JPS639568Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement in the brick structure of a converter hearth.

[Prior art]

A typical example of a converter hearth structure is a braided steel structure.
Parallel laying and ring laying are available, but each has advantages and disadvantages. In other words, as shown in Figs. 7 and 8, the wickerwork laying can be constructed entirely with one type of brick 1, but cutting is required for each hearth at the outer periphery 2 of the hearth, and furthermore, the outer periphery 2
At this point, triangular joints 3 are formed, and because a large amount of unshaped refractory material weaker than the bricks 1 is filled into the joints 3, the joints are subject to significant wear and tear, resulting in a weak structure. In other words, since the hearth is spherical, the angles of the intersections formed by the bricks 1 do not become right angles, but gradually become more acute as one moves towards the periphery. This causes gaps to form, forming triangular joints 3'. As a result, with the recent harsher operating conditions for converters, there are more cases in which the outer periphery 2 wears first in the case of mesh laying, shortening the furnace life. The same is true for parallel laying.

On the other hand, ring stacking is easy to construct and can be reinforced because regular shaped bricks 5 are used for the outer periphery 2, as shown in Figures 9 to 11, but a triangular joint 3'' gap is created between the bricks in the row. The gap is particularly large in the hearth center 6. Therefore, in order to reduce the large gap in the center 6 to some extent, the brick width in the circumferential direction is made thinner in accordance with the radius of curvature. , adjust the gap.Therefore, there is a disadvantage that there are many types of bricks.

In addition, in the case of a converter with tuyere, a ring-stacked converter is shown in Figs. 12 and 13.
This is because the ring-laid hearth bricks around the tuyere sleeve bricks 8 and tuyere sleeve receiving bricks 9 on the outer periphery of the tuyere 7 are worn out more than the hearth bricks on the outer periphery 2. In a part of the mouth peripheral area 10, the bricks are worn down to the back surface, and the remaining ring stacking bricks, tuyere sleeve bricks 8, and tuyere sleeve receiving bricks 9 fall off due to the weakness of the cellar structure. Therefore, the amount of repair material used in the outer periphery and center area,
Repair time has increased significantly, negatively impacting operations.

[Problem that the invention attempts to solve]

The present invention attempts to solve the drawbacks of the prior art, and its purpose is to ensure sufficient connection strength between bricks by minimizing the occurrence of various triangular joint gaps, Another object of the present invention is to provide a converter hearth structure that is easy to construct and can reduce costs.

[Means for solving problems]

The converter hearth structure of the present invention is composed of a central part made of parallel stacked bricks and an outer peripheral part made of ring stacked bricks around the central part. The above object is achieved by arranging irregularly shaped bricks having a width exceeding one row of parallel brick rows in the central part and three rows or less in at least a part of the bricks arranged in the boundary part. .

〔Example〕

Hereinafter, the present invention will be specifically explained based on the embodiments shown in FIGS. 1 to 6.

1 to 4 show an example in which the present invention is applied to a converter having a tuyere in the hearth.

In these figures, the hearth 11 is composed of an annular outer peripheral part 12 and a circular central part 13, and 14 indicates a boundary formed between the outer peripheral part 12 and the central part 13. The outer peripheral part 12 is constructed by stacking bricks 15 in a ring, and the central part 13 is constructed by stacking bricks 16 in a ring.
It is constructed by stacking them parallel to each other. The ratio of the outer circumferential part 12 to the central part 13 varies depending on the size of the furnace, the width of the bottom, and the number of tuyeres, so it cannot be determined with certainty, but the overall shape shown in Fig. 3 is formed into a ring shape. In the conventional example, assuming that the total number of rings is 15, the eight layers in the center are stacked in parallel. A boundary section 14 between the outer peripheral section 12 and the central section 13 is constructed of irregularly shaped bricks 17. 18 is iron skin.

In addition, in the case of this embodiment, since the tuyeres 30 are provided at the parallel stacks of the central part 13, tuyeres for inserting tuyere pipes are provided at the required number (rows) of the parallel stacks 16. A sleeve brick 31 and a tuyere sleeve receiving brick 32 are provided on its outer periphery.

