JPH0537950U - Brick of the converter drawing part and its fall prevention structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a lining brick for a converter drawing part and a structure for preventing the falling of the converter drawing part to be simplified and simplified to the extent that it can be carried out by a brick stacking machine. [Structure] In a converter brick lining brick 2 having a substantially parallelogram vertical section, a Y-type stud 3 is provided on the side surface thereof, and a Y-type stud 3 is also provided inside the iron casing 1 to form the iron casing 1 and the An amorphous refractory material 4 is filled in a gap having a width of 50 mm or more with the lining brick 2 for the narrowed portion of the converter.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lining brick for a narrowed portion of a converter and a structure for preventing the lining brick from coming off.

[0002]

[Prior Art]

 Fig. 5 shows an example of the structure of a lining brick for a narrowing part of a converter, which is currently commonly used. FIG. 5 (a) is a schematic perspective view thereof, and FIG. 5 (b) is a schematic explanatory view showing five groups of arranged inner bricks in an extracted manner. As is clear from Fig. 5 (a) and Fig. 5 (b), the existing converter brick lining brick 5 has a substantially vertical parallelepiped in the longitudinal direction, and an eyebolt 6 is provided on its side surface. The eyebolt 6 is provided with a round steel bar 9 which is circumferentially provided through a supporting metal member 8 installed inside the iron shell 7 in advance so as to prevent the lining brick 5 from falling off.

Further, FIGS. 6 to 8 respectively show a falling-off preventing structure of a lining brick for a converter throttle portion proposed by Japanese Patent Laid-Open No. 1-309915. 6 and 7 are a vertical cross-sectional view and a plan view, respectively, showing an example of the lining brick according to this proposal, and FIG. 8 is a vertical cross-sectional view showing the converter throttle portion dropout prevention structure according to this proposal. In FIG. 6 or FIG. 8, a lining brick 13 for a converter narrowing part having a parallelogram shape with a vertical cross section having a hook metal engaging hole 14 on the bottom surface or a side surface, and a converter brick perm brick 10 are provided. A generally U-shaped hook metal 12 is attached and arranged on the inner side through a predetermined gap 11, and the other end of the hook metal 12 is locked by a ring-shaped steel material 15 By filling amorphous refractory material in 11, the converter throttling prevention structure is constructed.

[0004]

[Problems to be solved by the device]

 However, in these conventional structures for preventing falling of inner bricks for converter throttle parts, as shown in FIGS. 5 (a) and 5 (b), at least one eyebolt 6 is installed on the inner brick 5 and at the same time, iron It is necessary to circulate a round steel plate 9 inside the leather 7 by penetrating the eyebolt 6, or as shown in FIGS. 6 to 8, at least one U-shaped hook 12 is provided on the lining brick 13. It was necessary to install them individually and lock them with the ring-shaped steel material 15.

[0007] Therefore, the falling prevention work, especially the work for locking the eyebolt or the hook metal with the round steel or the ring-shaped steel material, is complicated, resulting in extremely long construction time and poor work efficiency. In particular, these works are works in a narrow space, and it is a work that should be mechanized as much as possible. Therefore, as with the general wall of a converter, it may be possible to introduce a brick stacking machine into the throttle section of the converter for mechanization, but since the above work is extremely complicated, it is suitable for mechanization. Poor sex. Therefore, it is necessary to simplify and simplify the work in constructing the converter throttle section.

An object of the present invention is to simplify and simplify the furnace construction of the converter throttle part to the extent that it can be carried out by a brick-laying machine. Specifically, the eyebolts and the An object of the present invention is to provide an inner lining brick for a narrowed portion of a converter and a structure for preventing it from falling off, which does not require the use of round steel, or a hook metal or a ring-shaped steel material.

[0007]

[Means for Solving the Problems]

 Here, the gist of the present invention is a liner brick for a converter drawing part having a substantially parallelogram vertical section, and a converter drawing part brick having a Y-shaped stud on the side surface. is there.

Further, the present invention provides a falling-out prevention structure for a lining brick for a narrowed portion of a converter, which is (i) a steel shell of a converter having Y-shaped studs provided inside thereof, and (ii) an inside of the steel shell. 2. The converter throttle block brick according to claim 1, further comprising: a gap of 50 mm or more, and the Y-type stud is located on the iron skin side, and (iii) filling the gap. It is a structure that prevents the falling of the lining bricks for the narrowing part of the converter, which is characterized by having it combined with the specified irregular refractory.

