CN202430244U - Tuyere for pure oxygen smelting - Google Patents
Tuyere for pure oxygen smelting Download PDFInfo
- Publication number
- CN202430244U CN202430244U CN2011205204844U CN201120520484U CN202430244U CN 202430244 U CN202430244 U CN 202430244U CN 2011205204844 U CN2011205204844 U CN 2011205204844U CN 201120520484 U CN201120520484 U CN 201120520484U CN 202430244 U CN202430244 U CN 202430244U
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- air port
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- pure oxygen
- tuyere
- interpolation pipe
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Abstract
The utility model discloses a tuyere for pure oxygen smelting. The tuyere comprises a tuyere body, a first passage is arranged in the tuyere body, the tuyere body is further provided with a nitrogen inlet which is communicated with the first passage through a branch pipe, an inner inserting pipe is arranged in the first passage, an annular passage is formed between the outer wall of the inner inserting pipe and the inner wall of the first passage, the inner inserting pipe is communicated with oxygen, the annular passage is communicated with the nitrogen inlet through the branch pipe, and the front end of the inner wall of the first passage is in hermetical connection with the front end of the outer wall of the inner inserting pipe.
Description
Technical field
The utility model relates to a kind of smelting supplementary unit, relates in particular to a kind of air port.
Background technology
COREX (VAI exploitation a kind of uses lump ore or pellet to make raw material, uses mill coal to make the ironmaking technique of fusion and reduction of reductive agent and fuel) is the real so far industrialized ironmaking technique of fusion and reduction of realizing.In the COREX iron-smelting process, owing to adopt the pure oxygen air blast, its air port oxygen flow is less than hot blast (oxygen enrichment) air blast of blast furnace, causes blast energy to descend.Calculate according to the circle round experimental formula of district's degree of depth of COREX, the air port district's degree of depth of circling round has only about 0.7～0.8 meter, less than the district's degree of depth of circling round with about 1.5 meters in hot blast (oxygen enrichment) the air blast blast furnace of cupola well diameter.In addition because COREX adopts the pure oxygen air blast, its theoretical tuyere combustion temperature up to 3900 ℃ about, far above the theoretical tuyere combustion temperature of about 2200 ℃ in traditional hot blast (oxygen enrichment) air blast blast furnace.According to the radiative transfer equation, radiogenic heat is the quadruplicate function of temperature, and COREX circles round and distinguishes flame radiaton heat 10 times for blast furnace.It is shorter to add the district's degree of depth of circling round, and causes flame beacon face more near the air port, and air port Working environment of living in is very abominable, therefore causes the air port damaged than being easier to.
Fig. 1 has shown the structure in existing air port.As shown in Figure 1, the central axis of tuyere body offers oxygen channel A, in order to oxygen is blasted in the stove, burns with coal, Jiao.Around oxygen channel A, be provided with four cooling-water duct B, the air port cooled off in order to feed water coolant.The air port internal cavity separates with dividing plate, is ante-chamber near stove cavity partly, and spiral deflector is located in the ante-chamber, in order to raising water coolant flow velocity, thus the cooling performance of raising water coolant.Although existing air port has adopted water coolant that the air port is cooled off, effect is unsatisfactory.Therefore, in order to improve the air port life-span, need further the air port to be improved.
The main path that improves at present the air port life-span is for improving the air port material and to carrying out surface Hardening Treatment in the air port, but these methods are as far as using the air port poor effect of pure oxygen air blast.
In addition, the method that also has is to wait the life-span of improving the air port through reducing powder rate, raising semicoke bed liquid permeability, the single air port of the reduction smelting intensity of going into stove lump coal, though these methods have obtained certain effect, the air port is still shorter work-ing life.
Summary of the invention
The purpose of the utility model provides a kind of air port that is used for pure oxygen smelting, and this air port should reduce the inlet front end temperature of combustion, and can prevent washing away of high temperature dust gyration airflow, thereby improves the Working environment in air port, improves the work-ing life in air port.
According to the foregoing invention purpose; The utility model provides a kind of air port that is used for pure oxygen smelting; It comprises a tuyere body, is provided with a first channel and another gas feed in the said tuyere body, and said another gas feed is through an arm and said first channel conducting; Wherein:
Be provided with an interpolation pipe in the said first channel, form a circular channel between the outer wall of said interpolation pipe and the inwall of first channel; Said interpolation pipe has an inlet end and an outlet side; Said circular channel is through said arm and another gas feed conducting; The inwall front end of said first channel is connected with the outer wall forward end seal of interpolation pipe.
When using the described air port that is used for pure oxygen smelting of present technique scheme, high purity oxygen gas gets in the stove from interpolation pipe, and nitrogen gets into the circular channel between interpolation pipe outer wall and the first channel inwall from another gas feed through arm, then through in the circular channel entering stove.Oxygen in being blown into stove after, with burnings such as coal, Jiao, emit a large amount of heats.Being blown on the one hand of nitrogen forms circle nitrogen air curtain, directly a cooling down high-temperature air-flow outside the interpolation pipe in the air port; In the time of on the other hand in being blown into stove, can with oxygen mix, reduce oxygen concentration, thereby reduce the incendiary temperature; In addition, the nitrogen that blows out of circular channel can also avoid the dust-contained airflow of high temperature and high speed that the air port is corroded.
