JP2001316709A - Stave cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stave cooler whose weight and cost can be reduced and work efficiency for installation, etc., is improved in which a plurality of cooling water passages are embedded into a metallic plate made of copper, steel, etc., and recessed grooves are formed between these passages, and to improve the cooling capacity by thinning the thickness. SOLUTION: In the stave cooler for cooling the side wall of a blast furnace body by attaching the stave cooler to the side wall of the blast furnace body, a plurality of lines of the cooling water passages for passing through the cooling water into the stave body are embedded and a plurality of lines of the recessed grooves are disposed parallel to these cooling water passages between these cooling water passages on the side surface of the stave cooler at the outside of the furnace. The side surface of this stave cooler at the outside of the furnace is formed in the projecting and the recessing shapes and further, if necessary, pressing-reduction is applied to these projecting parts to form the cooling water passages into an oval shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stave cooler used for cooling a side wall of a blast furnace body.

[0002]

2. Description of the Related Art In a blast furnace, a stave cooler is used to cool a furnace wall. Conventionally, fixed bricks are arranged in multiple stages at intervals inside the furnace of the stave cooler,
A casting stave cooler having a structure in which a cooling pipe for circulating a cooling medium is arranged on the side opposite to the inside of the furnace and cast with cast iron is used.

[0003] In this cast-made stave cooler, a fixed brick is arranged inside the furnace, which has been a problem in the case of further improving the cooling capacity. In order to solve this problem, instead of using the cast stove cooler,
As disclosed in 3-56283, a copper stave cooler has been proposed. That is, Japanese Patent Publication No. 63-56283 discloses a method for cooling a plurality of cooling media extending vertically by mechanically deep drilling a plate manufactured from a forged or rolled coarse block made of copper or a steel alloy. A cooling plate having a blind hole and a large number of grooves formed inside the furnace is disclosed. Heretofore, the use of copper stave coolers has been limited because they are expensive in comparison with cast stave coolers, but copper stave coolers have recently been adopted from the viewpoint of energy saving and long life.

[0004] For example, Japanese Patent Application Laid-Open No. 8-269510 discloses that a copper plate forged or rolled from copper or a copper alloy is used as a cooling plate, and a small diameter is formed around an edge of the cooling plate separately from an original cooling passage. A stove cooler provided with cooling holes is presented.

Japanese Patent Application No. 09-15994 discloses a stave cooler using a rolled steel sheet. This stave cooler machined the rolled steel sheet to provide a water channel in the longitudinal direction, plugged both ends of the longitudinal water channel with plugs, and then cut it to connect the longitudinal water channel from the rolled steel sheet surface, The opening portion is closed to form a U-shaped joint passage, and a cooling water supply / drain passage is provided in the cooling water passage.

[OO06]

[Problems to be Solved by the Invention]
The technology disclosed in Japanese Patent No. 56283 is a cooling plate provided with a plurality of blind holes extending vertically by mechanical deep hole processing in a cooling plate made of copper or a copper alloy with a small amount of added components. A blind hole is provided. Since the blind hole allows cooling water necessary for cooling the furnace side wall to pass therethrough, a blind hole having an equivalent diameter required for water passage is required. The thickness of the cooling plate made of copper plate to bury this blind hole in the cooling plate and protect it with copper plate,
It is determined by the diameter of this blind hole. Therefore, it is necessary to cool the space where the blind hole is not installed by using the cooling water of the blind hole until cooling.

In the first place, the cooling capacity of the cooling plate is determined by the cooling water flowing through the cooling water passage embedded therein, and the material of the cooling plate base material is changed to a copper plate in order to further improve the cooling capacity. It is about to change. Corner,
Even if a copper plate having relatively good heat conductivity is adopted as the base material, the cooling capacity cannot be improved unless the cooling plate body is uniformly cooled by the cooling water. Furthermore, if the thickness of the cooling plate is unnecessarily large, it is necessary to increase the number of blind holes or increase the diameter.

Japanese Patent Application Laid-Open No. 8-269510 discloses that the cooling plate is to be uniformly cooled as described above.
A cooling passage is arranged around the cooling plate. In this case, a cooling passage having a diameter one step smaller than that of the cooling water passage arranged at the center of the cooling plate is provided in the periphery.

As described above, in order to uniformly cool a cooling plate having a constant thickness and improve the cooling capacity, a method of increasing the number of cooling water passages has been adopted. In each case, the thickness of the stave cooler is determined by the cooling water passage, and the weight of the base metal increases and becomes heavy, and it takes time to install the stove cooler on the side wall of the blast furnace body. In addition, conventionally, by using a copper plate instead of a casting, an effect of increasing the cooling capacity and extending the life of the blast furnace side wall is exhibited. However, it has been desired to develop an inexpensive copper stave cooler that can be adopted because it is more expensive than a cast product.

[0009] Rolled steel plates and steel slabs are also used because steel is less expensive than the above copper material. However, since the thickness of the stave cooler body is determined by the cooling water passage as described above, No consideration has been given to reducing the weight of the stave cooler itself.

[0010]

SUMMARY OF THE INVENTION In view of the above state of the art, the present invention has the following features. That is, (1) In a stave cooler stretched on the side wall of the blast furnace body to cool the side wall of the blast furnace body, a plurality of rows of cooling water passages for passing cooling water through the stave body are buried, and A stove cooler characterized in that a plurality of rows of concave grooves are arranged in parallel with the cooling water channel on the furnace outer side surface of the cooler, and the furnace outer side surface of the stave cooler is formed into an uneven shape.

