CN216758087U - Injection flow gas protection brick - Google Patents
Injection flow gas protection brick Download PDFInfo
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- CN216758087U CN216758087U CN202122719597.3U CN202122719597U CN216758087U CN 216758087 U CN216758087 U CN 216758087U CN 202122719597 U CN202122719597 U CN 202122719597U CN 216758087 U CN216758087 U CN 216758087U
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- cylindrical wall
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- funnel
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Abstract
The utility model discloses a flow injection gas protection brick, which comprises a cylindrical wall and a base, wherein the base is arranged at the lower part of the cylindrical wall; the shape of the cylindrical wall is a truncated cone shape, and the outer diameter of the top part is smaller than that of the bottom part; the middle part of the cylindrical wall is provided with a through hole for the protective brick, a plurality of gas channels are arranged in the cylindrical wall and the base, one opening of each gas channel is positioned at the top end of the cylindrical wall, and the other opening is positioned on the side wall of the base. The utility model can improve the gas protection effect of the molten steel runner during the casting of the molten steel and prolong the service life of the gas protection device.
Description
Technical Field
The utility model belongs to the technical field of steel ingot pouring and stream injection protection, and particularly relates to a stream injection gas protection brick.
Background
The cleanliness of the molten steel is improved after the molten steel is secondarily refined, but in the ingot casting process, as the molten steel is poured in the atmosphere, secondary oxidation can be generated when the molten steel is contacted with ambient air by an injection flow, the cleanliness of the molten steel is damaged, and the total oxygen content is obviously increased by 3-5ppm when the molten steel is sampled from a final product. At present, most smelting enterprises adopt a mode of argon protection injection flow to solve the problem. The argon protection device is mostly an argon protection cover made of steel materials.
The defects and shortcomings of the conventional steel argon protective cover are as follows:
1) the conventional argon gas protection cover is a circular ring made of steel materials, a plurality of holes are formed in the circular ring and used as gas injection holes of argon gas, and the conventional argon gas protection cover is complex to manufacture.
2) And the pouring environment is severe, molten steel splashing easily blocks the air jet hole of the protective cover, so that local air curtain loss is caused, and the protective effect is not thorough.
3) The steel argon protective cover is easy to deform due to the high casting temperature, and the sealing effect is poor; after the protective cover is used, the protective cover is difficult to clean, the service life of the argon protective cover is short, and the production cost of cast ingots is improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pouring gas protection brick which can improve the gas protection effect of a molten steel runner during molten steel casting and prolong the service life of a gas protection device.
The technical scheme is as follows:
the flow injection gas protection brick comprises a cylindrical wall and a base, wherein the base is arranged at the lower part of the cylindrical wall; the shape of the cylindrical wall is a truncated cone shape, and the outer diameter of the top part is smaller than that of the bottom part; the middle part of the cylindrical wall is provided with a through hole for the protective brick, a plurality of gas channels are arranged in the cylindrical wall and the base, one opening of each gas channel is positioned at the top end of the cylindrical wall, and the other opening is positioned on the side wall of the base.
Further, the gas channel in the base is a step-shaped hole.
Furthermore, the joint of the cylindrical wall and the base is an arc-shaped ring surface.
Further, the lower part of the base is provided with a funnel brick.
Furthermore, a sealing ring groove is formed in the bottom of the base, and the top of the funnel brick is located in the sealing ring groove.
Furthermore, the funnel brick is in a shape of a cone frustum, the middle of the funnel brick is a funnel brick through hole, the protective brick through hole is communicated with the funnel brick through hole, and the outer diameter of the upper part of the funnel brick is larger than that of the lower part of the funnel brick.
Further, the bottom of the funnel brick is provided with an annular closing-in.
Compared with the prior art, the utility model has the following advantages:
the gas protection device is used as a part of the gas protection device on the molten steel runner during the molten steel casting, can improve the gas protection effect of the molten steel runner during the molten steel casting, increases the use times of the gas protection device, prolongs the service life of the gas protection device, and reduces the smelting cost.
