Steel ladle with asymmetric four-bottom-blowing breathable core

Abstract

The utility model relates to a steel ladle with an asymmetric four-bottom-blowing breathable core, which comprises a steel ladle body, and two breathable bricks, namely a first breathable brick and a second breathable brick, are arranged at the bottom of the steel ladle body; a first air-permeable core and a second air-permeable core are arranged on the first air-permeable brick, a third air-permeable core and a fourth air-permeable core are arranged on the second air-permeable brick, the first air-permeable core and the second air-permeable core are asymmetrically arranged on the first air-permeable brick, and the third air-permeable core and the fourth air-permeable core are asymmetrically arranged on the second air-permeable brick; the centers of the first ventilation core, the second ventilation core, the third ventilation core and the fourth ventilation core are clockwise distributed on a concentric circle by taking one point on the center line of the steel ladle body as a circle center; the center line of the second breathable core is perpendicular to the center line of the third breathable core. According to the utility model, the service life of the ventilating core is prolonged while the same stirring and impurity removing effects as those of the traditional steel ladle are ensured.

Description

Technical Field

[0001] The utility model relates to a ladle with an asymmetric four-bottom blowing breathable core, belonging to the technical field of breathable bricks used in ladles. Background Technique

[0002] After the molten steel pouring is completed, the ladle is lifted off the large ladle turntable of the casting machine, and the residual molten steel and slag at the bottom are poured out. Subsequently, the empty ladle is transported to the ladle tilting machine for related operations, such as cleaning the breathable brick, installing the slide plate, and pouring the drainage sand; the ladle is rotated to a horizontal position by the ladle tilting machine, and then, the oxygen pipeline is opened, and oxygen is blown into the breathable brick at the bottom of the ladle. The oxygen will react with the residual molten steel and slag adhered to the surface of the breathable brick and melt it; when using the oxygen pipeline to clean the surface of the breathable brick and confirm that there is no residue or residual steel, to protect the breathable brick, compressed air or nitrogen is used to perform a final purge on the breathable brick. After cleaning the residual steel at the nozzle, the ladle opening is blocked by a fire door, and then the compressed air pipe is connected to the ladle bottom, and the compressed air is turned on to check whether there is air leakage or damage in the bottom blowing system and whether the connection is firm.

[0003] Obviously, the bottom blowing breathable brick of the ladle plays a very important role in the steelmaking process. Specifically, it promotes the mass transfer and heat transfer inside the molten steel, makes the composition of the molten steel more uniform, and the temperature distribution more consistent; drives the flow of the molten steel, promotes the floating of inclusions and their absorption by the slag layer; provides good kinetic conditions for various chemical reactions in the molten steel.

[0004] Analyzing the traditional ladle bottom blowing breathable brick, it is a bottom blowing breathable brick using a single breathable core. After using <40 furnaces, the ladle bottom blowing breathable brick needs to be removed and a new one needs to be reinstalled, resulting in frequent ladle return to the factory for repair and short service life of the breathable core. There are also examples of using double-breathable-core bottom blowing breathable bricks in the prior art. For example, the utility model with the application number 202322966940.3 provides a breathable brick with a double air supply channel, which includes a seat brick, and a first brick core and a second brick core are fixedly embedded inside the seat brick. A first air inlet pipe is fixedly installed at the bottom end of the first brick core, a second air inlet pipe is fixedly installed at the bottom end of the second brick core, one ends of the first air inlet pipe and the second air inlet pipe are fixedly connected to the same adjusting pipe, and a main air delivery pipe is fixedly connected to the central position of the adjusting pipe. In this utility model, the dual-channel breathable brick can complete the switching and use of the breathable brick without stopping multiple devices, with simple operation and improved work efficiency. However, the so-called double air supply channel breathable brick also adopts the same symmetrical breathable brick structure (as Figure 1a shown), resulting in a change in the stirring position of the bottom blowing gas of the ladle in the molten steel after switching, changing the flow field of the ladle liquid, and being unfavorable for the steel slag stirring reaction and the floating and removal of inclusions. If a symmetrical breathable brick is selected (such as Figure 1bAs shown in the figure, if all the breathable cores are placed on the same circle, then the entire breathable brick needs to be placed obliquely. However, the refractory bricks at the bottom of the ladle are laid horizontally. Figure 1b This structure increases the difficulty and complexity of masonry and is not conducive to the ladle masonry.

