apparatus for manufacturing a thin rolled plate by rolling a thin slab cast by a continuous casting machine, and particularly relates to a device for producing a thin rolled plate by rolling a thin slab cast by a continuous casting machine, and particularly relates to a device for producing a thin rolled plate by rolling a thin slab cast by a continuous casting machine. This invention relates to a continuous casting device that manufactures coils using a coil forming device while preventing the above.

[Conventional technology]

An example in which a thin slab obtained by a continuous casting machine is wound up to produce a coil, and then the coil is unwound and rolled to reduce its thickness is disclosed in JP-A-58-100903'.

In order to produce rolled plates from slabs obtained through continuous casting, one of the most important factors in producing rolled plates in a rational manner is how to reduce the dissipation of the high-temperature heat of the slabs. This is an important issue, but in the past, no measures were taken to prevent heat radiation when winding slabs and manufacturing coils.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, the slab produced by a continuous casting machine is once wound into a coil shape, and then the slab is unwound and rolled to reduce its thickness, which causes the following problem of heat dissipation from the slab.

That is, the processing speed from casting to winding in the casting line is limited by the casting speed of the casting machine, and cannot be made high. On the other hand, the speed of the rolling line is almost unlimited and high-speed rolling is possible.

Therefore, a drop in temperature of the slab due to heat dissipation from the slab in the casting line becomes a major problem. In particular, since it takes a long time to wind up a coil of slab, heat dissipation during the winding operation becomes a problem.

Normally, the dimensions of the slab wound into a coil are plate thickness 20 to 35 II.
n, the plate width is 600 to 160oIla. Also, the winding speed of this slab is synchronized with the casting speed and is 10 to 15 m.
/minute. The weight of the coil after being wound is 15-2
Since the weight is 0 tons, the winding time for one coil is approximately 5 tons.
~10 degrees is required. Since the time required for winding is long, it is difficult to realize direct rolling without reheating when the coil is wound in an open state as in JP-A-58-100903, as the temperature of the coil decreases significantly. It is. Therefore, in the case of JP-A-58-100903, it was often necessary to supply heating energy to the coil housing section to reheat it. In particular, the above-mentioned Japanese Patent Application Laid-Open No. 58-1
In 00903, the bending mechanism for the slab is not disclosed, but since the coil is wound in a downward direction, there are actually a number of casting bending roller mechanisms and the like for producing the coil above the coil. need to be placed.

Therefore, since it is difficult to provide a mechanism for preventing heat radiation during winding of the slab, the slab is wound in an open state.

Heat radiation from the coil is prevented only in the coil storage section where the coil is stored after winding is completed.

An object of the present invention is to wind up a plate-shaped slab that is continuously cast on a horizontal plane upward using a coil forming device, to facilitate the installation of a coil heat-retaining cover, and to maintain heat retention in the coil setting area. By doing so, it is possible to obtain a plate-shaped slab coil that is hotter than the conventional one.

[Means for solving problems]

The above problem is solved by winding the plate-shaped slab cast by a continuous casting machine into a coil of a predetermined length on a substantially horizontal plane, then unwinding the coil with an unwinding device, and rolling the plate-shaped slab with a rolling machine. A continuous casting and rolling device for reducing thickness, comprising: a coil forming device that bends the plate-shaped slab upward to form a coil; and a coil heat retention cover that covers a coil setting portion formed by the coil forming device. Accordingly, a coil rotation and movement device for directing the terminal end of the coil toward the rolling device; a coil setting portion formed by the coil forming device; a coil setting portion rotationally moved by the coil rotation and movement device; This is solved by having a coil heat retaining cover that covers a coil setting portion to be rewound by an unwinding device.
゛〔Function〕 By winding the high-temperature plate-shaped slab continuously cast on a horizontal plane upward by the coil forming device, it is possible to install a coil heat-retaining cover that prevents heat dissipation from the coil. A coil rotation moving device for covering the coil setting portion formed by the coil forming device with the coil heat retaining cover, and for unwinding the coil by an unwinding device and continuously rolling the plate-shaped slab by a rolling device. The terminal end of the coil is rotated toward the rolling mill, and each coil setting portion of the coil forming device, the coil rotation moving device, and the unwinding device is covered with a coil heat retaining cover.

〔Example〕

A first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

In FIG. 1, a heat retaining cover for the coil is provided inside the coil transfer device to prevent heat radiation from the coil during formation of the coil.

