CN109161637B - Tornado oxygen gun - Google Patents
Tornado oxygen gun Download PDFInfo
- Publication number
- CN109161637B CN109161637B CN201810767819.9A CN201810767819A CN109161637B CN 109161637 B CN109161637 B CN 109161637B CN 201810767819 A CN201810767819 A CN 201810767819A CN 109161637 B CN109161637 B CN 109161637B
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- pipe
- shell
- welded
- streamline
- inner arc
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cyclones (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a tornado oxygen lance. The device comprises a streamline spray head, an inner arc rotational flow body and a plurality of rows of tangential air inlet holes on a thick wall, wherein each row of a plurality of tangential air inlet holes, an outer arc fluid gathering body, a warhead streamline body, an outer tube upper part, an outer tube lower part, a middle tube upper part, a middle tube lower part, an inner tube upper part, an inner tube lower part, a far infrared temperature measuring instrument, an element spectrum analyzer and a distance measuring instrument are arranged in an inner cavity formed by the inner arc fluid gathering body and the warhead fluid guiding body, and a forward included angle formed by the central line of the tangential air inlet holes and the axial. The invention has the advantages that the metallurgical process in the top-blown converter and the steelmaking electric furnace is monitored in real time and real-timely, and the aims of safety, high efficiency, high quality, energy conservation and emission reduction are ensured to be realized.
Description
Technical Field
The invention relates to an oxygen lance applied to an oxygen top-blown converter and a steelmaking electric furnace. In particular to a tornado oxygen lance, the air flow sprayed by the tornado oxygen lance is shot to the metal liquid surface in a furnace in a tornado motion state.
Background
The steel making is that the oxygen flow and the carbon in the molten iron generate strong carbon-oxygen chemical reaction, the carbon and other impurities in the molten iron are removed, the temperature of the molten iron is increased, and the molten iron is converted into the molten steel. The oxygen lance used at present is a multi-hole oxygen lance, and the motion form of oxygen flow is linear flow.
The defects of the porous oxygen lance are as follows:
① when the cross-sectional area of the oxygen lance outlet is constant, the total circumference of the multiple holes is much larger than that of the single hole and the total area of the walls of the holes.
② the end surface area of the multi-hole nozzle is large, it is shaped like a big washbasin, there is no element of any streamline body, the resistance to the hot air flow rising in the stove and the reflected flow is large, it is easy to burn the oxygen lance.
③ turbulence is generated between the porous air flows, which consumes the kinetic energy of the air flows and is easy to absorb the splashed iron liquid and slag liquid, which is an important reason for burning the nozzle.
④ the porous airflow has increased impact area on the metal liquid surface, but also reduced impact strength and depth, so that there is obvious dead zone in the bottom and around the bottom where the oxygen flow can not impact, and some units adopt top-bottom combined blowing process as evidence of the dead zone.
⑤ because the furnace is full of various complex physical and chemical reactions, the high temperature smoke generated during the reaction period makes people unable to explore the real situation of the reaction in the furnace so far.
Through search, only the patent number Z L201010535538.4 invented by the applicant, named as 'powerful tornado generator', has the performance of generating tornados.
Inspired by the inventor to analyze the motion form of tornado in nature; after water in the water tank is stirred by a wood stick, the study on the motion form of the tornado is formed; the understanding of the advanced streamline concepts of the fifth generation fighter aircraft nose and the sweepback wing form the concept and scheme of the invention.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides a tornado oxygen lance for an oxygen top-blown converter and a steelmaking electric furnace, which enables tornado airflow ejected by the oxygen lance to rotate at a high speed and advance, and jets the tornado airflow to a metal liquid surface under the action of strong impact force, penetrating force and stripping, thereby achieving the purposes of safety, high efficiency, high quality, energy conservation and emission reduction.
In order to achieve the purpose, the invention comprises the following steps: an oxygen lance comprising: the device comprises a streamline-shaped spray head, a plurality of rows of inner arc rotational flow bodies and thick walls thereof, a plurality of tangential air inlets in each row, an outer arc gathering body, a warhead flow deflector, an outer pipe, a middle pipe, an inner pipe, a far infrared thermometer, an element spectrum analyzer and a distance meter.
