JP3493877B2 - Metal removal equipment in metal smelting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground attached to the lower surface of a self-propelled carriage or a furnace lid attached to the self-propelled carriage that travels back and forth between an operating position and a standby position provided in a metal refining facility. The present invention relates to a gold removing device.

[0002]

2. Description of the Related Art Generally, in order to remove the metal adhered to the lower surface of a self-propelled carriage that travels back and forth between an operating position and a standby position of a metal refining equipment, or the equipment attached to the self-propelled carriage,
For example, as disclosed in Japanese Utility Model Laid-Open No. 63-123658, a method of melting down the metal by using combustion gas generated by combustion of fuel gas and oxygen gas supplied from a burner,
Alternatively, the contact blade plate is fixedly placed on the floor where the edge of the self-propelled carriage is cut off on the traveling route of the self-propelled carriage, and the adhered metal is brought into contact with the contact blade plate by using the force of the traveling of the self-propelled carriage. There is known a method of removing by doing so.

[0003]

However, in the method of melting the metal by burning gas using a burner, there is a problem that the work is inferior because direct intervention by workers is required. In addition, in the method of hitting the metal on the blade plate placed on the traveling path of the self-propelled cart, it has a removing effect when the metal is hot and soft, but when the metal is cooled and hardened There is a problem that the board is broken or the drive motor that runs the self-propelled truck trips.

The present invention solves the above-mentioned problems of the prior art, has good workability, easily removes hot metal, and prevents troubles such as breakage of the blade even when it comes into contact with cold metal. It is an object of the present invention to provide a metal removal device for metal refining equipment that can be used.

[0005]

According to the present invention, the hot metal can be firmly contacted to easily remove the metal.
This has been achieved as a result of studying a practical device capable of preventing damage due to escape of the blade when the cold metal comes into contact.

In order to achieve the above-mentioned object, the present invention according to claim 1 is provided on a lower surface of a self-propelled carriage that travels back and forth between an operating position and a standby position of the metal refining equipment or an equipment attached to the self-propelled carriage. A device for removing adhered metal, comprising a pedestal disposed midway between the operating position and the standby position, a tilting frame rotatably supported on the pedestal via a hinge joint, and a tilting frame of the tilting frame. A blade plate installed upright so as to have the strength to scrape off the red-hot metal attached to the lower surface of the instrument at one end on the operating position side,
A counterweight attached to the other end of the tilting frame on the standby position side so as to hold the contact blade plate upright, and the gravity of the counterweight when the self-propelled carriage travels from the operating position to the standby position. While holding the backing blade plate upright by using the backing blade plate to remove the red-hot metal adhered to the lower surface, the traveling carriage remains on the lower surface when traveling from the standby position to the operating position. When the ingot in the cooled state passes through the position of the contact blade plate, the tilting frame is rotated around the hinge joint by the traveling force of the self-propelled carriage against the counterweight, and the tilted frame is rotated in the cooled state. It is a device for removing metal in a metal refining facility, which is configured to release a force of the metal colliding with a contact blade plate.

The present invention according to claim 2 is the apparatus for removing metal in a metal refining facility according to claim 1, characterized in that the device attached to the self-propelled carriage is a furnace lid or a pot lid.

[0008]

According to the present invention, a self-propelled truck is installed when a blade plate is installed midway between the operating position and the standby position of the self-propelled vehicle and the self-propelled vehicle travels from the operating position to the standby position. Alternatively, the hot blade metal is securely removed because the red blade metal that adheres to the bottom surface of the equipment attached to the self-propelled carriage is brought into strong contact with the blade using the running force of the self-propelled carriage. be able to.

On the other hand, when the self-propelled carriage travels from the standby position to the working position, the structure is such that the solidified metal in the cooled state that remains attached to the lower surface escapes when it comes into contact with the contact blade plate. And only the hot metal can be selected and removed. Therefore, the equipment is not destroyed by an excessive force, and it is possible to selectively remove the hot metal with good workability by using the traveling force of the self-propelled carriage without requiring manpower.

An embodiment of the present invention will be described below in detail with reference to the drawings shown in FIGS. FIG. 1 is a side view showing an embodiment of a bullion removing device according to the present invention.
FIG. 1 is a perspective view showing an embodiment of a metal removing device according to the present invention. 3 is a side view of the case where the metal removal equipment in the metal refining equipment according to the present invention is applied to a VOD furnace, and FIG. 4 is a plan view showing an arrow AA of FIG.

The VOD furnace is often used for smelting Cr-containing steel. In the cases shown in FIGS. 3 and 4, the VOD furnace has two vacuum processing tanks 1 installed in a semi-underground type. , These two vacuum processing tanks 1 are alternately used. That is, after placing the ladle 2 in one of the vacuum processing tanks 1, the vacuum processing tank 1 is covered with the furnace lid 3 in an airtight manner. Molten steel containing Cr, for example, is put in the ladle 2, the pressure in the vacuum processing tank 1 is reduced, and Ar gas is blown from a porous plug (not shown) provided at the bottom of the ladle 2 to stir the molten steel. On the other hand, oxygen gas is blown onto the surface of the molten steel from the blowing type lance to decarburize the Cr-containing steel while controlling the preferential Cr oxidation.

