JPH08271161A - Press fitting construction method and apparatus for monolithic refractory for inner lining for furnace - Google Patents

Abstract

PURPOSE: To construct a permanent part easily and in a short time compared with prior art and ensure reuse thereof by forming the permanent part with pressure fitting. CONSTITUTION: A press fitting construction method and apparatus for monolithic refractory for furnace inner lining is adapted such that an intermediate frame is provided inside an iron skin 1, and a fluid permanent material is press fitted into a gap between the iron skin 1 and the intermediate frame through press fitting means to form a permanent part 2, and further a work part 6 is formed inside the permanent part 2 through a heat insulation material 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for press-fitting an irregularly shaped refractory material for a lining of a furnace, and more particularly, by forming a perm portion by press-fitting, an inner wall (1a) of a steel skin (1).
The present invention relates to a new improvement for easily, reliably and quickly forming a perm portion on the entire surface of a sheet.

[0002]

2. Description of the Related Art Conventionally, the method shown in FIGS. 11 to 13 has been adopted as a method of constructing an amorphous refractory material for a lining of a furnace, such as a tundish, which has been used conventionally. That is, in the process diagram of FIG. 12, first, in the state A, the inner wall 1a of the iron shell 1 is provided with the metal and refractory for fixing the pouring work portion 6 such as the Y stud 3 and the anchor brick 4, and the iron in the state B. A perm brick 2a is laid and piled on the entire surface of the skin 1 and the inner wall 1a to form a perm part 2, and a box-shaped middle frame 100 in the state of C is provided inside the perm part 2 to provide an irregular shape. Work material 6a that is a refractory
Then, the work portion 6 was formed by pouring from above, and curing was performed in the state of D, deframing of the middle frame 5 and preparation for drying, and in the state of E, the frame 7 of the burner was inserted from above to dry. FIG. 11 is a cross-sectional view showing a state where the construction of the refractory lining after the drying is completed, and FIG. 13 is a work material 6a.
It shows a state in which the work portion 6 is formed by pouring from above.

[0003]

Since the conventional method for press-fitting an indefinite refractory material for lining a furnace is constructed as described above, the following problems exist. That is,
In order to form this perm part, several hundred to several thousand bricks must be built one by one on the inner wall of the iron crust, and this work requires time and requires skill.
In addition, this perm brick is often dropped off when the work part, which is the casting material, is dismantled at the end of its service life, and it is difficult to reuse it, so it was discarded. Also,
Even when the furnace is in use, molten steel that has reached the perm bricks through the cracks in the work part may enter the joints of the perm bricks and reach the iron shell, which may lead to steel leakage problems in the worst case. It was

The present invention has been made to solve the above problems, and in particular, by making the permanent part of an indefinite shape, rationalization of furnace construction work, reduction of refractory cost, reduction of industrial waste amount and An object of the present invention is to provide a method and an apparatus for press-fitting an irregularly shaped refractory material for a furnace lining, which achieves prevention of steel leakage troubles.

[0005]

A method for press-fitting an indefinite refractory material for a furnace lining according to the present invention is to install an inner frame inside a steel shell having studs on the inner wall, and to install the inner wall and the inner frame. A perm material having fluidity is press-fitted between them to form a perm part, the perm part is hardened, and after removing the inner frame, an amorphous fire resistance is applied to the inside of this perm part via a heat insulating material. This is a method in which a work part is formed by pouring an object.

More specifically, it is a method of press-fitting the perm material through one or a plurality of press-fitting holes formed in the bottom of the middle frame, and press-fitting and supplying the perm material upward from the bottom.

An apparatus for press-fitting an indefinite refractory material for lining a furnace according to the present invention comprises an inner frame provided inside a steel shell having a stud on an inner wall thereof, and a press-fitting means connected to the inner frame. The perm material having fluidity, which is sent by the press-fitting means, is press-fitted between the inner wall and the inner frame.

More specifically, the perm material is press-fitted through one or a plurality of press-fitting holes formed in the bottom of the middle frame.

