Steel ladle bottom air brick

Abstract

The utility model relates to the technical field of steel processing, in particular to a steel ladle bottom air brick which comprises a shell, a main core body structure is arranged in the shell, the main core body structure comprises a compact body and ceramic rods, a plurality of through holes are formed in the compact body, and the ceramic rods correspond to the through holes one by one. The through holes are annularly and radially distributed in the compact body, the ceramic rods are inserted into the through holes, and the diameter of each ceramic rod is smaller than the aperture of the inner wall of the corresponding through hole, so that an annular gap is formed between each ceramic rod and the compact body, and partitions for extending of the compact body are formed in the annular gaps, so that the annular gaps form a multi-section structure; the air chamber is welded to the bottom of the shell in a sealed mode, the interior of the air chamber communicates with the annular gap, and the air chamber is used for evenly distributing purging gas to the annular gap; the blowing pipe is arranged at the bottom of the air chamber and used for conveying blowing gas into the air chamber, so that direct circulation of the blowing gas in the air chamber is avoided, pressure fluctuation in the gas flowing process is reduced, and gas distribution uniformity is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel processing technical field, concretely provides a kind of ladle bottom air brick. BACKGROUND

[0002] The diffused air brick applied in market has unique advantage in removing inclusion, bubble is uniform, independent, small, but diffuser is not resistant to flushing and small in air volume, so relatively lower in life;And widely applied slit type air brick has the characteristics of large air volume and resistance to purging, but it is difficult to purge, time-consuming, and large amount of purging smoke is generated, thereby increasing the disturbance of on-site hot repair.

[0003] Correspondingly, the prior art needs a new ladle bottom air brick to solve the above technical problems. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving above-mentioned technical problem, that is, solve the problem of uneven and unstable air volume of existing air brick.

[0005] The utility model provides a kind of ladle bottom air brick, the air brick includes:

[0006] Shell, the shell inside is provided with main core structure, the main core structure includes the compact body that is formed with multiple through holes and the ceramic rod that is corresponded with multiple through holes, the through hole is formed along annular radial distribution on the compact body, the ceramic rod is inserted in the through hole, and the ceramic rod diameter is less than the through hole inner wall aperture, to form annular gap between the ceramic rod and the compact body, the annular gap is formed with the partition of the compact body extension, to form multiple section structure in the annular gap;

[0007] Gas chamber, the gas chamber is closed and welded in the shell bottom, the gas chamber inside is communicated with the annular gap, for distributing purging gas to the annular gap evenly;The gas chamber bottom is provided with purging pipe, for conveying purging gas to the gas chamber inside.

[0008] Based on above setting, the air brick is combined by multiple through holes and ceramic rod, so that purging gas can be evenly distributed to ladle bottom, ensure the air permeability and uniformity of distribution of gas, thereby effectively avoid local overheating and molten steel solidification phenomenon, improve molten steel quality and service life of ladle.

[0009] Annular gap is divided into multiple section structure by the partition of compact body, can reduce gas pressure fluctuation, reduce gas short-circuit phenomenon, improve the stability and uniformity of gas distribution at the same time.

[0010] In the preferred technical scheme of the above-mentioned ladle bottom gas distribution brick, an annular rib for supporting the dense body is arranged in the gas chamber, and the annular rib is arranged in a segmented structure to avoid the flow of the purging gas in the gas chamber.

[0011] Based on the above arrangement, the annular rib is arranged inside the gas chamber to effectively support the dense body, prevent it from deforming or being damaged under the action of high temperature and high pressure, and improve the stability of the overall structure.

[0012] The annular rib is designed in a segmented structure to avoid the direct flow of the purging gas in the gas chamber, further reduce the turbulence and pressure fluctuation in the gas flow process, and thus improve the uniformity of the gas distribution.

[0013] In the preferred technical scheme of the above-mentioned ladle bottom gas distribution brick, the annular rib is arranged as a steel rib with a diameter of 8 mm.

[0014] Based on the above arrangement, the annular rib is arranged as a steel rib with a diameter of 8 mm, which not only has sufficient strength to support the dense body, but also reduces the hindering effect of the steel rib on the flow field inside the gas chamber, optimizes the gas flow path, and improves the durability and thermal stress resistance of the annular rib.

[0015] In the preferred technical scheme of the above-mentioned ladle bottom gas distribution brick, the shell is arranged in a conical cylinder structure with a larger diameter at the top than at the bottom, and the dense body is filled with refractory mortar between the shell.

