JP4638627B2 - Stave cooler - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stave cooler provided around a furnace wall inner surface of a metallurgical furnace such as a blast furnace.
[0002]
[Prior art]
In a metallurgical furnace such as a blast furnace, a stave cooler is used to protect the iron skin from high temperature gas in the furnace. Conventionally, as shown in FIG. 3A, the stave cooler 1 is made of cast iron, copper, or a copper alloy, and a plurality of cooling water passages 2 are provided inside, so that heat from the inside of the furnace is refractory 4. It was cut off and the iron skin 8 was protected via the castable 9.
[0003]
For example, in Japanese Patent Laid-Open No. 9-209912, as a means for improving rigidity in order to suppress the increase in the weight of the stave cooler and prevent thermal ratchet deformation, as shown in FIG. A cast stave cooler has been proposed in which the edge portion is thicker than the other portions to form the vertically long reinforcing rib 10. Further, a proposal has been proposed in which a cooling pipe is embedded in a longitudinal reinforcing rib.
[0004]
Also, in Japanese Patent Laid-Open No. 2000-104106, as shown in FIG. 3 (c), a plurality of ribs 11 are provided along the width direction of the stave body on the surface of the copper or copper alloy stave side. A structure has been proposed in which the thickness of the existing cast iron stave is made uniform and the back air is prevented.
[0005]
[Problems to be solved by the invention]
However, such a conventional structure has the following problems to be solved.
[0006]
(1) That is, in the method of Japanese Patent Application Laid-Open No. Hei 9-209902 of a stave cooler using ductile cast iron as a cast base material, the vertical reinforcing ribs at the left and right side edge portions tend to have a high base material temperature, In the case of embedding a cooling pipe, there is a concern that the bending process of the pipe becomes complicated and the manufacturing cost is increased.
[0007]
(2) Further, the rib along the width direction of the stave body of Japanese Patent Laid-Open No. 2000-104106 of a stave cooler using a copper casting as a base material has little effect of suppressing deformation in the height direction of the stave.
[0008]
Therefore, the problem to be solved by the present invention is to provide a more economical high rigidity stave cooler.
[0009]
[Means for Solving the Problems]
In the stave cooler according to the present invention, the longitudinal ribs along the stave cooler height direction are integrally formed with the casting base material at the position of the refrigerant passage formed along the stave cooler height direction on the back side. Features.
[0010]
Further, the vertically long reinforcing rib may be formed of a member different from the casting base material of the stave cooler, and may be integrally formed later with a fastening bolt.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on examples shown in the drawings. FIG. 1 shows a horizontal section of a stave cooler according to claim 1 of the present invention.
[0012]
In the present embodiment, longitudinal reinforcing ribs 3 along the height direction of the stave cooler are formed integrally with the casting base material at the approximate position of the refrigerant passage 2 on the back side of the stave cooler body 1. A refractory 4 is accommodated on the furnace inner surface side, and a recess 5 is provided in the base material between adjacent refrigerant passages and between the refrigerant passage and the outer edge of the stave cooler body. . For this reason, the weight of the stave cooler body hardly increases even if the vertically long reinforcing ribs are provided. The back position (point A) of the refrigerant passage 2 of the stave cooler has a temperature lower than that between the refrigerant passages and the left and right side edges (point B), and the position where the reinforcing rib is placed is desirable in terms of material strength. It is also possible to manufacture each rib in accordance with the contact shape with the iron skin 8. A castable 9 is press-fitted between the stave cooler body 1 and the iron skin 8.
[0013]
FIG. 2 shows a horizontal section of a stave cooler according to claim 2 of the present invention. In the present embodiment, the longitudinal reinforcing rib 3 is formed of a steel member 6 having higher strength different from the casting base material of the stave cooler, and is integrally formed later by a plurality of fastening bolts and nuts 7. Yes. A mortar paste or the like is applied between the casting base material and the steel rib member so that a gas flow path cannot be formed in the gap.
[0014]
【The invention's effect】
As described above, in the stave cooler according to the present invention, the stave cooler in which the longitudinal reinforcing ribs along the stave cooler height direction are integrally formed with the casting base material at the position of the refrigerant passage on the back side, or By forming the vertically long reinforcing rib from a member different from the cast base material of the stave cooler and forming a stave cooler integrally formed later with fastening bolts, the following excellent effects can be obtained.
[0015]
(1) By arranging the longitudinal reinforcing rib behind the refrigerant passage, the temperature of the rib can be lower than the temperature of the edge portion on the stave cooler side, so that the strength of the rib can be improved regardless of the base material.
[0016]
(2) Since a refrigerant passage for cooling the rib is not required, the manufacturing cost can be suppressed.
[0017]
(3) Even if the rib is provided by denting the base material inside the stave cooler furnace between adjacent refrigerant passages, it is not necessary to increase the weight of the base material, thereby preventing an increase in cost.
[0018]
(4) The vertical reinforcement ribs are made of another member having higher strength than the cast base material of the stave cooler, and are formed integrally with fastening bolts later to reduce the overall weight without increasing the weight of the cast base material. It is possible to improve efficiency during transportation and installation.
[0019]
(5) Since it stably contacts the iron skin over the entire length of the plurality of vertical ribs, deformation of the stave cooler itself can be suppressed.
[Brief description of the drawings]
FIG. 1 is a horizontal sectional view of a stave cooler in an embodiment of claim 1 of the present invention.
FIG. 2 is a horizontal sectional view of a stave cooler in an embodiment of claim 2 of the present invention.
FIG. 3 is a view showing a conventional stave cooler.
[Explanation of symbols]
1: Stave cooler body 2: Refrigerant passage 3: Vertical reinforcing rib 4: Refractory 5: Recess in inner furnace surface 6: Steel rib member 7: Fastening bolt / nut 8: Iron skin 9: Castable 10: Longitudinal reinforcing rib 11: rib along the width direction

Claims (2)

In a metallurgical furnace stave cooler attached to the inner surface of the furnace wall of the metallurgical furnace and having a refrigerant passage inside the casting body, a refrigerant passage formed along the height of the stave cooler on the back side of the stave cooler . A stave cooler characterized in that longitudinal ribs along the height direction of the stave cooler are formed integrally with the casting base material. 2. The stave cooler according to claim 1, wherein the vertically long rib is formed of a member different from a casting base material of the stave cooler, and is configured integrally with a fastening bolt.

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