CN216881691U

CN216881691U - Masonry structure of refractory material of working lining at bottom of molten iron tank

Info

Publication number: CN216881691U
Application number: CN202220026858.5U
Authority: CN
Inventors: 王朝晖; 张永刚; 白晓红
Original assignee: Anshan Iron And Steel Metallurgical Furnace Material Technology Co ltd
Current assignee: Anshan Iron And Steel Metallurgical Furnace Material Technology Co ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-07-05
Anticipated expiration: 2032-01-06

Abstract

The utility model relates to a masonry structure of a refractory material of a working lining at the bottom of a molten iron tank. The ladle bottom center brick is built at the center of a hot metal ladle, the building position of the cross-direction building brick is in a cross direction which is perpendicular to the center of the ladle bottom center brick, the oblique building brick I and the oblique building brick II are built at the included angle of the cross-direction building brick, and the oblique building brick I and the oblique building brick II are built in the perpendicular direction at each included angle. The utility model adopts four brick types and a cross method for building, each brick is provided with an inclined surface, and the bricks are obliquely built, so that the straight joint is reduced, and the phenomena of falling off and fracture of the bricks at the bottom of the tank are reduced.

Description

Masonry structure of refractory material of working lining at bottom of molten iron tank

Technical Field

The utility model relates to design of a shaped product of a refractory material used in steel smelting, in particular to a masonry structure of a refractory material of a working lining at the bottom of a molten iron tank.

Background

In the steel smelting process, high-temperature molten iron generated by a blast furnace is transported to a steel-making area from a torpedo ladle, folded into a molten iron ladle with a corresponding volume, desulfurized and the like in the molten iron ladle, and then added into a converter for smelting. The refractory material of the hot metal ladle mainly comprises a work lining shaping product, a permanent lining, an unshaped product at the position of a ladle opening and the like, and also comprises a heat insulation plate, cement gum and other auxiliary products.

The refractory for the hot metal ladle is mainly eroded by melting erosion and mechanical scouring of high-temperature molten iron and slag, and by scouring of gas and high-temperature molten iron during operations such as desulfurization. Meanwhile, the torpedo ladle has certain height difference when the torpedo ladle is folded into the molten iron ladle, and has larger impact on the bottom of the molten iron ladle, so that the working lining at the bottom of the molten iron ladle needs larger strength, and has higher requirements on the thermal shock stability and the volume change rate of a refractory material of the working lining at the bottom of the ladle.

The bottom of a traditional molten iron tank for a steel mill is flat, cuboid bricks are generally paved and vertically paved, the brick type is adopted for masonry, brick joints are straight joints, as shown in figure 1, when the volume change rate of the tank bottom bricks fluctuates, the brick joints are easy to expand, or the brick joints are aggravated by brick deformation, or the thermal shock stability of the tank bottom bricks fluctuates, the tank bottom bricks deform, so that the brick joints change, phenomena such as brick falling and the like of the molten iron tank in the operation process are easy to occur, along with the improvement of steel making capacity and the expansion of converter volume, the volume of the molten iron tank continuously expands, the bottom of the molten iron tank expands, refractory brick types are restricted by production and masonry conditions and cannot change along with the brick joints, the brick falling phenomenon of the bottom of the molten iron tank increases relatively, and the use safety and service life of the molten iron tank are greatly influenced.

For example, the vertical bricks at the bottom of the ladle of a certain steel mill are 100 × 200 × 300mm rectangular bricks, the single weight is about 17.5kg, the using amount of the bricks on a 200-ton ladle is about 500, the diameter of the ladle is about 3360mm, the using amount of the bricks on a 260-ton ladle is about 570, the diameter of the ladle is about 4080mm, and brick joints corresponding to 70 bricks are added.

In order to improve the phenomenon that bottom bricks of a hot metal ladle fall off and improve the stability, safety and service life of the hot metal ladle in use, a novel masonry structure is designed to avoid straight joints, so that the phenomenon that the bottom bricks of the ladle fall off and break due to the change of the thermal expansibility of refractory bricks or the erosion of molten iron to gaps is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a masonry structure of a refractory material of a working lining at the bottom of a ladle, which is constructed by adopting four brick types and a cross method, each brick is provided with an inclined surface, and the bricks are obliquely laid, so that straight seams are reduced, and the phenomena of falling off and fracture of the bricks at the bottom of the ladle are reduced.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a building structure of a refractory material of a working lining at the bottom of a molten iron tank is characterized in that the molten iron tank is a flat-bottom molten iron tank, and bricks are obliquely built.

