CN209816189U - Device for inhibiting nitrogen in air from entering molten steel in converter tapping process - Google Patents
Device for inhibiting nitrogen in air from entering molten steel in converter tapping process Download PDFInfo
- Publication number
- CN209816189U CN209816189U CN201920132439.8U CN201920132439U CN209816189U CN 209816189 U CN209816189 U CN 209816189U CN 201920132439 U CN201920132439 U CN 201920132439U CN 209816189 U CN209816189 U CN 209816189U
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- CN
- China
- Prior art keywords
- sliding plate
- branch pipes
- argon
- steel
- tapping
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- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 90
- 239000010959 steel Substances 0.000 title claims abstract description 90
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 58
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000002401 inhibitory effect Effects 0.000 title claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 130
- 229910052786 argon Inorganic materials 0.000 claims abstract description 65
- 239000007789 gas Substances 0.000 claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The utility model relates to a device of nitrogen entering molten steel in converter tapping in-process restraines air, including installing in the slide pushing off the slag mechanism of tapping passageway, being fixed in the support of tapping passageway lateral wall, being fixed in argon gas ring pipe and a plurality of argon gas branch pipe on the support, the slide plane of slide pushing off the slag mechanism is the horizontal plane, and the plane at argon gas ring pipe place is the horizontal plane, and a plurality of argon gas branch pipes are connected respectively on the argon gas ring pipe. The utility model discloses can effectively avoid tapping nitrogen in the in-process air to get into the molten steel, reduce nitrogen content in the molten steel, guarantee molten steel quality.
Description
Technical Field
The utility model relates to a device for inhibiting nitrogen in air from entering molten steel in the tapping process of a converter, belonging to the technical field of converter steelmaking equipment.
Background
With the rapid development of the steel industry, the requirements on the deep drawability, the strength and the high-temperature plasticity of steel are higher and higher; nitrogen, one of the elements in steel, is present in most cases as a harmful element, seriously affecting the strength and plasticity of the steel, and reducing the deep drawability of the steel. Therefore, when a product with high added values of deep drawing, high strength and the like is smelted, the nitrogen content in steel must be reduced to reduce the harm degree of nitrogen in molten steel.
In the process of tapping of a converter by a general metallurgical enterprise, a steel flow is exposed in the atmosphere, the surface of the steel flow is contacted with the air, and in the process of tapping to a steel ladle, the nitrogen content in molten steel is greatly increased after deoxidation alloying, and is increased by about 10ppm on average; the nitrogen content after the converter tapping brings difficulty and pressure to the treatment of the subsequent working procedure, and influences the quality of molten steel. Through analysis, the nitrogen increasing amount of the carburant and the alloy material added in the tapping process is 1-2ppm, and 8-9ppm of nitrogen from air is proved; in order to reduce the nitrogen content entering molten steel from air in the process of converter tapping, at present, steel plants basically reduce the nitrogen increase of converter tapping by controlling the roundness of tapping steel flow, higher requirements are put forward for the operation level of operators and the service life of a converter tapping hole, and improper control easily causes nitrogen in the air in the process of tapping to enter the molten steel, so that the nitrogen content of the molten steel is increased, and the quality of a final finished product is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a device that nitrogen among the converter tapping in-process restraines the air gets into the molten steel is provided, can effectively avoid the nitrogen among the tapping in-process air to get into the molten steel, reduces nitrogen content in the molten steel, guarantees the molten steel quality.
The technical scheme for solving the technical problems is as follows:
the device for inhibiting nitrogen in air from entering molten steel in the converter tapping process comprises a sliding plate slag blocking mechanism arranged on a tapping channel, a support fixed on the side wall of the tapping channel, an argon annular pipe fixed on the support and a plurality of argon branch pipes, wherein the sliding plate plane of the sliding plate slag blocking mechanism is a horizontal plane, the plane of the argon annular pipe is a horizontal plane, and the argon branch pipes are respectively connected to the argon annular pipe.
The sliding plate slag stopping mechanism comprises an upper sliding plate, a lower sliding plate and a middle sliding plate positioned between the upper sliding plate and the lower sliding plate, the upper sliding plate is fixed at a steel tapping hole of a steel tapping channel, the lower sliding plate is connected with the upper sliding plate in an embedded manner, the middle sliding plate is connected with the upper sliding plate and the lower sliding plate in a sliding manner, and the 3 sliding plates are all provided with round holes with through thicknesses; when the converter taps steel, the axes of the round holes on the 3 sliding plates are superposed with the axis of the tapping channel, and the middle sliding plate is in an open state; the argon annular pipe is positioned in the middle of the steel tapping hole and the steel ladle, the upper ends of the argon branch pipes are respectively communicated with the argon annular pipe, and the lower ends of the argon branch pipes are provided with spray heads.
