JP2546900Y2 - Tundish hot dust collector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting apparatus for hot dumping of tundish used in continuous casting equipment.

[0002]

2. Description of the Related Art In general, a tundish in a continuous casting facility is an intermediate vessel lined with refractory, which is placed between a ladle and a mold to remove molten steel from the ladle. It is stored and poured into the mold via a stopper or a sliding nozzle set at the bottom.

[0003] Therefore, tundishes are used under severe conditions, and also have a great influence on the quality of cast slabs, so that they are frequently maintained. That is, when the casting is completed, the tundish is transferred to a waste zone, where the tundish is tilted by 90 ° to perform hot waste, and then transferred to another zone, where the refractory material is removed. Maintenance such as replacement is performed.

In this waste zone, when the slag and the metal are discharged to the waste pot by tilting the tundish by 90 °, a large amount of dust is blown up from the waste pot and the metal is discharged. Since smoke is generated due to the cutting, a dust collecting hood is provided to capture the smoke.

However, since the dust hood tilts the tundish by 90 degrees, it cannot be fixed and mounted directly above the tundish.

[0006] Therefore, generally, a dust collecting hood is movably mounted. For example, Japanese Utility Model Laid-Open No. 58-4257 discloses the following movable dust collecting hood.

That is, in a device in which support shafts projecting from both side surfaces in the longitudinal direction of a tundish are placed on a pair of stands, the tundish is tilted by 90 °, and hot waste is discharged into a waste pot. The floor on which the stand is erected
And a rail on which the dust collecting hood reciprocates from its standby position to above the tundish. Is shown.

However, since the movable dust collecting hood is installed on a hood stand and moves, it does not interfere even if the tundish is tilted by 90 °, but the dust collected from the waste pot does not interfere. In addition, since the dust collecting hood is separated upward from the waste pot, there is a problem that the dust collecting efficiency is low even if the suction force of the dust collecting hood is increased. And rails are required, resulting in increased equipment costs.

On the other hand, a dust collecting apparatus for hot waste is simplified as much as possible to reduce equipment costs.

[0010] That is, with respect to dust rising from the waste pot, suction holes are provided in these fixed walls in a fixed hood having both side walls standing with a tundish inside, and dust is removed from the suction holes. Inhalation and smoke generated during metal slicing, leave the lid of the tundish intact, open the preheating burner through the hole in the sash, perform metal slicing, and emit smoke to the surroundings. A dust collector for hot waste that is not used is used.

[0011] However, in such a hot dust collecting apparatus, since the spread of smoke is prevented by using the tundish lid as it is and the suction port is provided in the fixed wall, the apparatus is simplified, Since the dust rising from the pot is a hot rise, the rising speed is fast, the dust collection efficiency is extremely low only by the suction force from the side, and furthermore, a fan with a large suction force and a duct with a large suction port Is required,
There was a problem.

[0012]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to completely solve the various problems of the prior art, and the gist of the present invention is to provide a tundish (1) used in a continuous casting facility. ) Is tilted in a waste zone and a slag (7) is discharged in a hot discharging apparatus, in which the tundish (1) is tilted and enters into a substantially U-shaped fixed hood (in plan view). 8), a suction port (12) is provided on a side surface of the fixed hood (8), and the fixed hood (8) is provided with a fixed hood above the suction port (12). The movable hood (1) for opening and closing the U-shaped opening of the arm (8)
7) A dust collecting device for hot waste of a tundish, which is provided with 7).

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention together with the operation will be described in detail with reference to the embodiments shown in the accompanying drawings. 1 is a side sectional view of an embodiment of the present invention, FIG. 2 is a partially cutaway plan view of FIG. 1, and FIG.
FIG.

The present embodiment is suitable for a hot-scrap dust collecting device used for a large tundish in a multi-strand continuous caster or a high-speed continuous caster.

Reference numeral 1 denotes a tundish which has been transported to a waste zone by a transfer truck immediately after the end of the operation. That is, the tundish 1 has support shafts 2 and 2 projecting from both sides in the longitudinal direction thereof, and these support shafts 2 are mounted on a pair of stands 4 and 4 standing upright on a floor 3 of a waste zone. Is placed.

The tundish 1 is provided with a tundish lid 5 to prevent molten steel from being oxidized. The tundish lid 5 is substantially sealed. A discharge port 6 is formed. Therefore, when the tundish 1 is tilted about the support shaft 2, the slag 7 in the tundish 1 flows out from the discharge port 6.

At the lower front of the tundish 1, a floor 3
, A fixed hood 8 is provided upright. The fixed hood 8 has a U-shape in plan view.
Even if it tilts, it enters the U-shape and does not interfere. An inclined eave is provided on the upper edge of the front wall 8a of the fixed hood 8 to prevent the slag 7 flowing out from scattering.

A step 9 is formed in the middle of one side wall 8b of the fixed hood 8, and a plate-shaped fixed cover 10 is placed on the step 9 so that the fixed hood 8 is fixed. Is closing the corner. The space above the fixed cover 10 is a burner standby position 11.