1. The shape of the gas protection brick for injection flow is a special-shaped piece, the material is nano high-temperature ceramic, the special-shaped piece using the nano high-temperature ceramic can have compression resilience under the requirement of ensuring the strength, and the defects of oxidation resistance and high-temperature deformation resistance which are deficient in metal products can be overcome.
2. The flow injection gas protection brick has the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small specific heat, mechanical vibration resistance, no toxicity and the like.
3. The flow injection gas protection brick has simple structure, convenient installation and replacement, no deformation after use and repeated use.
The repeated use times can reach more than 5 times, and compared with a steel argon protection device, the steel can be saved by about 100 ten thousand yuan by year smelting of 1200 furnaces.
4. The gas-injected protective brick can fully isolate the air around the molten steel after introducing argon, thereby preventing the molten steel from being oxidized and playing a role in protection.
The argon protection effect in the steel ingot casting process can be improved, secondary oxidation of molten steel is avoided, the steel ingot casting quality is improved, and the steel ingot percent of pass is improved by 3% -4%. Taking a seamless tube for an annual 1 ten thousand ton extrusion ultrahigh pressure boiler as an example, the economic benefit is about 150 ten thousand yuan.
Drawings
FIG. 1 is a schematic structural view of a gas-injection protective brick according to the present invention;
fig. 2 is a schematic view of the connection of the funnel brick and the injection gas protection brick of the present invention.
Detailed Description
The following description sufficiently illustrates specific embodiments of the utility model to enable those skilled in the art to practice and reproduce it.
Fig. 1 is a schematic structural view of the gas-injection protective brick of the present invention.
The material of the injection flow gas protection brick is high-temperature ceramic, and the injection flow gas protection brick is formed by firing a ceramic refractory material, so that the preparation is simple, the cost is low, and the injection flow gas protection brick is high-temperature resistant. Density of the gas-shielded brick: 0.3 to 0.5 (t/m)3) The heat conductivity coefficient: 0.034 (W/m.k)The use temperature: 1260-1400 (. degree. C.), linear shrinkage: the linear shrinkage rate is less than 2.6 percent after being kept for 3 hours at 1000 ℃.
The gas protection brick of notes class includes: the device comprises a cylindrical wall 1 and a base 2, wherein the base 2 is arranged at the lower part of the cylindrical wall 1, a protective brick through hole is arranged in the middle of the cylindrical wall 1, a plurality of gas channels 3 are arranged in the cylindrical wall 1 and the base 2, one opening of each gas channel 3 is positioned at the top end of the cylindrical wall 1 and serves as a gas outlet of protective gas flow, and the protective gas flow (argon gas) is sprayed to a mechanism protection plate of a ladle sliding nozzle from a brick to form a closed gas curtain so as to form a protective atmosphere for molten steel; the other opening is located in the side wall of the base 2 and serves as an air inlet for the protective air flow.
The appearance of cylindric wall 1 is circular truncated cone shape, and the top external diameter is less than the bottom external diameter, and the upper portion opening shrink is favorable to the coupling mechanism guard plate, and the lower part opening widen the stability that is favorable to the installation.
The gas channel 3 in the base 2 is a step-shaped hole, which is beneficial to connecting an argon pipeline.
The junction of cylindric wall 1, base 2 is arc anchor ring 4, is equivalent to the chamfer, is favorable to reducing stress concentration when high temperature warp, guarantees compression resilience, high temperature resistant deformation.
The bottom of the base 2 is provided with a sealing ring groove 5, which is beneficial to improving the sealing performance of the lower connecting part and preventing external air from entering the molten steel circulation channel.
Fig. 2 is a schematic view showing the connection between the funnel brick 6 and the gas-injection protective brick according to the present invention.
In order to further facilitate the connection of the injection gas protection brick and the middle casting pipe of the molten steel circulation channel, a funnel brick 6 is arranged at the lower part of the base 2, the top of the funnel brick 6 is connected with the base 2, the top of the funnel brick 6 is positioned in the sealing ring groove 5, and the bottom of the funnel brick is connected with the middle casting pipe.
