CN110229941B - Double-station oxygen gun - Google Patents
Double-station oxygen gun Download PDFInfo
- Publication number
- CN110229941B CN110229941B CN201910522633.1A CN201910522633A CN110229941B CN 110229941 B CN110229941 B CN 110229941B CN 201910522633 A CN201910522633 A CN 201910522633A CN 110229941 B CN110229941 B CN 110229941B
- Authority
- CN
- China
- Prior art keywords
- pipe
- oxygen lance
- oxygen
- jacket
- lance body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 108
- 239000001301 oxygen Substances 0.000 title claims abstract description 108
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 37
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 37
- 239000007921 spray Substances 0.000 claims abstract description 35
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 14
- 239000000498 cooling water Substances 0.000 claims description 36
- 238000003466 welding Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims 1
- 239000002826 coolant Substances 0.000 abstract description 7
- 239000007789 gas Substances 0.000 abstract description 6
- 238000003723 Smelting Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- 238000009628 steelmaking Methods 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- 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
- C21C2005/4626—Means for cooling, e.g. by gases, fluids or liquids
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a double-station oxygen lance, which comprises an upper shell, an oxygen lance body, an injection pipe, a high-pressure spray pipe and a cooling device, wherein the upper shell is hollow, the upper end and the lower end of the upper shell are respectively provided with an air inlet and an air outlet, and the upper shell is communicated with an external carbon dioxide air source through a carbon dioxide air pipe; the oxygen lance body is in a vertically arranged cylinder shape, the lower end of the oxygen lance body is provided with an oxygen lance nozzle, the high-pressure spray pipe is vertically arranged above the oxygen lance body, the inside of the high-pressure spray pipe is respectively communicated with an external oxygen source and a nitrogen source through an oxygen pipe and a nitrogen pipe, and the lower end of the high-pressure spray pipe and the upper end of the oxygen lance body extend into the upper shell through an air inlet and an air outlet respectively; the injection pipe is vertically arranged in the upper shell and is positioned between the high-pressure spray pipe and the oxygen lance body. The double-working-medium oxygen lance can be used for injecting carbon dioxide by oxygen, the two gases are fully mixed in an injection pipe and an oxygen lance runner and then injected into a converter, and the carbon dioxide is used as a cooling agent for smelting the converter.
Description
Technical Field
The invention relates to the technical field of converter steelmaking technology, in particular to a double-station oxygen lance.
Background
The converter steelmaking technology uses molten iron, scrap steel and ferroalloy as main raw materials, generates heat by the physical heat of the molten iron and the chemical reaction of Si, C, P, S and the like in the molten iron with oxygen, removes generated impurities by slag forming materials such as quicklime, fluorite, dolomite and the like, and the redundant heat released by converter steelmaking is to control the temperature of molten steel by adding cooling agents such as iron ore, iron scale and the like in batches, wherein the converter steelmaking is the most important steelmaking mode and occupies more than 80% of the total steel yield in China, and has the advantages of high production efficiency, good steel grade quality, low production cost, low construction investment and the like.
The coolant added in the converter steelmaking process is divided into a plurality of batches, namely scrap steel is usually added in the initial stage of steelmaking, iron ore is usually added in batches in the steelmaking period, and the added iron ore can bring S, P, si and other impurities because the added iron ore and other coolants can not ensure the stable change of the temperature of molten steel in the converter, so that the carbon temperature hit rate of the molten steel is affected.
Carbon dioxide can be used as a substitute of the traditional steelmaking coolant, energy conservation and emission reduction can be realized, new impurities can not be introduced, but the carbon dioxide is used as the coolant, and a corresponding double-station oxygen lance is needed.
Disclosure of Invention
The invention provides a double-station oxygen lance capable of mixing oxygen and carbon dioxide and adding the mixed oxygen and carbon dioxide into a converter for solving the technical problems.
The technical scheme for solving the technical problems is as follows: the double-station oxygen lance comprises an upper shell, an oxygen lance body, an ejector pipe, a high-pressure spray pipe and a cooling device, wherein the interior of the upper shell is hollow, an air inlet and an air outlet are respectively arranged at the upper end and the lower end of the upper shell, the upper shell is communicated with an external carbon dioxide air source through a carbon dioxide air pipe, and a valve is arranged on the carbon dioxide air pipe; the oxygen lance body is in a cylinder shape which is vertically arranged, and an oxygen lance nozzle is arranged at the lower end of the oxygen lance body; the high-pressure spray pipe is vertically arranged above the oxygen lance body, the inside of the high-pressure spray pipe is hollow, the lower end of the high-pressure spray pipe is open, the inside of the high-pressure spray pipe is respectively communicated with an external oxygen source and a nitrogen source through an oxygen pipe and a nitrogen pipe, valves are arranged on the oxygen pipe and the nitrogen pipe, and the lower end of the high-pressure spray pipe and the upper end of the oxygen lance body extend into the upper shell through the air inlet and the air outlet respectively; the injection pipe is vertically arranged in the upper shell and is positioned between the high-pressure spray pipe and the oxygen lance body, an upper end opening of the injection pipe faces to a lower end opening of the high-pressure spray pipe, and a lower end of the injection pipe is connected and communicated with an upper end of the oxygen lance body; the cooling device is arranged outside the oxygen lance body and used for cooling the oxygen lance body.
