JPS5819387B2 - Slab welding slag removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slab fusing slag removing device, and more particularly to a slab fusing slag removing device for removing, with a solvent, slag generated when continuously cast slabs produced by a continuous casting machine are melted.

Generally, a continuous slab extracted from a continuous casting machine is cut by a gas cutting machine, cooled, and subjected to processes such as surface treatment before being inserted into a heating furnace for a rolling mill.

However, with recent continuous casting technology, it has become possible to produce high-quality slabs that do not require any surface care, making it possible to carry out so-called direct rolling, in which the slabs are transported to a rolling mill in a red-hot state after being fused. It becomes.

However, the slab cut by the fusing machine has slag containing molten metal particles attached to the lower surface of the cut piece.

A slab to which such slag is attached has negative effects such as bite defects and a reduction in rolling yield during rolling.

Therefore, the slab to which such slag is attached is cooled after being fused and turned over in a slab refining equipment, and the slag is removed by a manual operation such as a band scarf.

This slag removal operation not only requires double handling of the slab, but also becomes a major impediment to the above-mentioned direct rolling of the slab.

Therefore, the following slag removal method has been proposed to enable smooth direct rolling of slabs.

That is, a conventionally proposed slag removal method is a method in which a device for washing away slag with an oxygen jet is disposed in a line.

However, in such a conventional method, there is a problem that it takes time to align the part of the slab to be solvent and the solvent nozzle, which reduces the production capacity of the continuous casting machine.

The present invention has been made in view of the above conventional problems, and an object of the present invention is to provide a slab fusing slag removal device that has high slag removal efficiency and does not reduce the production capacity of a continuous casting machine. .

In order to achieve the above object, the present invention provides a slab fusing slag removal device that removes slag generated during melt cutting of slabs with a solvent, which includes a stand installed over a slab conveying section, and a slab conveying section. A solvent trolley installed on a stand so that it can reciprocate in the right angle direction, a slider installed inside the solvent truck so as to be movable in the direction of conveying the slab, and a solvent arranged on the slider so as to be able to face the part of the slab to be solvent. It has a nozzle and a touch roll which is provided on the slider so as to be able to come into contact with the end face of the slab and maintains the relative position of the solvent nozzle in the slab conveying direction with respect to the portion to be solvent of the slab in a constant state.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory diagram showing a continuous casting facility equipped with a slab melt cutting slag removing device according to the present invention.

That is, the slab 2 extracted from the danditshu 1 is
After being pulled out by the pinch rolls 3, it is melt-cut to a predetermined length on the torch table 4 by a primary torch cutter 5 that moves between a predetermined torch travel in synchronization with the drawing speed of the slab 2.

The melted slab 2 passes through a torch rear table 6 and is weighed at a scaler table 7.

Further, a slag removing device 10 is disposed between the scaler table 7 and a conveying table 8 disposed subsequent thereto, and this slag removing device 10 removes the slag generated on the lower surface of the slab 2 during fusing in the previous process. The solvent is removed from the slag.

2 to 4 are explanatory diagrams showing the structure of this slag removing device 10. FIG.

In this slag removing device 10, a conveying roller 7A on the tip side of the scaler table 7 as a slab conveying section,
A slag removing device is provided at the intermediate portion between the rear end side of the transport table 8 and the transport roller 8A, and on both sides of the transport section at this slag removal position, a light emitter 9A and a light receiver are installed so that the beam crosses the transport area of the slab 2. 9B is placed.

When the beam from the projector 9A to the receiver 9B is crossed by the tip of the slab 2, the driving device 7A of the scaler table 7 is stopped and the slab 2 is stopped. When the rear end of the slab 2 crosses the beam, the first driving device 8B of the conveyance table 8 is stopped and the slab 2 is stopped.

In addition, each drive device 7B. 8B is the slag removing device 10
After the solvent-targeted portions of the slabs 2 in the stationary state are solventized by the solvent operation to be described later, driving is started again to transport the slabs 2 to the subsequent process side.

Above the slag removal position described above, a gate-shaped water-cooling pedestal 12 is provided with a water-cooling pipe 11 that is supplied with water from one side and drained from the other so as to be protected from the radiant heat of the slab 2.

A pair of parallel rails 13 are provided on the upper surface of this water-cooled frame 12, and a solvent truck 14 is mounted on these rails 13 with wheels 15.
The stoppers 12A and 12B are installed so as to be able to reciprocate in the direction perpendicular to the conveyance of the slab.

An electric motor 16 is mounted on the solvent truck 14, and a sprocket 17 fixed to the output shaft of the electric motor 16 and a wheel 15
A chain 20 is wound around a sprocket 19 that is fixed to an axle 18.