(2) In a stave cooler stretched on the side wall of the blast furnace furnace to cool the side wall of the blast furnace body, a plurality of rows of cooling water passages for passing cooling water through the stave body are buried, and between the cooling water passages, On the furnace outer side surface of the stave cooler, a plurality of concave grooves are arranged in parallel with the cooling water channel to make the furnace outer side surface of the stave cooler uneven, and the convex portion is pressed down to make the cooling water channel elliptical. A stove cooler characterized in that:

Further, the material of the stave cooler in the above (1) and (2) can be selected from any of rolled copper and rolled steel plate, or any of steel slab and copper slab manufactured by continuous casting equipment. Thus, a stave cooler that is inexpensive and has a further improved cooling capacity than conventional stave coolers is provided.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on an embodiment shown in the drawings. 1 is a front view showing a stave cooler according to the present invention, FIG. 2 is a view taken along arrow AA in FIG. 1, FIG. 3 is a view taken along arrow BB in FIG. 2, and FIG. Show.

FIG. 1 shows a stave cooler 1 made of rolled material.
And a plurality of rows of cooling water passages 2 through which the cooling water flows are embedded. As shown in FIG. 3, the cooling water passage 2 communicates with a water supply pipe 6 on one side and a drainage pipe 5 on the other side. The cooling water is discharged from the. Regarding this cooling water passage, a concave groove 3 is provided on the side surface of the steel shell of the stave cooler 1 in parallel with the cooling water passage.

The concave groove 3 can be easily formed by forming a shape with a roll during rolling. The cooling water passage 2 may be perforated from the lower part to the upper part of the stave cooler with a drill or the like, and the upper and lower penetrating portions may be closed with blind plugs 7 and 8 according to a conventionally disclosed technique.
The stove cooler 1 produced in this way is stretched on the side wall of a furnace body such as a blast furnace.

FIG. 2 is a sectional view of a stave cooler according to the first invention of the present invention. As an example of this cross-sectional dimension, the thickness of the stave cooler 1 is 150 mm, and the thickness of the recess is 1 mm.
It was 30 mm. Then, a cooling water channel was provided in the portion having a thickness of 150 mm. The stave cooler thus formed reduces the weight compared to conventional stave coolers,
Handling has become easier.

In the second invention, the stove cooler 1 produced as described above is further pressed down in the thickness direction from the side of the steel skin of the stave cooler 1 to crush the stave cooler 1 main body. As shown in FIG. 4, the cooling water passage 4 buried in the main body of the stave cooler 1 is deformed into an elliptical shape by applying a pressure reduction, and the surface of the cooling water passage 4 spreads on the side of the furnace body. The heat capacity of the side is improved. The reduction is
The pressure was reduced so that the thickness was reduced by about 20%. In particular,
130mm thick stave cooler 1 in thickness direction
It was reduced to become. As a result, the cross section of the cooling water passage 4 becomes an ellipse whose surface on the furnace body side is a long side, and the heat transfer area on the side of the furnace body with a high temperature load increases, thereby improving the cooling effect.

As described above, since only the shape of the stave cooler is changed, the material applied to the stave cooler of the present invention may be a rolled copper material, a rolled steel plate, or a copper slab or steel manufactured by a continuous casting facility. Regardless of which slab is adopted, the weight can be reduced compared to conventional stave coolers, and
The heat absorbing ability also improves. Further, every time the ribs 9 are provided inside the furnace of the stave cooler, the adhered substance holding force on the furnace inner surface is increased, and the life of the stave cooler is further improved.

[0019]

As described above, a plurality of rows of cooling water passages are buried in a metal plate such as copper or steel, and a stave cooler in which concave grooves are formed is used in order to reduce the weight which was a concern. It was possible and the price could be reduced. In addition, since the weight has been reduced, it is easier to perform installation and other construction work.
Work efficiency also improves. Also, by reducing the thickness of the stave cooler to reduce its thickness, the cooling capacity is improved, and the life can be greatly extended.

[Brief description of the drawings]

FIG. 1 shows a front view of a stave cooler of the present invention.

FIG. 2 is a view taken in the direction of arrows AA in FIG. 1;

FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;

FIG. 4 shows a stave in which a cooling channel is flattened by reducing a stave cooler of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Stave cooler 2 ... Cooling water passage 3 ... Concave groove 4 ... Cooling water passage after reduction 5 ... Cooling water drainage pipe 6 ... Cooling water supply pipe 7 ... Upper blind plug 8 ... Lower blind plug 9 ... Rib

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 4K015 CA05 4K051 HA01

Claims (6)

[Claims] 1. A stave cooler extending on a side wall of a blast furnace body to cool a side wall of the blast furnace body, wherein a plurality of rows of cooling water passages for passing cooling water through a stave body are buried, and between the cooling water passages, A stove cooler characterized in that a plurality of rows of concave grooves are arranged on a furnace outer side surface of a stave cooler in parallel with the cooling water passage, and the furnace outer side surface of the stave cooler is made uneven. 2. A stave cooler for cooling a side wall of a blast furnace by stretching the side wall of the blast furnace body, wherein a plurality of rows of cooling water passages for passing cooling water through a stave body are buried in the stave cooler. On the furnace outer side surface of the stave cooler, a plurality of rows of concave grooves are arranged in parallel with the cooling water passage to make the furnace outer side surface of the stave cooler uneven, and this cooling portion is pressed down to form the cooling water passage. A stove cooler characterized by having an elliptical shape. 3. The stave cooler according to claim 1, wherein the stave cooler is made of rolled copper. 4. The stave cooler according to claim 1, wherein the stave cooler is made of a rolled steel plate. 5. The stave cooler according to claim 1, wherein the stave cooler is constituted by a steel slab manufactured by a continuous casting facility. 6. The stave cooler according to claim 1, wherein the stave cooler is made of a copper slab manufactured by a continuous casting facility.