The beneficial effects of the invention are as follows: the double-station oxygen lance can cool the molten steel of the converter by using the carbon dioxide, the carbon dioxide is injected by using the oxygen, and the two gases are injected into the converter after being fully mixed in the injection pipe and the oxygen lance runner, so that the cooling efficiency is improved.
On the basis of the technical scheme, the invention can be improved as follows.
Further, the cooling device comprises a first jacket and a second jacket, the first jacket is sleeved on the oxygen lance body, a cooling water inlet channel is formed between the first jacket and the oxygen lance body, the second jacket is sleeved on the first jacket, a cooling water return channel is formed between the second jacket and the first jacket, the lower end of the first jacket 61 is opened, so that the cooling water inlet channel is communicated with the lower end of the cooling water return channel, a cooling water inlet pipe communicated with the cooling water inlet channel is arranged on the outer wall of the first jacket, and a cooling water outlet pipe communicated with the cooling water return channel is arranged on the outer wall of the second jacket.
The water cooling device has the beneficial effects that the water cooling effect is good, and the water cooling efficiency is improved by adopting the double-layer jacket.
Further, the upper end of the first jacket is in sealed connection with the oxygen lance body through welding.
The beneficial effect of adopting above-mentioned further scheme is that make cooling device and oxygen rifle body be connected more firm, and the structure is simpler.
Further, the upper end of the second jacket is in sealing connection with the first jacket through welding, and the lower end of the second jacket is in sealing connection with the oxygen lance body through welding.
The beneficial effect of adopting above-mentioned further scheme is that make cooling device and oxygen rifle body be connected more firm, and the structure is simpler.
Further, the upper housing is cylindrical with a hollow interior.
Drawings
FIG. 1 is a schematic diagram of a duplex oxygen lance of the present invention;
in the drawings, the list of components represented by the various numbers is as follows:
10. the upper shell, 11, a carbon dioxide receiving chamber, 12, an air inlet, 13, an air outlet, 20, a carbon dioxide air pipe, 30, an oxygen lance body, 31, an oxygen lance runner, 32, an oxygen lance nozzle (32), 40, an injection pipe, 50, a high-pressure spray pipe, 51, an oxygen pipe, 52, a nitrogen pipe, 61, a first jacket, 62, a second jacket, 63, a cooling water inlet runner, 64, a cooling water return runner, 65, a cooling water inlet pipe, 66 and a cooling water outlet pipe.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings and specific embodiments, the examples being provided for illustration only and not for the purpose of limiting the invention.
As shown in fig. 1, the invention provides a duplex oxygen lance, which comprises an upper shell 10, an oxygen lance body 30, an injection pipe 40, a high-pressure spray pipe 50 and a cooling device, wherein the upper shell 10 is hollow to form a carbon dioxide receiving chamber 11, the upper end and the lower end of the carbon dioxide receiving chamber 11 are respectively provided with an air inlet 12 and an air outlet 13, the carbon dioxide receiving chamber 11 is communicated with an external carbon dioxide air source through a carbon dioxide air pipe 20, the carbon dioxide air source is stored in a carbon dioxide air tank, and a valve is arranged on the carbon dioxide air pipe 20; the oxygen lance body 30 is in a cylindrical shape which is vertically arranged, the interior of the oxygen lance body is hollow, the upper end and the lower end of the oxygen lance body are opened to form an oxygen lance flow passage 31, the lower end of the oxygen lance body 30 is provided with an oxygen lance nozzle 32, and the oxygen lance nozzle 32 is communicated with the oxygen lance flow passage 31; the high-pressure spray pipe 50 is vertically arranged above the oxygen lance body 30, the interior of the high-pressure spray pipe 50 is hollow, the lower end of the high-pressure spray pipe 50 is open, the upper end of the high-pressure spray pipe 50 is provided with a connecting port and is respectively communicated with an external oxygen source and a nitrogen source through an oxygen pipe 51 and a nitrogen pipe 52, the oxygen source and the nitrogen source are respectively stored in a high-pressure oxygen tank and a high-pressure nitrogen tank, valves are respectively arranged on the oxygen pipe 51 and the nitrogen pipe 52, and the lower end of the high-pressure spray pipe 50 and the upper end of the oxygen lance body 30 respectively extend into the carbon dioxide receiving chamber 11 through the air inlet 12 and the air outlet 13; the injection pipe 40 is vertically arranged in the carbon dioxide receiving chamber 11 and is positioned between the high-pressure spray pipe 50 and the oxygen lance body 30, the upper end opening of the injection pipe 40 faces the lower end opening of the high-pressure spray pipe 50, the lower end of the injection pipe 40 is connected and communicated with the upper end of the oxygen lance body 30, and the cooling device is arranged outside the oxygen lance body 30 and cools the oxygen lance body 30.