The device for inhibiting nitrogen in air from entering molten steel in the converter tapping process comprises a plurality of argon branch pipes, wherein the plurality of argon branch pipes are composed of a plurality of long branch pipes and a plurality of short branch pipes, and the long branch pipes and the short branch pipes are connected to an argon annular pipe in a crossed mode at the same intervals.
According to the device for inhibiting nitrogen in air from entering molten steel in the converter tapping process, the spray head is a Laval type spray head.
In the above apparatus for suppressing nitrogen in the air from entering molten steel during tapping of the converter, the plurality of long branch pipes are the same in length, and the plurality of short branch pipes are the same in length.
The utility model discloses a working process does:
when the converter taps steel, the middle slide plate of the slide plate slag stopping mechanism is in an open state, and the round holes on the 3 slide plates are coaxial, so that the smooth outflow of molten steel is ensured; opening an argon pipeline valve while tapping, and spraying argon from a Laval type spray head after the argon passes through an argon annular pipe and an argon branch pipe; the Laval type spray head is uniformly distributed on the argon annular pipe in a crossed mode through the long and short argon branch pipes, the short branch pipe achieves that argon at the short distance of the steel outlet blocks air around the steel flow, the long branch pipe achieves that argon at the long distance of the steel outlet blocks air around the steel flow, therefore, the argon surrounds the steel flow at the steel outlet through the Laval type spray head to form an air curtain, the whole process from the steel outlet to the steel outlet protects the steel flow, the influence of nitrogen increase of the steel flow by the air can be effectively isolated, meanwhile, when the argon reaches the surface of the steel ladle, a layer of protective air film is formed on the upper surface of molten steel to isolate the air, nitrogen in the atmosphere is further inhibited from entering the steel ladle, and the content of harmful element nitrogen in the steel ladle is reduced.
The utility model has the advantages that:
the utility model discloses an argon gas flows around the steel and forms the argon gas layer with the upper surface of ladle mouth molten steel, and isolated air and molten steel contact effectively avoid tapping nitrogen in-process air to get into the molten steel, guarantee molten steel quality.
Drawings
FIG. 1 is a schematic view of the installation structure of the present invention;
FIG. 2 is a view taken along line A-A of FIG. 1;
FIG. 3 is a schematic structural view of a sliding plate slag stopping mechanism;
labeled as: the device comprises a steel tapping channel 1, a sliding plate slag stopping mechanism 2, a support 3, an argon annular pipe 4, an argon branch pipe 5, a round hole 6, a steel ladle 7, a spray head 8, a converter body 9, an upper sliding plate 21, a lower sliding plate 22 and a middle sliding plate 23.
The specific implementation mode is as follows:
FIG. 1 shows that the lower part of the converter body 9 is a steel tapping channel 1, and the bottom of the steel tapping channel 1 is a steel tapping hole;
fig. 1 and 2 show that the device for inhibiting nitrogen in air from entering molten steel in the tapping process of the converter of the utility model comprises a sliding plate slag stopping mechanism 2 arranged at the tapping hole of a tapping channel 1, a bracket 3 fixed on the side wall of the tapping channel 1, an argon annular pipe 4 fixed on the bracket 3 and a plurality of argon branch pipes 5; the sliding plate slag stopping mechanism 2 consists of 3 sliding plates which are overlapped with each other, namely an upper sliding plate, a middle sliding plate and a lower sliding plate, the upper surface of the upper sliding plate 21 is fixed with the steel tapping hole, the upper surface of the fixed upper sliding plate 21 is a horizontal plane, the lower sliding plate 22 is fixedly connected with the upper sliding plate 21 in an embedded manner, the middle sliding plate 23 is positioned between the upper sliding plate 21 and the lower sliding plate 22 and is connected with the upper sliding plate and the lower sliding plate in a sliding manner, the 3 sliding plates are all provided with circular holes 6 with through thickness, and the diameter of each circular hole 6 is the same as that; the axis of the round hole on the middle sliding plate 23 is superposed with the axis of the round hole 6 on the upper sliding plate and the lower sliding plate and the axis of the steel tapping channel 1 through the drawing movement of the middle sliding plate 23, so that the purpose of opening the steel tapping hole to tap steel is realized; (ii) a The plane of the argon annular tube 4 is a horizontal plane;
fig. 1 and 2 show that the support 3 is 2 right-angle rod bodies, two ends of each right-angle rod body are respectively fixedly connected with the side wall of the steel tapping channel 1 and the argon annular pipe 4, after connection, the plane where the argon annular pipe 4 is located can be ensured to be a horizontal plane, and after the argon annular pipe 4 is fixed, the height of the support 3 needs to ensure that the plane where the outlet of the spray head 8 at the lower end of the short branch pipe is located and the lower surface of the lower sliding plate of the sliding plate slag stopping mechanism 2 are in the same horizontal plane;
