CN214991682U

CN214991682U - Fastening brick for converter bottom corner position

Info

Publication number: CN214991682U
Application number: CN202120568485.XU
Authority: CN
Inventors: 唐明辉; 曾炳俊; 巢强; 陈宇
Original assignee: Wuhan Jingding Technology Co ltd
Current assignee: Wuhan Jingding Technology Co ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-12-03
Anticipated expiration: 2031-03-19

Abstract

The utility model provides a fastening brick for a converter bottom corner position. The fastening brick is positioned at the corner part of a permanent layer at the bottom of the converter and is formed by enclosing the top surface and the bottom surface of an isosceles trapezoid, a vertical side surface, an inclined side surface, a front side surface and a rear side surface, the top surface and the bottom surface of the isosceles trapezoid are two isosceles trapezoid surfaces with equal upper and lower bottom edges and unequal heights, the top surface is higher than the bottom surface, and the inclined side surface is positioned between the long bottom edges of the two isosceles trapezoid surfaces; the inclined angle of the inclined side face is the same as the inclined angle of the converter steel shell at the corner position of the converter bottom, the inclined side face is tightly attached to the converter steel shell during installation, and the top face of the fastening brick is tightly attached to the bottom face of the working layer at the blank pressing position of the converter bottom. The utility model provides a building the problem by laying bricks or stones of the permanent layer at corner position, other regions directly adopt standard magnesia brick to build by laying bricks or stones, have reduced the mortar joint and have built by laying bricks or stones the use amount of the scattered form material in position, have strengthened the physical stability of resistant material structure, have weakened the influence of gas leakage phenomenon to resistant material.

Description

Fastening brick for converter bottom corner position

Technical Field

The utility model belongs to the technical field of the refractory material of the converter lining in the metallurgical industry, in particular to a fastening brick for the corner position of the converter bottom.

Background

At the present stage, in the design and installation process of the converter at home and abroad, the permanent layer at the corner part of the steel structure of the converter bottom is designed to be built by magnesium bricks, because the part is of a special-shaped structure and has a longer depth in the vertical direction, a large amount of small magnesium bricks are needed in the building process, and the gaps of the magnesium bricks are filled by scattered ramming materials, so that a large amount of brick seams and scattered materials exist at the bottom of the converter, the strength of the refractory materials at the converter bottom is weakened, and the structural stability is reduced.

The bottom of the converter is provided with a certain number of air brick tubes, and the air brick tubes are required to be reshaped on site because the air brick positioning and the equipment opening are not at ideal positions during installation, but the effective air permeable area of the air brick tubes is easily reduced in the reshaping process on site, and micro cracks invisible to naked eyes are easily generated; the micro-cracks continuously receive cold and hot impact during the period of the furnace service, the micro-cracks are gradually expanded to generate air leakage and reduce the ventilation air pressure, in order to meet the normal production of the converter, the air pressure has to be increased to cause vicious circle, so that the air flow borne by the refractory layer at the bottom of the furnace is continuously enhanced. Because the corner part uses a large amount of small magnesia bricks, the mortar joints are more, the using amount of the bulk materials is larger, and the bulk materials can be firstly damaged when being washed by air flow, thereby reducing the structural stability of the refractory material at the bottom of the furnace. After the air current is washed for a long time, refractory materials at the bottom of the converter loosen along with actions such as normal dumping during the production of the converter, and partial positions of the refractory materials also generate a cavity phenomenon, thereby causing fatal threat to the normal production of the converter.

At present, in order to avoid the danger of the damage of the bottom of the converter, each converter needs to be overhauled for at least 2-3 times during the campaign period to deal with the threat, the overhaul time period is about 40 hours each time, and the consumed refractory material is about 20 tons. A converter with 1 ton per year will therefore reduce the capacity by at least 1200 tons, directly reducing the benefit of the steel mill by about 300 million RMB.

Disclosure of Invention

The utility model provides a not enough according to prior art for a fastening brick at converter bottom corner position, this fastening brick forms according to converter type special design to fastening brick and standard magnesia brick replace the fritter magnesia brick, reduce the packing volume of grey seam quantity and bulk material, make the firebrick build by laying bricks or stones and level, thereby reach the purpose that increases the resistant material structural strength at converter bottom corner position.