The material of the funnel brick 6 is high-temperature ceramic, and the funnel brick is fired and formed by ceramic refractory materials, so that the funnel brick has the characteristics and advantages of the high-temperature ceramic.
The appearance of funnel brick 6 is circular cone frustum shape, and 6 middle parts of funnel brick are the funnel brick through-hole, and the protection brick through-hole is linked together with the funnel brick through-hole, and 6 upper portion external diameters of funnel brick are greater than the lower part external diameter. The upper opening is widened to facilitate connection with the base 2, and the lower opening is contracted to facilitate connection with the cast tube.
The bottom of the funnel brick 6 is provided with an annular closing-in 7, and the annular closing-in 7 is beneficial to connecting a middle cast tube.
The using method of the utility model is as follows:
1. preparation before installation;
and (4) finishing the building of the chassis according to the process requirement of the casting ingot type, and then installing a middle casting pipe on the chassis.
2. Installing a flow injection gas protection brick and a funnel brick 6;
the annular closing-in 7 of the funnel brick 6 is smeared with refractory mortar and is connected with a middle casting pipe, the middle casting pipe is connected with a casting mould, the top end of the funnel brick 6 is smeared with refractory mortar, and the sealing ring groove 5 of the cylindrical wall 1 is installed on the top end of the funnel brick 6 and is sealed by the refractory mortar.
3. The top end of the cylindrical wall 1 extends into a mechanism protection plate of a ladle sliding nozzle, and the gas channel 3 is connected with an argon pipeline;
4. pouring steel, wherein the molten steel enters the protective brick through hole of the cylindrical wall 1 and the funnel brick through hole of the funnel brick 6 through the ladle sliding nozzle and flows into the middle casting pipe and the casting mould; the protective gas flow is radially sprayed to the protective plate of the ladle sliding nozzle mechanism from the inner wall of the brick, argon enters the gas channel 3 and is sprayed out from the gas outlet at the top end of the cylindrical wall 1, a closed gas curtain is formed around the ladle sliding nozzle, and a protective atmosphere is formed for molten steel.
5. After pouring is finished, the bonded steel on the surfaces of the cylindrical wall 1 and the funnel brick 6 can be cleaned and reused.
The terminology used herein is for the purpose of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (7)
1. The flow injection gas protection brick is characterized by comprising a cylindrical wall and a base, wherein the base is arranged at the lower part of the cylindrical wall; the shape of the cylindrical wall is a truncated cone shape, and the outer diameter of the top part is smaller than that of the bottom part; the middle part of the cylindrical wall is provided with a through hole for the protective brick, a plurality of gas channels are arranged in the cylindrical wall and the base, one opening of each gas channel is positioned at the top end of the cylindrical wall, and the other opening is positioned on the side wall of the base.
2. The flood gas protection brick of claim 1 wherein the gas passages in the base are stepped holes.
3. The gas-protected brick of claim 1 wherein the junction of the cylindrical wall and the base is an arcuate torus.
4. The gas-protected pour brick of claim 1 wherein the lower portion of the base is provided with a funnel brick.
5. The gas-protected pour brick of claim 4 wherein the base has a sealing ring groove in the bottom and the top of the funnel brick is positioned in the sealing ring groove.
6. The gas-injected protective brick according to claim 4, wherein the funnel brick has a truncated cone shape, the funnel brick has a funnel brick through hole in the middle portion thereof, the protective brick through hole communicates with the funnel brick through hole, and the outer diameter of the upper portion of the funnel brick is larger than that of the lower portion thereof.
7. The gas-protected pour brick of claim 4 wherein the bottom of the funnel brick is provided with an annular constriction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122719597.3U CN216758087U (en) | 2021-11-08 | 2021-11-08 | Injection flow gas protection brick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122719597.3U CN216758087U (en) | 2021-11-08 | 2021-11-08 | Injection flow gas protection brick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216758087U true CN216758087U (en) | 2022-06-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122719597.3U Active CN216758087U (en) | 2021-11-08 | 2021-11-08 | Injection flow gas protection brick |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216758087U (en) |
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2021
- 2021-11-08 CN CN202122719597.3U patent/CN216758087U/en active Active
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