[0005] Therefore, there is an urgent need to design a new breathable brick and apply it to the ladle to solve the above problems. Utility Model Content

[0006] The utility model provides a ladle with an asymmetric four-bottom blowing breathable core, which prolongs the service life of the breathable core while ensuring the same stirring and impurity removal effects as the traditional ladle.

[0007] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0008] A ladle with an asymmetric four-bottom blowing breathable core includes a ladle body. Two breathable bricks are arranged at the bottom of the ladle body, namely a first breathable brick and a second breathable brick;

[0009] A first breathable core and a second breathable core are arranged on the first breathable brick, and a third breathable core and a fourth breathable core are arranged on the second breathable brick. The first breathable core and the second breathable core are not symmetrically arranged on the first breathable brick, and the third breathable core and the fourth breathable core are not symmetrically arranged on the second breathable brick;

[0010] Taking a point on the center line of the ladle body as the center of the circle, the centers of the first breathable core, the second breathable core, the third breathable core and the fourth breathable core are arranged clockwise on a concentric circle;

[0011] The center line of the second breathable core is perpendicular to the center line of the third breathable core;

[0012] Further, on the formed concentric circle, the included angle formed between the first breathable core and the third breathable core is The included angle formed between the second breathable core and the fourth breathable core is

[0013] Further, during the production process, the first breathable core and the third breathable core are used simultaneously, and the second breathable core and the fourth breathable core are used simultaneously.

[0014] Through the above technical solutions, compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. For the ladle with an asymmetric four-bottom blowing breathable core provided by the utility model, after the service lives of the two breathable cores used simultaneously in the actual production process end, there is no need to take the ladle offline to replace the breathable bricks again. Only by switching the bottom blowing air pipeline interface, the other two breathable cores can be continued to be used, thus prolonging the service life of the breathable bricks;

[0016] 2. For the ladle with an asymmetric four-bottom blowing breathable core provided by the present utility model, when the second group of breathable cores is used, the flow field of the bottom blowing gas is the same as that when the first group of breathable cores is used, ensuring the same effects of stirring molten steel by bottom blowing and removing inclusions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0018] Figure 1a is a schematic structural diagram of the same symmetric breathable brick in the prior art;

[0019] Figure 1b is a schematic structural diagram of a symmetric breathable brick in the prior art;

[0020] Figure 2 is a schematic structural diagram of a preferred embodiment provided by the present utility model.

[0021] In the figure: 1 is the first breathable brick, 11 is the first breathable core, 12 is the second breathable core, 2 is the second breathable brick, 21 is the third breathable core, and 22 is the fourth breathable core. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will now be further described in detail in conjunction with the drawings. In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper part", "lower part", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of components, so they cannot be understood as limitations to the present utility model. The specific dimensions adopted in this embodiment are only for illustrating the technical solution and do not limit the protection scope of the present utility model.

[0023] In order to overcome the problems in the background art, the present application provides a ladle with an asymmetric four-bottom blowing breathable core. Compared with the traditional ladle that uses two symmetrically designed breathable bricks of the same type ( Figure 1a ), or two breathable bricks arranged symmetrically ( Figure 1b ), the breathable cores on the two breathable bricks provided by the present utility model are not symmetric.