Preferably, in the above-mentioned air port that is used for pure oxygen smelting, the radial section of said circular channel long-pending for the radial section of interpolation pipe long-pending 15%.
The described air port that is used for pure oxygen smelting of the utility model has advantage than traditional air port:
(1) the described air port that is used for pure oxygen smelting of the utility model is through the said structure design; Make nitrogen can blast vapourizing furnace by the air port with oxygen; Thereby reduce the temperature of combustion of inlet front end; And the dust-contained airflow that circles round that can prevent high temperature and high speed corrodes the air port, thereby improves the residing Working environment in air port, prolonged air port work-ing life;
(2) the damping down time of smelting reduction process can be reduced in the described air port that is used for pure oxygen smelting of the utility model, thereby improves the operating rate of equipment, has reduced recondition expense and the consumption of producing spare part;
(3) the described air port that is used for pure oxygen smelting of the utility model can also stably manufactured, reduces the molten steel quality fluctuation, thereby has improved the molten steel quality qualification rate.
Description of drawings
Fig. 1 is the structural representation in existing air port.
Fig. 2 is the described structural representation of air port under a kind of embodiment that is used for pure oxygen smelting of the utility model.
Embodiment
To combine Figure of description and concrete embodiment that further detailed description is done in the described air port that is used for pure oxygen smelting of the utility model below.
Fig. 2 has shown the described air port structure in the present embodiment that is used for pure oxygen smelting of utility model.As shown in Figure 1, tuyere body is provided with first channel 1.Interpolation pipe 2 is located in the first channel 1, and it is used for logical oxygen.The inwall of the outer wall of interpolation pipe 2 and first channel 1 surrounds a circular channel 3, the radial section of circular channel 3 long-pending for the radial section of interpolation pipe 2 long-pending 15%.Tuyere body is provided with gas feed (for nitrogen inlet) 4, and arm 5 conductings are passed through with gas feed 4 in circular channel 3.The inwall front end of first channel 1 and the outer wall front end of interpolation pipe 2 are tightly connected through an O type circle 6.
Please continue to consult Fig. 2, when using the described air port that is used for pure oxygen smelting of the utility model, high purity oxygen gas gets in the stoves from interpolation pipe 2, and nitrogen, gets in the stoves through circular channel 3 through arm 5 entering circular channels 3 from gas feed 4 then.The nitrogen pressure that is blown into is higher 0.2～1 times than oxygen pressure.Oxygen in being blown into stove after, with burnings such as coal, Jiao, emit a large amount of heats; Being blown into of nitrogen forms circle nitrogen air curtain, directly a cooling down high-temperature air-flow on the one hand outside the interpolation pipe 2 in the air port simultaneously; In the time of on the other hand in being blown into stove and oxygen mix, reduce oxygen concentration, thereby reduce the incendiary temperature; In addition, the nitrogen that blows out of circular channel 3 can also avoid the dust-contained airflow of high temperature and high speed that the air port is corroded.
Be noted that the above specific embodiment of enumerating that is merely the utility model, obviously the utility model is not limited to above embodiment, and many similar variations are arranged thereupon.If those skilled in the art from all distortion that the disclosed content of the utility model directly derives or associates, all should belong to the protection domain of the utility model.
Claims (2)
1. air port that is used for pure oxygen smelting, it comprises a tuyere body, is provided with a first channel and another gas feed in the said tuyere body, said another gas feed is through an arm and said first channel conducting; It is characterized in that:
Be provided with an interpolation pipe in the said first channel, form a circular channel between the outer wall of said interpolation pipe and the inwall of first channel; Said interpolation pipe has an inlet end and an outlet side; Said circular channel is through said arm and another gas feed conducting; The inwall front end of said first channel is connected with the outer wall forward end seal of interpolation pipe.
2. the air port that is used for pure oxygen smelting as claimed in claim 1 is characterized in that, the radial section of said circular channel long-pending for the radial section of interpolation pipe long-pending 15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205204844U CN202430244U (en) | 2011-12-14 | 2011-12-14 | Tuyere for pure oxygen smelting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205204844U CN202430244U (en) | 2011-12-14 | 2011-12-14 | Tuyere for pure oxygen smelting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202430244U true CN202430244U (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205204844U Expired - Fee Related CN202430244U (en) | 2011-12-14 | 2011-12-14 | Tuyere for pure oxygen smelting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202430244U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112522462A (en) * | 2020-11-06 | 2021-03-19 | 刘兰英 | Blast furnace for smelting iron material |
-
2011
- 2011-12-14 CN CN2011205204844U patent/CN202430244U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112522462A (en) * | 2020-11-06 | 2021-03-19 | 刘兰英 | Blast furnace for smelting iron material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BAOGANG GROUP CO., LTD. Free format text: FORMER OWNER: BAOSHAN IRON + STEEL CO., LTD. Effective date: 20121231 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201900 BAOSHAN, SHANGHAI TO: 200122 PUDONG NEW AREA, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121231 Address after: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Patentee after: Baosteel Group Corporation Address before: 201900 Fujin Road, Shanghai, No. 885, No. Patentee before: Baoshan Iron & Steel Co., Ltd. |
|
| 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: 20120912 Termination date: 20201214 |