The slab 8 to be wound up is continuously poured with molten metal from the dumpster 1 through the nozzle 2 into a mold made up of a belt 5 that is guided by guide rollers 3, 4.7 and rotated in the direction of the arrow. Manufactured by This slab is bent by a bending roller 6, and horizontal bending rollers 10 and 11 built into a stand 12 are bent by a cylinder 9,
13, and then re-bent horizontally by a straightening machine with intermediate rolls 14 disposed thereon.

Moreover, the width is adjusted by a width rolling mill equipped with vertical rolls 15 and horizontal rolls 16, if necessary.

The cast strip 8 thus passed is bent upward by a coil forming device equipped with two lower bending rollers 31 and one upper bending roller 32 to form a coil 30. This coil 30 is supported by support rollers 33 during winding.

In this embodiment, the coil is wound by bending the slab upward in this way, and a coil heat retaining cover 5 is installed to cover the coil setting part in order to prevent heat radiation from the coil during coil winding.
This makes it easy to install the item 4.

The wound coil 30 is transferred to a coil support roller 37. FIG. 1 is a cross-sectional view showing the coil heat retention situation in the coil setting portion of the coil forming apparatus and the transfer of the coil in this case.

The coil being wound as illustrated in FIG. 2 is mounted on a coil winding stand 28 and supported by support rollers 33. This support roller 33 is rotationally driven by a drive system (not shown). When the coil has been wound to a predetermined length, a shaft 26 having a rotating blade shown in FIG. 1 is rotated within the cutting stand 25 to cut the slab 8. After cutting the slab, the winding speed is increased and the following shaking is performed before the following slab enters the winder.

In FIG. 2, the gear 58 is rotated and the two coil hangers 56, 57 are inserted into the inner diameter of the coil. The coil heat retaining cover 54 of this embodiment is attached to the hanger 56, 57 so that it operates simultaneously with the movement of the hanger.
．． It is attached to 57. 2 hangers 56.5
7 can move from side to side within the hanger 59.

The movement of the hangers 56, 57 is performed by driving the gear 58 by a motor 74 shown in FIG. 3, which shows a front cross-section in FIG.

In FIG. 2, the hanging tool 59 is suspended from a lifting frame 66 via a pin 60 and a bearing 61.

Then, the motor 65 rotates a pinion 62 via a speed reducer 64 to rotate a gear 63 attached to the hanger 59, which eventually rotates the hanger 59 and allows the coil 30 to rotate on a horizontal plane.

This rotation of the coil 30 on the horizontal plane is performed on the support roller 37 shown in FIG. 1 in order to direct the coil end 34 toward the rolling mill. Thereby, the winding end direction of the coil can be aligned on the coil unwinding roller 40 of the primary coil unwinding machine.

Now, in FIG.
The piston 67 of 9 is actuated downward by 1 to move it up and down.

In this way, the coil 30 is lifted from the support roller 33, and the coil moving cart 70 is made to run on the rails 72 on the gutter 73 using the wheels 71. This feeding operation will be explained with reference to FIG. After lifting with the lifting frame 66,
The coil 30 is transferred to the next coil support roller 37.

During this coil transfer, the hanging tool 59 in FIG.
Rotate the coil so that the end of the coil faces the rolling direction.
It can be rotated 180 degrees on a horizontal plane.

At this position, the coil hangers 56 and 57 shown in FIG. 2 are removed from the inner diameter of the coil, and the hangers 56 and 57 are raised by the cylinder 69 to insulate the next coil.
The coil forming device is returned to the neck position. This operation is repeated in actual operation.

If it is necessary to store coils, a coil heat retention furnace 90 may be provided as shown in FIG. 4 which shows the planar arrangement of FIG. 1.

The coil moves inside the coil heat retention furnace 90 from arrow A to B.

The coil is transferred in the C direction and transferred to the coil unwinding roller 40.

Of course, the coil heat retaining cover 54 may be fixedly attached to the hanging tool 59 as shown in FIG.

In this case, holes 50 are provided so that the coil support portions of hangers 56 and 57 can pass through.

In addition, the coil heat retaining cover 54 in FIG. 5 is designed to prevent collision between the cover and the coil when returning to the coil forming device after the coil 30 is fed into the coil support roller 37 in FIG. As shown in FIG. 6, the cover 133 divided around the hinge 132 may be lifted up by a cylinder or the like (not shown). Of course, after passing through the coil, E
Put this cover back in the direction.

