JPH11140519A - Structure of jointing part in stave cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working method which facilitates the mounting work of a stave and drastically reduces the working cost, and a device therefor, related to the stave for cooling a furnace wall used by fitting to the furnace wall of a metallurgical furnace, such as a blast furnace. SOLUTION: In the stave cooler type furnace wall structure constituted with the stave 1 linearly arranged with a prescribed interval in the furnace wall at the inside of the iron shell 4 in the metallurgical furnace, recessed grooves faced to prescribed positions are arranged at the periphery of side surface parts of the adjacent staves and seal plates 2a, 2b fitted to the faced recessed grooves are arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stove cooler for cooling a wall of a metallurgical furnace such as a blast furnace.

[0002]

2. Description of the Related Art Conventionally, a stave used as a furnace wall cooling device of a metallurgical furnace such as a blast furnace is worn or damaged when used for a long period of time. It is known that when such wear or breakage occurs, the cooling function is reduced, the heat load on the furnace shell is increased, and eventually the steel shell is cracked. Particularly, since the joints are worn earlier, in order to suppress the early wear of the stave joints, a stamp material having high heat resistance, alkali resistance and high thermal conductivity has been used for the stave joints.

Conventionally, a method of applying the stamp material at the stave joint portion is to fix the seal plates 2a and 2b to the open portion on the back surface of the stave 1 with bolts 10 from the open portion inside the stave furnace as shown in FIGS. Then, the stamp material 6 is filled into the gap between the staves from the inside of the furnace to the seal plates 2a and 2b. And, on the back of the stave, press-in 1 on the side of steel 4
The method of press-fitting the castables 5 from 3 has been adopted.

[0004] Japanese Patent Application Laid-Open No. Hei 7-27
In Japanese Patent No. 8626, a seal plate is provided on a furnace inner open surface of a gap between staves to seal an open surface, and a wire mesh 7 is stretched on a steel shell open surface. A lightweight refractory and an amorphous refractory containing SiC are pumped from the furnace through the opening of the steel shell and poured, and a low thermal conductive castable is used in the space between the steel shell 4 and the stave 1,
It is disclosed that a stamp material, which is a filler having high thermal conductivity, is used in the gap between the staves 1.

[0005]

In the prior art shown in FIG. 4, in order to fill the space between the staves 1 with a stamp material, a seal plate 2 is provided at an open portion on the back surface of the staves.
It is necessary to fix a and 2b from the opening part inside the stove furnace by means of the jig 12 via the adjustment bolt 11, which is very troublesome and requires a considerable construction cost.

In this method, the stamp material is filled over the entire joint between the staves. The stamp material is preferably a material that can withstand the heat load from a high-temperature gas exceeding 1000 ° C. and the alkaline attack such as Zn and K present in the furnace gas and absorb the thermal expansion on the operating surface of the stave. Conventionally, a stamp material made of graphite and a SiC component has been used.

At the joint, the inner surface of the furnace is exposed to the high-temperature gas as described above, and a graphite-based stamping material having flexibility and excellent heat resistance is required for absorbing the thermal expansion of the stave body. The outer surface of the furnace is close to the cooling pipe of the stave, so the temperature of the stave body is low and the thermal expansion is small,
In addition, since the joints are sufficiently cooled, it is not necessary to use expensive graphite stamp materials as joint materials, and it is thought that inexpensive castables can be used. It was a matter of concern among those skilled in the art how to reduce the emissions.

In Japanese Patent Application Laid-Open No. Hei 7-278626, a gap between a stave and a steel shell is filled with a castable having a low thermal conductivity, and a space between the staves is filled with a stamp material having a high thermal conductivity. However, when these two kinds of fillers are filled from the pressure inlet provided on the steel shell side, the castable material with low thermal conductivity and the stamp material with high thermal conductivity have significantly different viscosities. In this case, a very large press-fitting machine is required.In addition, if a wire mesh is placed on the open surface of the stave and stamping material smaller than the mesh of the wire mesh is pressed in, the wire mesh becomes a resistance, resulting in a larger capacity. A press-fitting machine is required.

[0009] Also, a gap often occurs at the joint surface between the seal plate and the stave. When such a gap is formed, when the castable flows around the stave, a part of the castable may leak from the gap and flow down into the furnace. Further, it is difficult to confirm the construction status of the stamp material to be filled between the staves, and there is a problem in work quality.

[0010]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems of the prior art.
In a stove cooler type furnace wall structure including staves arranged at predetermined intervals in a furnace wall inside a metal shell of a metallurgical furnace, a stave having a concave groove around a side surface portion is formed by the concave groove. (2) a joint structure of a stove cooler for cooling a furnace wall of a metallurgical furnace, wherein a seal plate is provided adjacent to a position where they face each other, and a seal plate fitted to the opposed concave groove is provided; In a stove cooler type furnace wall structure including staves arranged at predetermined intervals in a furnace wall inside a metal shell of a metallurgical furnace, a stave having a concave groove around a side surface portion is formed by the concave groove. A high thermal conductivity stamp material is filled from the furnace inner stave surface to the seal plate, and a castable material having a low thermal conductivity is provided from the inside of the metal shell of the metallurgical furnace to the seal plate. Filling A joint portion structure of the furnace wall cooling stave cooler metallurgical furnace, characterized the door, in the formation of (3) above (2) joint structure, wherein the joint is
A joint construction method for a stave cooler for cooling a metal wall of a metallurgical furnace, wherein a stamp material having high thermal conductivity is filled before the inside of the furnace, and then castable is filled from the outside of the furnace.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on an embodiment shown in the drawings. FIG. 1 is a view of an embodiment of the present invention as viewed from the inside of a furnace. FIG. 2 is a view of inserting a seal plate into the stave of the present invention, and FIG. 3 is a view taken along the line AA of FIG. 4 and 5 are views showing a conventional embodiment.