The ladle bottom center brick is built in the center of a molten iron ladle, the building position of the cross-direction building brick is in the cross direction with the ladle bottom center brick as the center and perpendicular to each other, the inclined building brick I and the inclined building brick II are built at the included angle of the cross-direction building brick, and the inclined building brick I and the inclined building brick II are built in the perpendicular direction at each included angle.

The tank bottom center brick is in a regular quadrangular frustum pyramid shape.

The main view direction of the cross-direction masonry brick is a trapezoidal surface, the shape of the trapezoidal surface is consistent with that of the trapezoidal side surface of the tank bottom center brick, the side view direction of the cross-direction masonry brick is a parallelogram surface inclined to one side, and the inclination angle is consistent with that of the side surface of the tank bottom center brick.

The main view direction of the oblique masonry brick I is a parallelogram surface inclined to one side, the side view direction of the oblique masonry brick I is also a parallelogram surface inclined to one side, and the inclination angles of the two parallelogram surfaces of the oblique masonry brick I are consistent with the inclination angle of the side surface of the central brick at the bottom of the tank;

the main view direction of the oblique masonry brick II is a parallelogram surface inclined to one side, the side view direction of the oblique masonry brick II is also a parallelogram surface inclined to one side, and the inclination angles of the two parallelogram surfaces of the oblique masonry brick II are consistent with the inclination angle of the side surface of the central brick at the bottom of the tank;

when the oblique masonry brick I and the oblique masonry brick II are in the side viewing direction, the oblique directions of the two faces are opposite.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model changes the straight seam formed by building the refractory bricks at the bottom of the flat-bottom hot metal ladle into the oblique seam by modifying the brick shape of the bottom bricks of the hot metal ladle in a steel plant, and mainly solves the problem of brick falling at the bottom of the hot metal ladle in the using process. The beneficial effects are mainly embodied in the following points:

(1) because the inclined brick joints are adopted, an effective extrusion effect is formed between the bricks, and the phenomenon that the bottom bricks of the hot-metal ladle are easy to fall off is improved;

(2) the inclined brick joints are adopted, and the phenomenon that molten iron enters the bottom of the tank bottom brick along the brick joints to form iron clamping is weakened;

(3) the inclined brick joints are adopted, so that the influence of the volume change of the refractory bricks due to heating in the using process on the bricks is also relieved, and the phenomenon of brick breakage is reduced.

Drawings

FIG. 1 is a prior art ladle bottom brick masonry.

Fig. 2 is a front view of a central brick of the can bottom.

Fig. 3 is a top view of a can bottom center block.

Figure 4 is a front view of a cross-oriented masonry brick.

Figure 5 is a side view of a cross-orientation masonry brick.

Figure 6 is a top plan view of a cross-orientation masonry brick.

Fig. 7 is a front view of an inclined masonry brick i.

Fig. 8 is a side view of the diagonal masonry brick i.

Fig. 9 is a plan view of the slant masonry brick i.

Fig. 10 is a front view of the diagonal masonry brick ii.

FIG. 11 is a side view of the slant masonry brick II

Fig. 12 is a plan view of the diagonal masonry brick ii.

FIG. 13 is a ladle bottom brick masonry structure for a hot metal ladle of the present invention.

FIG. 14 is a cross-sectional view of a brick masonry for a ladle bottom of the hot metal ladle of the present invention.

In the figure: 1-tank bottom center brick, 2-cross azimuth masonry brick, 3-oblique masonry brick I and 4-oblique masonry brick II.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 2-14, the masonry structure of the refractory material of the working lining at the bottom of the ladle is a flat-bottom ladle, and bricks are obliquely laid between the bricks.

The ladle bottom center brick is built at the center of a molten iron ladle, the building position of the cross-direction building brick 2 is in a cross direction which is perpendicular to the ladle bottom center brick 1 and takes the ladle bottom center brick 1 as the center, the oblique building brick I3 and the oblique building brick II 4 are built at an included angle of the cross-direction building brick 2, and the oblique building brick I and the oblique building brick II are built in a mutually perpendicular direction at each included angle.

The tank bottom center brick 1 is in a regular quadrangular frustum pyramid shape.

