JPH11131125A - Slag ball charging device of converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely, rapidly and stably charge the slag ball into a converter by providing a locking body on a tip of a guide frame so as to be freely opened and closed, mounting a slag ball charging chute on the guide frame so as to be freely extended and contracted to direct the guide frame to the converter. SOLUTION: A guide frame 1 is provided so as to be freely vertically and pivotably movable around a supporting point 3, and a slag ball locking body 5 is provided on a tip of the guide frame 1. A slag ball charging chute 6 is provided on the guide frame 1 so as to be freely extended and contracted. A driving mechanism 4 is operated to turn and lower the tip of the guide frame 1 from the waiting position A to the slag ball charging position B, and a slag ball 8 is locked and charged to the slag ball locking body 5. Then, the driving mechanism 4 is operated to direct the tip of the guide frame 1 to the position C of a converter 7. Then, the slag ball charging chute 6 is extended to be directed in the converter 7, and the locked slag ball 8 is delivered to the slag ball charging chute 6 and charged into the converter 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slag ball charging device for a converter.

[0002]

2. Description of the Related Art A slag ball lifted by a crane hook via a suspension ring passes through a slag layer in a converter, descends to a molten steel surface (a molten metal surface), and floats the slag ball on the molten steel surface. Japanese Patent Application Laid-Open No. 1-263215 discloses that a slag ball is introduced into a converter by lowering and loosening a hanging ring in contact with molten steel to melt it.

[0003]

When such slag balls are charged into a converter, the molten steel surface below the slag layer, which is the position where the slag balls reach, cannot be visually observed. Therefore,
In order to estimate the relationship between the molten metal level and tapping hole from the furnace tilt angle and the amount of molten steel, additional equipment for automatic control, equipment to grasp the amount of molten steel that is tapped and the amount of molten steel in the furnace are required. Become. In addition, the slag ball is separated from the hook by lowering the hook slightly from the position where the slag ball is positioned on the molten steel, loosening the suspension ring and contacting the molten steel and melting it. Also, there is a problem that the hook is brought into contact with molten steel to be damaged. The device of the present invention has been made to advantageously solve such problems.
It is an object of the present invention to provide a converter slag ball charging device capable of accurately and quickly charging slag balls into a converter.

[0004]

A feature of the present invention is that a slag ball stopper is provided at the tip of a vertically movable guide frame so as to be openable and closable, and a slag ball input chute is extended and contracted on the guide frame. It is a slag ball charging device for a converter, which is mounted.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the operation of a vertically movable guide frame is, for example, to stop at a position where a slag ball is loaded into the guide frame. Also, after the slag ball is loaded, the guide frame puts the slag ball into the converter,
Stop moving to a position pointing into the converter. Further, after the slag ball is put into the converter, it moves to the standby position. Various mechanisms can be employed as an operation mechanism of such a guide frame, for example, such that the guide frame is inclined downward and held toward the converter and the entire guide frame can be freely moved up and down in this state. In front of the converter, the operation is performed in a limited space.
For this reason, for example, the upper part of the longitudinal center of the guide frame is rotatably suspended, and the tip of the guide frame can be freely moved up and down by a driving mechanism such as a fluid pressure cylinder adjacent to the suspended portion. . It is preferable to be configured so as to be able to pivot up and down.

A locking member is provided at the end of such a guide frame so as to be openable and closable, and a slag ball throwing chute is attached to this guide frame so as to be stretchable. For example, a slag ball throwing chute can be engaged with a guide frame via wheels or the like so that the slag ball throwing chute can be attached and retracted. When the slag balls are put into the converter, the guide frame is moved to the position as described above, and after the slag balls are loaded from the carrier trolley or the like into the stopper at the tip of the guide frame, the guide frame is moved. Then, the slag ball input chute, which is telescopically attached to the guide frame, is advanced and extended to be directed to the inside of the converter. Thereafter, by releasing the locking member, the slag ball is discharged from the leading end of the guide frame directed into the converter to the slag ball input chute, and is input into the converter from the slag ball input chute. After throwing slag ball,
The slag ball throwing chute is retracted, contracted and stored in the guide frame, and then the leading end of the guide frame is moved upward to stop at the standby position.

[0007] As described above, as the openable and closable slag ball locking member provided at the distal end of the guide frame, for example, a plate-shaped locking plate is provided at the distal end of the guide frame by a slide mechanism so as to be freely opened and closed. In addition, an appropriate mechanism such as providing a slag ball locking body vertically openable and closable on the slag ball input road surface can be adopted.