[0016] Based on the above arrangement, the shell is designed in a conical cylinder structure with a larger diameter at the top than at the bottom, which can effectively enhance the positioning and stability of the gas distribution brick in the ladle bottom, and prevent it from shifting or loosening during operation.

[0017] The dense body is filled with refractory mortar between the shell, which not only improves the air tightness of the overall structure, but also enhances the thermal shock resistance and durability of the gas distribution brick in high temperature environment.

[0018] In the preferred technical scheme of the above-mentioned ladle bottom gas distribution brick, the number of ceramic rods is 30-100, and the top and bottom diameters of the ceramic rods are arranged as 8-20 mm; the ceramic rods are zirconia ceramic or alumina ceramic.

[0019] Based on the above arrangement, by arranging 30-100 ceramic rods, the overall gas permeation area of the gas distribution brick is matched with the purging demand of the ladle, effectively improving the uniformity of the purging gas distribution.

[0020] The diameter of the ceramic rod is designed to be 8-20 mm to ensure a good balance between strength and gas permeability. The use of zirconia ceramic or alumina ceramic material has excellent high temperature resistance and corrosion resistance, prolonging the service life of the gas distribution brick.

[0021] In the preferred technical scheme of the steel ladle bottom purging brick, the annular gap width is set to 10-25 mm, and the annular gap is divided into 2-4 sections by partitions.

[0022] Based on the above setting, the annular gap width is set to 10-25 mm, which ensures the flow capacity of the gas in the annular gap, while avoiding the problems of insufficient gas pressure caused by too wide and the risk of blockage caused by too narrow.

[0023] The annular gap is divided into 2-4 sections by partitions, effectively inhibiting the lateral flow phenomenon in the gas flow, further improving the uniform distribution capacity of the gas, and enhancing the purging effect of the purging brick.

[0024] In the preferred technical scheme of the steel ladle bottom purging brick, the shell is a high-temperature-resistant stainless steel shell.

[0025] Based on the above setting, the shell is made of high-temperature-resistant stainless steel material, which has good high-temperature strength and oxidation resistance, can withstand the action of high-temperature molten steel and purging gas, and improves the structural strength and service life of the purging brick.

[0026] The stainless steel material also has excellent processing performance, which facilitates the manufacturing and assembly of the purging brick shell.

[0027] In the preferred technical scheme of the steel ladle bottom purging brick, the purging pipe is a hollow seamless steel pipe with an outer diameter of 18 mm.

[0028] Based on the above setting, the purging pipe is a hollow seamless steel pipe with an outer diameter of 18 mm, which ensures the flow and pressure stability of the purging gas, and has sufficient mechanical strength and corrosion resistance, and is not easy to leak or deform under the action of high-temperature purging gas.

[0029] The seamless structure improves the air tightness and reliability of the pipe, effectively preventing the leakage of purging gas from affecting the system performance.

[0030] In the preferred technical scheme of the steel ladle bottom purging brick, the dense body is a corundum spinel refractory with a cold permanent linear change rate of 0-0.20%.

[0031] Based on the above setting, the dense body is made of corundum spinel refractory with a cold permanent linear change rate of 0-0.20%, which ensures that the dense body has small size change in high-temperature cooling cycle, greatly improving the thermal shock resistance and high-temperature stability of the purging brick.

[0032] The corundum spinel material has excellent corrosion resistance and wear resistance, and can effectively resist chemical corrosion and mechanical erosion in molten steel, prolonging the service life of the purging brick. BRIEF DESCRIPTION OF DRAWINGS

[0033] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. In the drawings:

[0034] Figure 1 A schematic diagram of a cubic structure of the present application is shown.

[0035] Figure 2 A schematic diagram of an annular gap structure between the ceramic rod and the dense body of the present application is shown.

[0036] Figure 3 A schematic diagram of the gas chamber and the purge pipe structure of the present application is shown.

[0037] Figure 4 A schematic diagram of the internal structure of the gas chamber of the present application is shown.

[0038] Reference signs:

[0039] 1, shell; 2, ceramic rod; 3, dense body; 4, purge pipe; 5, gas chamber; 6, annular gap; 7, annular rib; 8, partition. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application. Those skilled in the art can make adjustments as needed to adapt to specific application occasions.