FIG. 1 shows that the plurality of argon branch pipes 5 are composed of a plurality of long branch pipes having the same length and a plurality of short branch pipes having the same length, the long branch pipes and the short branch pipes being connected to the argon annular pipe 4 at the same interval; the upper ends of the argon branch pipes 5 are respectively communicated with the argon annular pipe 4, the lower ends of the argon branch pipes are provided with spray heads 8, and the spray heads 8 are Laval type spray heads;
fig. 2 shows that, in the present embodiment, there are 8 argon branch pipes 5, including 4 long branch pipes and 4 short branch pipes, where the 4 long branch pipes and the 4 short branch pipes are arranged in a crossed manner at the same intervals with the argon annular pipe 4, and the lower end of each argon branch pipe 5 is provided with a laval-type nozzle;
fig. 1 shows that, in actual production, when argon is introduced into the argon annular pipe 4, the laval-type nozzles at the lower ends of the short branch pipes of the present invention are located on the same horizontal plane, the injection angles of the laval-type nozzles are added to be 360 degrees, and the sprayed argon gas mist can realize the blocking of the argon gas at the short distance of the steel tapping hole to the air around the steel flow; in a similar way, the plurality of long branch pipes can realize the blockage of argon at the remote part of the steel-tapping hole to air around the steel flow, so that the argon surrounds the steel flow around the steel-tapping hole through the Laval type spray head to form an air curtain, the whole course from the steel-tapping hole to the steel-tapping hole is protected by the air curtain, the nitrogen increasing influence of the air on the steel flow can be effectively isolated, meanwhile, when the argon reaches the surface of the steel ladle, a layer of protective air film can be formed on the upper surface of the molten steel to isolate the air, the nitrogen in the atmosphere is further inhibited from entering the steel ladle, and the content of harmful element nitrogen in the steel.
Claims (5)
1. The device for inhibiting nitrogen in air from entering molten steel in the converter tapping process is characterized in that: the argon gas slag pushing device comprises a sliding plate slag pushing mechanism (2) installed on a steel tapping channel (1), a support (3) fixed on the side wall of the steel tapping channel (1), an argon gas annular pipe (4) and a plurality of argon gas branch pipes (5) fixed on the support (3), wherein the sliding plate plane of the sliding plate slag pushing mechanism (2) is a horizontal plane, the plane where the argon gas annular pipe (4) is located is a horizontal plane, and the argon gas branch pipes (5) are connected to the argon gas annular pipe (4) respectively.
2. The apparatus for suppressing nitrogen in the air from entering molten steel during tapping of a converter as set forth in claim 1, wherein: the sliding plate slag blocking mechanism comprises an upper sliding plate (21), a lower sliding plate (22) and a middle sliding plate (23) positioned between the upper sliding plate (21) and the lower sliding plate (22), the upper sliding plate (21) is fixed on a steel tapping hole of the steel tapping channel (1), the lower sliding plate (22) is embedded and connected with the upper sliding plate (21), the middle sliding plate (23) is connected with the upper sliding plate (21) and the lower sliding plate (22) in a sliding manner, and round holes (6) with through thickness are formed in all the 3 sliding plates; when the converter taps steel, the axes of the round holes (6) on the 3 sliding plates are superposed with the axis of the tapping channel (1), and the middle sliding plate (23) is in an open state; the argon annular pipe (4) is positioned in the middle of the steel tapping hole and the steel ladle (7), the upper ends of the argon branch pipes (5) are respectively communicated with the argon annular pipe (4), and the lower ends of the argon branch pipes are provided with the spray heads (8).
3. The apparatus for suppressing nitrogen in the air from entering molten steel during tapping of a converter as set forth in claim 1, wherein: the argon branch pipes (5) are composed of a plurality of long branch pipes and a plurality of short branch pipes, and the long branch pipes and the short branch pipes are connected to the argon annular pipe (4) in a crossing mode at the same intervals.
4. The apparatus for suppressing nitrogen in the air from entering molten steel during tapping of a converter as set forth in claim 2, wherein: the spray head (8) is a Laval type spray head.
5. The apparatus for suppressing nitrogen in the air from entering molten steel during tapping of a converter as set forth in claim 3, wherein: the lengths of the long branch pipes are the same, and the lengths of the short branch pipes are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920132439.8U CN209816189U (en) | 2019-01-25 | 2019-01-25 | Device for inhibiting nitrogen in air from entering molten steel in converter tapping process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920132439.8U CN209816189U (en) | 2019-01-25 | 2019-01-25 | Device for inhibiting nitrogen in air from entering molten steel in converter tapping process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209816189U true CN209816189U (en) | 2019-12-20 |
Family
ID=68872008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920132439.8U Expired - Fee Related CN209816189U (en) | 2019-01-25 | 2019-01-25 | Device for inhibiting nitrogen in air from entering molten steel in converter tapping process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209816189U (en) |
-
2019
- 2019-01-25 CN CN201920132439.8U patent/CN209816189U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191220 |