The concrete structure mode is as follows: the streamline part of the streamline spray head is welded with the lower part of the outer pipe and then welded with the upper part of the outer pipe, and the outer part of the taper hole of the streamline spray head is connected with the thread of the inner arc rotational flow body; (ii) a The cylindrical part of the inner arc rotational flow body is welded with the lower part of the middle pipe; the conical part of the inner arc rotational flow body is welded with the lower part of the inner pipe; the lower part of the inner pipe is welded with the upper part of the inner pipe; an inner arc rotational flow body and a warhead flow guide body are fixedly arranged in an inner cavity formed by the inner arc rotational flow body; the inner arc rotational flow body and the outer arc gathering fluid, and the warhead flow guide body is mutually in threaded connection with the far infrared thermometer, the element spectrum analyzer and the distance measuring machine and is arranged in an inner cavity formed by the outer arc gathering fluid and the warhead flow guide body to form a whole.
A plurality of rows of tangential air inlet holes are formed in the thick wall of the inner arc rotary fluid, and the included angle between the center line of each tangential air inlet hole and the axial line is 3-20 degrees forward.
The oxygen flow can enter the tangential air inlet hole through a channel formed by the inner walls above and below the inner tube, the outer cambered surface of the warhead flow guide body and the conical surface of the inner arc rotational flow body.
The oxygen flow enters a space formed by the inner arc surface of the inner arc rotational flow body and the outer arc surface of the outer arc polymer fluid through the tangential holes to form tornado oxygen flow, and then the tornado oxygen flow is emitted to the metal liquid surface in the furnace through the taper hole of the streamline-shaped spray head.
The outer walls of the lower part of the inner pipe and the upper part of the inner pipe, the inner wall of the upper part of the middle pipe and the lower part of the middle pipe and the water outlet below the middle pipe form a cooling water inlet channel.
The outer wall of the middle pipe below and on the middle pipe and the inner wall of the streamline-shaped spray head streamline part and the inner wall of the outer pipe below and on the outer pipe form a drainage channel.
The far infrared temperature measuring instrument, the element spectrum analyzer and the distance measuring instrument are arranged in an inner cavity formed by the outer arc fluid gathering body and the warhead fluid guiding body, and the smelting condition in the furnace is monitored in real time in the whole process through a central hole of the outer arc fluid gathering body.
According to the inventive concept, the invention adopts the following technical scheme: a tornado oxygen lance comprises a lance body which is composed of a four-layer shell with an oxygen inlet at the upper end, a cooling water inlet and outlet and a streamline nozzle at the lower end, and is characterized in that the four-layer shell has the following structure:
1) the core layer casing comprises an inner arc rotational flow body structure connected with a warhead flow guide body: the streamline part of the streamline spray head is welded with the lower part of the outer pipe and then welded with the upper part of the outer pipe; the outer part of the inner cone hole of the streamline spray head is in threaded connection with an inner arc rotational flow body with a thick wall provided with a tangential air inlet; the cylindrical part of the inner arc rotational flow body is welded with the lower part of the middle pipe; the cylindrical part of the inner arc rotational flow body is welded with the lower part of the inner pipe; the lower part of the inner pipe is welded with the upper part of the inner pipe, and an inner arc rotational flow body and a warhead flow guide body are fixedly arranged in an inner cavity formed by the inner pipe; the inner arc rotational flow body and the outer arc polymer fluid; the warhead flow deflectors are connected with each other through threads. The lower part of the middle pipe is welded with the cylindrical bottom of the inner arc rotational flow body and then is formed with the inner pipe, and an inner arc polymer fluid is fixedly arranged in the inner cavity of the middle pipe;
2) the inner shell is welded with the lower part of an inner tube from the upper part of the inner tube, oxygen circulation is formed between the inner shell and the core shell, and the upper end of the inner tube is connected with an oxygen inlet;
3) the middle layer shell is formed by welding a middle pipe on the middle pipe and welding a middle pipe under the middle pipe, a water inlet flow channel is formed between the middle layer shell and the inner layer shell, the upper end of the middle layer shell is connected with a water inlet, and the lower end of the middle layer shell is communicated with a water return flow channel;
4) the outer shell is formed by welding the lower part of an outer pipe with the streamline part of the streamline spray head and welding the lower part of the outer pipe on the outer shell, a backwater flow passage is formed between the outer shell and the middle shell, and the upper end of the backwater flow passage is connected with a water outlet;
5) the oxygen outlet is a streamline nozzle; the upper end of the spray pipe is connected with the lower end of the inner arc rotational flow body, and the lower end of the spray pipe is welded with the lower part of the outer pipe through a flow line part of the flow line nozzle and is welded with the outer pipe.
