JPH087965Y2 - Descaling device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing slag adhering to the inner surface of a tundish used as a molten steel pool before being poured into a mold during continuous casting.

[0002]

2. Description of the Related Art A tundish, which is a pool of molten steel in order to pour water into a water-cooled mold during continuous casting, removes the molten slag adhering to the bottom of it every time one charging operation is performed. ing. This slag has a thickness of about 50 mm and interferes with the next work, so it must be removed. Conventionally, in order to remove the molten slag, an operator directly removes the molten slag by using an oxygen lance toward the hot tundish or by cooling and then using a grinder.

[0003]

However, with such a conventional removing means, the work takes time and labor,
In addition to being inefficient, it is not preferable because of high heat in the working environment, and improvement thereof has been strongly demanded. The present invention replaces the above-mentioned conventional removing means and mechanically processes all the operations, and an object thereof is to achieve labor saving and improve work efficiency.

[0004]

In order to achieve this object, a molten slag removing apparatus according to the present invention has a rail laid along the longitudinal direction of a tundish, and a plurality of trucks are arranged on the rail. A horizontally rotatable support base is mounted on each carriage, and a square pipe that can be lowered vertically is pivotally supported on the support base, and an oxygen pipe having an oxygen nozzle at the tip is front and back in the square pipe. It fits freely and further, the oxygen pie
Nozzle shock absorbing spring between the nozzle and the oxygen nozzle.
It is characterized in that a pipe and a turning device for retracting the oxygen nozzle are provided .

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to FIGS. A typical example of a tundish which is the subject of the present invention is shown in FIG. The tundish 3 is used when the molten metal is received from the ladle, poured into the continuous casting mold through the nozzle hole 3a at the bottom, and the continuous casting is performed. As shown in FIG. 5B, the slag 2 adheres to the brick of the inner wall of the tundish after one charge with a thickness of about 50 mm, but this slag needs to be removed by the next charge.

The apparatus of the present invention for removing the molten slag 2 is constructed as shown in FIGS. That is, the base 4 is installed at a position to be installed on the tundish 2, and the rail 5 is laid on the base 4 along the longitudinal direction of the tundish 2,
Two (or more) traveling carriages 8a and 8b are mounted on the rail 5. The traveling vehicles 8a and 8b are provided with a drive device 6 (servo motor, pulse motor, etc.) and wheels 7.
It is possible to move on the rail as appropriate. Since the traveling vehicles 8a and 8b have the same structure, only one of them will be described below for convenience.

As shown in FIG. 2, a support base 10 is mounted at a substantially central portion of the traveling carriage 8a through a rotary plate 9 which is rotatable in a horizontal direction, and the support base 10 has a shaft 10a for supporting a square pipe. 11 is attached. The lower part of the support base 10 is connected to a cylinder motor (motor is a servomotor) 12 installed on the carriage 8, and the operation of the support base 10,
That is, the square pipe 11 turns horizontally over a certain range. Furthermore, the support base 10 and the square pipe 11 are connected by another cylinder motor (the motor is a servomotor) 13, and the square pipe 11 can be swung in the vertical direction by the expansion and contraction operation of the cylinder rod. .

An oxygen pipe 15 having a rack partially on the side surface is slidably fitted in the square pipe 11, and a pinion rotated by a motor 14 (servo motor, pulse motor, etc.) meshes with the rack. , The oxygen pipe 15 is moved forward and backward. An oxygen passage 16 penetrates in the central portion of the oxygen pipe 15 in the lengthwise direction, and a cooling air passage 16a is arranged around the oxygen passage 16. The oxygen passage 16 passes through a flexible tube 17 and a rotary actuator 18
Thus, it passes through the pipe material 19 which can be rotated to the left and right, and further passes through the spring pipe 20 which is expandable and contractible in the length direction, and reaches the oxygen nozzle 21 fitted in the pipe 20.

Behind the base 4, there is provided a driver's cab 22 of the removing device of the present invention. The driver's cab 22 displays images sent from a control panel 23 and a plurality of cameras 26 for photographing the removal condition. Two or more television monitors 24 and a control panel 25 are arranged. The various driving devices are not limited to the illustrated examples, and can be replaced with other known mechanical means.

When the molten slag is removed by this apparatus, the tundish 3 which has finished the pouring work is rotated 90 degrees by the pedestal 1 so that its opening side faces the base 4, and then it is incorporated in the control panel 23 in advance. Operation panel 2 based on the program
Work is started by pressing the 5 button, for example,
As shown by the arrow in (a) of FIG.
Operate the oxygen nozzle on 8b to remove sludge,
When the work of the X'part is completed, the work of the Y and Y'parts is continued. FIG. 4B shows the oxygen nozzle 21.
Shows the flow of oxygen by the oxygen nozzle, and (c) shows the oxygen nozzle 21.
The tip and a part of the tundish 3 are shown, and the distance Z is preferably about 100 to 200 mm.

In the present invention, since the removal work is performed immediately after the molten metal has flowed from the tundish, the molten slag is kept at a high temperature, and if oxygen is ejected in this state, the oxidation reaction is easily promoted and the ejection energy is increased. The slag can be blown off easily. Further, even if the oxygen nozzle is loaded and the taper portion (side wall) or the bottom portion of the tundish is collided, the spring pipe 16 serves as a buffer portion and does not damage the device. At the end of the work, the rotary actuator 18 may be operated to rotate the oxygen nozzle 21 by 90 degrees in the rail direction and wait until the next work comes. During operation, the cab 22
The worker can monitor the image displayed by the camera on the television monitor 24.

[0012]

As described above, according to the present invention, it is possible to mechanically perform everything in place of the conventional manual work, so that improvement in work efficiency and molten slag removal efficiency can be expected, and it is practical. This effect is extremely large.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the device of the present invention.

FIG. 2 is an enlarged view of a main part of the apparatus shown in FIG.

FIG. 3 is a side view of FIG.

4 (a), (b) and (c) are views sequentially showing an operation of a molten slag removal work.

5A and 5B are a plan view and a cross-sectional view showing a typical example of a tundish to which the present invention is applied.

[Explanation of symbols]

1 Cradle 2 Slag 3 Tundish 4 Base 5 Rails 6, 12, 13,
14 Motor 7 Wheel 8 Cart 9 Rotating Plate 10 Supporting Stand 11 Square Pipe 15 Oxygen Pipe 16 Oxygen Passage 17 Flexible Tube 18 Rotary Actuator 19 Pipe Material 20 Spring Pipe 21 Oxygen Nozzle

Claims (1)

[Scope of utility model registration request] 1. An apparatus for removing molten slag adhering to a tundish for continuous casting, in which a rail is laid along the longitudinal direction of the tundish, a plurality of carriages are arranged on the rail, and horizontal on each carriage. A support base that is rotatable in any direction is mounted, and a square pipe that can be vertically lowered is pivotally supported on the support base, and an oxygen nozzle is provided at the tip in the square pipe.
An oxygen pipe is fitted so as to be able to move forward and backward, and a spring pipe for buffering a nozzle collision and a turning device for retracting the oxygen nozzle are provided between the oxygen pipe and the oxygen nozzle. apparatus.