That is, by reversing the electric motor 16, the solvent truck 14
As mentioned above, the reciprocating motion is made in the direction perpendicular to the conveyance of the slab.

Note that the moving speed of the solvent cart 14 can be selected steplessly by changing the frequency of the power supply applied to the electric motor 16, and by selecting this moving speed, the solvent depth can be adjusted.

Inside the solvent truck 14, a pair of parallel rails 21 are installed extending in the direction of conveying the slab, and a slider 22 is installed on the rails 21 via wheels 23 so as to be movable in the direction of conveying the slab. .

An air cylinder 24 is supported by a trunnion on the upper part of the slider 22, and a piston rond tip of the air cylinder 24 is connected to one inner wall of the solvent truck 14.

That is, the slider 22 can move forward or backward in the slab conveying direction by operating the air cylinder 24.

The lower part of the slider 22 is provided with an arm 25 that hangs down to a level below the lower surface of the slab 2.
A first solvent nozzle 26 and a second solvent nozzle 27 are provided on both sides of the lower end in the slab conveyance direction, respectively.

The first solvent nozzle 26 faces the lower surface of the tip of the slab 2 that is parked on the scaler table 7, and is capable of applying a solvent to the tip-side portion of the slab 2 to be solvent.

Further, the second solvent nozzle 27 is opposed to the lower surface of the rear end of the slab 2, so that the solvent can be applied to the portion to be solvent on the rear end side of the slab 2.

On both sides of the arm 25 hanging down from the slider 22 in the slab conveying direction corresponding to the slab passing level, there is a tip surface 2A of the slab 2 parked on the scaler table 7.
A first touch roll 28 that can come into contact with the cast slab 2 and a second touch roll 29 that can come into contact with the rear end surface 2B of the slab 2 that is parked on the conveyance table 8 are provided.

These first tutti rolls 28 and second tutti rolls 29 cover the front end surface 2A and rear end surface 2A of the slab 2, respectively.
By maintaining the state in which the first solvent nozzle 26 contacts B, the relative position of the first solvent nozzle 26 with the slag 30A serving as the solvent-targeted portion on the tip side of the slab can be maintained in a constant state, and the second solvent nozzle The relative position of the slab 27 in the slab conveying direction with respect to the slab 30B serving as the solvent-receiving portion on the rear end side of the slab can be maintained in a constant state.

A cable carrier 31 is connected to the solvent truck 14 and the water-cooled frame 12 to supply power to the electric motor 16 and to the air cylinder 2.
4, the first solvent vent 26 and the second solvent vent 27
A solvent gas such as oxygen or propane is supplied to the cable carrier 31 via wiring and piping within the cable carrier 31.

In addition, from the upper level of the conveying roller 7 A t B A to the lower pit 3 which spans both sides of the slag removal position,
A pair of chutes 35 are arranged facing each other in 4, and
A first solvent vent 2 is provided at the upper position of the inner surface of each chute 35.
6 and the second solvent crater 27 during the solvent work,
A water pipe 36 is installed to use spray water to peel off the deposits adhering to the inner surface of the chute 35 and cause them to fall.

Next, the operation of the above embodiment will be explained.

When the slab 2 cut by the primary torch cutter 5 is conveyed on the scaler table 7 and the light emitter 9A and receiver 9B detect that the leading end has reached the slag removal position, the driving device 7B The scaler table 7 stops, and the slab 2 remains on the scaler table 7.

Until this state is reached, the solvent cart 14, which was waiting at the left end position in FIG. 3, moves rightward in FIG.
The solvent is removed from the slag 30A on the tip side of the slab by the solvent gas at a predetermined pressure ejected from the solvent nozzle 26.

During this solvent work, the slider 22 is urged to move rightward in FIG. 4 by the operation of the air cylinder 24, and as shown in FIG. The state of contact with the surface 2A is maintained.

Due to the action of the slider 22, the first solvent nozzle 26 is held in a predetermined position relative to the slag 30A in the slab conveying direction by contacting the tip surface 2A of the first touch roll 28, so that the tip surface 2A is Even when the slag 30A is not cut linearly in the direction perpendicular to the conveyance of the slab but cut in a meandering manner, the solvent is removed in an appropriate state from the slag 30A.

Here, the scattered slag that is scattered due to the ejection of the solvent gas from the first solvent nozzle 26 is captured by the chute 35, peeled off by the spray nozzle of the hydroxyl pipe 36, and transferred into the pit 34.

In this way, when the solvent removal from the slag 30A is completed, the electric motor 16 of the solvent truck 14 is stopped and the solvent truck 14 is stopped at the right end position in FIG. 3.