Further, at this point in time, winding on the support roller 33 is often started as shown in FIG.

Therefore, when the coil 30 at the beginning of winding is present on the support roller 33, the left cover is lifted in the D direction around the hinge 136 when facing the page of FIG. All you have to do is return it to .

By doing so, the required stroke of the lifting cylinder 69 shown in FIG. 5 can be reduced.

As mentioned above, the transferred coil is shown in FIG.
The coil unwinding roller 40 is rotated, the tip of the coil is tapped out with a punching knife 41, and the slab 8 is transferred to the rolling mill 4.
2 to produce a hot sheet product 44, which is passed through a guide roller 45 and wound onto a drum 46 as a product coil 47.

Using the three bending rollers shown in Figure 1 as a coil forming device, the slab is bent upwards and wound onto the upper part of the coil support roller by using a forming device that creates a coil, that is, by using the top winding method. The coil heat insulating cover can be easily installed without the need for any additional equipment, and since the end of the coil is reoriented in the rolling direction during the process of transferring it to the coil unwinding device, the heat dissipation time is reduced. Can be shortened. In this way, when forming a coil at a speed that is synchronized with the production of slabs in a casting machine, a high-temperature coil can be obtained by installing a coil heat-retaining cover.
Compared to conventional coil formation without a coil heat retention cover, it is possible to prevent a temperature drop of approximately 50°C from the average temperature. As a result, when handling steel slabs, a wound coil can be obtained at a temperature of approximately 1050°C, and the temperature of the rolling mill is over 1000°C, including the temperature drop of the slab during subsequent coil transfer and after unwinding. It is possible to supply high temperature slabs.

A second embodiment of the invention is shown in FIGS. 7 and 8.

FIG. 7 shows coil heat retention that retains heat not only for the coil 30 on the support roller 33 but also for the coil 30 on the next coil support roller 37 and all coil setting parts of the coil 30 on the coil unwinding roller 40. This is an example in which a cover 54 is provided.

and the coil support roller 3 of the coil 30 on the support roller.
7 is transferred to the rotating pin 1 attached to the pedestal 100.
An arm 104 that rotates around 02 and this arm 1
04 and is movable in the coil axis direction.
A swing arm type coil transfer machine consisting of 3.
It is transferred as shown by the two-dot chain line. Transferred coil 3
0, the rotary stand 115 supporting the coil support roller 37 is connected to the pinion 11 on the rotary stand 114 via the bearing 116.
7 and gear 118 to rotate the coil 180 degrees to orient the coil end 34 in the rolling direction. Note that a partition 130 may be provided inside the coil heat retention cover.

Furthermore, an upper and lower partition 141 that moves up and down in six directions may be provided between the coil 30 on the support roller and the coil 30 on the coil support roller.

When sending a coil to the coil heat retention furnace 90 shown in FIG.

Alternatively, when sending out, as shown in Figure 8, the door 12
This is done by rotating the foil 111 with the rope 142 via the pin 113 and lifting the door 121 in two directions.

The foil 111 is supported by a foil bearing 110, and the pillar 10
It is rotated by a motor 112 provided at 9. By covering the coil from winding to unwinding with a coil heat retaining cover in this manner, an even greater heat retaining effect can be obtained.

An example of application of this embodiment is shown in FIG. The rolling mill used in FIG. 9 includes rolling rolls 87. This is a case where one rolling mill composed of reinforcing rolls 88 is used to perform thickness reduction rolling. In the rolling operation, first, the slab 8 sent from the coil unwinding support roller 40 is rolled by the rolling roll 87, and the rolled plate 96 after being rolled is fed by the pinch roller 89 and guided by the guide 91. It is wound around a drum 93 as a rolling coil 92.

This rolled coil 92 is heated in a heating furnace 95. In this work, the guide 85 is tilted downward. After all the coils 30 have been rolled, they are then rolled in the opposite direction with rolling rolls, and the tip of the coil 30 is rolled with a pinch roller 84. It is guided by a guide 85 and wound onto the coil 82 on the other drum 81 . This work is also performed within the heating furnace 83. Rolling while winding onto the left and right drums 81 and the tram 93 is repeated. In order to roll the slab from a thickness of 30III+ to a thickness of 2, the number of times of rolling by the rolling rolls 87 is approximately 5.