In FIG. 1, concave grooves 3 are provided in the vicinity of the side surface of the stave 1 at positions facing the adjacent staves. The seal plates 2a and 2b are inserted into the opposed concave grooves 3. That is, the sealing plates 2a and 2a
As shown in FIG. 2, b is provided to face the adjacent stove cooler, and is fitted in the concave groove 3. The concave groove 3 is a groove having an appropriate gap so as to be able to cope with a variation in the manufacturing accuracy of the stave 1 and a variation in the installation accuracy. That is, the width of the concave groove 3 is preferably set to 20 mm to 30 mm. In addition, the concave groove 3
Although not shown, the depth is determined by the engagement with the cooling pipe 8 normally arranged in the stave, and 10 mm to 20 mm is employed in this embodiment. 1 and 2, a seal plate 2a is fitted in the vertical concave groove 3 of the adjacent stave 1, and a seal plate 2b is fitted in the horizontal concave groove 3.

In FIG. 3, first, the seal plate 2 is inserted into the concave groove 3.
After fitting a and 2b, the stamp material 6 is filled from inside the furnace. The stamp material 6 uses a refractory with high thermal conductivity made of graphite, SiC or the like. Due to the press-fitting of the stamp material 6, the seal plate 2a fitted between the staves 1 is pressed to one side. Thus, the sealing plate 2a
And 2b are press-fixed and fixed by the stamp material 6 and fitted in the concave grooves 3, so that the sealing plate 2 as shown in FIG.
There is no need to have a complicated structure such as work required to lock the a and 2b to the stave 1.

Then, a castable 5 having a low thermal conductivity is press-fitted from a steel-shell press-in port (not shown). Even if the castables 5 are press-fitted, the sealing plates 2a and 2b are pressed by the stamp material 6 from the inside of the furnace, so that there is no leakage.

Usually, the main body of the stave 1 is cooled by the cooling pipe 8 installed in the stave 1, but the cooling effect of the cooling pipe 8 cannot be expected to the entire surface in the thickness direction of the stave 1. The working range of the stamp material 6 is determined by the cooling effect from the stave 1. The cooling effect can be expected only up to the back of the brick 9 attached to the front of the stave 1. The inside of the furnace from the back of the brick 9 has heat resistance and alkali resistance, and absorbs thermal expansion between the staves 1. Materials that can be used are desirable.

For this reason, the expensive stamp material 6 which has conventionally been used on the front side in the thickness direction of the stave 1 is used only for the portion on the back side of the brick 9 attached to the stave cooler 1. Therefore, the position of the concave groove 3 arranged opposite to the adjacent stave 1 also corresponds to the brick 9 attached to the stave 1.
It is arranged on the back. Thereby, the conventional stave 1
It is possible to reduce the amount of the stamp material 6 used for the entire area.

[0017]

As described above, according to the present invention, a concave groove is arranged between adjacent staves, a sealing plate is fitted in the concave groove, and a stamp material is inserted from the inside of the furnace. Press-fitting the castables from the steel side prevents castables from leaking out of the seal plate and reduces the amount of stamp material used, and simplifies the mounting structure of the seal plate, resulting in significant construction costs. Can be reduced to

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view of an embodiment of the present invention as viewed from the inside of a furnace.

FIG. 2 is a perspective explanatory view of inserting a seal plate into a stave of the present invention.

FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 2;

FIG. 4 is a diagram showing a conventional example.

FIG. 5 is a diagram showing a conventional example.

[Explanation of symbols]

 Reference Signs List 1 stave 2a seal plate 2b seal plate 3 concave groove 4 steel shell 5 castable 6 stamp material 7 wire mesh 8 cooling pipe 9 brick 10 bolt 11 adjusting bolt 12 adjusting bolt jig 13 pressure inlet

Claims (3)

[Claims] 1. A stave cooler type furnace wall structure comprising staves arranged at predetermined intervals in a furnace wall inside a steel shell of a metallurgical furnace, wherein a stave having a concave groove around a side surface portion. Characterized in that a joint plate is provided adjacent to a position where the concave grooves oppose each other, and a seal plate fitted to the opposing concave grooves is disposed. 2. A stave cooler type furnace wall structure comprising staves arranged at predetermined intervals in a furnace wall inside a steel shell of a metallurgical furnace, wherein a stave having a concave groove around a side portion. Is disposed adjacent to the position where the concave grooves face each other, from the furnace inner stave surface to the seal plate, is filled with a stamp material having high thermal conductivity, and from the metal shell inside the metal shell to the seal plate. A joint structure of a stove cooler for cooling a furnace wall of a metallurgical furnace, wherein the joint is filled with castables having a low thermal conductivity. 3. The metallurgical furnace according to claim 2, wherein the joint is filled with a stamp material having high thermal conductivity before the inside of the furnace, and then castable from the outside of the furnace. Joint construction method of the stove cooler for cooling the furnace wall.