JP2646174B2 - Gutter skin molding method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation for repairing refractory on the inner surface of a gutter deteriorated by passage of a molten metal such as pig iron and slag, and more particularly to a gutter used for blast furnace hearth tapping. It is a gutter skin molding method and apparatus suitable for application to the maintenance work of a gutter.

[0002]

2. Description of the Related Art A blast furnace is provided with two or more gutters. Each gutter is worn or chemically deteriorated by flowing hot pig iron or slag, or is heated or cooled by switching a gutter to be used. Repetition of irregular shaped refractories (hereinafter,
Deterioration of refractory is remarkable. Therefore, in general, repair work including dismantling of internal fireproofing, construction and drying is performed on each gutter approximately once a month.
Conventionally, such a series of repair and maintenance work is performed while the gutter is installed on the cast floor, or after the gutter is once transferred to a facility place provided in the cast floor by a lifting machine. Was.

[0003] Among such a series of repair and maintenance work, in the construction work, a core divided into several pieces in the longitudinal direction, which is a form for introducing irregular-shaped refractory logistics, is positioned at substantially the center of the width of the gutter. Connect and install each other so that
Next, the installed gutter is fixed by means of welding or the like so as not to float when the refractory is poured.

[0004] Next, a refractory having a capacity of one batch of the mixer is received in a hopper, and the hopper is moved to a necessary portion by a longitudinal guide mechanism such as a rail provided on a core, and the hopper is moved from the hopper to a medium. The kneaded refractories are simultaneously poured into two gaps formed between the child and the gutter (trough pouring).
At this time, in order to increase the degree of filling of the refractory or perform degassing,
A vibrator is inserted at the position where the refractory has been poured, and is maintained at a predetermined depth and time. Then leave it overnight and remove the core. In addition, a special formwork is provided for skin milling, and construction is performed in the same manner as in gutter pouring.

[0005]

Conventionally, gutter construction work requires a construction time of one day and eight construction personnel at peak times. is required. In addition, similar to gutter construction, skinning requires the arrangement and positioning of equipment according to the process, such as carrying in and out of a series of equipment such as a mixer and a vibrator, and setup.

That is, in the gutter construction work by the conventional method,
There were the following problems. After the casting has been completed and the core has been removed from the frame, a new formwork for the skinner is installed.
In addition, a construction period of one day is required. Also, installation and adjustment of the formwork requires skill and skill, so it is difficult to secure work personnel and the like.

[0007] Furthermore, since the work is performed in the gutter, if the work is performed in front of the furnace, the work environment is subject to dust and noise, and the work environment is likely to be inconvenient. In addition, since labor is mainly performed, labor productivity is low, and construction quality may vary.

To solve the above problem, Japanese Patent Laid-Open No. 60-50 / 1985
Japanese Patent Application Publication No. 107 (in which the skinner form is divided and fastened with bolts and nuts) is disclosed. However,
The technique disclosed in this publication requires the work of fastening bolts and nuts of the formwork and the work of cutting the bolts for the gutter construction work, and cannot sufficiently solve the conventional problems.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and a gutter skin construction method capable of shortening a construction period, requiring less experience in work, improving a work environment, and improving quality. And an apparatus.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a casting operation of a refractory of a molten metal gutter, which is performed by a release portion provided at a position where a skin is formed on a gutter core in accordance with the length of the skin. While securing a flow path through which refractory can flow from the surroundings, a skin partition plate having a height corresponding to the skin height fixed to both ends of the open part of the gutter core, and a lower part of the skin partition plate The gap formed by the opening of the inner core of the gutter core is provided with a movable skinmer core in the longitudinal direction, and the skinner partition plate and the upper surface of the skinmer core are separated by the length and opening of the skinmer. The above-mentioned problem is solved by performing a gutter pouring operation after forming a formwork that can determine the above.