After this rolling is completed, the guide 91 is pushed down, the product coil 47 is formed on the drum 46 via the guide roller 45, and the rolling operation is completed.

In Fig. 9, one rolling mill is rearranged, but of course two or more rolling mills may be arranged, but if three or more are installed, the first rolling mill
Compared to the rolling mill dandem arrangement shown in the figure, there is not much advantage in terms of equipment costs.

In any case, when rolling is performed repeatedly in this way, the temperature of the slab decreases during rolling.

Therefore, it is important to supply a high-temperature coil, but in this example, the coil is manufactured using a coil heat-retaining cover, so
It has the advantage of being able to supply a sufficiently hot coil.

In FIG. 9, the partition 130 in the coil heat retention cover 54 is moved up and down like the IJ 120 shown in FIG. The coil may be transferred to a coil unwinding roller 40.

Further, in FIG. 9, if there is no problem in terms of production volume, the arrangement of the coil rewinding roller 40 may be stopped and the coil support roller 37 may be used as the rewinding roller.

In this way, the number of coils in the coil heat retention cover 54 becomes two, which reduces the space and improves the heat retention capacity.

〔Effect of the invention〕

According to the present invention, a plate-shaped slab that is continuously cast on a horizontal plane is wound upward by a coil forming device to form a coil, and the end portion of the coil is rolled by a coil rotation moving device. A coil heat retention cover that prevents heat radiation from the coil covers each coil setting part from coil formation to just before rolling, minimizing convective heat transfer from the coil to the air and heat dissipation by radiation. This makes it possible to obtain a plate-shaped slab coil at a higher temperature than before, and it also becomes possible to directly roll the coil obtained by continuous slabs, which is extremely effective in terms of energy saving.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a continuous casting and rolling apparatus showing an embodiment of the present invention, FIG. 2 is a sectional view of the coil forming device section of FIG. 1, and FIG. 3 is a front sectional view of FIG. 2. Figure 4 is a plan view of Figure 1 when using a coil heat retention furnace, Figure 5 is a cross-sectional view of the coil heat retention cover attachment part when the coil heat retention cover is integrated with the hanging tool, and Figure 6 7 is a front cross-sectional view of the coil heat insulating cover when both sides of the coil heat insulating cover can be opened and closed, and FIG. 7 is a diagram showing the second embodiment of the present invention. A front cross-sectional view of the coil heat-retaining cover when covering each coil setting part until return, Figure 8 is a cross-sectional view of Figure 7 showing the opening/closing operation of the door of the coil heat-retaining cover, and Figure 9 is a cross-sectional view of the main body. FIG. 2 is a diagram showing an example of application of the invention, particularly a reversible rolling method for slabs. 8... Slab, 30... Coil, 31... Lower bending roller, 32... Upper bending roller,
33... Support roller, 34... Coil end, 37...
... Coil support roller, 40 ... Coil unwinding roller, 42 ... Rolling machine, 44 ... Hot thin plate product, 47.
... Rolled coil, 54 ... Coil heat retention cover, 59.
... Hanging equipment, 66... Elevating frame, 70... Coil transfer trolley, 90... Kocha Z Figure! 3 fig. 4 fig.

Claims (1)

[Claims] 1. A plate-shaped slab cast by a continuous casting machine is wound into a coil of a predetermined length on a substantially horizontal plane, and then the coil is unwound by an unwinding device to rewind the plate-shaped slab. A continuous casting and rolling device that reduces the thickness using a rolling device; a coil forming device that bends the plate-shaped slab upward to form a coil; a coil heat retention cover that covers a coil setting portion formed by the coil forming device; A continuous casting device characterized by having: 2. The plate-shaped slab cast by a continuous casting machine is wound into a coil of a predetermined length on a substantially horizontal plane, and then the coil is unwound by an unwinding device, and the thickness of the plate-shaped slab is reduced by a rolling device. In the continuous casting and rolling apparatus, a coil forming apparatus that bends the plate-shaped slab upward to form a coil; a coil rotating and moving apparatus that directs the terminal end of the coil toward the rolling apparatus; forming with the coil forming apparatus; a coil setting portion that rotates and moves by the coil rotation and movement device; and a coil heat retention cover that covers a coil setting portion that is rewound by the unwinding device. .