WO2006070522A1

WO2006070522A1 - Molten metal ladle

Info

Publication number: WO2006070522A1
Application number: PCT/JP2005/018925
Authority: WO
Inventors: Kiyohumi Kawai; Katsuyoshi Mukai; Toshiyuki Matsumoto
Original assignee: Daiki Aluminium Industry Co., Ltd.; Nippon Crucible Co., Ltd.
Priority date: 2004-12-28
Filing date: 2005-10-14
Publication date: 2006-07-06
Also published as: US20090065987A1; CN101065202A; EP1832363A1; JP2006181615A; EP1832363A4; JP3903321B2

Abstract

A molten metal ladle in which scales adhering to the lining surface can be removed easily and surely. In a molten metal ladle (1) comprising a bottomed tubular ladle body (10) having an upper opening, the ladle body (10) consists of a ladle upper section (12) and a ladle lower section (11) wherein the ladle upper section (12) is connected with the upper end of the ladle lower section (11). Lining layers (17, 18) are provided on the insides of the ladle upper section (12) and the ladle lower section (11), and the innermost surface of the lining layer (18) of the ladle upper section (12) is inclined such that the opening area decreases from the upper end of the lining layer (17) of the ladle lower section (11) toward the edge of the opening (13).

Description

Specification

Molten metal ladle

Technical field

[0001] The present invention relates to a molten metal ladle.

Background art

[0002] Conventionally, molten metal such as steel and aluminum has been taken out into a forging factory, put into a molten metal ladle, and transported to the factory or a remote manufacturing factory by a forklift or the like. . An example of such a molten metal ladle is disclosed in Patent Document 1.

As shown in FIG. 4, a molten metal ladle 100 disclosed in Patent Document 1 includes a ladle body 102 having a pouring pipe 101 and an opening provided at the upper portion of the ladle body 102. And a lid 104 covering 103. As shown in the figure, the ladle body 102 has a cross-sectional structure in which a steel plate outer skin 105 is provided on the outermost side, and a lining layer 108 composed of a heat insulating material 106 and a refractory material 107 is provided on the inner side. Being! /

When the molten metal is conveyed by repeatedly using the molten metal ladle 100, scale slag or the like adheres to the innermost surface of the lining layer 108 inside the ladle body 102. If scales etc. adhering to the innermost surface of the lining layer 108 fall into the molten metal, defects such as a decrease in the purity of the molten metal occur. Remove this periodically or whenever scales adhere. Has been implemented. As a means for removing scales and the like adhering to the innermost surface of the lining layer 108, a method of removing force with a removing tool such as a barb is used.

Patent Document 1: Japanese Unexamined Patent Publication No. 2000-106935

Disclosure of the invention

Problems to be solved by the invention

[0005] However, there is a problem that it is difficult to clean the lining layer 108 inside the ladle body of the molten metal ladle as disclosed in Patent Document 1. That is, the innermost surface 108b of the upper lining layer 108a provided inside the upper surface 102a of the ladle body 102 is Therefore, in order to confirm the attached state and removed state of the scale etc. on the innermost surface 108b, it is necessary to insert a face from the opening 103 or check using a mirror. There was a problem that it was difficult to confirm the state of adhesion and the state of cleaning removal. In addition, when cleaning the innermost surface 108b of the upper lining layer 108a and the vicinity of the upper corner portion 109 of the lining layer 108, a removal tool such as a scraping bar interferes with the edge of the opening 103. There was a problem that it was difficult to reliably remove scales that were difficult to carry out.

[0006] The present invention has been made to solve such a problem, and an object of the present invention is to provide a molten metal ladle that can easily and reliably remove scales and the like attached to the lining layer. Do

Means for solving the problem

[0007] The above object of the present invention is a molten metal ladle provided with a bottomed cylindrical ladle body having an opening in the upper part, the ladle body comprising an upper ladle and a lower ladle. The upper portion of the ladle is connected to the upper end of the lower portion of the ladle, and a lining layer is provided on the inner side of the upper portion of the ladle and the lower portion of the ladle. The innermost surface of the lining layer is achieved by a molten metal ladle that forms an inclined surface whose opening area decreases toward the edge of the opening.

[0008] In the molten metal ladle, it is preferable that the inclined surface has a constant inclination angle over the edge of the opening in the longitudinal sectional view, the upper end force of the lining layer below the ladle.

[0009] The lining layer is preferably formed of a heat insulating material and a refractory material.

The invention's effect

[0010] According to the present invention, it is possible to provide a molten metal ladle capable of easily and reliably removing scales and the like attached to the lining layer.

Brief Description of Drawings

FIG. 1 is a (a) cross-sectional view and (b) AA cross-sectional view of a molten metal ladle according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a molten metal ladle according to another embodiment of the present invention.

FIG. 3 is a cross-sectional view of a molten metal ladle according to another embodiment of the present invention. FIG. 4 is a sectional view showing a conventional molten metal ladle.

