JPH0669695U - Refining furnace lining structure - Google Patents

Abstract

(57) [Summary] [Structure] In the present invention, in the lining structure of the refining furnace, the inner end surface of the lining furnace material laminated by sequentially changing the lining construction thickness is made to be a substantially flat inclined surface (1). It is a refining furnace lining structure characterized by. [Effect] With such a technical configuration, the life of the lining furnace material is approximately 10 times, and therefore, the amount of the spray repair material used is reduced to about 1/2, and the cost can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved lining structure for a refining furnace inner wall, and more particularly to a refining furnace lining structure in which a step portion is not provided on the inner wall surface and which has a substantially flat inclined surface.

[0002]

[Prior art]

 When the lining thickness is changed at the curved part of the inner wall of a refining furnace, etc., the step is usually made of lined bricks and lined. The reason for this is that there are several types of commonly used lining bricks (vertical jelly bricks) (the difference in length is in units of 90 mm). Therefore, during construction, as shown in FIG. It has a structure in which a large number of are projected on the inner wall surface.

[0003]

[Problems to be solved by the device]

 In the conventional structure as described above, when the molten metal is charged into the furnace and during the blowing, the two surfaces are naturally heated as shown by the arrow in FIG. 2 and the shear stress is generated due to the thermal expansion, as shown by the dotted line. A crack 11 is generated in the vertical direction, and a part of the lining brick falls off. Especially, on the charging side, the molten metal and scrap are charged with a shock, and the crack is promoted.

[0004]

[Means for Solving the Problems]

 The inventors of the present invention developed the structure of the present invention as a result of various studies and experiments in order to improve the above-mentioned defects of the conventional structure. The technical configuration of the present invention is based on the lining of a refining furnace. The refining furnace lining structure is characterized in that the furnace inner end surface of the lining furnace material laminated by sequentially changing the lining construction thickness is a substantially flat inclined surface (1). By adopting the dynamic structure, the life of the lining furnace material is approximately 10 times longer, and therefore the amount of spray repair material used is reduced to about 1/2, and the cost is reduced.

A specific example of the present invention will be described with reference to FIG. FIG. 1 is a vertical cross-sectional view of the loading side of the converter straight body part, 2 is a lining brick, and the brick to be constructed in the sloped area S in the lining brick is about 31 when the hot end side is shown. It is assumed that an inclined surface of ° is formed. The brick shown has a height of 150 mm and a length pitch of 90 mm, so θ = 31 °. Further, these bricks may be provided with an inclined surface by molding or cutting. When the inclined surfaces are aligned using these bricks, the stamp material shown by 4 in FIG. 1 can be used on the cold end surface side to adjust the dimensions. By using the stamp material in this way, the number of bricks with different lengths can be reduced.

By adopting the technical structure as described above, the inner wall surface, which has been a stepped portion in the past, is flattened, the two surfaces are not heated, and the impact of the molten metal and scrap that is charged is applied to the brick. Since it has a structure that does not receive at the corners, it is possible to prevent the occurrence of cracks and the peeling of the lining furnace material.

Although the example of the converter has been described above, it can be effectively applied to other refining furnaces, for example, a slag line portion of a hot metal pretreatment furnace. The angle of the inclined surface is a preferable example, and these angles are not limited, and substantially the same effect can be obtained even when bricks of about 20 mm 2 come in and out of the inclined surface.

[0008]

[Effect of device]

 (1) In the case of the conventional structure having the step portion, the lining material was completely peeled off after about 100 charges, but no peeling of the lining material was observed even after reaching 1000 charges.

(2) Peeling damage was reduced, the life of the lining furnace material was extended, the amount of spray repair material used was greatly reduced, and running costs were greatly reduced.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view on the charging side of a converter straight body section to which the structure of the present invention is applied.

FIG. 2 is a vertical sectional view similar to FIG. 1 of a conventional method.

[Explanation of symbols]

 1 inclined surface 2 lining brick 3 iron crust 4 stamp material 10 stepped portion 11 crack

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hiroyuki Takeuchi, 1st Kanazawa-machi, Kakogawa, Hyogo Prefecture Kamido Steel Works, Ltd. Kakogawa Works (72) Hiroshi Sugimoto, 2nd, Nadahama-cho, Nada-ku, Kobe, Hyogo Company Kobe Steel Works Kobe Steel Works

Claims (1)

[Scope of utility model registration request] 1. A smelting furnace lining structure, characterized in that in the lining structure of a smelting furnace, the furnace inner end surface of the lining furnace material laminated by sequentially changing the lining construction thickness is a substantially flat inclined surface (1). .