As shown in FIG.
Embodiments of a, 17b, 17c, and 17d are shown. The same-shaped bricks 17a, 17b, 17c, and 17d exceed one row of the parallel stacked bricks 16 in the center, and
The width of the bricks is less than or equal to the column. With this, the number of irregularly shaped bricks used for the boundary part 14 can be reduced,
Furthermore, the number of shapes and types can be reduced (for example, from 15 types to 7 types). Furthermore, by adopting such a configuration, it is possible to prevent the occurrence of triangular joints. Furthermore, since the width is set to three rows or less, there is no problem of boundary joint melting. Further, by constructing bricks at the location where the triangular joint occurs at the joint with the lower part of the side wall, the triangular joint can be eliminated.

In the case of this example, the tuyere sleeve receiving brick 32
can be made rectangular and small, and a rectangular adjustment brick 33 can be inserted between the tuyere sleeve receiving bricks 32, so even if there is an error in the setting center of the tuyere 30, the machining adjustment of this small adjustment brick 33 is easy. This makes it possible to set the tuyere sleeve receiving brick 32. Further, when the tuyere sleeve receiving brick 32 is suspended and constructed, it becomes possible to insert the tapered tuyere sleeve receiving brick 32 that expands downward. Furthermore, the structure around the tuyere sleeve receiving brick 32 is simplified, the installation of the tuyere sleeve receiving brick 32 is facilitated, and the tuyere sleeve receiving brick 32 can be inserted even during suspended construction. I can do it.

In addition, FIGS. 5 and 6 show the hearth 11 of the present invention.
An example of application to a converter without tuyere is shown in Figure 1.
In comparison with the first embodiment shown in FIGS. 4 to 4, the other configurations are basically the same as the first embodiment except that the tuyere 30 is not provided, and this case is also similar to the previous embodiment. It is possible to achieve the following effects.

[Effect of idea]

The present invention has the following effects.

(b) Triangular joints can be reduced. In particular, the joint gap on the outer periphery can be kept to a minimum and the use of monolithic refractories can be minimized at the outermost periphery, which increases the erosion resistance of the outer periphery and strengthens the furnace. The overall structure can also be made stronger.

(b) The occurrence of the triangular joint gap in the center can be suppressed, and even when a part of the brick is damaged up to the back side, sufficient connection strength between the bricks is ensured, and the falling of the central brick is eliminated.

(c) Construction is easy and quick because the brick connection structure and brick shape are simple.

(d) Even if the furnace cost changes, the bricks of the originally designed shape can be used without changing.

(E) Due to the above effects, the types of bricks used and the number of man-hours can be reduced, and costs can be reduced.

[Brief description of the drawings]

1 to 6 are diagrams showing embodiments of the present invention. 1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a plan view of the converter hearth, FIGS. 2 and 3 are cross-sectional views taken along lines - and - in FIG. FIG. 4 is an enlarged explanatory view of the main part of FIG. 1. 5 and 6 show a second embodiment of the present invention, in which FIG. 5 is a plan view of the converter hearth, and FIG. 6 is a sectional view taken along the line of FIG. 5. Figures 7 to 13 show the conventional converter hearth structure. Figure 7 is a plan view of a conventional converter hearth made of wickerwork, Figure 8 is a sectional view taken along the line of Figure 7, and Figure 9. 10 is a plan view of a conventional converter hearth with ring stacking, FIG. 10 is a sectional view along the line of FIG. 9, FIG. 11 is an enlarged explanatory view of the main part of FIG. FIG. 13 shows a plan view of a converter hearth formed by stacking rings, and FIG. 13 shows a sectional view taken along the line shown in FIG. 12. 1... Brick, 2... Outer periphery, 3, 3', 3''...
...triangular joint, 5...brick, 6...center, 7...
...tuyere, 8...tuyere sleeve brick, 9...tuyere sleeve receiving brick, 10...tuyere surrounding area, 11
... hearth, 12 ... outer periphery, 13 ... center, 1
4... Boundary part, 15... Brick, 16... Brick, 17... Unusual brick, 18... Iron skin, 19...
... Brick, 30 ... Tuyere, 31 ... Tuyere sleeve brick, 32 ... Tuyere sleeve receiving brick, 33
...Adjustment brick.

Claims (1)

[Scope of utility model registration request] In a converter hearth structure composed of a central part made of parallel stacked bricks and an outer peripheral part made of ring stacked bricks on the outer periphery of the central part, at least one of the bricks arranged in the central part at the boundary with the outer peripheral part. A converter hearth structure characterized in that irregularly shaped bricks having a width exceeding one row and three rows or less of the parallel stacked brick rows in the central part are arranged in the central part.