Explanation of symbols

[0012] Molten metal ladle

10 Ladle body

11 Lower ladle

12 Upper ladle

13 opening

14 Hull

15 Insulation

16 Refractory material

17 Lower lining layer

17a innermost surface

18 Upper lining layer

18a innermost surface

19

20

30

31 Pressurizing part

32

33 legs

33a Fork pocket

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a molten metal ladle according to the present invention will be described with reference to the accompanying drawings. FIG. 1 (a) is a sectional view of a molten metal ladle according to one embodiment of the present invention, and FIG. 1 (b) is an AA sectional view thereof.

As shown in FIG. 1, a molten metal ladle 1 is a pressurized pouring ladle, which includes a ladle body 10, a pouring pipe 30, a pressurizing portion 31, a lid 32, and a pair of legs. Parts 33 and 33 are provided.

[0015] The ladle body 10 is formed in a cylindrical shape with a circular horizontal section, and the lower ladle 11 and the upper ladle 1 And two. The lower ladle 11 is a bottomed cylinder having the same outer diameter, and is connected to the upper ladle 12 at the upper end. In the upper part of the ladle upper part 12, an opening 13 smaller than the inner diameter of the bottom face of the lower ladle is formed. Further, the outer shape of the ladle upper part 12 is formed in a taper shape so that the horizontal section becomes smaller as the upper end force of the ladle lower part 11 is directed upward. The ladle lower part 11 and the ladle upper part 12 may be formed integrally or may be formed as separate bodies and connected by connecting members! / ヽ.

[0016] The cross-sectional structure of the ladle lower part 11 is provided with a steel plate outer skin 14 on the outer side, and a lower lining layer 17 made of a heat insulating material 15 and a refractory material 16 on the inner side so as to follow the shape. . The ladle upper part 12 has a cross-sectional structure similar to that of the ladle lower part 11, and a steel plate outer skin 14 is provided on the outer side, and the heat insulating material 15 and An upper lining layer 18 made of refractory material 16 is provided. The innermost surface 18 a of the upper lining layer 18 is formed so as to be an inclined surface in which the opening area decreases from the upper end of the innermost surface 17 a of the lower lining layer 17 toward the edge of the opening 13. This inclined surface is formed so as to have a certain inclination angle from the upper end of the innermost surface 17a of the lower lining layer 17 to the edge of the opening 13 in the longitudinal sectional view of FIG.

[0017] Here, as the heat insulating material 15, for example, heat insulating brick, ceramic fiber felt, mortar, or the like can be used. Further, as the refractory material 16, for example, refractory bricks, castable refractories, plastic refractories and the like can be used.

The pouring pipe 30 has one end 30 a that is open near the bottom surface inside the ladle body 10 and the other end 30 b that is open outside the ladle body 10.

The pressurizing unit 31 is formed to protrude obliquely upward from the ladle body 10 and includes a compressed air introduction pipe 31a. Compressed air supply means (for example, a compressor) (not shown) is connected to the compressed air introduction pipe 31a, and the inside of the ladle body 10 is pressurized with compressed air, whereby the molten metal is discharged from the pouring pipe 30 and the molten metal is poured. Done. The ladle body 10 may be pressurized with a compressed inert gas instead of compressed air.

The lid 32 is provided on the top of the ladle body 10 so as to be openable and closable so as to cover the opening 13 of the ladle body 10. In the cross-sectional structure of the lid 32, a steel plate outer skin 14 is provided on the outermost side, and a lid body tension layer 19 made of a heat insulating material 15 and a refractory material 16 is provided on the inner side. The pair of leg portions 33, 33 are provided on the bottom surface of the ladle body 10 so as to be parallel to each other. The leg portions 33, 33 are formed with fork pockets 33a, 33a for inserting the fork portion of the forklift so that the molten metal ladle 1 can be conveyed by the forklift.

[0022] A method for cleaning and removing scales and the like adhering to the upper lining layer 18 and the lower lining layer 17 of the molten metal ladle 1 configured as described above will be described. First, the operator who performs the removal work opens the lid 32 and confirms the adhesion state of the scales and the like of the upper lining layer 18 and the lower lining layer 17 from the upper opening 13 of the ladle body 10.

[0023] Next, using a removing tool such as a scraping bar, washing and removing work such as scales adhering to the upper lining layer 18 and the lower lining layer 17 is performed. Specifically, a removing tool such as a barb is inserted into the ladle body 10 from the opening 13 to remove scales and the like attached to the innermost surfaces 18a, 17a of the upper lining layer 18 and the lower lining layer 17. Do it by wiping it down.

[0024] During the removing operation, the innermost surface 18a 1S of the upper lining layer 18 provided on the inner side of the upper ladle 12 1S 1S the innermost surface of the lower lining layer 17 The opening area decreases from the upper end to the edge of the opening 13 Therefore, an operator who removes the scale, etc., can easily relax from the outside of the opening 13 without checking the state of adhesion of the scale etc. by inserting his / her face through the opening 13 etc. The scales and the like can be surely washed and removed while confirming the state of adhesion and removal of the scales and the like on the entire innermost surfaces 18a and 17a of the upper lining layer 18 and the lower lining layer 17 in a proper posture. When cleaning the innermost surface 18a of the upper lining layer 18, or when cleaning the vicinity of the connecting portion 20 between the innermost surface 18a of the upper lining layer 18 and the innermost surface 17a of the lower lining layer 17, Since the removal tool can be operated without interfering with the edge of the opening 13, the removal work can be facilitated.