[0009]

[Action]

 FIG. 4 is a schematic vertical sectional view showing a furnace construction structure of a converter to which the present invention is applied. The inner lining brick for the converter throttle portion and the structure for preventing it from falling off according to the present invention are applied to the converter throttle portion shown in the portion A in FIG. In the present invention, as a lining brick for a converter drawing part, a converter drawing part brick in which a Y-stud is provided on a side surface of a converter drawing part brick having a generally parallelogram is used. Bricks are placed from a steel shell with Y-shaped studs on the inside so that there is a certain gap, and an indeterminate refractory is press-fitted into the gap to dry and heat to build a furnace.

The anchor member used in the lining brick for the converter throttle part according to the present invention is limited to the Y-type stud because it can be implemented at low cost and has the effect of preventing the lining brick for the converter throttle part from falling off. Because it is excellent, the work of locking to round steel or ring-shaped steel, which has been done conventionally, can be omitted, so the work can be simplified and simplified, and it is suitable for mechanization. is there. It should be noted that in the present invention, many modification examples in which the Y-stud has the same operational effect are conceivable, but all of them are within the scope of the present invention, and include, for example, a T-stud. . It is obvious to those skilled in the art that the same effect can be obtained.

The means for installing the Y-type stud on the iron skin and the inner lining brick for the converter narrowing part is not particularly limited, and any known appropriate means may be used. For example, it is possible to exemplify means for fixing to the iron shell by ordinary welding and fixing to the converter liner lining brick by anchor holes. However, the installation direction of the Y-type studs should be set so that the surface formed by the Y-type studs is almost vertical, considering that the falling direction of the liner bricks for the narrowing part of the converter is toward the center of the furnace. It is desirable to do. In addition, it is desirable to install the Y-type stud so that it projects about 40 to 70 mm from the side surface of the lining brick for the narrowing part of the converter in order to prevent the fall of the lining brick for the narrowing part of the converter. In addition, it is necessary to arrange the Y-type studs provided on the iron skin and the Y-type studs provided on the inner lining bricks for the converter drawing part in such a manner that they are alternately installed in the vertical direction, from the viewpoint of preventing the falling. Is more desirable.

From the above viewpoint, it is preferable that the distance between the inner surface of the iron shell of the converter and the inner brick for the narrowed part of the converter provided with the Y-type stud is 50 to 100 mm. The press-fitting and drying / heating of the irregular-shaped refractory are not limited in the present invention. Known amorphous refractories and methods may be used. According to the present invention configured as described above, in the furnace construction work, as in the above-described conventional technique, for example, one U-shaped hook member installed on the lining brick is formed into a ring-shaped steel material. Since it is not necessary to lock it on the work and the work is simplified and simplified, the workability is significantly improved. Therefore, it is possible to mechanize by utilizing a brick-laying machine.

Further, according to the present invention, according to the structure for preventing falling of the inner lining brick for the converter throttle part, Y-studs are provided from both the skin and the inner lining brick for the converter squeeze part, and an irregular shape is formed in the gap between them. The structure will be integrated for the construction of refractories, and it will be possible to greatly reduce or eliminate the falling of bricks in the narrowed part of the converter. Further, the present invention will be described with reference to the embodiments, but this is an example of the present invention, and the present invention is not limited thereto.

[0014]

【Example】

 In the converter having the cross section shown in FIG. 4, a plurality of converter brick lining bricks 2 according to the present invention are installed inside the iron shell 1 of the throttle part of the converter in a stacked manner. An amorphous refractory material 4 is filled between the skin 1 and the converter lining brick 2 for the throttle portion. In the present embodiment, as shown in FIG. 2, which is a schematic perspective view showing the inside of the iron shell 1 in an example of the present invention, a steel Y-type stud 3 is provided inside the iron shell 1 of the converter. Welded at intervals.