More specifically, the upper member of the inner frame is configured to be foldable, and the inner frame can be inserted directly below the top end iron shell of the iron shell.

[0010]

In the method and apparatus for press-fitting an indefinite refractory for lining a furnace according to the present invention, after forming studs on the inner wall of the iron shell, the inner frame of the folded upper member is inserted inside the iron shell. After that, when the upper member is assembled, a space for forming a perm portion is formed from the bottom portion between the inner wall of the iron skin and the middle frame to just below the top end iron skin. In this state, a press-fitting means is connected to one or a plurality of press-fitting holes formed in the bottom portion (side portion may also be provided) of the middle frame, and the permeating material having fluidity is press-fitted by the press-fitting means, whereby Can be press-fitted from the bottom of the middle frame to just below the roof of the crown, forming a seamless, one-piece perm.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a method and apparatus for press-fitting an amorphous refractory for lining a furnace according to the present invention will be described in detail below with reference to the drawings. It should be noted that the same or equivalent parts as those of the conventional example are designated by the same reference numerals for description. 2 to 4 schematically show the press-fitting construction method according to the present invention.
The stud 3 is formed on the inner wall 1a of the iron shell 1, the upper member 5a of the middle frame 5 is folded inward and inserted into the iron shell 1, and then the upper member 5a is assembled to form the top iron shell 1c.
The upper end 5e of the upper member 5a is set immediately below. Next, a press-fitting hole 5c formed in the bottom portion 5b of the middle frame 5
In addition, a press-fitting means (not shown) (6.0 m ³ / H with a commercially available pump is used.
When a well-known perm material having fluidity is press-fitted to the hose 20 (having the capability of
And the inner wall 1a of the iron skin 1 are press-fitted, the perm material is press-fitted upward from the bottom, and the perm material is completely filled without the need to apply vibration and pin holes as in the conventional case. To form the permanent part 2. A gap 21 for air bleeding is formed between the upper end 5e of the middle frame 5 and the top iron shell 1c, and the perm is set by the overflow gutter 5d formed inside the upper part of the middle frame 5 during press fitting. It is constructed so that it can be removed by receiving the overflow of the material.

Next, inside the perm section 2 formed by this press-fitting, an intermediate frame for a work section, which is smaller than the intermediate frame 5, is used, and the casting material is crowned via the heat insulating material 22. The work portion 6 is formed by filling the space between the iron shell 1c and the work portion middle frame 101. As shown in detail in FIG. 1, the cross-sectional configuration of FIG. 3 is, for example, 20 mm for the iron skin, 60 mm for the perm material 2, and 1 for the heat insulating material 22.
It is 2.5 mm and the work portion 6 is 130 mm.

The inner frame 5 is constructed as shown in FIGS. 5 to 7. That is, although the middle frame 5 has been briefly described with reference to FIG. 2 described above, the middle frame 5 can be foldable via a hinge 40 at the base 5A fixedly formed in a box shape and the upper end of the base 5A. It is composed of four upper members 5B configured as described above, and a corner member 5D is detachably provided at each corner portion of each upper member 5B, and each corner member 5D is fitted to the corner portion of each upper member 5B. When it is put on, a complete inner frame 5 is completed. Therefore, when setting the inner frame 5 inside the iron shell 1, the upper member 5B is folded inward (shown by the dotted line in FIG. 7) and the inside diameter of the iron shell 1 is reduced. Then, the upper member 5B and the corner member 5D are assembled. As shown in FIG. 2, the bottom portion 5b of the middle frame 5 is provided with a press-fitting hole 5c for press-fitting a perm material, and the bottom surface of the bottom portion 5b is provided with a protrusion 50 projecting downward. As shown in FIG. 8, the protrusion 50 can be fitted into the nozzle tuyere hole 51 of the iron shell 1 to fix the middle frame 5 in the iron shell 1. In addition, as a fixing structure of the middle frame 5, as another means, as shown in FIG.
It is also possible to hang it on the support bar 52 fixed to the top iron crust 1c of the iron crust 1.