At the same time as the solvent cart 14 stops at the right end position, the drive device 7
B is driven again to operate the scaler table 7 and transport the slab 2 to the transport table 8 side.

When the light emitter 9A and receiver 9B detect that the rear end of the slab 2 has reached the slag removal position, the drive device 8B of the conveyance table 8 is activated, the conveyance table 8 is stopped, and the rear end of the slab 2 is detected. The end face 2B remains at the slag removal position.

From this state, the solvent cart 14 is moved from the left end position in FIG. 3 toward the right end by the reverse operation of the electric motor 16, and the slag 30B on the rear end side of the slab 2 is removed by the solvent by the second solvent nozzle 27.

In this case, the slider 22 is urged to be movable to the left in FIG. 4 by the operation of the air cylinder 24, and
As shown in Figure B, the second touch roll 22 is
B, the second solvent nozzle 27 is held in a predetermined relative positional relationship with respect to the slag 30B, and the solvent is removed from the slag 30B in an appropriate state.

When the solvent is removed from the slag 30B on the rear end side of the slab 2 in this way, the slab 2 is further transported to the subsequent process by the drive of the driving device 8B, and the solvent cart 14 is moved to the left end position in FIG. , and waits for a new slab to enter the slag removal position.

According to the above embodiment, the first solvent nozzle 26 and the second solvent nozzle 27 are connected to the slag 3 by the action of the slider 22, the first tutti roll 28, and the second tutti roll 29, respectively.
Since the solvent work is performed while maintaining a predetermined relative positional relationship with 0A and 30B, the positioning work of the solvent nozzle with respect to the part to be solvent becomes quick and reliable.

In addition, since the arm 25 of the slider 22 is provided with a first solvent port 26 for the solvent on the front end of the slab and a second solvent port 27 for the solvent on the rear end of the slab, the solvent can be removed. Work efficiency can be improved.

Furthermore, since a water pipe equipped with a spray nozzle 36 is provided at the top of the chute 35, it is possible to transfer the scattered slag generated when removing the slag solvent to the pit 34 side without depositing it on the chute 35. .

As described above, the present invention provides a slab fusing slag removal device that removes slag generated during slab melting using a solvent, and the pedestal installed above the slab conveying section is capable of reciprocating in the direction perpendicular to the slab conveyance. a solvent trolley installed on the frame; a slider disposed within the solvent trolley so as to be movable in the slab conveying direction;
A solvent nozzle provided on a slider so as to be able to face the part to be solvent of the slab, and a solvent nozzle provided on the slider so as to be able to come into contact with the end face of the slab, so that the relative position in the slab transport direction of the solvent nozzle with respect to the part to be solvent of the slab is maintained in a constant state. Since it has a touch roll for holding, it has the effect that the slag removal efficiency can be improved.

[Brief explanation of drawings]

Fig. 1 is a layout diagram showing a continuous casting facility equipped with a slab fusing slag removing device according to the present invention, and Fig. 2 is a plan view showing an embodiment of a slab fusing cutting slag removing device according to the present invention. Third
The figure is a front view of the same, and Figure 4 is a side view showing an enlarged view of the main parts.
Figure 5A is a side view showing the slag solvent situation on the tip side of the slab;
FIG. 5B is a side view showing the state of the slag solvent at the rear end of the slab. 2... Slab, 7... Scaler table, 8... Transfer table, 12... Water cooling stand, 14... Solvent trolley. , 22...
Slider, 26...First solvent crater, 27...
...Second solvent nozzle, 28...First Tatsutirol, 29...Second Tatsutirol, 30A. 30B...Slag.

Claims (1)

[Claims] 1. In a slab fusing slag removal device that removes slag generated when melting slabs with a solvent, there is a pedestal installed over the upper part of the slab conveying section, and a pedestal installed on the pedestal so as to be able to reciprocate in a direction perpendicular to the slab conveyance. a solvent truck, a slider disposed inside the solvent truck so as to be able to reciprocate in the slab conveyance direction, and an arm extending from the slider to the lower surface of the slab and extending in one direction in the slab conveyance direction. First and second solvent nozzles provided at positions that can face the respective parts to be solvent at the tip and rear ends of the W, and positions that can come into contact with the respective end surfaces of the tip and rear ends of the billet at the front and rear of the slab conveying direction of the arm. A casting machine characterized by comprising first and second touch rolls that are attached and maintain constant relative positions of the first and second solvent nozzles in the slab conveying direction with respect to each solvent target part at the front and rear ends of the slab. Single welding slag removal device.