The inner arc rotational flow body thick wall of the tornado oxygen lance is provided with a plurality of rows, each row of the plurality of tangential air inlet holes, and the central line of the air inlet and the central line of the shaft form a forward included angle of 3-20 degrees. And a far infrared temperature measuring instrument, an element spectrum analyzer and a distance measuring instrument are arranged in an inner cavity formed by the inner arc polymer fluid and the bullet flow guide body.
The operating mechanism of the tornado oxygen lance is as follows:
oxygen flows through the inner arc surface of the channel tangential inner arc rotational flow body [0014], and rotates and moves forwards along the direction of an included angle between the central line of the tangential hole and the axial lead in a cavity between the inner arc surface and the outer arc surface of the outer arc fluid. Because the linear velocity of each air stream particle is equal but at a substantially different radius. Therefore, the pressure is higher as the angular velocity and the axial velocity of the gas flow at the position with the larger radius are smaller, and conversely, the pressure is lower as the angular velocity and the axial velocity of the gas flow at the position with the smaller radius are larger. A pressure gradient pointing to the circle center is formed, the pressure direction is towards the center and the front, and meanwhile, the tangential direction of each airflow particle is also pointing to the center and the front when the inner arc surface is rushed down. Therefore, the friction force between the airflow and the inner cambered surface and the outer cambered surface tends to be zero, and the noise is greatly reduced. The strong tornado gathered into a bundle is sprayed by the conical holes to have special impact force, penetrating force and stripping effect.
The molten metal operation mechanism caused by the jet of the tornado oxygen flow on the molten metal in the furnace is as follows:
tornado oxygen flow is sprayed to the metal liquid surface in a high-speed rotating mode, the torsion generated by the rotation of the tornado oxygen flow is almost the tension and the resistance of the metal liquid surface which is directly cut in the horizontal direction, so that the oxygen flow slightly and loosely penetrates into the metal liquid, and the liquid surface which drives the metal liquid to rotate forms funnel-shaped vortex quickly. The tornado effect of the stirring device is like that water in a water tank after stirring generates countless Archimedes spiral lines of accelerated speed pointing to the circle center on the rotating funnel-shaped metal liquid surface. Meanwhile, the oxygen and the carbon element in the molten metal undergo a violent oxidation reaction, and generate a large amount of carbon dioxide and carbon monoxide gas and huge heat energy and kinetic energy to continue to rotate and impact the molten metal in the molten pool, so that the molten metal moves along the rotating direction given by the oxygen flow and spreads into a downward funnel-shaped impact range. Therefore, the molten metal in the furnace bottom area is pressed to be diffused in a rotating mode, the molten metal rises along the position near the furnace wall in a rotating mode, the height of the funnel-shaped liquid level is further raised, the molten metal is pressed to the center through higher potential energy, meanwhile, the molten metal is further pressed to the center in a rotating mode with new and huge heat energy and kinetic energy which are continuously generated, the molten metal in the furnace bottom area is pressed to be diffused in a rotating mode, the molten metal continues to rise along the position near the furnace wall in a rotating mode, and therefore the molten metal moves in a reciprocating circulating mode. Effectively avoiding the occurrence of reflection flow and splash phenomena.
When various solid alloys are put into the molten pool, the solid alloys sink along with the rotation of molten metal and are continuously melted. Uniformly dispersed in the molten metal.
The molten metal generates slag which is light, so that the slag can easily float to the liquid level in the rotating molten metal and can only rotatably float around the upper part of the funnel-shaped liquid level, and the slag can not be stirred into the molten metal again, thereby being particularly beneficial to the purification of the molten metal.
The carbon dioxide and carbon monoxide gas losing kinetic energy can more easily rotate and rise along the vicinity of the furnace wall to be discharged out of the furnace.
A far infrared temperature measuring instrument is arranged in an inner cavity formed by the outer arc polymer fluid and the bullet fluid guide body, and the element spectrum analyzer and the distance measuring instrument can coordinate the optimal distance between the streamline-shaped spray head and the molten metal and the intensity of the sprayed oxygen flow at any time; and (4) mastering the temperature and chemical composition change of the molten metal, and determining final temperature and end point carbon data. And realizing the real-time live report of the information in the furnace.
Compared with the prior art, the invention has the following obvious substantive characteristics and obvious advantages: the invention makes the oxygen lance airflow rotate at high speed and advance, and the oxygen lance airflow is shot to the metal liquid surface under the action of strong impact force, penetrating force and stripping force, thereby achieving safe, high-efficiency, high-quality, energy-saving and emission-reduction steelmaking.
