CN215481039U - Reducing oxygen lance head of converter - Google Patents
Reducing oxygen lance head of converter Download PDFInfo
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- CN215481039U CN215481039U CN202022132149.9U CN202022132149U CN215481039U CN 215481039 U CN215481039 U CN 215481039U CN 202022132149 U CN202022132149 U CN 202022132149U CN 215481039 U CN215481039 U CN 215481039U
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- oxygen
- lance
- lance head
- sleeve
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Abstract
The utility model discloses a converter reducing oxygen lance head which comprises an oxygen delivery pipe, an intermediate sleeve and a lance body outer sleeve which are sequentially arranged from inside to outside at intervals, wherein an oxygen distribution disc is connected to the end of the oxygen delivery pipe, a guide plate is connected to the end of the intermediate sleeve, a lance head end cover is arranged on the outer side of the end of the lance body outer sleeve, the end of the intermediate sleeve is positioned between the lance body outer pipe and the oxygen delivery pipe, a water inlet is formed in the center of the bottom of the intermediate sleeve, the bottom of the oxygen delivery pipe is opposite to the water inlet in position, a hole seam is formed between the water inlet and the bottom of the oxygen delivery pipe, a large spray hole and a small spray hole which are communicated with the oxygen distribution disc are formed in the lance head end cover, an oxygen lance nose is arranged in the center of the lance head end cover, and a convex cone body is arranged in the center of the oxygen distribution disc in the direction of the oxygen delivery pipe. The converter reducing oxygen lance head has large impact depth and more excellent molten pool stirring effect.
Description
Technical Field
The utility model belongs to the field of steelmaking, and particularly relates to a reducing oxygen lance head of a converter.
Background
In the converter steelmaking, oxygen is injected into a converter molten pool through an oxygen lance, and the laval hole of the head of the oxygen lance enables the oxygen jet velocity to be increased rapidly, so that the purpose of stirring the molten pool is achieved. The reasonable design of the oxygen lance head is very important for improving the smelting effect and reducing the smelting cost. The existing oxygen lance head spray holes are mostly in the same aperture, and the kinetic energy of the jet flow is reduced due to the influence of the intersection of adjacent jet flows, so that the smelting process is influenced. Therefore, in order to accelerate the production rhythm of the converter and reduce the content of iron oxide in slag, further modification and design of the existing oxygen lance are very necessary.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims to provide a reducing oxygen lance head of a converter, which has large impact depth and good molten pool stirring effect.
The technical scheme is as follows: the converter reducing oxygen lance head comprises an oxygen conveying pipe, an intermediate sleeve and an outer lance sleeve which are sequentially arranged from inside to outside at intervals, wherein an oxygen distribution disc is connected to the end of the oxygen conveying pipe, a guide plate is connected to the end of the intermediate sleeve, a lance head end cover is fixed to the outer side of the end of the outer lance sleeve, the end of the intermediate sleeve is located between the outer lance sleeve and the oxygen conveying pipe, a water inlet is formed in the center of the bottom of the intermediate sleeve, the bottom of the oxygen conveying pipe is opposite to the water inlet in position, a hole seam is formed between the water inlet and the bottom of the oxygen conveying pipe, a large spray hole and a small spray hole which are communicated with the oxygen distribution disc are formed in the lance head end cover, an oxygen lance nose is arranged in the center of the lance head end cover, and the center of the oxygen distribution disc is a cone which protrudes towards the direction of the oxygen conveying pipe, so that oxygen can be distributed, and resistance is reduced.
Further, the length of the convex vertebral body is 65 mm.
Furthermore, the included angles between the large spray hole and the small spray hole of the oxygen lance and the central line of the inner pipe are respectively 11-12 degrees and 13-14 degrees.
Further, the ratio of the large nozzle exit area to the small nozzle exit area was 1.93, and the ratio of the throat area was 1.86.
Furthermore, the two large spray holes and the two small spray holes are respectively arranged and are in crossed symmetrical distribution with the center of the gun head end cover.
Has the advantages that: according to the reducing oxygen lance head of the converter, after oxygen jet flow is sprayed out from the nozzle hole of the head, the jet flow is quickly attenuated due to the interaction of the adjacent jet flow and the ambient air. After different spray hole sizes and angles are arranged on the lance head, the attenuation speed of the oxygen jet flow is reduced, and the jet flow has higher kinetic energy when reaching the surface of a molten pool. Therefore, the impact depth of the converter reducing oxygen lance tip is large, and the stirring effect of the molten pool is more excellent.
Drawings
FIG. 1 is a first schematic view of a lance tip according to the present invention;
FIG. 2 is a second schematic view of the lance tip of the present invention;
FIG. 3 is a first schematic cross-sectional view of the lance tip of the present invention;
FIG. 4 is a second schematic sectional view of the lance tip of the present invention.
