JPH04123248U - soaking furnace - Google Patents

Abstract

(57) [Summary] [Purpose] To shorten the man-hours and time required to replace curve tiles, reduce the number of joints in curve tiles, and prevent mechanical wear, erosion, and fire leakage. [Structure] Curved tile 5 at the upper end of the furnace wall refractory 3b
In the soaking furnace 1 where the curve tiles 5 are installed side by side, the dimension of the curve tiles 5 used in the curve tile juxtaposition direction is set to 2.5 to 4.5 times the dimension of the furnace wall refractory thickness direction of the curve tile 5. are arranged and installed at the upper end portion of the furnace wall refractories 3b.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is to heat the steel ingot and then decompose it into rolling. This relates to soaking furnaces used for

0002

[Conventional technology]

The types of soaking furnaces used to heat steel ingots are categorized by combustion method. There are three types: two-way firing type, top one-way firing type, and bottom combustion type, and the characteristics of each type are considered. It has been adopted with consideration.

0003 In addition, when classified by the method of preheating combustion air, there are two types: heat storage type and heating type. Since ancient times, regenerative soaking furnaces have been constructed, followed by furnaces with tile recuperators. Two-way firing and bottom-firing soaking furnaces began to be constructed.

0004 After that, various metallic recuperators were developed, and this and the upper one-way firing type Soaking furnaces combined with furnaces have come to be used.

[0005] The internal dimensions of the soaking furnace are determined from the dimensions and number of steel ingots to be charged. It is determined by considering the distance between the steel ingot and the furnace wall and the distance between the steel ingots. Ta.

[0006] Figure 1 illustrates the structure of a soaking furnace, in which a steel ingot is placed. A hearth 2 is provided, and a hearth wall 3 that stands upright on this hearth 2 is provided. This furnace wall 3 has a furnace wall refractory 3b provided inside a furnace wall shell 3a. The furnace wall 3 is provided with a heating burner mounting portion 3c that serves as the burner center C. In addition, it has a structure in which a smoke exhaust passage 4 is connected.

[0007] Further, at the upper end portion of the furnace wall refractory 3b, a curved tile 5 is arranged as shown in the paper of FIG. A large number of cards are installed vertically on the screen, and these cards are used when charging and extracting steel ingots. The furnace lid 6 moves back and forth in the direction of the curved tiles 5 at the curved tiles 5. ing.

[0008] This curved tile 5 is provided to prevent fire leakage from the furnace lid 6. Conventionally, the dimension of the curved tile 5 in the furnace wall refractory thickness direction (left and right direction in FIG. 1) is For example, the width should be about 520 mm, and the curve tiles should be arranged side by side (on the paper or in the picture in Figure 1). For example, the height direction (up and down direction in Figure 1) is about 160 mm. For example, the thickness is about 300 mm, and a large number of these curve tiles 5 are used to build the furnace wall. They were installed in sequence at the upper end of the refractory 3b.

[0009]

[Problem that the idea aims to solve]

However, in such a conventional soaking furnace, the color of the curved tiles 5 used is The dimension in the side-by-side direction of curve tiles (for example, about 160 mm as described above) is Approximately 0 of the thickness direction dimension of the furnace wall refractory (as mentioned above, for example, about 520 mm) ．． We use tiles that are about 3 times the size of the curved tiles, and the dimensions in the parallel direction of the curved tiles are the same as those of the furnace wall refractories. Since it was made to be quite short compared to the thickness direction dimension, a large number of curved tiles 5 were used. Since it is necessary to install the curved tiles in line with the upper end of the furnace wall refractories 3b, 5 requires a considerable amount of replacement man-hours and time, and the curve Tile 5 was transported and installed by hand, which resulted in heavy labor. Both can be dangerous, and there are many joints in curve tiles 5. As a result, mechanical wear is likely to occur, and melting damage is also likely to occur. It has problems such as easy fire leakage, etc., and it is necessary to solve these problems. There was an issue to be solved.

0010

[Purpose of invention]

This idea was made to solve the above-mentioned conventional problems. When repairing tiles, the number of man-hours and time required for replacement can be reduced compared to before. possible, and further reduces mechanical wear by reducing curved tile joints. It is possible to further reduce the occurrence of burnout, melting damage, and fire leakage. Repair tiles safely and at low cost, and provide stable uniform heating for steel ingots. The purpose of this invention is to provide a soaking furnace that is capable of

[0011]

[Means to solve the problem]

This idea is to install a cover on the upper end of the furnace wall refractory to prevent fire leakage from the furnace lid. In a soaking furnace where curved tiles are installed side by side, the curved tiles of the curved tiles used are 2.5 to 4.5 times the thickness direction of the furnace wall refractories of curved tiles. The curved tiles are installed side by side on the upper end portion of the furnace wall refractory. In an embodiment, the curved tile is made of castable material. It is characterized by having a structure consisting of The structure of the invention is a means for solving the conventional problems mentioned above.