Drawings
The invention is described in further detail below with reference to the figures and the detailed description.
Fig. 1 is a cross-sectional view of the structure of the present invention.
FIG. 2 is a cross-sectional view of the tangential air inlet holes A-A in the wall thickness of the inner arc cyclone body of the present invention.
FIG. 3 is a cross-sectional view of the tangential air inlet holes B-B in the wall thickness of the inner arc cyclone body of the present invention.
Detailed Description
The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings:
the first embodiment is as follows: referring to fig. 1-3, the tornado oxygen lance comprises a lance body which is composed of a four-layer shell with an oxygen inlet at the upper end, a cooling water inlet and outlet and an oxygen nozzle at the lower end, and is characterized in that the four-layer shell has the structure that:
1) the core layer casing comprises an inner arc rotational flow body structure connected with a warhead flow guide body: the streamline part of the streamline nozzle is welded with the lower part of the outer pipe and then welded with the upper part of the outer pipe; the outer part of the inner cone hole of the streamline spray head is in threaded connection with an inner arc rotational flow body with a thick wall provided with a tangential air inlet; the lower part of the middle pipe is welded with the cylindrical bottom of the inner arc rotational flow body, the inner arc rotational flow body and the warhead flow guide body form an inner cavity, and an outer arc fluid gathering body is installed;
2) the inner shell is welded with the lower part of an inner tube from the upper part of the inner tube, an oxygen flow channel is formed between the inner shell and the core shell, and the upper end of the inner tube is connected with an oxygen inlet;
3) the middle layer shell is formed by welding a middle pipe on the middle pipe and welding a middle pipe under the middle pipe, a water inlet flow channel is formed between the middle layer shell and the inner layer shell, the upper end of the middle layer shell is connected with a water inlet, and the lower end of the middle layer shell is communicated with a water return flow channel;
4) the outer shell is formed by welding an outer pipe on the outer pipe and welding an outer pipe under the outer pipe, a water return flow channel is formed between the outer shell and the middle shell, and the upper end of the outer shell is connected with a water outlet;
5) the oxygen nozzle is a streamline nozzle; comprises a conical spray pipe, the upper port of the conical spray pipe is connected with the lower port of the inner arc rotational flow body, and the lower end of the conical spray pipe is welded with the lower part of the outer pipe through a streamline shell.
Example two: this embodiment is substantially the same as the first embodiment, and is characterized in that: the inner arc rotational flow body thick wall of the tornado oxygen lance is provided with a plurality of rows, each row of the plurality of tangential air inlet holes, and the central line of the air inlet and the central line of the shaft form a forward included angle of 3-20 degrees. And a far infrared temperature measuring instrument, an element spectrum analyzer and a distance measuring instrument are arranged in an inner cavity formed by the outer arc polymer fluid and the bullet flow guide body.
As can be seen from the attached figure 1, the invention relates to a tornado oxygen lance, which structurally comprises a streamline part of a streamline nozzle 1, a lower part 3 of an outer pipe and an upper part 8 of the outer pipe, wherein the streamline part is welded with the lower part of the outer pipe; the outer part of the inner taper hole of the streamline nozzle 1 is in threaded connection with the inner arc rotational flow body 5; the inner arc rotational flow body 5 is in threaded connection with the outer arc fluid collector 6 and the warhead fluid deflector 7; the lower middle pipe 2 is welded with the cylindrical bottom of the inner arc rotational flow body 5 and then is welded with the upper inner pipe 9; the lower part 4 of the inner pipe is welded with the conical column part of the inner arc rotational flow body 5 and then is welded with the upper part 10 of the inner pipe; the far infrared thermometer 11, the element spectrum analyzer 12 and the distance meter 13 are arranged in an inner cavity formed by the inner arc polymer fluid 6 and the warhead deflector 7 to form the tornado oxygen lance.
As can be seen from the attached figures 1, 2 and 3, a plurality of rows of tangential air inlet holes 14 and 15 are formed in the thick wall of the inner arc cyclone 5, and the included angle between the central hole of each air inlet hole and the axial line is 3-20 degrees.