[0008] When the slag ball is put into the converter,
Point the guide frame to the converter, and then extend the slag ball input chute to position it in the converter and release the locking body at the same time. Can be charged, the timing of charging the slag balls becomes accurate, and slag discharge in the converter can be prevented more reliably. As such an opening / closing mechanism of the locking body, for example, a slag ball locking body is rotatably provided, and a projection is provided to extend the slag ball charging chute so that the slag ball charging chute is provided at the rear end thereof. The slag ball locking body is rotated and released, and the slag ball is discharged from the end of the guide frame to the slag ball input chute, and the discharged slag ball is rolled through the slag ball input chute. The slag ball throwing chute is thrown back into the furnace, retracted and stored in the guide frame. When the projection at the rear end of the slag ball throwing chute and the projection of the slag ball locking body are separated, they automatically rotate in reverse. By adopting a mechanism that closes the slag ball, the slag ball can be quickly and accurately charged into the converter.

[0009]

Next, an embodiment of the present invention will be described. In FIG. 1, a guide frame 1 is provided on a frame body 2 so as to be vertically pivotable about a fulcrum 3 on an upper portion of a longitudinal center portion of the guide frame 1, and a driving mechanism (a fluid pressure cylinder or the like) 4 Is provided between the frame bodies 2, and a slag ball input chute 6 is provided on the guide frame 1 provided with a slag ball locking body 5 at the end of the guide frame 1 so as to be extendable and contractible. When the slag ball is thrown into the converter 7, the tip of the guide frame 1 at the standby position A is moved around the fulcrum 3 by the operation of the drive mechanism 4.
After being swung down to the slag ball loading position B, the slag ball 8 is locked and loaded into the slag ball locking body 5 provided at the end of the guide frame 1. Thereafter, the drive mechanism 4 is operated to bring the tip of the guide frame 1 to the directing position C toward the converter 7, and then the slag ball input chute 6 housed in the guide frame 1 is extended to point to the converter 7. At the same time, as shown in FIGS. 2 and 3, a projection 9 provided at the rear end of the slag ball input chute 6 is provided at the tip of the guide frame 1 so as to be rotatable around the pin 10 in the input direction of the slag ball 8. The slag ball 8 which is locked to the tip of the guide frame 1 is released by colliding with the projection 9a of the slag ball locking body 5 and rotating in the direction of the arrow around the pin 10 to release the slag ball locking body 5. It is paid out to the slag ball charging chute 6 and is charged from the slag ball charging chute 6 to the converter 7. Slag ball 8 like this
When the feeding of the slag ball is completed, the slag ball feeding chute 6 is retracted and housed in the guide frame, and is moved to and held at the standby position A around the fulcrum 3 by the operation of the drive mechanism 4 as shown in FIG.

Next, an example of a mechanism for telescopically mounting the slag ball throwing chute on the guide frame as described above will be described. 4 and 5, a frame 11 is provided at the rear end of the slag ball input chute 6 and a roller 12 is mounted on the frame 11.
And the wheels 13 are arranged, and the rollers 12 are brought into contact with the ribs 14 of the guide frame 1 and the wheels 13 are brought into contact with the flanges 15 as shown in FIG. Installing.

An example of the slag ball throwing chute drive mechanism mounted in such a manner as to be freely stretchable will be described. In FIG. 7, a rope 16
And the other end of the roller 17 at the end of the guide frame 1.
A drive mechanism (not shown) is wound around the roller 17 a at the rear end of the guide frame 1, and the slag ball input chute 6 in the extended state is retracted by the operation of the drive mechanism and stored in the guide frame 1. When the slag ball input chute 6 is extended, the drive mechanism is not braked and is extended (advanced) from the inclined guide frame 1 to be directed to the inside of the converter.

[0012]

According to the apparatus of the present invention, slag balls can be reliably and stably charged into a converter.
Also, since the slag can be charged quickly, the slag ball charging timing is accurate, slag discharge in the converter can be prevented, and slag mixing into the molten steel can be significantly reduced. Therefore, excellent effects such as improvement in the quality of steel products can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing a slag ball input state of the apparatus of the present invention.

FIG. 2 is a plan view of a slag ball stopper.

FIG. 3 is a side view of the slag ball stopper.

FIG. 4 is a plan view showing a mechanism for engaging a slag ball throwing chute with a guide frame.

FIG. 5 is a side view showing a mechanism for engaging a slag ball throwing chute with a guide frame.

FIG. 6 is a front view showing a state in which a slag ball throwing chute is engaged with a guide frame.

FIG. 7 is a side view showing a telescopic drive mechanism of a slag ball throwing chute.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide frame 5 Slag ball locking body 6 Slag ball charging chute 9 Projection at the rear end of slag ball charging chute 9a Projection of slag ball locking body

Claims (3)

[Claims] 1. A slag ball input device for a converter, wherein a slag ball locking member is provided at the tip of a vertically movable guide frame so as to be openable and closable, and a slag ball input chute is attached to the guide frame so as to be extendable and retractable. . 2. A slag ball catching member, which is rotatably provided, collides with a projecting member at the rear end of the slag ball throwing chute when the slag ball throwing chute is extended, thereby rotating the slag ball catching member. The slag ball charging device for a converter according to claim 1, wherein the slag ball charging device is configured to be opened. 3. The slag ball input device for a converter according to claim 1, wherein the tip of the guide frame is vertically pivotable.