In order to achieve the technical purpose, the utility model provides a fastening brick for the corner part of the converter bottom; the fastening brick is positioned at the corner part of the permanent layer of the converter bottom, and is an irregular cube formed by enclosing an isosceles trapezoid top surface, an isosceles trapezoid bottom surface, a vertical side surface, an inclined side surface, a front side surface and a rear side surface; the isosceles trapezoid top surface and the isosceles trapezoid bottom surface are two isosceles trapezoid surfaces with equal upper and lower bottom edges and unequal heights, the height of the isosceles trapezoid top surface is greater than that of the isosceles trapezoid bottom surface, the vertical side surface is positioned between the short bottom edges of the two isosceles trapezoid surfaces, and the oblique side surface is positioned between the long bottom edges of the two isosceles trapezoid surfaces; the inclined angle of the inclined side face is the same as that of the inclined face of the converter steel shell at the corner position of the converter bottom, when the fastening brick is arranged at the corner position of the permanent layer of the converter bottom, the inclined side face is tightly attached to the converter steel shell, and the top face of the fastening brick is tightly attached to the bottom face of the working layer of the blank pressing position of the converter bottom.

The utility model discloses better technical scheme: the fastening bricks are carbon magnesia bricks, and the horizontal length of the fastening bricks extends to the joint part of the working layer of the blank pressing part of the furnace bottom and the working layer of the furnace bottom.

The utility model discloses further technical scheme: the converter bottom permanent layer bottom forms the screed-coat through the ramming material to build permanent layer magnesia brick on the screed-coat, form converter bottom permanent layer through permanent layer magnesia brick and fastening brick zonulae occludens, the gap between permanent layer magnesia brick and the bottom working layer is closely knit through the ramming material packing.

The utility model discloses better technical scheme: the working layer of the blank pressing part of the furnace bottom is formed by cutting standard magnesia carbon bricks, and the joint part of the brick body and the steel shell of the converter is tightly filled with a ramming material.

The utility model discloses better technical scheme: the size of the fastening brick is matched with the radius of the converter body.

The utility model discloses a fastening brick sets up to the inclined plane with the oven assorted on the one side that closes on the oven, fastening brick installs at the corner position of stove bottom working layer and stove bottom blank pressing position working layer bottom, its inclined plane just hugs closely with oven corner position, the masonry problem of the permanent layer at corner position has been solved, other regions directly adopt standard magnesia brick to build by laying bricks or stones, the use amount of the loose material of mortar joint and building position has been reduced, the physical stability of refractory material structure has been strengthened, the influence of gas leakage phenomenon to the refractory material has been weakened, 1-2 times of maintenance time of converter has been reduced every year, maintenance time has been reduced 3-5 hours on a year basis; the efficiency can be increased by nearly 300 ten thousand only in the campaign period of 1 year for each 100 ton converter.

Drawings

Fig. 1 and fig. 2 are schematic perspective views of different angles of the fastening brick of the present invention;

FIG. 3 is a schematic front view of a fastening brick according to the present invention;

FIG. 4 is a schematic view of the vertical side of the fastening brick of the present invention;

FIG. 5 is a top view of the fastening brick of the present invention;

FIG. 6 is a schematic view of the installation of the fastening brick of the present invention;

FIG. 7 is a schematic view showing the original structure of a corner portion of the bottom of a converter.

In the figure: 1-fastening brick, 100-isosceles trapezoid top surface, 101-isosceles trapezoid bottom surface, 102-oblique side surface, 103-front side surface, 104-rear side surface, 105-vertical side surface, 2-converter steel shell, 3-furnace bottom blank pressing part working layer, 4-leveling layer, 5-permanent layer magnesium brick, 6-furnace bottom working layer, A-converter corner part, 7-small magnesium brick, 8-air brick and 9-air brick pipe.

Detailed Description

The present invention will be further explained with reference to the drawings and examples. Fig. 1 to 6 are drawings of the embodiment, which are drawn in a simplified manner and are only used for clearly and concisely illustrating the purpose of the embodiment of the present invention. The following detailed description of the embodiments of the present invention is presented in the drawings and is not intended to limit the scope of the invention as claimed. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The embodiment provides a fastening brick for a corner part of the bottom of a converter, as shown in fig. 1 to 5, the fastening brick 1 is positioned at the corner part of a permanent layer of the bottom of the converter, the fastening brick 1 is an irregular cube formed by enclosing an isosceles trapezoid top surface 100, an isosceles trapezoid bottom surface 101, a vertical side surface 105, an inclined side surface 102, a front side surface 103 and a rear side surface 104, and the material is completely the same as that of a carbon magnesia brick; the isosceles trapezoid top surface 100 and the isosceles trapezoid bottom surface 101 are two isosceles trapezoid surfaces with equal upper and lower bottom edges and unequal heights, the isosceles trapezoid top surface 100 is higher than the isosceles trapezoid bottom surface 101, the vertical side surface 105 is located between the short bottom edges of the two isosceles trapezoid surfaces, and the inclined side surface 102 is located between the long bottom edges of the two isosceles trapezoid surfaces; the inclined side surface 102 has the same inclination angle as the inclined surface of the converter steel shell 2 at the corner of the converter bottom, and when the fastening brick 1 is installed at the corner of the permanent layer of the converter bottom, as shown in fig. 6, the inclined side surface 102 is closely attached to the converter steel shell 2, the top surface of the fastening brick 1 is closely attached to the bottom surface of the working layer 3 at the blank pressing position of the converter bottom, and the horizontal length thereof extends to the joint of the working layer 3 at the blank pressing position of the converter bottom and the working layer 6 of the converter bottom. The size of the fastening brick 1 is matched with the radius of the converter body.