Detailed Description
For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.
The oxygen lance head of the embodiment is shown in fig. 1-4, and includes an oxygen delivery tube 3, an intermediate sleeve 2 and a lance outer sleeve 1, which are sequentially arranged from inside to outside at intervals, wherein an end of the oxygen delivery tube 3 is connected with an oxygen distribution plate 4, an end of the intermediate sleeve 2 is connected with a flow guide plate 5, a lance head end cover 7 is fixed on an outer side of the end of the lance outer sleeve 1, a large spray hole 8 and a small spray hole 9 communicated with the oxygen distribution plate 4 are arranged on the lance head end cover 7, an oxygen lance nose 6 is arranged at a center of the lance head end cover 7, and a length of a protruding cone from a center of the oxygen distribution plate 4 to the oxygen delivery tube 3 is 65 mm.
The middle sleeve 2 is a water inlet pipe, the bottom of the middle sleeve 2 is positioned between the bottom end of the outer sleeve 1 of the gun body and the bottom end of the oxygen conveying pipe 3, a water inlet is formed in the center of the bottom of the middle sleeve 2, the bottom of the oxygen conveying pipe 3 is opposite to the water inlet in position, and a pore gap is formed between the water inlet and the bottom of the oxygen conveying pipe 3, so that water can enter the end bottom through the pore gap. In addition, a water outlet channel is formed between the outer sleeve 1 of the gun body and the middle sleeve 2, and water flow can enter the end bottom through the hole seams and then is discharged to the outside through the water outlet channel.
The included angles between the large spray hole 8 and the small spray hole 9 of the oxygen lance and the central line of the inner tube are 11-12 degrees and 13-14 degrees respectively, the ratio of the outlet area of the large spray hole 8 to the outlet area of the small spray hole 9 is 1.93, the ratio of the throat area is 1.86, and the length of the cone protruding from the center of the oxygen distribution plate to the direction of the oxygen delivery tube is 65 mm. The Mach number of the oxygen lance large spray hole 8 is 2.05ma, and the Mach number of the small spray hole 9 is 1.98 ma. The design flow of the oxygen lance is 28000Nm3/h。
Claims (5)
1. A converter reducing oxygen lance head is characterized by comprising an oxygen conveying pipe (3), a middle sleeve (2) and an outer lance sleeve (1) which are sequentially arranged from inside to outside at intervals, wherein an oxygen distribution disc (4) is connected at the end of the oxygen conveying pipe (3), a guide plate (5) is connected at the end of the middle sleeve, a lance head end cover (7) is arranged outside the end of the outer lance sleeve (1), the end of the middle sleeve (2) is positioned between the outer lance sleeve (1) and the oxygen conveying pipe (3), a water inlet is formed in the center of the bottom of the middle sleeve (2), the bottom of the oxygen conveying pipe (3) is opposite to the water inlet, a hole gap is formed between the water inlet and the bottom of the oxygen conveying pipe (3), a large spray hole (8) and a small spray hole (9) which are communicated with the oxygen distribution disc are formed in the end cover lance head (7), an oxygen lance nose (6) is arranged in the center of the lance head end cover (7), the center of the oxygen distribution disc (4) is a convex cone body in the direction of the oxygen tube (3).
2. The reducing oxygen lance tip of the converter according to claim 1, wherein the length of the convex cone is 65 mm.
3. The reducing oxygen lance head of the converter according to claim 1, wherein the included angles between the large nozzle (8) and the small nozzle (9) of the oxygen lance and the central line of the inner tube are 11-12 degrees and 13-14 degrees respectively.
4. The converter reducing oxygen lance head according to claim 1, wherein the ratio of the outlet area of the large nozzle (8) to the outlet area of the small nozzle (9) is 1.93, and the ratio of the throat area is 1.86.
5. The reducing oxygen lance head of the converter according to claim 1, wherein two large spray holes and two small spray holes are respectively arranged and are distributed in a crossed and symmetrical manner with the center of the end cover of the lance head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022132149.9U CN215481039U (en) | 2020-09-25 | 2020-09-25 | Reducing oxygen lance head of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022132149.9U CN215481039U (en) | 2020-09-25 | 2020-09-25 | Reducing oxygen lance head of converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215481039U true CN215481039U (en) | 2022-01-11 |
Family
ID=79716439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022132149.9U Active CN215481039U (en) | 2020-09-25 | 2020-09-25 | Reducing oxygen lance head of converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215481039U (en) |
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2020
- 2020-09-25 CN CN202022132149.9U patent/CN215481039U/en active Active
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