JPS58145342A - Roll device for continuous casting installation - Google Patents

Abstract

PURPOSE:To provide a roll device which decreases the contact area between an ingot and rolls and decreases the quantity of removed heat by disposing small diameter rolls, which are formed with many grooved recesses and are fixed with heat insulating materials, and back up rolls in a slow cooling zone of a continuous casting installation. CONSTITUTION:Many grooved recesses 13 are formed on the outside circumferential surfaces of small diameter rolls 11 mounted to a frame 12, and heat insulating members 14 consisting of thin walled chromium steel plates, etc. are fixed in the bottoms of the recesses 13. Backup rolls 15 are mounted in the frame 12 so as to contact with the rolls 11 to prevent the deflection of the rolls 11 generated by the reduced diameters. If such roll device is disposed in the slow cooling zone of the continuous casting installation, the contact area between the rolls 11 and an ingot 9 is decreased and since the heat from the ingot 9 is reflected by the effect of the members 14, the quantity of the heat removed from the ingot 9 is decreased considerably. The high temp. ingot is thus produced easily.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous casting roll device.

An outline of a conventional continuous casting facility using a mold with both ends open will be explained with reference to FIG.

Molten steel injected into a tundish 2 from a ladle 1 is injected into a mold 4 via a nozzle 3. The molten steel in the mold 4 is
The mold 4 is cooled by a guide roll 5 and a secondary cooling zone 6 provided next to the mold 4, and is then pulled out. The unsolidified slab, which has been cooled and whose solidified shell has gradually become thicker, is straightened horizontally by a straightening roll 7. After that, the slab 9, which has been completely solidified in an annealing zone 8, is cut into a predetermined shape by a cutting machine 10. It is cut to length and sent to the primary process.

In recent years, as part of energy-saving measures, slabs cast by continuous casting equipment are transported to a rolling process and rolled without being reheated. This is why the so-called hot direct rolling is performed with nine legs.

Continuous casting equipment has been proposed in which a heat insulating device is installed between adjacent rolls provided in an annealing zone to prevent the temperature of the slab from dropping and obtain a high-temperature slab. -10442 publication.

There are publications such as Publication of Utility Model IJd56-10443.

Installing the above heat insulation device in the slow cooling zone will certainly prevent the temperature of the slab from dropping, but one of the major causes of the drop in temperature of the slab is the large number of supports installed in the slow cooling zone. There is a problem of heat removal due to contact between the rolls or pinch rolls and the slab, but the above heat insulation device does not take this point into consideration at all.

This invention was made in order to solve the problem of the temperature drop of the slab due to the contact between the roll installed in the slow cooling zone and the slab from the above-mentioned viewpoint. It is characterized by consisting of a small diameter roll in which a large number of recesses are formed and provided with a heat insulating material, and a backup roll provided in contact with the roll.

The present invention will be explained by way of embodiments with reference to the drawings.

FIG. 2 is a partial vertical sectional view of an embodiment of the invention, and FIG. 3 is a sectional view taken along the line A--A in FIG.

In FIGS. 2 and 3, 11 is a roll (pinch roll or support roll) attached to the frame 12. 1 on the axial outer peripheral surface of the roll 11
A large number of groove-shaped recesses 13 are formed at intervals,
A heat insulating member 14 made of a thin chrome steel plate or the like having a function of reflecting heat from the slab 9 is fixed to the bottom of the recess 13.

The diameter of the roll 11 is smaller than that of a conventional roll. Therefore, the contact area between the roll 11 and the slab 9 is greatly reduced compared to the conventional roll due to the recess 13 formed on the outer circumferential surface and the small diameter.

15 is a backup roll attached to the frame 12 parallel to the roll 11 so as to be in contact with the roll 11. This backup roll 15 has the function of preventing deflection of the roll 11 caused by the reduction in diameter.

Since the roll device of the present invention is configured as described above, when this roll device is installed in the slow cooling zone of continuous casting equipment, the contact area between the roll 11 and the slab 9 is smaller than that of the conventional roll. Since the heat from the slab 9 is reflected by the heat insulating member 14 attached to the recess 13, the amount of heat removed from the slab 9 is greatly reduced.

If the above-mentioned roll device is used in combination with the heat insulating device 16 disclosed in Japanese Patent Application No. 57-896, for example, a drop in temperature of the slab 9 can be more effectively prevented. The above heat insulation device 16
The state in which the roll device of this invention is installed in combination with
As shown in the figure.

The structure of the heat insulating device 16 will be explained with reference to FIG. 6.

The heat insulating device 16 includes a heat insulating plate 19 made of a heat insulating material 17 made of glass fiber or the like covered with an outer plate 18, a heat reflecting plate 20 in a corrugated shape attached to one side of the heat insulating plate 19, It consists of a cooling water pipe 21 that passes through the plate 19 and is attached to the heat reflecting plate 20 so that its tip is open.

A portion of the heat from the slab 9 is reflected by the heat reflecting plate 20, and is also insulated by the air layer 22 formed between the heat reflecting plate 20 and the heat insulating plate 19 and the heat insulating plate 19f. , a drop in temperature of the slab 9 is prevented.

The cooling water pipe 21 is for discharging cooling water to the slab 9 in order to control the cooling capacity of the slab in the slow cooling zone.

The recesses 13 formed on the outer peripheral surface of the roll 11 are as follows.

In addition to the above-mentioned groove shape, it may also have a circular shape as shown in FIG.

As explained above [7], according to the present invention, since the contact area between the slab and the roll is reduced, the amount of heat removed by contact with the roll is greatly reduced, and moreover, as the diameter of the roll is reduced, Deflection of the rolling roll can be completely prevented, and extremely useful effects such as easy production of high-temperature slabs when hot direct rolling is carried out are brought about.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of continuous casting equipment, FIG. 2 is a partial vertical sectional view of an embodiment of the present invention, and FIG. 3 is a
A#M sectional view, Figure 4 is a front view of the case where the roll device and heat insulation device of this invention are installed together, and Figure 5 is a partial side view of another roll. Figure 6 is a partially cutaway perspective view of the heat insulating device.In the drawing, 10. Ladle 2...Tundish 3...Nozzle 4°...Mold 5...Guide roll 6...Secondary cooling Band 7... Straightening roll 8... Annealing zone 9... Slab 1
0... Cutting machine 11... Roll 12...
・Frame 13...Concavity 14...Insulating member 15...Backup row 16...Insulating device 17...Insulating material 18...Outer plate 19...Insulating board 20...Heat reflection Plate 21...for cooling water piping 2...air layer Applicant Nippon Koukan Co., Ltd. agent Keitabe Tsutsumi (and one other person) Figure 2, Figure 3R, Figure 5

Claims (1)

[Claims] A roll installed in an annealing zone of continuous casting equipment, comprising a small-diameter roll having a number of depressions on its outer circumferential surface with a heat insulating material attached to the bottom, and a backup provided in contact with the roll. A roll device for continuous casting equipment, comprising a roll.