JPH08174203A - Device for maintaining ladle - Google Patents

Abstract

PURPOSE: To melt and remove the oxide and to secure the service life of a refractory by inserting a high temp. gas burner into a ladle and executing precession. CONSTITUTION: So sufficiently long high temp. gas burner 30 as to reach the bottom of the ladle 50 is inserted into the ladle 50. Ignition is executed to the burner 30 and the precession is executed to the burner 30 by driving burner swinging mechanism. The tip of the burner 20 is swung and the circular movement is executed to melt the stuck material of metal, slag, etc., around a pouring nozzle of the ladle 50. Even if the inner part of the ladle is low temp., since the ignition is executed by supplying fuel, this operation can be performed in no problem. Further, the oxide which is not expected to oxidizing reaction, can be melted. Then, since the production of FeO is not accompanied, the service life of the refractory is not shortened. Since the procession is executed to the burner 30 even if the flame of the burner 30 is small, the surrounding of the pouring nozzle can uniformly be heated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ladle servicing device for servicing the inside of a ladle.

[0002]

2. Description of the Related Art In a ladle for transporting molten steel, slag and metal are attached to a refractory lining. These deposits are removed in a timely manner during the ladle maintenance process. As ladle maintenance technology,
For example, Japanese Utility Model Laid-Open No. 4-113153 is known. In this technique, an oxygen pipe is inserted into a ladle, pure oxygen is blown from the oxygen pipe to the deposit, and the deposit is oxidized and burned. That is, Fe is melted by the reaction of Fe + 1 / 2O ₂ = FeO.

[0003]

However, the life of the refractory is shortened because FeO produced by the above reaction damages the refractory. Further, among the deposits, Noro is an oxide having a low Fe content or zero, and the above oxidation reaction cannot be expected. That is, although the above technique is effective for bullion, it is poor for Noro. And even with pure oxygen, a fire species is necessary, and this fire species is generally obtained from a refractory material in a red hot state. That is, the work becomes difficult when the temperature of the ladle becomes low.

As described above, the oxygen pipe method has the following problems. The refractory life of the ladle is short. I can't remove Noro. Not suitable for low temperature ladle maintenance. An object of the present invention is to provide a ladle maintenance device that can solve the above problems.

[0005]

In order to achieve the above object, the present invention provides a trolley that travels on a foundation or frame, and a sufficiently long hot gas burner that is mounted on the trolley and whose tip reaches the bottom of a horizontal ladle. And a burner swivel mechanism for rubbing the high temperature gas burner into a ladle maintenance device.

Alternatively, a trolley that travels on a foundation or frame,
A hot gas burner that is mounted on this trolley and has a tip that extends horizontally to the bottom of the ladle, a burner swivel mechanism that rubs this hot gas burner, a mechanism that dismantles the slag that adheres to the ladle, and a ladle bottom A ladle maintenance device is composed of a porous plug push-out mechanism that pushes out a porous plug.

[0007]

[Function] The deposits such as noro and metal attached to the ladle are melted and removed by the high temperature gas burner which receives the supply of gas, oxygen and air to generate a high temperature flame. Since the hot gas burner melts the deposits with heat, the degree to which the refractory is damaged is small,
Noro can be melted, and combustion continues even if the atmosphere is low, so a low temperature ladle can be maintained.

[0008] At the same time, the dismantling mechanism dismantles the adhered slag,
In addition, the porous plug push-out mechanism pulls out the porous plug to maintain the inside of the ladle.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a side view of a ladle servicing apparatus according to the present invention. The ladle servicing apparatus 1 travels on rails 3 and 3 laid on a foundation 2 in a direction orthogonal to an axis L of a horizontally oriented ladle 50. Dolly 10
(Wheels 11, 11, bogie main body 12, frame 13, etc.), a horizontal swing frame 15 that horizontally swings on this frame 13, a slider 20 that moves along this horizontal swing frame 15, and this slider. It consists of a sufficiently long hot gas burner 30 supported by 20 and other auxiliary mechanisms.