The furnace lid 3 that covers the vacuum processing tank 1 is supported downward on the center of a portal frame 5 provided on the self-propelled carriage 4 so as to straddle the vacuum processing tank 1. In this way, the self-propelled carriage 4 equipped with the furnace lid 3 and the blowing type lance travels back and forth on the track 6 laid between the operating positions A of the two vacuum processing tanks 1. By doing so, the furnace lid 3 is alternately covered with the vacuum processing tank 1. However, the self-propelled carriage 4 does not run directly from one of the two vacuum processing tanks 1 to the other, and when the decarburization treatment of the molten steel by the one vacuum processing tank 1 is completed,
The self-propelled carriage 4 once stands by at the standby position B set in the middle portion of the base vacuum processing tank 1. When the preparation of the other vacuum processing tank 1 is completed, the self-propelled carriage 4 is moved from the standby position B to the operating position A of the other vacuum processing tank 1,
The furnace lid 3 mounted on the self-propelled carriage 4 is put on the vacuum processing tank 1.

In the present invention, the pedestals 7 are arranged in the middle of the operating position A of the two vacuum processing tanks 1 and the standby position B set in the middle of the two. Then, as shown in FIGS. 1 and 2, tilting via a hinge joint 9 attached to the front surface of a receiving block 8 fixed on a pedestal 7 (here, the one arranged on the left side in FIGS. 3 and 4) is performed. The frame 10 is tiltably supported. A backing blade plate 11 is attached to one end of the tilting frame 10 on the operating position side so as to stand upright. In the drawing, the contact blade plate 11 is inserted by a vertical portion 10A of the tilting frame 10 and a block 12 fixed to the upper surface of the tilting frame 10 into a gap 15 formed in the up-down direction so as to be replaceably attached. The blade plate 11 is
It is preferable to divide into a plurality of parts in the width direction so that the damaged part can be partially replaced. The means for attaching the backing blade plate 11 to the tilting frame 10 is not limited to the above-mentioned means, and there are many means such as screw type and cotter type, which can be appropriately selected.

At the other end of the tilting frame 10 on the standby position side,
It is equipped with a fixed counter weight 13 at the bottom,
The tilting frame 10 is always in a state of being supported by the receiving block 8 fixed to the pedestal 7 by the gravity of the counterweight 13 centered on the hinge joint 9, and the contact blade plate 11
Holds upright upright. Reinforcing ribs 14 are attached to the upper surface of the other end of the tilting frame 10 at appropriate intervals. 1 and 2, the contact blade plate 11 arranged on the left side of the two bases 7 shown in FIGS. 3 and 4 has been described, but the contact blade plate 11 on the base 7 arranged on the right side is described. Further, the counterweight 13 and the like have the positions of the tilting frame 10 on the operating position side A and the standby position side B reversed. For this reason,
Although the positional relationship of the contact blade plate 11, the counterweight 13 and the like attached to the tilting frame 10 is reversed in the left-right direction, the structure itself is the same and there is no change.

By the way, when the ladle 2 is placed in the vacuum processing tank 1 provided in the VOD furnace and the Cr-containing steel is melted,
Molten steel in the ladle 2 boils violently during decarburization, so the furnace lid 2
Scattered molten steel adheres to the lower edge of the to form red-hot metal. After the vacuum treatment of the molten steel in the ladle 2 is completed, the vacuum treatment tank 1 is returned to normal pressure, the furnace lid 3 is removed, and the self-propelled carriage 4
When traveling from the operating position A to the standby position B, the furnace lid 3
A large amount of red-hot metal is often attached to the lower edge.

According to the present invention, when the self-propelled carriage 4 travels from the operating position A to the standby position B in the direction of arrow C in FIG. The plate 11 is normally held in an upright state because the tilting frame 10 is supported by the receiving block 8 fixed on the pedestal 7 by the gravity of the counterweight 13 about the hinge joint 9. The red metal 16 attached to the lower edge of the furnace lid 3 is brought into contact with the upright contact blade plate 11 and scraped off using the traveling force of the self-propelled carriage 4. At this time, the force necessary for scraping off the red-hot metal attached to the furnace lid 3 acts on the contact blade plate 11 attached to the tilting frame 10, and this force is applied via the tilting frame 10. Since the counterweight 13 has a structure capable of being received by the receiving block 8 on the pedestal 7, the contact blade plate 11 strongly comes into contact with the bare metal 16 in a red-hot state to surely scrape it off. be able to.

In this way, if the metal 16 attached to the furnace lid 3 is not removed when it is in a red heat state, the metal 4 is moved to the standby position B and waits there while waiting for the metal. Is cooled and the solidified ingot remains attached, the self-propelled carriage 4 travels to the next operating position A of the vacuum processing tank 1, and the furnace lid 3 is removed while the solidified ingot remains attached. When covered, not only the metal contact portion of the vacuum processing tank 1 is damaged, but the molten steel spills out during vacuum degassing without the furnace lid 3 being placed in the normal position of the vacuum processing tank 1. Occurs. In order to prevent this, it is necessary to separately remove the metal in each case. Immediately after the vacuum processing is finished, the metal in the red heat state attached to the furnace lid 3 is removed as described above. It is essential.