Further, as shown in FIGS. 3 (a) and 3 (b), which are schematic vertical sectional views and schematic top views of an example of a lining brick for a converter throttle portion according to the present invention, a side surface of the lining brick 2 is illustrated. 1 is a schematic vertical sectional view showing an example of the falling prevention structure of the liner brick for the narrowed part of the converter according to the present invention, as shown in FIG. 1. A furnace was built from No. 1 with a constant gap (50 to 100 mm), and an irregular shaped refractory was press-fitted into this gap to fill, dry and heat up.

According to the present invention, the time required for furnace construction is reduced to 4 hours, while the conventional furnace construction means shown in FIGS. 5 (a) and 5 (b) is 24 hours, for example. We were able to. Also, the work was extremely easy because there was no need to use the eyebolts and round steel that were used in the past. As described above, according to the present invention, the furnace construction work can be simplified and simplified to the extent that it can be carried out by a brick-laying machine, and mechanization can eliminate the brick-handling work.

Even when the converter brick to which the converter brick lining portion according to the present invention and the falling prevention structure thereof are applied is continuously used for 105 days under normal operating conditions, the lining brick for the converter throttle portion is used. The brick did not fall out. On the other hand, in the conventional converter lining brick for the throttle part shown in Fig. 5, the lining brick for the converter squeeze part fell off after continuous use for 15 days. From this, it is understood that the present invention can completely prevent the life of the converter from being reduced due to the falling of the lining brick for the narrowed part of the converter.

[0018]

[Effect of the device]

 As described above in detail, according to the present invention, the iron skin, the amorphous refractory, and the lining brick for the converter drawing part are integrated, so that the life of the converter can be extended and the converter drawing The construction of the furnace can be simplified and simplified to the extent that it can be carried out by a brick-laying machine. Specifically, the conventionally used eye bolts and round steel are not used. It became possible to provide the structure. The significance of the present invention having such an effect is extremely remarkable.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view showing an example of a fallout prevention structure for a lining brick for a converter throttle portion according to the present invention.

FIG. 2 is a schematic perspective view showing the inside of the iron shell 1 in an example of the present invention in an extracted part of a converter.

FIG. 3 (a) and FIG. 3 (b) are a schematic vertical sectional view and a schematic top view, respectively, of an example of a liner brick for a converter throttle unit according to the present invention.

FIG. 4 is a schematic vertical sectional view showing a furnace construction structure of a converter to which the present invention is applied.

[Fig. 5] Fig. 5 is a schematic explanatory view showing a structural example of a lining brick for a converter throttle part that is currently generally used, Fig. 5 (a) is a schematic perspective view thereof, and Fig. 5 (b) is It is an abbreviated explanatory drawing which extracts and shows 5 groups of lining bricks.

FIG. 6 is a vertical cross-sectional view showing an example of a lining brick proposed by JP-A-1-309915.

FIG. 7 is a schematic plan view showing an example of a lining brick proposed by JP-A-1-309915.

FIG. 8 is a vertical cross-sectional view showing a converter throttle portion drop-off prevention structure proposed by Japanese Patent Laid-Open No. 1-309915.

[Explanation of symbols]

1: Iron shell 2: Inner brick for converter drawing part 3: Y-type stud 4: Unshaped refractory 5: Inner brick for converter drawing part 6: Eyebolt 7: Iron skin 8: Support metal 9: Round steel 10: Converter furnace perm brick 11: Gap 12: Trigger hardware 13: Inner brick for converter throttle 14: Metal locking hole 15: Ring steel

Continuation of the front page (72) Kozo Shiraishi, No. 3 Hikari, Oshima, Kashima-machi, Kashima-gun, Kashima-gun, Ibaraki Sumitomo Metal Industries, Ltd. Kashima Works

Claims (2)

[Scope of utility model registration request] 1. A lining brick for a converter drawing part having a substantially parallelogram in a vertical cross section, which has a Y-type stud on a side surface thereof. 2. A structure for preventing falling of bricks for lining bricks for a narrowing part of a converter, comprising: (i) an iron shell of a converter having a Y-shaped stud inside, and (ii) a gap inside the iron shell. Along with that, the Y-type studs are arranged so as to be positioned on the iron skin side.
(Iii) A falling prevention structure for a liner brick for a converter drawing part, which further comprises (iii) an irregular shaped refractory filled in the gap.