In the embodiment of the fastening brick for the corner part of the converter bottom, as shown in fig. 6, the leveling layer 4 is formed at the bottom of the permanent layer of the converter bottom through a ramming material, the magnesium brick 5 of the permanent layer is built on the leveling layer 4, the permanent layer of the converter bottom is formed by tightly connecting the magnesium brick 5 of the permanent layer and the fastening brick 1, and the gap between the magnesium brick 5 of the permanent layer and the working layer 6 of the converter bottom is tightly filled through the ramming material. The working layer 3 at the blank pressing part of the furnace bottom is formed by cutting standard magnesia carbon bricks, and the joint part of the brick body and the steel shell 2 of the converter is tightly filled with ramming mass.

The utility model discloses a 1 size of fastening brick of converter specifically confirms according to the actual radius size of converter and the actual depth at this position, adopt the coal brick, in the work progress, begin to use the form ramming mass that looses from the stove bottom to make level, make refractory material firebrick can carry out the level and build by laying bricks or stones, after leveling 4 construction is accomplished, use standard magnesia brick to build by laying bricks or stones permanent layer to converter corner position time, just use fastening brick 1 to build by laying bricks or stones, it is specifically as shown in figure 6, when building fastening brick 1 by laying bricks or stones, the inner wall of the rigid shell 2 of converter is hugged closely to the skew side 102 of fastening brick 1, then begin to build by laying bricks or stones stove bottom blank pressing position working layer 3 and stove bottom working layer 6, blank pressing position working layer 3 sticiss in fastening brick 1 top, stove bottom blank pressing position working layer 3 adopts the cutting of standard carbon magnesia brick to form, it adopts the ramming mass to fill with converter shell 2 contact gaps.

The converter is constructed through a concrete test of the structure, so that the overhaul time of 1-2 converters is reduced every year, and the overhaul time is reduced by 3-5 hours in each time; the efficiency can be increased by nearly 300 ten thousand only in the campaign period of 1 year for each 100 ton converter.

The above description is only one embodiment of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a fastening brick for converter bottom corner position which characterized in that: the fastening brick (1) is positioned at a corner part of a permanent layer of the converter bottom, and the fastening brick (1) is an irregular cube formed by enclosing an isosceles trapezoid top surface (100), an isosceles trapezoid bottom surface (101), a vertical side surface (105), an inclined side surface (102), a front side surface (103) and a rear side surface (104); the isosceles trapezoid top surface (100) and the isosceles trapezoid bottom surface (101) are two isosceles trapezoid surfaces with equal upper and lower bottom edges and unequal heights, the isosceles trapezoid top surface (100) is higher than the isosceles trapezoid bottom surface (101), the vertical side surface (105) is positioned between the short bottom edges of the two isosceles trapezoid surfaces, and the inclined side surface (102) is positioned between the long bottom edges of the two isosceles trapezoid surfaces; the inclined angle of the inclined side surface (102) is the same as the inclined angle of the inclined surface of the converter steel shell (2) at the corner position of the converter bottom, when the fastening brick (1) is installed at the corner position of the converter bottom permanent layer, the inclined side surface (102) is tightly attached to the converter steel shell (2), and the top surface of the fastening brick (1) is tightly attached to the bottom surface of the converter bottom pressing position working layer (3).

2. The fastening brick for the corner part of the converter bottom according to claim 1, characterized in that: the fastening bricks (1) are carbon magnesia bricks, and the horizontal length of the fastening bricks extends to the joint part of the furnace bottom blank pressing part working layer (3) and the furnace bottom working layer (6).

3. The fastening brick for the corner part of the converter bottom according to claim 1 or 2, characterized in that: the converter bottom permanent layer bottom forms screed-coat (4) through the ramming material to build permanent layer magnesia brick (5) on screed-coat (4), form converter bottom permanent layer through permanent layer magnesia brick (5) and fastening brick (1) zonulae occludens, and the gap between permanent layer magnesia brick (5) and bottom working layer (6) is closely knit through the ramming material packing.

4. The fastening brick for the corner part of the converter bottom according to claim 1 or 2, characterized in that: the working layer (3) at the blank pressing part of the furnace bottom is formed by cutting standard magnesia carbon bricks, and the joint part of the brick body and the steel shell (2) of the converter is densely filled with ramming materials.

5. The fastening brick for the corner part of the converter bottom according to claim 1 or 2, characterized in that: the size of the fastening brick (1) is matched with the radius of the converter body.