0012 In the soaking furnace related to this invention, the curve tiles used are arranged side by side. This curved tile has a direction dimension that is 2.5 to 4.5 times the thickness direction dimension of the furnace wall refractory. are installed side by side at the upper end of the furnace wall refractories, but in this case, curve The curved tile side-by-side direction dimension of the tile is the curved tile furnace wall refractory thickness direction dimension. If it is smaller than 2.5 times, the cover installed in line with the upper end of the furnace wall refractory The number of curve tiles increases, and the number of replacement man-hours and time required when repairing curve tiles increases. At the same time, the number of joints in curved tiles increases, which increases the risk of mechanical wear and melting. This is undesirable as it increases the risk of fire damage and fire leakage.

[0013] In addition, on the contrary, the curve tile side-by-side dimension of the curve tiles is If the thickness of the wall refractory is larger than 4.5 times, the curved tile manufacturing In addition to requiring time and skill to construct, transport, and install, it also requires a lot of heat and weight. This is not preferable because it may cause deformation or damage.

[0014]

[Effect of invention]

In the soaking furnace related to this invention, curved tiles are installed at the upper end of the furnace wall refractories. The dimensions of each individual curve tile in the curve tile juxtaposition direction are as follows: The thickness of the refractory is 2.5 to 4.5 times the thickness of the refractory, so the The number of joints in curved tiles is reduced, reducing mechanical wear, erosion, and fire leakage. This reduces the number of replacement man-hours and time when repairing curved tiles. Curved tiles can now be repaired safely and at low cost. Furthermore, it becomes possible to perform stable soaking of the steel ingot.

[0015]

【Example】

2 and 3 show one embodiment of this invention, and FIG. 2 is an example of FIG. Cross-sectional explanatory diagram showing an enlarged view of the curved tiles 5 and furnace lid 6 of the shown soaking furnace 1 , FIG. 3 is an explanatory diagram of the slope of the curve tile 5.

[0016] The curved tile 5 shown in this embodiment has a downwardly protruding surface installed on the furnace wall refractory 3b side. It has a concave part 5b in which the end of the furnace lid 6 is located, and has a concave part 5b in the inner part. It has a shape having a tapered portion 5c.

[0017] The curve tiles 5 used in this example are arranged in a parallel manner. Direction dimension L is 1600mm, furnace wall refractory thickness direction dimension W is 520mm, height direction dimension The width H is 300mm, and the dimension L in the direction of parallel curve tiles is the fireproof wall of the furnace wall. It is 3.077 times the dimension W in the thickness direction.

[0018] Therefore, such curved tiles 5 are arranged at the upper end portion of the furnace wall refractory 3b. When installing, the curved tiles 5 are transported one by one using a hoist, etc., and placed on the furnace wall refractories 3b. They will be installed side by side at the top end, and the joints of adjacent curve tiles 5 will be filled. to prevent fire leakage.

[0019] Furthermore, the curved tile 5 shown in this example is made of castable material. Therefore, the degree of freedom regarding the soaking furnace 1 can be increased.

[0020] In this way, in the soaking furnace 1 according to this invention, a large number of curve tiles 5 are installed. The width of the soaking furnace 1 is reduced, and the leakage of fire from the soaking furnace 1 is reduced, and the Stable uniform heating becomes possible.

[0021]

[Effect of the idea]

In this idea, the upper end of the furnace wall refractories is installed to prevent fire leakage from the furnace lid. The curve of the curved tiles used in a soaking furnace where curved tiles are installed side by side. The dimension in the tile side-by-side direction is 2.5 to 4.5 of the thickness direction of the furnace wall refractory of curved tiles. A configuration in which the curved tiles are doubled and installed side by side on the upper end portion of the furnace wall refractory. Therefore, when repairing curved tiles, the number of replacement man-hours and time is reduced compared to conventional methods. It is possible to shorten the length of the curved tiles and further reduce the seams of curved tiles. This can further reduce mechanical wear, erosion, and fire leakage. In addition to being able to repair curved tiles safely and at low cost, It has the remarkable effect of making it possible to stably soak the steel ingot. It is caused by

[Brief explanation of drawings]

FIG. 1 is an explanatory longitudinal cross-sectional view illustrating the structure of a soaking furnace.

FIG. 2 is an explanatory cross-sectional view showing an enlarged curved tile and furnace lid portion of the soaking furnace illustrated in FIG. 1;

FIG. 3 is an explanatory diagram of a slope of a curved tile according to an embodiment of the invention.

[Explanation of symbols]

1 Soaking furnace 3 Furnace wall 3a Furnace wall iron skin 3b Furnace wall refractories 5 Curved tiles 6 Hearth cover L Curve tile side-by-side dimension W Curved tile furnace wall refractory thickness direction dimension H Curved tile height dimension

Claims (2)

[Scope of utility model registration request] Claim 1: In a soaking furnace in which curved tiles are installed side by side at the upper end of the furnace wall refractory to prevent fire leakage from the furnace lid, the dimensions of the curved tiles used in the direction in which the curved tiles are lined up are defined as the curved tiles. A soaking furnace characterized in that the curved tiles are arranged in a size 2.5 to 4.5 times as large as the thickness direction dimension of the furnace wall refractory and are arranged in an upper end portion of the furnace wall refractory. 2. The soaking furnace according to claim 1, wherein the curved tile is made of castable material.