[0024] Such as Figure 2As shown, the two permeable bricks are respectively defined as the first permeable brick 1 and the second permeable brick 2; a first permeable core 11 and a second permeable core 12 are arranged on the first permeable brick, and a third permeable core 21 and a fourth permeable core 22 are arranged on the second permeable brick, that is, there are four permeable cores at the bottom of the ladle body. Obviously, the first permeable core and the second permeable core are not symmetrically arranged on the first permeable brick, and the third permeable core and the fourth permeable core are not symmetrically arranged on the second permeable brick either.

[0025] In the actual production process, the first permeable core and the third permeable core are used simultaneously, and the second permeable core and the fourth permeable core are used simultaneously. As two permeable core groups, if the gas blowing angle does not change when immediately switching to the second permeable core group after the bottom blowing life of the first permeable core group ends, it is required that the centers of the first permeable core, the second permeable core, the third permeable core, and the fourth permeable core in the two permeable core groups are arranged clockwise on the same concentric circle, that is, the four permeable cores are located on the same concentric circle, and the included angle formed between the first permeable core and the third permeable core is The included angle formed between the second permeable core and the fourth permeable core is And the center line of the second permeable core is perpendicular to the center line of the third permeable core.

[0026] This design enables, after the service lives of the two simultaneously used permeable cores (the first permeable core and the third permeable core) in the production process are up, without taking the ladle offline to replace the permeable bricks, only by switching the bottom blowing gas pipeline interface, the remaining two permeable cores (the second permeable core and the fourth permeable core) can be continued to be used; due to the included angle and the included angle being the same and on the concentric circle, then when switching the bottom blowing gas pipeline interface, the bottom blowing flow fields of the two permeable cores (the second permeable core and the fourth permeable core) are the same as those of the two permeable cores (the first permeable core and the third permeable core), ensuring the same bottom blowing and permeable steel liquid stirring and inclusion removal effects.

[0027] Verified by practice, for the ladle with the asymmetric four-bottom blowing permeable cores provided by this application, while ensuring different bottom blowing and permeable stirring flow fields of the ladle bottom, it can indirectly extend the service life of the bottom blowing permeable bricks (halving the number of times of replacing the permeable bricks), thereby reducing the ladle temperature drop caused by taking the ladle offline to replace the permeable bricks. Then, using gas to burn and bake the ladle saves energy and realizes carbon emission reduction. At the same time, due to reducing the ladle offline, the total number of ladles for production preparation can be reduced, further reducing the manual labor intensity.

[0028] Those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the field to which this application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as such herein.

[0029] As used in this application, the meaning of "and / or" includes both the case of each existing separately and the case of both existing simultaneously.

[0030] As used in this application, the meaning of "connection" can be a direct connection between components or an indirect connection between components through other components.

[0031] Taking the above-mentioned ideal embodiments of the present utility model as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A ladle with an asymmetric four-bottom blowing permeable core, comprising a ladle body, characterized in that: Two tuyere bricks are arranged at the bottom of the ladle body, namely the first tuyere brick and the second tuyere brick; A first tuyere core and a second tuyere core are arranged on the first tuyere brick, and a third tuyere core and a fourth tuyere core are arranged on the second tuyere brick. The first tuyere core and the second tuyere core are not symmetrically arranged on the first tuyere brick, and the third tuyere core and the fourth tuyere core are not symmetrically arranged on the second tuyere brick; Taking a point on the center line of the ladle body as the center of a circle, the centers of the first tuyere core, the second tuyere core, the third tuyere core and the fourth tuyere core are arranged clockwise on a concentric circle; The center line of the second tuyere core is perpendicular to the center line of the third tuyere core.

2. The ladle with an asymmetric four-bottom blowing permeable core according to claim 1, characterized in that: On the formed concentric circles, the included angle formed between the first air-permeable core and the third air-permeable core is The included angle formed between the second air-permeable core and the fourth air-permeable core is 3. The ladle with an asymmetric four-bottom blowing permeable core according to claim 1, characterized in that: During the production process, the first tuyere core and the third tuyere core are used simultaneously, and the second tuyere core and the fourth tuyere core are used simultaneously.

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