The ladle 50 is a container for carrying molten steel,
The support shafts 51 and 51 (one of which is not shown) protruding from the side surface are supported by the bearing bases 52 and 52 (one of which is not shown), and the lower part is supported by the receiving base 53, so that the horizontal (this state is referred to as sideways). In this embodiment, the pan lid 5 is used.
It is still wearing 5. The pan lid 55 is locked by inserting the insertion pin 56 on the pan lid 55 side into the pin receiving box 54 on the ladle 50 side, and the pan lid 55 can be detached as necessary. In the figure, 58 is a heat-releasing lid, and 59 is a small lid that closes a small hole for inserting a Ca-based wire or the like.
1, 62 is attached to the pan lid 55 so that it can be opened and closed.

FIG. 2 is an enlarged view of a main part of the ladle servicing apparatus according to the present invention, in which the horizontal turning frame 15 is a manual handle 1.
6. The worm speed reducer 17 and the turning shaft 18 horizontally turn. Specifically, the wheel 1 is placed on the disk 14 on the frame 13.
It is a turntable where 9 and 19 roll. FIG. 3 is a sectional view taken along line 3-3 of FIG.
Rail members 15a, 15a are attached to the left and right sides of the rail 5, and the grooved wheels 21, 21 of the slider 20 are guided by these rail members 15a, 15a.

Returning to FIG. 2, the slider 20 is moved by a moving motor 22, a sprocket 23, and a chain 24 in a large stroke in the axial direction (horizontal direction in the drawing) of the horizontal ladle. Then, the high temperature gas burner 3 of the present invention is attached to the slider 20.
0 is held horizontally. This lateral holding structure will be described in detail. The hot gas burner 30 is a sufficiently long pipe burner, and one end (spherical portion 31) of the burner 30 has an eccentric coupling 32.
The burner holder (not shown) holds the position of about 1/4 of the length from the one end to the other end, and the burner holder is hung by the lifting jack 34. Attach the lifting jack 34 to the chain sheave 35.
The burner holder is moved up and down by manually driving the endless chain 36 via. Therefore, the high temperature gas burner 30 can arbitrarily change the inclination angle from the position of the solid line to the position of the imaginary line with the spherical portion 31 as the starting point. 37 is a balance weight.

FIG. 4 is a plan view of a main part of the ladle servicing apparatus according to the present invention. The high temperature gas burner 30 includes, for example, a fuel supply port 30a for supplying a fuel gas and air or oxygen or oxygen-added air (hereinafter referred to as "oxidizing gas"). And a oxidant gas supply port 30b for supplying a high temperature flame to the burner tip 30c. Since the flame is hot, it is desirable to cool the burner tip 30c with water. Slider 20
A motor 41 with a speed reducer, a bearing base 42, 42, and an eccentric coupling support shaft 43, which constitute the burner turning mechanism 40, are provided on the upper side.
Is provided to rotate the eccentric coupling 32 via the sprocket 44, the chain 45 and the sprocket 46.

FIG. 5 is a sectional view of the eccentric coupling according to the present invention. The eccentric coupling 32 has a flange 32a on the side of the eccentric coupling support shaft 43, a coupling 32c having a spherical recess 32b, and a bolt 32d. ... indicates a plurality, and the same applies to the following), and the eccentric amount is "d" in the figure, but the bolts 32d are loosened and the push bolts 32f are twisted toward the forward side to push the push bolts 32g. The amount of eccentricity can be increased from “d” by twisting the backward direction. Further, by twisting the push bolt 32f backward and twisting the push bolt 32g forward, the eccentricity can be reduced from "d". After adjusting the eccentricity in this way, the bolts 32d ... may be tightened.

Returning to FIG. 4, the eccentric coupling support shaft 43.
By rotating the eccentric coupling 32 by rotating
The high temperature gas burner 30 rubs the tip 32c of the burner 30 around the lifting jack 34. That is, the burner swivel mechanism 40 does not rotate the high temperature gas burner 30 itself, but makes the tip 32c of the burner 30 rub through. Therefore, even if the burner flame is small, it is possible to uniformly heat a wide range, and in particular,
The surroundings of the pouring nozzle at the bottom of the ladle described later can be heated uniformly.

