JPH05105923A - Cooling plate for furnace body of blast furnace - Google Patents

Abstract

PURPOSE:To improve the cooling effect of the flank of an iron shell in a blast furnace expanding the wear of bricks and to prevent the fall-down of in pressed monolithic refractories. CONSTITUTION:This plate is provided with a cooling plate 7 for furnace body of the blast furnace having L shaped cross section formed by bending parallel upward or downward while matching the shape of the iron shell 1 to the front part from a central part and studs 6 on the inner surface in the front of the cooling plate formed by bending.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blast furnace cooling plate for a blast furnace.

[0002]

2. Description of the Related Art In a cooling plate type blast furnace, the bricks of the furnace body are worn away with the life of the furnace, so that the heat load on the steel shell increases. On the other hand, it is necessary to take measures against the side wall building of the steel skin by press-fitting the irregular shaped refractory material when the brick wear has progressed to some extent. However, even if a pressurizing port is provided in the iron shell between the cooling boards and the irregular refractory material is pressed in from here, there is nothing to support the irregular refractory material press-fitted between the cooling boards, so the interior of the furnace during blast furnace operation is The press-fitting material falls off due to the fall of the object, and the life of the refractory material that has been walled is extremely short.

For this reason, for the purpose of supporting the press-fitted irregular-shaped refractory material, a press-fitted stud 3 as shown in FIG. 3 is attached to the inside of the furnace at the press-in port, or a simple type irregular-shaped refractory as shown in FIG. It has been attempted to attach a cooling pipe 4 for supporting the material from the inside of the furnace (for example, JP-A-60-4).
3413, JP-A-60-50106). That is, FIG. 3 is a cross-sectional view of a part of the furnace wall of the blast furnace viewed from the horizontal direction, in which 1 is a blast furnace skin and 2 is a cooling platen, and press-fitting studs 3 are provided between them. FIG. 4 is also a sectional view of a part of the furnace wall of the blast furnace, where (a) is a horizontal view and (b) is a sectional view taken along the line AA of FIG. The cooling pipe 4 is provided with a plurality of studs 6 for holding the amorphous refractory material.

[0004]

FIG. 5 shows a wall-making shape when press-fitting is performed only with a cooling board. Since the press-fitting material is protected by the cooling effect only in the vicinity of the cooling plate having the cooling effect, the press-fitting material has a shape that surrounds the cooling plate and projects toward the inside of the furnace.

FIG. 6 shows the shape of a wall when a simple cooling board such as the cooling pipe is inserted. Even in the simple cooling board, since the cooling board itself protrudes into the furnace, the irregular refractory material is also formed to protrude into the furnace.

The purpose of press-fitting the irregular shaped refractory material is to form the side wall of the steel shell, whereas the irregular shaped refractory material protruding into the furnace has sufficiently achieved the purpose of protecting the steel shell. However, since it protrudes inside the furnace, the dropping of the material due to the dropping of the charge ends quickly and the life is short.

In view of the above problems, the present invention enhances the cooling effect on the side surface of the iron shell inside the furnace in the blast furnace where the brick wear has progressed, and the irregularly shaped refractory material press-fitted forms a wall along the vicinity of the iron shell, and The purpose is to support the formed refractory wall and prevent it from falling off.

[0008]

Means for Solving the Problems The present invention is intended to achieve the above-mentioned object, and is formed by bending the front portion from the central portion upward or downward in parallel with the shape of the iron shell in the furnace. The blast furnace cooling plate has an L-shaped cross section and is characterized in that studs are provided on the front inner surface of the bending plate formed by bending the blast furnace.

[0009]

In the present invention, the shape of the cooling plate is changed from the conventional flat shape in the horizontal direction to a shape in which the tip from the central portion is bent upward or downward. The degree of bending may be such that the portion beyond the bent portion is substantially parallel to the iron skin. As a result, the irregular-shaped refractory material can be retained in the gap between the bent portion and the iron skin to prevent the refractory material from falling off. In particular, when it is bent upward, the formed wall itself is supported by the cooling plate below, so that the wall has a high effect of supporting the wall, and the life of the press-fitting material can be further prolonged.

