CN216712155U - Converter oxygen lance equipment - Google Patents
Converter oxygen lance equipment Download PDFInfo
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- CN216712155U CN216712155U CN202122810162.XU CN202122810162U CN216712155U CN 216712155 U CN216712155 U CN 216712155U CN 202122810162 U CN202122810162 U CN 202122810162U CN 216712155 U CN216712155 U CN 216712155U
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- lance
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Abstract
The utility model relates to the field of metallurgical equipment, in particular to converter oxygen lance equipment, which comprises: the lance head body is used for connecting the lance body and ejecting oxygen to supply oxygen for converter steelmaking, and the lance head body is a traditional Laval nozzle; the spray nozzle, the throat and the outlet are sequentially arranged in the gun head body, and the included angle formed by the spray nozzle and the central axis in the gun head body is 11.5 degrees; the diameter of the throat is 40.4mm, and the diameter of the outlet is 51.4 mm; the converter oxygen lance equipment achieves the target effect of expected setting by researching and developing the structure of the oxygen lance nozzle and changing the diameter of the throat, the diameter of the outlet and the injection included angle.
Description
Technical Field
The utility model relates to the technical field of metallurgical equipment, in particular to converter oxygen lance equipment.
Background
In the steel-making industry, the yield of converter steel making is about 89% in our country, oxygen is blown into the converter for smelting, an oxygen lance is indispensable important equipment for converter steel making, and whether the selection of oxygen lance parameters is reasonable directly relates to the blowing efficiency.
Because the molten iron capacity of the I department is larger than the steelmaking capacity, the key of solving the problem that the ironmaking capacity is larger than the steelmaking capacity is how to improve the yield under the condition that the converter capacity is not changed. The oxygen lance is used as key equipment for converter steelmaking, and the selection of oxygen lance parameters is key. At present, the designed oxygen supply intensity of the oxygen top-blown converter of most iron and steel enterprises is mostly 3.4m3/mint～4.0m3Tmin; the smelting period is 24-32 min/furnace, and the large furnace smelting period is longer. The current smelting period of the company is 23.5-25 min/furnace.
In view of the above problems in the background art, the present invention is directed to a converter oxygen lance apparatus.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide converter oxygen lance equipment to solve the problems of improving oxygen supply strength, shortening oxygen supply time, further shortening smelting period and solving the problem that the molten iron capacity is higher than the steelmaking capacity in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme:
a converter oxygen lance apparatus comprising:
the lance head body is used for connecting the lance body and ejecting oxygen to supply oxygen for converter steelmaking, and the lance head body is a traditional Laval nozzle; the spray nozzle, the throat and the outlet are sequentially arranged in the gun head body, and the included angle formed by the spray nozzle and the central axis in the gun head body is 11.5 degrees; the diameter of the throat is 40.4mm, and the diameter of the outlet is 51.4 mm.
Compared with the prior art, the utility model has the beneficial effects that:
the converter oxygen lance equipment achieves the expected effect by researching and developing the structure of the oxygen lance nozzle and changing the diameter of the throat, the diameter of the outlet and the injection included angle; for example: the improved oxygen lance nozzle improves the oxygen supply intensity in the converter blowing process, shortens the pure oxygen supply time from the original 12 min 30 s-13 min 30 s to 9 min 30 s-10 min 30 s, and effectively shortens the smelting period; in addition, the expected effect is achieved from the perspective of slag melting effect and dephosphorization and decarburization effect;
the problem that the service life of the converter is influenced by brushing the furnace wall due to high oxygen supply strength is solved by adjusting the jet included angle.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.
FIG. 1 is a schematic structural view of a converter oxygen lance apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic structural view of a converter oxygen lance apparatus in the prior art.
FIG. 3 is a schematic view of the operation principle of a converter oxygen lance apparatus according to an embodiment of the utility model.