[0041] It should be noted that in the description of the present application, the terms "middle", "upper", "lower", "left", "right", "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not intended to indicate or imply that the structure must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In addition, it should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the connection inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] The present application provides a kind of steel ladle bottom air brick, air brick includes:

[0044] The shell 1 is internally provided with a main core structure, the main core structure comprises a compact body 3 formed with a plurality of through holes and ceramic rods 2 corresponding to the plurality of through holes, the through holes are distributed in a ring radial manner on the compact body 3, the ceramic rods 2 are inserted into the through holes, and the diameter of the ceramic rods 2 is smaller than the inner wall hole diameter of the through holes, so that an annular gap 6 is formed between the ceramic rods 2 and the compact body 3, a partition 8 extending from the compact body 3 is formed in the annular gap 6, so that the annular gap 6 forms a multi-section structure; it should be noted that the specific structure of the shell 1 is not limited in the utility model, and the person skilled in the art can set it according to the needs, for example, the shell 1 can be an integral structure, and for example, the shell 1 can also be a split structure, as long as the heat resistance of the shell 1 is high and the sealing performance is good. In the preferred embodiment, the shell 1 is designed as a conical cylinder structure with a top diameter larger than a bottom diameter, and the compact body 3 is filled with fireclay between the compact body 3 and the shell 1. The shell 1 is designed as a conical cylinder structure with a top diameter larger than a bottom diameter, which can effectively enhance the positioning and stability of the air brick in the ladle bottom, preventing displacement or loosening during operation. The compact body 3 is filled with fireclay between the compact body 3 and the shell 1, which not only improves the air tightness of the overall structure, but also enhances the heat shock resistance and durability of the air brick in high temperature environment. Moreover, the shell 1 is a high-temperature-resistant stainless steel shell. The shell 1 is made of high-temperature-resistant stainless steel material, which has good high-temperature strength and oxidation resistance, can withstand the action of high-temperature molten steel and purging gas, and improves the structural strength and service life of the air brick. The stainless steel material also has excellent processing performance, facilitating the manufacture and assembly of the air brick shell 1.

[0045] In addition, it should be noted that the specific structure of the ceramic rod 2 is not limited in the utility model, and the person skilled in the art can set it according to the needs, for example, the ceramic rod 2 can be a regular column structure, and for example, the ceramic rod 2 can also be an irregular column structure, as long as the cooperation of the ceramic rod 2 and the compact body 3 produces enough space to form the annular gap 6. In the preferred embodiment, the number of ceramic rods 2 is 30-100, and the top diameter and bottom diameter of the ceramic rod 2 are 8-20 mm; the ceramic rod 2 is zirconia ceramic or alumina ceramic, by setting 30-100 ceramic rods 2, the overall air permeation area of the air brick is matched with the purging demand of the ladle, and the distribution uniformity of the purging gas is effectively improved. The diameter range of the ceramic rod 2 is designed to be 8-20 mm, which ensures a good balance between strength and air permeation performance. The zirconia ceramic or alumina ceramic material has excellent high-temperature resistance and corrosion resistance, prolonging the service life of the air brick.

[0046] Furthermore, the utility model discloses not to the specific structure of annular gap 6 make any limit, and the technical personnel of the art can set up according to the demand, as long as the gas in annular gap 6 can be stabilized flow, can. In the preferred embodiment, the width of annular gap 6 is set to 10-25mm, and the annular gap 6 is divided into 2-4 sections by the partition 8. The width of the annular gap 6 is set to 10-25mm, which ensures the flow capacity of the gas in the annular gap 6, and at the same time avoids the problem of insufficient gas pressure caused by excessive width and the risk of blockage caused by excessive narrow. The annular gap 6 is divided into 2-4 sections by the partition 8, which effectively suppresses the lateral channeling phenomenon in the gas flow, further improves the uniform distribution ability of the gas, and enhances the purging effect of the gas permeable brick.

[0047] The gas chamber 5 is closed and welded at the bottom of the shell 1, and the inside of the gas chamber 5 is communicated with the annular gap 6, which is used for uniformly distributing the purging gas to the annular gap 6. The bottom of the gas chamber 5 is provided with a purging pipe 4 for conveying the purging gas to the inside of the gas chamber 5. Of course, it should be noted that the utility model discloses not to the specific structure of gas chamber 5 make any limit, and the technical personnel of the art can set up according to the demand, for example, the gas chamber 5 can be a multi-partition 8 gas chamber 5 structure, and for example, the gas chamber 5 can also be a straight-through gas chamber 5 structure, as long as the gas flowing in the gas chamber 5 is uniformly smooth. In the preferred embodiment, the purging pipe 4 is a hollow seamless steel pipe with an outer diameter of 18mm. The purging pipe 4 adopts a hollow seamless steel pipe with an outer diameter of 18mm, which ensures the stability of the flow and pressure of the purging gas, and at the same time has sufficient mechanical strength and corrosion resistance, and is not easy to leak or deform under the action of high-temperature purging gas. The seamless structure improves the air tightness and reliability of the pipe material, effectively preventing the leakage of the purging gas from affecting the system performance.