Further, the inner surface of the front of the cooling board formed by being bent,
That is, by providing the stud on the portion facing the iron skin, the amorphous refractory material can be held more reliably. In the present invention, the irregular-shaped refractory material after being press-fitted has a shape of being sandwiched between the cooling plate and the iron shell, and thus has a large heat insulating effect on the iron shell.

Since the cooling board of the present invention is bent in the part inside the furnace, it is impossible to insert the cooling board from the outside of the iron shell like the conventional cooling board. However, lowering the contents inside the furnace to the level at which the cooling board is installed and taking a rest, taking in the cooling board from the furnace mouth manhole and suspending it with wires,
A method of attaching by pulling from the flange of the cooling board may be used.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
1 (a), 1 (b), 2 (a), and 2 (b) are schematic diagrams (FIG. 1 (a)) illustrating a cooling board according to the present invention, and when press-fitting is performed in the cooling board of the present invention. It is a figure ((b) figure) which shows the wall generation condition by the irregular-shaped refractory material of. Figure 1
The cooling board 7 exemplifying the present invention shown in (a) and (b) has a shape in which the front part of the cooling board is bent downward from the middle part. A stud 6 for supporting the amorphous refractory material 5 is provided on the front inner surface of the bent cooling plate, that is, on the side of the iron skin 1.

The cooling board 8 exemplifying the present invention shown in FIGS. 2 (a) and 2 (b) has a shape in which the front part of the cooling board is bent upward from the middle part. Also in the cooling board of FIG. 2, the studs 6 are provided on the side surface of the iron-side cooling board as in the case of FIG.

Tests were carried out using the cooling plate of the present invention.
That is, in the blast furnace shaft portion where the cooling plate pitch is 624 mm in the height direction, the blast furnace radial direction is more
When 0 mm was projected, the cooling plate that bent upward and extended 550 mm in the direction parallel to the iron shell was put in to press-fit the irregular-shaped refractory material. As a result, a wall was formed between the iron shell and the cooling plate, and the furnace shell It became possible to prevent the red heat.

[0015]

By adopting the cooling board of the present invention,
It becomes possible to enhance the cooling effect of the iron shell in the blast furnace where the bricks of the furnace body have worn out.In addition, the effect of protecting the iron shell by increasing the support effect by forming a wall between the inner surface of the iron shell and the cooling plate by press fitting is improved. It is possible to prevent skin red heat, and eventually cracks, and extend the life of the furnace body of the blast furnace.

[Brief description of drawings]

FIG. 1A is a conceptual diagram illustrating a cooling plate according to the present invention, and FIG. 1B is a conceptual diagram illustrating a wall forming shape when press fitting is performed using the cooling plate according to the present invention.

FIG. 2A is a conceptual diagram illustrating a cooling plate according to the present invention, and FIG. 2B is a conceptual diagram illustrating a wall forming shape when press-fitting is performed by using the cooling plate according to the present invention.

FIG. 3 is a conceptual diagram illustrating a conventional press-fitting stud.

FIG. 4 is a conceptual view exemplifying a conventional cooling pipe for supporting an amorphous refractory material, in which (a) is a cross-sectional view seen from a horizontal direction;
(B) is a sectional view taken along the line AA of (a).

FIG. 5 is a conceptual diagram exemplifying a wall-making shape when press-fitting is performed only with a conventional cooling plate.

FIG. 6 is a conceptual diagram illustrating the shape of a wall when a conventional simple cooling board is inserted and press-fitted.

[Explanation of symbols]

 1 Iron crust 5 Irregular fireproof material 6 Stud 7, 8 Cooling board

Claims (2)

[Claims] 1. A cooling plate for a blast furnace body having an L-shaped cross section, characterized in that the front portion from the center portion is formed in conformity with the shape of the iron shell in the furnace and is bent upward or downward in parallel therewith. 2. The blast furnace furnace cooling plate according to claim 1, wherein studs are provided on the inner surface of the front of the cooling plate formed by bending.