The main view direction of the cross-shaped position masonry brick 2 is a trapezoidal surface, the shape of the trapezoidal surface is consistent with that of the trapezoidal side surface of the tank bottom center brick 1, the side view direction of the cross-shaped position masonry brick 2 is a parallelogram surface inclined to one side, and the inclination angle is consistent with that of the side surface of the tank bottom center brick 1.

The main view direction of the oblique masonry brick I3 is a parallelogram face inclined to one side, the side view direction of the oblique masonry brick I3 is also a parallelogram face inclined to one side, and the inclination angles of two parallelogram faces of the oblique masonry brick I3 are consistent with the inclination angle of the side face of the central brick 1 at the bottom of the tank;

the main view direction of the oblique masonry brick II 4 is a parallelogram plane inclined to one side, the side view direction of the oblique masonry brick II 4 is also a parallelogram plane inclined to one side, and the inclination angles of two parallelogram planes of the oblique masonry brick II 4 are consistent with the inclination angle of the side face of the tank bottom central brick 1;

when the oblique masonry brick I3 and the oblique masonry brick II 4 are in side view directions, the oblique directions of the two faces are opposite.

The masonry method comprises the following steps:

1) after the bottom level of the flat-bottom hot metal ladle is leveled, a ladle bottom central brick 1 is placed at the central point of the ladle bottom, and then a cross-shaped position masonry brick 2 is respectively constructed in four directions of the ladle bottom central brick 5 by using cement;

2) taking the built tank bottom center brick 1 and the cross-shaped position building brick 2 as centers, and building the cross-shaped position building brick 2 block by using cement along four vertical directions;

3) after the cross-direction masonry brick 2 is built, sequentially building an oblique masonry brick I3 and an oblique masonry brick II 4 in a herringbone manner by using cement along the direction of the inclined plane of the cross-direction masonry brick 2;

4) all the brick shapes are built to the edge of the tank bottom, and the building is completed after the brick shapes are tightly squeezed, and the building is shown in a figure 13.

After the brick type adopting the scheme of the utility model is built on a 260-ton flat-bottom hot metal ladle in a certain steel mill, brick falling is not easy to occur in the using process, the thickness of the residual brick at the bottom of the ladle meets the using requirement of the steel mill after the ladle is in service (about 1020 times), the phenomena of brick falling and brick breaking do not occur in the whole process, and the phenomenon of steel drilling at the bottom of the ladle is also improved.

Claims

1. A masonry structure of a refractory material of a working lining at the bottom of a molten iron tank is characterized in that the molten iron tank is a flat-bottom molten iron tank, and bricks are obliquely laid between the bricks.

2. The masonry structure of the refractory of the working lining of the bottom of the molten iron tank according to claim 1, which comprises a central brick of the tank bottom, a cross-direction masonry brick, an oblique masonry brick I and an oblique masonry brick II, wherein the central brick of the tank bottom is masonry-arranged at the central position of the molten iron tank, the masonry position of the cross-direction masonry brick is in a cross direction which is perpendicular to each other with the central brick of the tank bottom as the center, the oblique masonry brick I and the oblique masonry brick II are masonry-arranged at the included angle of the cross-direction masonry brick, and the oblique masonry brick I and the oblique masonry brick II are masonry-arranged at each included angle in a perpendicular direction.

3. The masonry structure of refractory working lining at the bottom of a ladle according to claim 2, wherein the central brick at the bottom of the ladle is in the shape of a regular quadrangular frustum of a pyramid.

4. The masonry structure of the working lining refractory at the bottom of the molten iron tank according to claim 2 or 3, wherein the cross-oriented masonry brick is trapezoidal in the main view direction, the trapezoidal shape is consistent with the trapezoidal shape of the side face of the central brick at the bottom of the tank, the cross-oriented masonry brick is parallelogram-shaped in the side view direction, and the inclination angle is consistent with the inclination angle of the side face of the central brick at the bottom of the tank.

5. The masonry structure of the working lining refractory of the bottom of the molten iron tank according to the claim 2 or 3, characterized in that the main view direction of the oblique masonry brick I is a parallelogram plane inclined to one side, the side view direction of the oblique masonry brick I is also a parallelogram plane inclined to one side, and the inclination angles of the two parallelogram planes of the oblique masonry brick I are consistent with the inclination angle of the side surface of the central brick of the bottom of the tank;