[0048] The gas permeable brick is combined by a plurality of through holes and the ceramic rod 2, so that the purging gas can be uniformly distributed to the bottom of the ladle, ensuring the gas permeability and uniformity of the distribution, thereby effectively avoiding local overheating and solidification of the molten steel, improving the quality of the molten steel and the service life of the ladle, and the annular gap 6 is divided into a plurality of sections by the partition 8 of the dense body 3, which can reduce the gas pressure fluctuation and reduce the gas short circuit phenomenon, and at the same time improve the stability and uniformity of the gas distribution.

[0049] The annular rib 7 is arranged in the gas chamber 5 to effectively support the dense body 3, prevents the dense body 3 from being deformed or damaged under the action of high temperature and high pressure, improves the stability of the overall structure, the annular rib 7 is designed as a segmented structure, avoids the direct flow of the purge gas in the gas chamber 5, further reduces the turbulence and pressure fluctuation in the gas flow process, and thus improves the uniformity of the gas distribution. In the preferred embodiment, the annular rib 7 is arranged as a steel bar with a diameter of 8 mm. Arranging the annular rib 7 as a steel bar with a diameter of 8 mm not only has sufficient strength to support the dense body 3, but also reduces the hindering effect of the steel bar on the flow field inside the gas chamber 5, optimizes the gas flow path, and at the same time improves the durability and thermal stress resistance of the annular rib 7.

[0050] The dense body 3 is a corundum spinel refractory body with a cold permanent linear change rate of 0-0.20%. The dense body 3 is made of a corundum spinel refractory body with a cold permanent linear change rate of 0-0.20%, which ensures that the size change of the dense body 3 is small during high-temperature cooling cycle, greatly improving the thermal shock resistance and high-temperature stability of the air brick. The corundum spinel material has excellent corrosion resistance and wear resistance, can effectively resist chemical corrosion and mechanical erosion in the molten steel, and prolongs the service life of the air brick.

[0051] So far, the technical scheme of the utility model has been described in combination with the optional embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without deviating from the principles of the utility model, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical scheme after the changes or replacements will fall within the protection scope of the utility model.

Claims

1. A breather plug for a ladle bottom, characterized by The air brick comprises: an outer shell, which is internally provided with a main core structure, the main core structure comprising a dense body formed with a plurality of through holes and ceramic rods corresponding to the through holes, the through holes being formed on the dense body in a ring radial distribution, the ceramic rods being inserted into the through holes, and the ceramic rods having a diameter smaller than the inner wall diameter of the through holes, so that an annular gap is formed between the ceramic rods and the dense body, and a partition extending from the dense body is formed in the annular gap, so that the annular gap forms a segmented structure; an air chamber, which is closed and welded at the bottom of the outer shell, the air chamber being in communication with the annular gap inside the outer shell, for uniformly distributing the purge gas to the annular gap; and a purge pipe provided at the bottom of the air chamber, for conveying the purge gas to the inside of the air chamber.

2. The ladle bottom gas permeable brick according to claim 1, characterized by An annular rib is arranged in the air chamber for supporting the dense body, the annular rib being arranged in a segmented structure to avoid the flow of the purge gas in the air chamber.

3. The ladle bottom gas permeable brick according to claim 2, characterized by The annular rib is arranged as a steel rib with a diameter of 8 mm.

4. The ladle bottom gas permeable brick according to claim 1, characterized by The outer shell is arranged as a conical structure with a larger top diameter than a bottom diameter, and the dense body is filled with refractory mortar between the dense body and the outer shell.

5. The ladle bottom gas permeable brick according to claim 1, characterized by The number of the ceramic rods is 30-100, and the top and bottom diameters of the ceramic rods are arranged as 8-20 mm; the ceramic rods are zirconia ceramic or alumina ceramic.

6. The ladle bottom gas permeable brick according to claim 1, characterized by The width of the annular gap is arranged as 10-25 mm, and the annular gap is divided into 2-4 segments by the partition.

7. The ladle bottom gas permeable brick according to claim 1, characterized by The outer shell is a high-temperature-resistant stainless steel shell.

8. The ladle bottom gas permeable brick according to claim 1, characterized by The purge pipe is a hollow seamless steel pipe with an outer diameter of 18 mm.

9. The ladle bottom gas permeable brick according to claim 1, characterized by The dense body is a corundum spinel refractory body with a cold permanent linear change rate of 0-0.20%.

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