On both side walls 8b, 8b of the fixed hood 8, suction ports 12, 1 are provided at positions lower than the fixed cover 10.
2 are provided. The suction port 12 communicates with a suction fan (not shown) via a duct 12a.

Preheating burner 13 at burner standby position 11
Is connected to a conduit 14, the base 14a of which is
It is connected to the burner trolley 15 so as to be able to turn horizontally. Accordingly, if the conduit 14 is horizontally turned while the burner truck 15 is traveling on the floor 3 in the left-right direction (the direction orthogonal to the front-rear direction of the tundish 1), the preheating burner 13 is moved to the burner standby position 11 Then, it moves so as to be connected to the tundish lid 5 in the upright state.

A lower part of both side walls 8a, 8a of the fixed hood 8 has a hopper shape, and a waste pot 16 is formed below the hopper.
Is placed.

In the present embodiment, the fixed hood 8 except for the fixed cover 10 and a movable hood having a size in contact with the upright tundish 1 are provided.
The door 17 is provided so as to be able to move up and down. That is, the movable hood 17 is formed of a plate, and one end thereof is fixed to the fixed hood 8.
And is fixed and supported by a pivot 18 supported by the side wall 8b. The movable hood 17 partially overlaps the fixed cover 10 when it becomes horizontal.

One end of a lever 19 is fixed to the pivot shaft 18, and the other end of the lever 19 is pin-connected to a rod of a working cylinder 20. This lever 19 has a fixed hood.
A working cylinder 20 which penetrates a horizontal slit 21 provided in the front wall 8a of the door 8 and is swingably provided on the outer surface of the front wall 8a, and a pivot shaft 18 provided on the inner surface of the front wall 8a. Are linked. Therefore, when the working cylinder 20 expands and contracts, the lever 19 swings up and down in the slit 21 around the pivot shaft 18. As a result, the pivot 18 rotates, so that the movable hood 17 is raised and lowered to close or open the U-shaped opening of the fixed hood 8.

A rail 22 is laid on the floor 3 so that a truck 23 for tundish maintenance travels. The carriage 23 is provided with a table 23a, and a protrusion of the table 23a is fixed.
And extends to a position near the discharge port 6 of the tundish 1 after the inclination has been restored.

Next, the operation of this embodiment will be described. After the operation is completed, the tundish 1 is transferred from the top of the tundish car to a transfer cart, and then carried to the waste zone by the transfer cart and placed on the stand 4. At that time, the preheating burner 13
Is in standby at the burner standby position 11, and the movable hood 1
7 stands up. Then, when the tundish 1 is tilted to some extent by a tundish tilt drive device (not shown), the slag 7 therein starts flowing out and is put into the waste pot 16. At this time, the movable hood 17 is tilted to follow the tilt drive device of the tundish 1 so as to be folded and gradually closes the U-shaped opening of the fixed hood 8.
As a result, the dust flying from the waste pot 16 is blocked by the movable hood 17 and is sucked through the suction port 12.

When the slag 7 is discharged by tilting the tundish 1 by 90 ° and the movable hood 17 becomes horizontal and completely closes the U-shaped opening of the fixed hood 8, the preheating bar is opened.
The burner 13 is moved from the burner standby position 11 so as to be connected to the tundish lid 5 in the upright state, and then a flame is blown to cut the metal. The smoke generated at that time comes out of the waste hood 6 into the fixed hood 8 closed by the movable hood 17, and is thus all sucked by the suction port 12.

In this embodiment, the movable hood 17 is raised and lowered by the working cylinder 20, but the present invention is not limited to this, and may be performed by an electric motor.

In this embodiment, the movable hood 17 can be raised and lowered. However, the present invention is not limited to this, and the fixed hood 8 is not limited to this.
The front wall 8a may be provided with a horizontal slit, and the movable hood may be made horizontal to enter and exit through this slit.

[0029]

According to the present invention, the tundish has a U-shape in which it is tilted and enters, and is a fixed hood provided with a suction port.
Not only does it not interfere with the tilting of the tundish, but it also blocks the U-shaped opening of the fixed hood with a movable hood. Can be improved. Consequently, the suction fan can be reduced in capacity.

Further, since the movable hood is provided on the substantially U-shaped fixed hood in plan view, the whole can be extremely simplified, and the equipment cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention.

FIG. 2 is a partially cut plan view of FIG. 1;

FIG. 3 is a view as seen from arrows A to FIG. 1;

[Explanation of symbols]

1: Tundish, 7: Slug, 8: Fixed hood, 12
... Suction port, 16 ... Waste pot, 17 ... Movable hood

Claims (1)

(57) [Scope of request for utility model registration] 1. A hot-drainer for tilting a tundish (1) used in a continuous casting facility in a waste zone and discharging a slag (7), wherein the tundish (1) is tilted. A fixed hood (8) having a substantially U-shape in a plan view is provided, and a suction port (12) is provided on a side surface of the fixed hood (8). A movable hood (1) for opening and closing the U-shaped opening of the fixed hood (8) above the suction port (12).
7) A dust collecting device for hot waste of a tundish, wherein the dust collecting device is provided with 7).