JP2705446B2 - Ladle spiral furnace construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for building a furnace by spirally stacking bricks on the inner surface of a side wall constituting a ladle.

[0002]

2. Description of the Related Art As a method of bricking a ladle side wall,
Wedge type was common. However, in recent years, for the purpose of shortening the brick-laying time, reducing the number of furnace construction workers, and mechanizing brick-laying, the lower end of the side wall is connected to the bottom of the furnace, that is, from the road bottom corner to the upper end in a spiral in one direction. The so-called spiral furnace method of stacking bricks has been implemented.

In the spiral furnace construction method, as shown in FIGS. 2 to 5, when the furnace for the ladle 1 is constructed, the furnace bottom provided on the furnace bottom castable 2 constituting the base of the furnace bottom of the ladle 1 is used. On the perm brick 8, the starter bricks 3 with different shapes…
The bricks are piled up one or more rounds at the bottom corner of the ladle, and are sequentially set so as to produce a step corresponding to the thickness of the standard-shaped brick at the end.
Standard shape (rectangular shape) from the step at the end of
Are sequentially stacked, and the furnace wall is formed in a spiral shape (spiral shape) that proceeds upward from below. 5 is a trunnion shaft, 6 is an iron shell, and 7 is a brick.

[0004] The advantages of the above-mentioned spiral furnace construction method are that the construction time can be shortened, and that if the attack is performed at the end of the spiral, the attack bricks for each step are not required.

[0005]

In the above-mentioned spiral furnace method, although the bricking work time can be shortened as compared with the wedge type, the set of starter bricks can be used for the subsequent work of the standard shape bricks. Need to be done carefully to affect That is, when setting the starter bricks, it is necessary to number each of the irregularly shaped bricks and arrange them in order to form a smooth spiral surface. In addition, ladle construction is performed regularly, and brick dismantling and rebuilding are repeated. In the conventional method, it is necessary to set a starter brick every time the furnace is constructed. This set usually requires a construction time of about 3 hours (in the case of three workers), and this is accumulated every time a furnace is built.

[0006] Thus, in order to shorten the total furnace time, bricks made of starter bricks have been a bottleneck.

[0007] Therefore, an object of the present invention is to omit a starter brickwork operation.

[0008]

According to the present invention, which solves the above-mentioned problems, when constructing a ladle, one or more rounds of a starter brick having a different shape are brick-laid on the bottom corner of the ladle, and a standard is provided at the end. In a method of sequentially setting so as to generate a step corresponding to the thickness of the shape brick, and sequentially stacking the standard shape bricks on these starter bricks in a spiral manner; Buried in the hearth castable where the perm brick is attached below the perm brick.
Stacking standard shape bricks on the starter bricks,
When dismantling the ladle brick this time, let the bottom castable and the starter brick remain without dismantling, and at the time of this furnace construction, build up the furnace by stacking standard-shaped bricks from the step at the end of the remaining starter brick. This is a unique ladle spiral furnace construction method.

[0009]

According to the present invention, at the time of initial furnace construction, it is necessary to dispose starter bricks. ,
Since the furnace is built by stacking the standard-shaped bricks on the starter bricks, the subsequent work of stacking the starter bricks and the construction of the bottom castable is not required, and the time required for the furnace can be shortened. In the present invention, since the starter bricks are left, in order to prevent and stabilize the erosion by molten steel as much as possible, the lower part of the starter bricks is provided below the perm bricks of the furnace bottom. It is designed to be castable.

[0010]

Next, the present invention will be described in detail with reference to examples. FIG. 1 is a sectional view of a main part of a bottom part of a ladle furnace bottom and side walls according to the method of the present invention. In the method of the present invention, at the time of initial furnace construction, for example, a castable block made of high alumina is used as the starter brick 30, and the lower half of the caster block is placed in, for example, the bottom castable 2 to which the perm brick 8 of the bottom is attached. Fix it buried.

In this case, the upper surface of the starter brick 30 forms a smooth inclined surface, and a step corresponding to the thickness of the standard-shaped brick is provided while the furnace bottom corner is made one or more rounds. Can be transferred to the standard-shaped brick 4 from above, and the starter brick 30 is fixed so as not to be eroded even if the corner portion is eroded.

At the time of dismantling the ladle prior to the next furnace construction, the bottom castable 2, perm brick 8, and starter brick 30 are left, and at the next furnace construction, the standard shape is formed on the starter brick 30 from the stepped portion. The bricks 4 are piled up to construct the ladle inner wall in a spiral shape.

The starter brick 30 is preferably made of the same material as the castable 2 at the furnace bottom, for example, high alumina. As a method for manufacturing the starter brick 30, a method in which high alumina castables are poured into a mold, dried, and sintered can be employed.

Next, the effects of the present invention will be described specifically. In the conventional method, when the furnace was constructed, three steps of brick construction of a brick dismantling starter brick and a spiral construction with a standard shape brick construction were required, and this process was repeated the next and subsequent times. In the furnace construction, the point of requiring the three steps of the brick construction of the brick dismantling starter brick and the spiral construction with the standard shape brick construction is substantially the same as the conventional method, but from the next time,
Since the bottom castable, perm brick, and starter bricks are left and reused, only two steps are required: dismantling of standard-shaped bricks and spiral-building using standard-shaped bricks. Since the process can be omitted, 3 hours x 3 people =
9 hours can be omitted.

Conventionally, a furnace generally requires the steps of dismantling bricks, laying bricks, setting a starter brick, and stacking spiral bricks with standard-shaped bricks, and requires about 20 hours by three workers. And had Therefore, according to the present invention, since it is possible to reduce three hours corresponding to the set time of the starter bricks 30 after the initial furnace construction, it is apparent that the furnace construction time is greatly reduced.

[0016]

As described above, according to the present invention, the construction time of the furnace can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a main part showing a structure of a ladle bottom in the method of the present invention.

FIG. 2 is a longitudinal sectional view of a main part showing a structure of a ladle furnace bottom in a conventional method.

FIG. 3 is a partially broken perspective view showing a ladle structure.

FIG. 4 is a front view of an inner surface of a brick lamination on an inner surface of a ladle;

FIG. 5 is a front view of the main part.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ladle, 2 ... Castable bottom, 3 ... Starter brick, 4 ... Standard shape brick, 30 ... Starter brick

Claims (1)

(57) [Claims] In the construction of a ladle, the starter bricks of different shapes are bricked one or more times around the bottom corner of the ladle, and are sequentially set so that a step corresponding to the thickness of the standard shape brick is formed at the end. And a method of sequentially stacking the standard-shaped bricks on these starter bricks in a spiral manner; at the time of initial furnace construction, a furnace for attaching a perma brick, in which a lower part of the starter brick is provided below a perm brick at the bottom of the furnace. At the same time as burying in the bottom castable, the standard shape brick is piled up on the starter brick. Ladle spy characterized by stacking a brick of standard shape from the step at the end of the ladle and building the furnace Le built furnace method.