The operation of the ladle maintenance device described above will be described below. In FIG. 1, with the slider 20 held on the left half of the horizontal swivel frame 15 and with the axis of the high temperature gas burner 30 facing the front-back direction, the carriage 10 is moved in the front-back direction to move the ladle. Face 50. The carriage 10 is stopped, the horizontal swivel frame 15 is horizontally swung by 90 ° as shown by the arrow, the hot gas burner 30 faces the ladle 50, and the hot gas burner 30 is deeply inserted into the ladle 50 as shown by the arrow. FIG. 6 is a diagram for explaining the operation of the main part of the ladle maintenance device according to the present invention, in which the hot gas burner 30 is inserted through the small hole 63 of the pot lid 55 and the tip 30c of the burner ladle 50 is inserted.
It faces the pouring nozzle 65 at the bottom of the. And burner 30
And burner 30 is rubbed. Then, the tip 30c of the burner 30 shown by the solid line swings to the position of the imaginary line and makes a circular motion, and as a result, the deposit 66 such as the metal or the slag around the pouring nozzle 65 is melted.

The high temperature gas burner 30 can be ignited (ignited) at any time by providing a pilot burner (not shown). Therefore, the ignition timing is arbitrary. Further, since it is a gas burner, the combustion is continued regardless of the temperature of the atmosphere. Therefore, even if the temperature inside the ladle 50 is low, the above-mentioned ladle maintenance work can be performed.

If the type of the target ladle 50 is changed and the diameter of the pouring nozzle 65 is changed, the eccentricity amount d in FIG. 5 may be adjusted. Further, as shown in FIG. 2, since the inclination of the high temperature gas burner 30 can be changed, the portion other than the pouring nozzle 65 can be melt-processed.

FIG. 7 is a side view of another embodiment of the ladle maintenance device of the present invention.
1, a trolley 72, a disassembly mechanism 75 horizontally movably provided on a frame 73 on the trolley 72, a porous plug push-out mechanism 80, and a high-temperature gas burner 30 whose mounting state is described in the next figure. . The dismantling mechanism 75 is the first
The air breaker 78, which is supported by the cylinder 76 and the second cylinder 77 so as to swing freely, is horizontally moved by a small carriage 79, and disassembles the attached slag of the ladle 50. The porous plug pushing-out mechanism 80 is a mechanism for pushing out a porous plug (not shown) (a porous refractory material that is attached to the bottom of the ladle 50 and blows an inert gas such as argon gas to stir molten steel). Yes, push rod 81 and small truck 82
And a drive unit 83.

FIG. 8 is a plan view according to another embodiment of the ladle servicing apparatus of the present invention, in which a high temperature gas burner 30 having a burner turning mechanism 40 is movably mounted on a frame 73. The structure is the same as that described with reference to FIGS. The operation of the ladle maintenance device 70 of another embodiment will be described with reference to FIG. 8. The hot gas burner 30 is inserted into the ladle 50 through the small holes 63 while the pot lid 55 is covered, and the periphery of the pouring nozzle 65 is washed. Further, with the pan lid 55 removed, the attached slag 67 of the ladle 50 is disassembled by the air breaker 78. Furthermore, the porous plug push-out mechanism 80
Then, push out the porous plug (not shown). Of course, these operations do not have to be performed simultaneously, and may be selectively performed as needed.

Although the carriages 10 and 72 travel on the foundation 2 (correctly, on rails) as in this embodiment, they may travel on an appropriate frame. Further, the trolleys 2 and 72 may be a self-propelled trolley in which a drive source is mounted, or a type in which the drive source is placed on a foundation or a frame and the trolley is moved via a transmission member such as a wire, rope or chain.