[0011] The present invention also provides a gutter skin molding apparatus used for pouring an irregular type refractory into a molten metal gutter, wherein a gutter having an opening corresponding to the length of the skin is provided at a skin molding position. And a skin partition plate having a height corresponding to the skin height fixed to the gutter cores at both ends of the open portion, and an opening below the skin separator plate and an inner peripheral portion of the gutter core. The gap provided is provided with a skimmer core movable in the longitudinal direction, and a cylinder provided on the gutter core for sliding the skinmer core in the gutter longitudinal direction. This is to solve the above problem.

[0012]

According to the present invention, a release portion is provided in the gutter core at the position where the skin is molded, corresponding to the length of the skin. This release section secures a flow path through which refractory can flow from the surroundings. At the same time, a skin partition plate having a height corresponding to the skin height fixed to both ends of the open portion of the gutter core, an opening below the skin skin partition plate and an inner peripheral portion of the gutter core are formed. A gap for a skinmer movable in the longitudinal direction is provided in the gap thus set. In this case, a gutter pouring operation is performed after the skinner partition plate and the upper surface of the skinner core are formed into a formwork that determines the length and the opening of the skinner.

Thus, the following operations (1) to (4)
The effect is obtained. (1) Since skin gutter construction can be performed simultaneously with gutter construction, the construction period can be shortened by one day. (2) Since it can be performed by setting up the core for the skinmer outside the set, on-site work becomes unnecessary and the work environment is improved. (3) Since sealing and release can be performed automatically, the operation does not require any experience. (4) Since the adjustment of the construction conditions is managed within the range of the predetermined conditions, the variation in quality is eliminated.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a gutter skin forming apparatus in which the present invention is implemented for a blast furnace gutter. As shown in FIG. 1, this molding apparatus mainly includes a gutter core 10, a skin partition plate 12,
It has a skinner core 14 and a cylinder 16. FIG. 2 shows a gutter 2 and a skinner 18 formed by this apparatus.
It shows. 2A is a cross-sectional view of the entire structure, and FIG. 2B is a cross-sectional view of the structure as viewed from the longitudinal direction. In addition,
Reference numeral 4 is a refractory, 6 is a gutter main body, and 8 is a permanent refractory brick.

The gutter core 10 has a shape corresponding to the inner peripheral shape of the refractory 4 in the gutter 2 as shown in FIGS. 1 and 2, and has substantially the same shape along the gutter longitudinal direction. An opening 20 is provided at a position where the skinmer 18 is formed, and the opening 20 opens in accordance with the length of the skinmer 18 (along the longitudinal direction of the gutter).
The opening 20 is generally provided in the middle of the gutter core 10, but may be provided using the end of the gutter core 10.

The skimmer partition plates 12 are fixed to the gutter cores 10 at both ends of the opening 20 by appropriate means at a height corresponding to the height of the skimmer 18.

The skinner core 14 is movable in the longitudinal direction of the gutter core through a gap formed by the opening 22 below the skinner partition plate 12 and the inner periphery of the gutter core 10. It is moldable. Furthermore, the skinning core 14 can be made of, for example, rubber or styrene foam.
Further, a configuration may be employed in which a material from which the refractory is easily peeled or a material which is easily peeled is attached to the upper surface of the skinning core 14.

Further, the shape of the skinning core 14 is the gutter core 1
0 has the same shape as the bottom, but the upper surface has a draft to facilitate removal from the mold. In addition, the size may be any as long as it forms the open portion 20 formed between the pair of skin partition plates 12, and it is efficient to form the opening larger than the distance between the skin partition plates 12 on the installation set. is there.

The cylinder 16 is provided with a gutter core 10 for sliding the skinmer core 14 in the gutter longitudinal direction.
, For example, an air cylinder. In addition, in the gutter 2 after refractory construction of FIG. 2 (A), 24 is a slag gutter for slag.

Next, a gutter forming procedure using the gutter forming apparatus will be described. First, a release section 20 is provided at the skin mold forming position of the gutter core 10 in correspondence with the length of the skin 18, and the release section 20 secures a flow path through which the refractory 4 can flow from the periphery.

