JPS5832129Y2 - Furnace bottom brick structure - Google Patents

Description

[Detailed description of the invention] This invention relates to a brickwork structure at the bottom of a steelmaking furnace that has a two-layer structure of inner and outer bricks. To provide a brickwork structure capable of preventing inner layer bricks from falling.

For example, in converters, etc., the lining bricks often melt away,
This is one of the reasons why the furnace shuts down. Conventionally, a converter having two inner and outer brick layers was constructed as shown in FIG. 1.

That is, in the outer panel 1, as lining bricks, there are side wall inner layer bricks 2, side wall outer layer bricks 3, hearth inner layer bricks 4, and hearth outer layer bricks 5, and monolithic refractories 6 are interposed in the hearth bottom corners. It is something that has been established.

In this configuration, the inner layers of the hearth inner layer 4 and the side wall inner layer 2, the hearth outer layer 5 and the side wall outer layer 3, and the outer layers of the hearth inner layer 4 and the side wall outer layer 3 overlap each other, respectively, through the monolithic refractories 6.

For this reason, when melting loss occurs in the side wall inner layer brick 2 of the steel bath section where melting loss is most likely to occur, for example as shown by the imaginary line 7 in FIG. Alternatively, the hearth inner layer bricks 4 may no longer be able to rest against each other, and especially in converters where tilting operation is performed, the hearth inner layer bricks 4 may fall during the tilting operation, and this may cause the inner layer bricks to fall. The result was that the melting loss was further accelerated.

The hearth bricks 4 and 5 in this conventional example are made of wickerwork as shown in FIG.

The present invention was made in order to eliminate the above-mentioned drawbacks of the conventional method, and has a sagging structure in which both the inner and outer layers of the hearth lining brick can be pressed by the side wall outer layer brick.The following is an example of the invention. This will be explained based on FIGS. 2 and 4, which show the following.

In FIG. 2, reference numeral 10 denotes the outer panel of the furnace, and inside the outer panel there are inner layer bricks 11. Side wall outer layer brick 12
, hearth inner layer bricks 13 and hearth outer layer bricks 14 are constructed.

Here, at least the lowermost first layer brick 12' of the side wall outer layer bricks 12 is made longer inwardly than the other bricks, and
As shown in FIG. 4, the hearth inner layer bricks 13 have a perfect circular brick structure that gradually expands radially in the circumferential direction from the center, and the hearth outer layer bricks 14 have a wickerwork structure similar to the conventional one.

and the side wall bricks 11.12 and the hearth bricks 13.14.
In the corner between the
A monolithic refractory 17 is interposed between the first layer bricks 12' of the outer layer of the side wall. 1
The layer brick 11' will be supported on the support bricks 15 and 16.

In other words, the outer circumference side retaining brick 15 is the side wall outer layer brick 12
It is pressed from above by the side wall inner layer bricks 11, and directly presses the hearth outer layer bricks 14, and the hearth inner layer is pressed from the joint between the sill support bricks 15 and 16 through the sill support bricks 16. The bricks 13 are pressed toward the center of the furnace, and the one-way circumferential bulge bricks 16 are acted upon by the bulwark bricks 15 as well as the side wall inner wall bricks 11 from above.
It is designed so that it only receives pressure from the outside.

Note that trapezoidal bricks are used for the inner layer 13 of the hearth, which is stacked in a perfect circle.

With the structure as described above, if the side wall inner layer bricks 11 are damaged by melting, for example, if all the first layer bricks 11' are melted, no pressing force from above will be applied to the baffle bricks 16. However, even in this state, the first layer bricks 12' of the outer layer of the side wall are still connected to the sagging bricks 15.
Therefore, as mentioned above, the corresponding sagging brick 1
5, the pressing force acts not only on the hearth outer layer brick 14, but also on the hearth inner layer brick 13 via the inner circumferential side edge support brick 16 from the edge support brick 15, and the side wall inner layer brick 11 This can prevent the hearth inner layer bricks 13 from rising even if melting damage occurs.

The above description has been made regarding the converter, but the steelmaking furnace referred to in the present invention is referred to as a converter, electric furnace ADD furnace, Weitzten bottom blowing converter, etc.

As explained above, the present invention has a plurality of bulge bricks interposed on the outer periphery of the hearth inner layer bricks and on the hearth outer layer bricks, which have a perfect circular structure. The bricks are held down by the lower end bricks of the side wall outer layer bricks, and the outer bricks of the edge support bricks press the hearth outer layer bricks, and the hearth inner layer bricks are also pressed through the inner side bricks. Therefore, even if the side wall inner layer bricks are melted and damaged, the side wall outer layer bricks can simultaneously press both the inner and outer layer bricks of the hearth via the retaining bricks, and the fall of the hearth inner layer bricks can be prevented. It is possible to significantly extend the life of the furnace.

By using two or more bricks, the size can be reduced and the quality can be improved.

Further, the furnace wall bricks provided around the outer periphery of the corner portions were conventionally fused magnesia bricks, but according to the present invention, ordinary magnesia bricks can be used, which is a very effective device.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the bottom of a conventional furnace, Fig. 2 is a cross-sectional view showing the bottom of a furnace according to an embodiment of the present invention, Fig. 3 is a plan view showing a conventional mesh layer state, and Fig. 4 is a cross-sectional view showing the bottom of a furnace according to an embodiment of the present invention. FIG. 3 is a plan view showing the perfect circular area of the invention. 11.11' is the side wall inner layer brick, 12.12' is the side wall outer layer brick, 13 is the hearth inner layer brick, 14 is the hearth outer layer brick, 15
．． 16 is a hem brick, 17 is a monolithic refractory.

Claims (1)

[Scope of utility model registration request] In a steelmaking furnace having a two-layer inner and outer layer structure of lining bricks, a plurality of ribbed bricks are interposed at the outer periphery of the hearth inner layer bricks having a perfect circular structure and on the hearth outer layer bricks, The outer peripheral brick of the receiving bricks is held down by the lower end brick of the side wall outer layer brick, and the outer peripheral brick of the receiving brick presses the hearth outer layer brick, and the hearth inner layer brick is pushed through the inner peripheral side brick. A brick masonry structure for the bottom of a steelmaking furnace, characterized in that the bottom part of the furnace is pressed down.