[0022]

The present invention has the following effects due to the above configuration. The ladle maintenance device according to claim 1 is provided with a hot gas burner whose tip is long enough to reach the bottom of the horizontal ladle.
Ignition and combustion can be performed without problems even if the temperature inside the ladle is low, and even oxides that cannot be expected to undergo oxidation reactions can be melted. In addition, FeO is not generated, which may shorten the life of the refractory material. Absent. Since the burner swirl mechanism for rubbing the high-temperature gas burner is provided, even if the flame of the burner is small, the periphery of the pouring nozzle can be heated uniformly, so that the diameter of the high-temperature gas burner can be reduced.

In the ladle maintenance device according to the second aspect of the present invention, the hot gas burner has a sufficiently long tip extending horizontally to the bottom of the ladle, a burner swivel mechanism for making a rubbing motion of the hot gas burner, and a mechanism for disassembling slag adhering to the ladle. And a porous plug push-out mechanism that pushes out the porous plug at the bottom of the ladle, so the high temperature gas burner melts and removes the metal and oxides around the pouring nozzle and the ladle by the dismantling mechanism. It is preferable that the attached slag can be disassembled and the porous plug can be pushed out by the porous plug pushing mechanism, and various maintenance work can be performed by one ladle maintenance device.

[Brief description of drawings]

FIG. 1 is a side view of a ladle maintenance device according to the present invention.

FIG. 2 is an enlarged view of a main part of a ladle maintenance device according to the present invention.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a plan view of a main part of a ladle maintenance device according to the present invention.

FIG. 5 is a sectional view of an eccentric coupling according to the present invention.

FIG. 6 is an explanatory view of the operation of the main part of the ladle maintenance device according to the present invention.

FIG. 7 is a side view of another example of the ladle maintenance device of the present invention.

FIG. 8 is a plan view of another example of the ladle maintenance device of the present invention.

[Explanation of symbols]

1, 70 ... Ladle maintenance device, 2 ... Foundation, 3 ... Rail, 1
0, 72 ... Bogie, 15 ... Horizontal swing frame, 20 ... Slider, 30 ... High temperature gas burner, 31 ... Spherical part, 32 ... Eccentric coupling, 34 ... Lifting jack, 36 ... Endless chain, 40 ... Burner turning mechanism, 41 … Motor, 43…
Eccentric coupling spindle, 50 ... Ladle, 55 ... Pot lid, 59
... small lid, 63 ... small hole, 65 ... pouring nozzle, 67 ... adhered slag, 75 ... dismantling mechanism, 78 ... air breaker, 80 ... porous plug punching mechanism, 81 ... push rod.

Front page continuation (72) Inventor Tatsuo Tanaka, 3rd light, Oshima, Kashima-machi, Kashima-gun, Ibaraki Sumitomo Metal Industries, Ltd. Kashima Steel Works (72) Hiroshi Shiroguchi, 3rd light, Oshima, Kashima-machi, Kashima-gun, Ibaraki At Kashima Steel Works, Ltd. (72) Yuzo Ogiso, Yuzo Ogiso, No. 3 Hikari, Kashima-cho, Kashima-cho, Kashima-gun, Ibaraki Prefecture Sumitomo Kin (72) Inventor Motofumi Kaminaka 1850 Minato Minato, Wakayama City, Wakayama Prefecture Sumikin Management Co., Ltd.

Claims (2)

[Claims] 1. A trolley that travels on a foundation or frame, a hot gas burner that is mounted on the trolley and has a tip that is long enough to reach the bottom of a horizontal ladle, and a burner swivel mechanism that rubs the hot gas burner. A ladle maintenance device. 2. A trolley that travels on a foundation or frame, a hot gas burner that is mounted on the trolley and has a tip that is long enough to reach the bottom of a horizontal ladle, and a burner turning mechanism that rubs the hot gas burner. A ladle maintenance device consisting of a mechanism for disassembling the slag attached to the ladle and a porous plug push-out mechanism for pushing out the porous plug at the bottom of the ladle.