Next, at both ends of the open portion 20 of the gutter core 10, skin skin partition plates 12 having a height corresponding to the height of the skin skin 18 are provided. Furthermore, the skin divider plate 12
The movable skinner core 14 is provided by a cylinder 16 in the longitudinal direction of the gutter in a gap formed by the opening 22 below the inner part of the gutter core 10 and the inner periphery of the gutter core 10.

Next, the skinner partition plate 12 and the upper surface of the skinner core 14 are separated by the length of the skinner 18 and the release portion 2.
After setting the mold to determine 0, the refractory distribution work to the gutter is performed, and the skin maker 18 is molded.

At the time of forming the skin 18, the refractory flows from the open portion 20 of the gutter core 10 into the space formed by sealing with the upper surface of the skin core 14 while the cylinder 16 is extended. After the refractory that has flowed in is solidified to some extent, the core 14 for skinner is pulled out. When the skinner core 14 (the upper surface of the core 14 is easily peeled) is pulled out, the cylinder 16 shrinks, so that the drafter core 14 with the draft is stored in the gutter core 10. Therefore, it is possible to extract the gutter core 10 upward. As described above, at the same time as the construction of the gutter 2 is performed as shown in FIG. A space 26 through which the molten metal flows is formed below the skinmer 18.

In the above-described embodiment, a skinner as shown in FIG. 2 was formed using a mold as shown in FIG.
The scope of the present invention is not limited to this, and the present invention can be applied to any shape and use of a gutter for forming a skin metal.

[0025]

As described above, the present invention has the following effects. (1) The skinning work can be performed simultaneously with the gutter work, so that the work can be shortened, for example, by one day. (2) The automatic installation and removal of the skinner's form can shorten the setup time at the site, and can reduce the number of on-site work, thereby improving the work. (3) The automation enables work with a small number of workers, and can significantly reduce the number of workers and improve labor productivity. (4) The operation of the equipment is simple and does not require skill. (5) Since there is no change in the material of the groomed part with the guttered part, excellent effects such as excellent strength and life can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a gutter skin forming apparatus according to an embodiment of the present invention.

2A and 2B are explanatory views showing a gutter and a skinner molded by the apparatus of FIG. 1, wherein FIG. 2A is a perspective explanatory view and FIG. 2B is a sectional view.

[Explanation of symbols]

 2 gutter 4 refractory 6 gutter main body 10 gutter core 12 skinner partition plate 14 core for skinmer 16 cylinder 18 skinmer 20 release part 22 opening 24 slag gutter

Continuation of the front page (56) References JP-A-5-223514 (JP, A) JP-A-61-153219 (JP, A) JP-A-62-108797 (JP, U) , B2) Jiko 60-27918 (JP, Y2)

Claims (2)

(57) [Claims] (1) In the casting work of an irregular-shaped refractory into a molten metal gutter, a refractory can flow from the surroundings by a release portion provided at a skinner molding position of a gutter core corresponding to the length of the skinmer. A skin partition plate having a height corresponding to the skin height fixed to each of both ends of the open portion of the gutter core, and an opening below the skin skin partition plate and a gutter core. A gap formed by the inner periphery of the skinner is provided with a core for the skinmer movable in the longitudinal direction, and the skinner partition plate and the upper surface of the core for the skinmer are formed into a formwork that determines the length and the opening of the skinmer. In addition,
A gutter skinner molding method comprising performing a gutter pouring operation. 2. A gutter skin molding apparatus used for pouring an irregular-shaped refractory into a molten metal gutter, wherein a gutter core having an opening corresponding to the length of the skin at a skin molding position; A skin partition plate having a height corresponding to the skin height fixed to the gutter cores at both ends of the open portion, and an opening below the skin skin partition plate and an inner peripheral portion of the gutter core. A gutter skin mold molding comprising: a skinner core movable in a longitudinal direction with a gap; and a cylinder provided on the gutter core to slide the skinmer core in the gutter longitudinal direction. apparatus.