If the self-propelled carriage 4 cannot be removed while waiting at the standby position B and remains, the metal is cooled and solidified. In the present invention, when the self-propelled carriage 4 travels from the standby position B to the next operation position A of the vacuum processing tank 1, for example, when the self-propelled carriage 4 travels in the direction indicated by the arrow D in FIG. The cooled metal remaining and attached to the furnace lid 3 comes into contact with the contact blade plate 11 when passing through the position of the pedestal 7. At this time, due to the running force of the self-propelled carriage 4, the contact blade plate 11 is pushed by the cooled metal and the counterweight
The tilting frame 10 easily rotates about the hinge joint 9 as shown by a two-dotted broken line in FIG. 1 against the gravity of 13.

For this reason, the solidified metal in the cooled state releases the force of collision with the contact blade plate 11, so that a strong force can be prevented from acting on the metal removal device including the contact blade plate 11.
As a result, it is possible to prevent troubles such as breaking the contact blade plate 11 and the like, tripping the drive motor of the self-propelled carriage 4, and stopping the self-propelled carriage 4. After the self-propelled carriage 4 has passed the position of the pedestal 7, the tilting frame 10 is rotated to the original position around the hinge joint 9 by the gravity of the counterweight 13 and is received by the receiving block 8 to be hit. The blade plate 11 returns to the normal upright state.

In the embodiment of the present invention described above, two vacuum processing tanks are arranged in parallel and used alternately, but one self-propelled carriage 4 equipped with the furnace lid 3 and the like is installed independently. Can be used in the same manner when traveling back and forth between the operating position A and the standby position B.
Of course. INDUSTRIAL APPLICABILITY The present invention can be similarly applied to a self-propelled trolley or an instrument attached to the self-propelled trolley, in addition to a furnace lid and a pot lid to be put on a ladle.

[0021]

As described above, according to the present invention,
A blade plate was installed midway between the operating position and the standby position of the self-propelled vehicle, and when the self-propelled vehicle traveled from the operating position to the standby position, it adhered to the lower surface of the self-propelled vehicle or the equipment attached to the self-propelled vehicle. Since the structure in which the reed blade plate is in an upright state and firmly contacts the ingot in the red-hot state, the hot ingot can be reliably removed with good workability.

On the other hand, when the adhered self-propelled carriage travels from the standby position to the operating position, the solidified metal in a cooled state that remains adhered to the lower surface of the self-propelled carriage or the equipment attached to the self-propelled carriage is Since the structure is such that it escapes when it comes into contact with the blade plate, it is possible to efficiently remove it by using the running force of the self-propelled carriage without selecting the hot metal without destroying the equipment and without manpower.

Further, it becomes possible to remove the ingot by the ingot removing device having the minimum strength corresponding to the red-hot ingot, and the facility cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a metal removal device according to the present invention.

FIG. 2 is a perspective view showing an embodiment of a metal removal device according to the present invention.

FIG. 3 is a side view showing the overall arrangement when the metal removal device in the metal refining equipment according to the present invention is applied to a VOD furnace.

FIG. 4 is a plan view showing an arrow AA in FIG.

[Explanation of symbols]

1 Vacuum processing tank 2 ladle 3 furnace lid 4 self-propelled carts 5 portal frame 6 orbits 7 pedestal 8 receiving blocks 9 Hinge joint 10 Tilt frame 11 Blade plate 12 blocks 13 counterweight 14 Reinforcement rib 16 bullion

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Claims (2)

(57) [Claims] 1. A device for removing metal adhered to a lower surface of a self-propelled carriage or equipment attached to the self-propelled carriage that reciprocates between an operating position and a standby position of a metal refining facility, wherein the operating position. A pedestal disposed midway between the tilting frame and the standby position, a tilting frame rotatably supported on the pedestal through a hinge joint, and the self-propelled carriage or the self-propelled carriage at one end of the tilting frame on the operating position side. A blade plate installed upright so as to have the strength to scrape off the red-hot metal attached to the lower surface of the equipment attached to, and the blade plate at the other end of the tilting frame on the standby position side. A counterweight attached so as to hold it upright, and when the self-propelled carriage travels from the operating position to the standby position, holds the contact blade plate upright by the gravity of the counterweight and attaches it to the lower surface. While the red-hot metal ingots are removed by the contact blade plate, when the traveling carriage travels from the standby position to the operating position, the cooled metal residue remaining on the lower surface passes the position of the contact blade plate. At this time, the tilting frame is rotated around the hinge joint by the running force of the self-propelled carriage against the counterweight, and the force of the cooled metal in collision with the contact blade plate is released. An apparatus for removing metal in a metal refining facility characterized by the above. 2. The apparatus for removing metal in a metal refining facility according to claim 1, wherein the device attached to the self-propelled carriage is a furnace lid or a pot lid.