Further, in the above-mentioned method, the bottom portion 5 of the middle frame 5 is
Although the case where the perm material is press-fitted from the press-fitting hole 5c of b has been described, the press-fitting hole 5c may be formed on the side portion of the middle frame 5 as shown in FIG.

[0015]

EFFECTS OF THE INVENTION Since the method and apparatus for press-fitting an amorphous refractory for lining a furnace according to the present invention are constructed as described above, the following effects can be obtained. That is, unlike the conventional, it is not necessary to build perma bricks that require time and skill, and perm materials can be installed by press-fitting in a short time. Without the need for skilled work
Both cost and time can be significantly reduced.
Also, since the perm material is integrated with the steel skin by the fixing force of the stud, it is possible to reuse the perm material after dismantling the work material, which not only reduces cost and time, but also the amount of industrial waste discharged. Can be significantly reduced. Further, since the perm portion does not have joints like perm bricks, even if molten steel enters the surface of the perm portion due to cracks in the work material, steel leakage problems do not occur.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an amorphous refractory material according to the present invention.

FIG. 2 is a configuration diagram showing an iron shell and a middle frame.

FIG. 3 is an enlarged detailed cross-sectional view showing a main part of FIG.

FIG. 4 is an enlarged detailed cross-sectional view showing a main part of FIG.

FIG. 5 is a front view (top view) of a middle frame.

FIG. 6 is a side view of a middle frame.

7 is a cross-sectional view of FIG.

FIG. 8 is a mounting configuration diagram of a middle frame.

FIG. 9 is another mounting configuration diagram of the middle frame.

FIG. 10 is a configuration diagram showing another press-fitting method.

FIG. 11 is a sectional view showing a conventional refractory lining structure.

FIG. 12 is a process diagram for constructing a conventional refractory lining structure.

13 is an enlarged detailed cross-sectional view of the main part of FIG.

[Explanation of symbols]

 1 iron skin 1a inner wall 3 stud 2 perm part 5 middle frame 5b bottom part 5c press-fitting hole 6 work part 22 heat insulating material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiro Kondo 11-1 Showa-cho, Kure City, Hiroshima Prefecture Sasaki Industrial Co., Ltd. Kure Branch (72) Inventor Shinya Okamoto 11-11 Showa-cho, Kure City, Hiroshima Prefecture Sasaki Industrial stock company Kure branch

Claims (5)

[Claims] 1. A steel shell (1) having a stud (3) on an inner wall (1a).
The inner frame (5) is installed inside of the inner wall (1a) and the inner frame (5).
A perm material having fluidity is press-fitted between the and to form a perm part (2), the perm part (2) is hardened, and the inner frame (5) is unframed. Insulation (22) inside part (2)
A method for press-fitting an amorphous refractory for lining of a furnace, characterized in that a work part (6) is formed by constructing an irregular refractory through a pipe. 2. A member formed on the bottom portion (5b) of the middle frame (5).
Or press-fit the perm material from a plurality of press-fitting holes (5c),
The method for press-fitting a permanent refractory for a furnace lining according to claim 1, wherein the perm material is press-fitted and supplied upward from the bottom portion (5b). 3. A steel shell (1) having studs (3) on an inner wall (1a)
An inner frame (5) provided inside, and a press-fitting means connected to the middle frame (5), and a fluid perm material pumped by the press-fitting means and the inner wall (1a). An apparatus for press-fitting an irregular refractory material for a furnace lining, characterized by being press-fitted between the frames (5). 4. The 1 formed on the bottom portion (5b) of the middle frame (5)
The apparatus for press-fitting an indefinite refractory for lining a furnace according to claim 3, wherein the perm material is press-fitted through a plurality of press-fitting holes (5c). 5. The inner frame (5) is configured such that an upper member (5B) is foldable, and the inner frame (5) is directly below the top end iron skin (1a) of the iron skin (1). 5. The apparatus for press-fitting an irregular refractory material for lining a furnace according to claim 3 or 4, characterized in that it can also be inserted.