[0025] Further, the innermost surface 18a of the upper lining layer 18 provided on the inner side of the upper ladle 12 is directed from the upper end of the innermost surface 17a of the lower lining layer 17 to the edge of the opening 13 to reduce the opening area. Therefore, when molten metal is poured into the ladle lower part 11, a space is formed between the surface of the molten metal and the inner surface of the lid 32. As a result, even if the molten metal jumps inside the ladle body 10 during movement of the molten metal ladle 1 or during pouring of the molten metal, the molten metal adheres to the inner surface of the lid 32. The effect Can be prevented.

[0026] Further, the innermost surface 18a of the upper lining layer 18 that is an inclined surface extends from the upper end of the innermost surface 17a of the lower lining layer 17 to the edge of the opening 13 as shown in the sectional view of FIG. Since it is configured to have a certain inclination angle, it is possible to easily check the adhesion status and removal status of the scale etc. on the innermost surface 18a. In addition, when removing scales etc. attached to the innermost surface 18a of the upper lining layer 18, it is possible to carry out removal work of scales etc. without greatly changing the support posture of the removal tool such as a scraping bar. It becomes possible and quick removal work becomes possible.

[0027] In addition, in the ladle upper portion 12, the innermost surface 18a of the upper lining layer 18 is inclined from the upper end of the innermost surface 17a of the lower lining layer 17 toward the edge of the opening 13 to reduce the opening area. Thus, since the upper lining layer 18 is lined, it is possible to effectively prevent the refractory material 15 such as refractory bricks constituting the upper lining layer 18 from falling. That is, since the refractory material 15 directly below supports a part of the weight of each refractory material 15, the tensile load in the direction of gravity generated on the lining surface of the refractory material 15 is reduced, and the refractory material 15 The fall can be effectively prevented.

Here, as shown in the cross-sectional view of FIG. 1 (b), the angle Θ formed by the inclined line of the innermost surface 18a of the upper lining layer 18 and the line connecting the connection portion 20 and the edge of the opening 13 For example, when removing the scale attached to the innermost surface 18a with a straight bar, it is preferable to set the angle so that the bar and the edge of the opening 13 do not interfere with each other. An angle of ˜30 ° is preferred.

Although one embodiment of the present invention has been described above, specific aspects of the present invention are not limited to the above embodiment. For example, in this embodiment, the outer shape of the ladle upper part 12 is formed so as to be tapered, but provided on the inner side of the ladle upper part 12, the outermost inner surface 18 a of the upper lining layer 18 is formed. Forming force The outer shape of the upper ladle 12 is not particularly limited as long as it is formed so as to have an inclined surface with a smaller opening area from the upper end of the lower lining layer 17 toward the edge of the opening 13, and the outer shape of the upper ladle 12 is not particularly limited. The shape may be a cylindrical shape having the same outer diameter over the entire height direction.

[0030] In the present embodiment, as the molten metal ladle 1, compressed air or the like is blown into the ladle body 10 and pressurized, and the molten metal in the ladle body 10 is discharged out of the ladle. Pressurized pouring type for hot water The force that employs a molten metal ladle A tilting type molten metal ladle that pours water from the pouring port 51 by tilting the molten metal ladle as shown in Fig. 2 may be adopted.

Further, in the present embodiment, the innermost surface 18a of the upper lining layer 18 is constant from the upper end of the innermost surface 17a of the lower lining layer 17 to the edge of the opening 13 as shown in the sectional view of FIG. Although it is formed to be an inclined surface having an inclination angle, as shown in the sectional view of FIG. 3, it is a curved line that smoothly connects the upper end of the innermost surface 17a of the lower lining layer 17 and the edge of the opening 13. Form it to be an inclined surface.

Claims

The scope of the claims

[1] A molten metal ladle having a bottomed cylindrical ladle body having an opening at the top,

The ladle body is provided with a ladle upper part and a ladle lower part,

The upper ladle is connected to the upper end of the lower ladle,

A lining layer is provided on the inside of the ladle upper portion and the lower portion of the ladle, and the innermost surface of the lining layer at the upper portion of the ladle is formed from the upper end of the lining layer at the lower portion of the ladle. A molten metal ladle that has an inclined surface with a smaller opening area toward the edge.

[2] The molten metal ladle according to claim 1, wherein the inclined surface has a constant inclination angle from the upper end of the lining layer below the ladle to the edge of the opening in a longitudinal sectional view.

[3] The molten metal ladle according to claim 1 or 2, wherein the lining layer is formed of a heat insulating material and a refractory material.