In the figure: 1-gun head body, 2-jet orifice, 3-throat orifice, 4-outlet, 5-welding seam, 6-water inlet pipe, 7-oxygen pipe, 8-gun body, 9-water discharge pipe and 10-flange.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Examples
Referring to fig. 1, the embodiment of the present invention provides a converter oxygen lance apparatus, which comprises:
the lance head body 1 is used for connecting the lance body 8 and ejecting oxygen to supply oxygen for converter steelmaking, and the lance head body 1 is a traditional Laval nozzle; the spray head comprises a gun head body 1, a spray nozzle 2, a throat 3 and an outlet 4, wherein the spray nozzle 2 and a central axis in the gun head body 1 form an included angle of 11.5 degrees; the diameter of the throat 3 is 40.4mm, and the diameter of the outlet 4 is 51.4 mm.
Comparative example
Referring to FIG. 2, in the prior art, there is provided a converter oxygen lance apparatus comprising:
the lance head body 1 is used for connecting the lance body 8 and ejecting oxygen to supply oxygen for converter steelmaking, and the lance head body 1 is a traditional Laval nozzle; a jet orifice 2, a throat 3 and an outlet 4 are sequentially arranged in the gun head body 1, and an included angle formed by the jet orifice 2 and a central axis in the gun head body 1 is 12 degrees; the diameter of the throat 3 is 37.5mm, and the diameter of the outlet 4 is 47.3 mm.
The working principle of the embodiment of the utility model is as follows:
referring to fig. 3, when the converter oxygen lance equipment is used, the lance head body 1 and the lance body 8 are welded and fixed together, and a welding seam 5 is formed at the welding position of the lance head body 1 and the lance body 8; then, an oxygen pipe 7 penetrates through the flange 10 and then extends into the gun body 8, and the end part of the oxygen pipe 7 extending into the gun body 8 is communicated with the gun head body 1; give rifle head body 1 through 7 oxygen suppliments of oxygen hose, and let in the cooling water through inlet tube 6 that 8 one sides of body of a gun set up, make the cooling water follow inlet tube 6 and get into from the discharge of drain pipe 9 position department, cool off oxygen rifle body, rifle head.
After oxygen enters the interior of the lance head body 1, the oxygen passes through the jet orifice 2 and the throat 3 in sequence and is ejected from the position of the outlet 4 for supplying oxygen for converter steelmaking;
the converter oxygen lance equipment is calculated according to the design specification of an oxygen lance nozzle through a large amount of data, and simultaneously the influence of increasing oxygen supply intensity on the cooling effect of a lance head is considered, and oxygen lance parameters are determined as follows:
| item | Diameter of throat | Diameter of outlet | Included angle | Total height | Mach number |
| Oxygen lance parameters | Φ40.4mm | Φ51.4mm | 11.5° | 295mm | 1.9-2.1 |
The oxygen lance equipment of the converter is redesigned, and the oxygen flow is from the original 17000m3/h-21000m3H is increased to 24000m3/h-27000m3H, oxygen supply intensity is from 4.1m3T is increased to 4.8m3Min; in addition, the influence of the change of oxygen supply strength of the oxygen lance on the service life of the furnace lining of the converter is considered, and the injection included angle is adjusted from the original 12 degrees to 11.5 degrees through tests, so that the erosion to the furnace wall is reduced, and the service life of the furnace lining is prolonged.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (1)
1. A converter oxygen lance device is characterized by comprising: the lance head body (1) is used for connecting the lance body (8) and ejecting oxygen to supply oxygen for converter steelmaking, and the lance head body (1) is a Laval nozzle; the spray gun head comprises a gun head body (1), and is characterized in that a spray opening (2), a throat opening (3) and an outlet (4) are sequentially formed in the gun head body (1), and an included angle formed by the spray opening (2) and a central axis in the gun head body (1) is 11.5 degrees; the diameter of the throat (3) is 40.4mm, and the diameter of the outlet (4) is 51.4 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122810162.XU CN216712155U (en) | 2021-11-17 | 2021-11-17 | Converter oxygen lance equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122810162.XU CN216712155U (en) | 2021-11-17 | 2021-11-17 | Converter oxygen lance equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216712155U true CN216712155U (en) | 2022-06-10 |
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ID=81879015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122810162.XU Active CN216712155U (en) | 2021-11-17 | 2021-11-17 | Converter oxygen lance equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216712155U (en) |
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2021
- 2021-11-17 CN CN202122810162.XU patent/CN216712155U/en active Active
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