Claims (3)
1. The utility model provides a tornado oxygen rifle, includes the rifle body that the four-layer shell that has oxygen air inlet and cooling water inlet outlet and lower extreme to have streamlined shower nozzle (1) constitutes that an upper end, its characterized in that, four-layer shell structure is:
1) the core layer shell is formed by connecting a warhead flow guide body (7) with an inner arc rotational flow body (5), and the flow line part of the streamline-shaped spray head (1) is welded with the lower part (3) of the outer pipe and then welded with the upper part (8) of the outer pipe; the outside of a taper hole of the streamline nozzle (1) is in threaded connection with an inner arc rotational flow body (5) with a thick wall provided with a tangential air inlet hole; the cylindrical part of the inner arc rotational flow body (5) is welded with the lower part (2) of the middle pipe; the conical part of the inner arc rotational flow body (5) is welded with the lower part (4) of the inner pipe; the lower part (4) of the inner pipe is welded with the upper part (10) of the inner pipe; an inner arc rotational flow body (5) and a warhead flow guide body (7) are fixedly arranged in an inner cavity formed by the inner arc rotational flow body; the inner arc rotational flow body (5) is in threaded connection with the outer arc fluid gathering body (6) and the warhead flow guide body (7); the inner shell is welded with an inner tube upper part (10) and an inner tube lower part (4), an oxygen flow channel is formed between the inner shell and the core layer shell, and the upper end of the inner tube upper part (10) is connected with an oxygen inlet;
2) the middle layer shell is formed by welding a middle pipe upper part (9) and a middle pipe lower part (2), a water inlet flow channel is formed between the middle layer shell and the inner layer shell, the upper end of the middle layer shell is connected with a water inlet, and the lower end of the middle layer shell is communicated with a water return flow channel;
3) the outer shell is formed by welding a lower outer tube (3) and a streamline part of the streamline forming nozzle (1) and welding an upper outer tube (8) on the outer shell, a backwater flow channel is formed between the outer shell and the middle shell, and the upper end of the outer shell is connected with a water outlet;
4) the oxygen outlet is a streamline nozzle (1); comprises a spray pipe, the upper port of the spray pipe is connected with the lower port of an inner arc rotational flow body (5), and the lower end of the spray pipe is welded with the lower part (3) of an outer pipe through a flow line part of a streamline-shaped spray head (1) and then welded with the upper part (8) of the outer pipe.
2. A tornado lance as claimed in claim 1 wherein: the inner arc rotational flow body (5) is provided with a plurality of rows of tangential air inlet holes (14, 15) on the thick wall, and the central lines of the air inlet holes (14, 15) and the axial central line form a forward included angle of 3-20 degrees.
3. A tornado lance as claimed in claim 1 wherein: and a far infrared temperature measuring instrument (11), an element spectrum analyzer (12) and a distance measuring instrument (13) are arranged in an inner cavity formed by the outer arc polymer fluid (6) and the bullet flow guide body (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810767819.9A CN109161637B (en) | 2018-07-13 | 2018-07-13 | Tornado oxygen gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810767819.9A CN109161637B (en) | 2018-07-13 | 2018-07-13 | Tornado oxygen gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109161637A CN109161637A (en) | 2019-01-08 |
| CN109161637B true CN109161637B (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810767819.9A Active CN109161637B (en) | 2018-07-13 | 2018-07-13 | Tornado oxygen gun |
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| Country | Link |
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| CN (1) | CN109161637B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3112194A (en) * | 1960-10-19 | 1963-11-26 | Union Carbide Corp | Molten bath treating method and apparatus |
| US4928605A (en) * | 1985-11-15 | 1990-05-29 | Nippon Sanso Kabushiki Kaisha | Oxygen heater, hot oxygen lance having an oxygen heater and pulverized solid fuel burner |
| CN1141422A (en) * | 1995-07-27 | 1997-01-29 | 陈朝云 | Multi-stage cyclone generator |
| CN201858659U (en) * | 2010-11-09 | 2011-06-08 | 陈朝云 | Strong tornado generator |
-
2018
- 2018-07-13 CN CN201810767819.9A patent/CN109161637B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3112194A (en) * | 1960-10-19 | 1963-11-26 | Union Carbide Corp | Molten bath treating method and apparatus |
| US4928605A (en) * | 1985-11-15 | 1990-05-29 | Nippon Sanso Kabushiki Kaisha | Oxygen heater, hot oxygen lance having an oxygen heater and pulverized solid fuel burner |
| CN1141422A (en) * | 1995-07-27 | 1997-01-29 | 陈朝云 | Multi-stage cyclone generator |
| CN201858659U (en) * | 2010-11-09 | 2011-06-08 | 陈朝云 | Strong tornado generator |
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| CN109161637A (en) | 2019-01-08 |
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