The working principle of the double-working-medium oxygen lance of the invention is as follows: in the early stage of converter smelting, the valve on the carbon dioxide gas pipe 20 is closed, the valve on the oxygen gas pipe 51 is only opened, oxygen is sprayed into the converter through the high-pressure spray pipe 50, the injection pipe 40, the oxygen gun runner 31 and the oxygen gun spray head 32 in sequence, so that the temperature of the converter is quickly increased, good foam slag is quickly formed along with the rise of the temperature of the converter and the addition of slag forming materials, the slag melting time of steelmaking is shortened, when the heat in the converter is rich and the coolant is required to be added in the middle stage of smelting, the valve of the carbon dioxide gas pipe 20 is opened, carbon dioxide is introduced into the carbon dioxide receiving chamber 11, oxygen is injected into the carbon dioxide receiving chamber 11 through the high-pressure spray pipe 50, so that the carbon dioxide and the oxygen are fully mixed in the injection pipe 40, and then sprayed into the converter through the oxygen gun runner 31 and the oxygen gun spray head 32, and in the later stage of smelting, the valve of the carbon dioxide gas pipe 20 is closed again, and only oxygen is blown into the converter.
The double-station oxygen lance can uniformly mix oxygen and carbon dioxide and then spray the mixture into the converter, has good cooling effect, does not need to pressurize the introduced carbon dioxide, and only needs to complete the mixing of gases through oxygen injection.
Preferably, the cooling device comprises a first jacket 61 and a second jacket 62, the first jacket 61 is sleeved on the oxygen lance body 30, a cooling water inlet channel 63 is formed between the first jacket 61 and the oxygen lance body 30, the second jacket 62 is sleeved on the first jacket 61, a cooling water return channel 64 is formed between the second jacket 62 and the first jacket 61, the lower end of the first jacket 61 is opened so that the cooling water inlet channel 63 is communicated with the cooling water return channel 64, a cooling water inlet pipe 65 communicated with the cooling water inlet channel 63 is arranged at the upper end of the outer wall of the first jacket 61, and a cooling water outlet pipe 66 communicated with the cooling water return channel 64 is arranged above the outer wall of the second jacket 62. The valve is arranged on the cooling water inlet pipe 65, the cooling water is led into the cooling water inlet flow passage 63 from the cooling water inlet pipe 65, after heat exchange with the oxygen lance body 30, flows into the outer-layer cooling water return flow passage 64 from the communication part of the cooling water inlet flow passage 63 and the cooling water return flow passage 64, flows out from the cooling water outlet pipe 66, cools the oxygen lance body 30, and can directly cool the oxygen lance in the initial stage, the middle stage and the later stage of smelting.
Preferably, the upper end of the first jacket 61 is closely connected to the oxygen lance body 30 by welding. The upper end of the second jacket 62 is in sealed connection with the first jacket 61 by welding, and the lower end of the second jacket 62 is in sealed connection with the oxygen lance body 30 by welding. The welding mode makes the connection of cooling device and oxygen rifle body 30 more firm, and the structure is simpler.
Preferably, the upper housing 10 is hollow cylindrical in the interior.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (3)
1. The double-station oxygen lance is characterized by comprising an upper shell (10), an oxygen lance body (30), an ejector pipe (40), a high-pressure spray pipe (50) and a cooling device;
the inside of the upper shell (10) is hollow, an air inlet (12) is formed in the upper end of the upper shell (10), an air outlet (13) is formed in the lower end of the upper shell (10), the upper shell (10) is communicated with an external carbon dioxide air source through a carbon dioxide air pipe (20), and a valve is arranged on the carbon dioxide air pipe (20);
the oxygen lance body (30) is in a cylindrical shape which is vertically arranged, and the lower end of the oxygen lance body is provided with an oxygen lance nozzle (32);
the high-pressure spray pipe (50) is vertically arranged above the oxygen lance body (30), the inside of the high-pressure spray pipe (50) is hollow, the lower end of the high-pressure spray pipe is open, the inside of the high-pressure spray pipe (50) is respectively communicated with an external oxygen source and a nitrogen source through an oxygen pipe (51) and a nitrogen pipe (52), valves are arranged on the oxygen pipe (51) and the nitrogen pipe (52), the lower end of the high-pressure spray pipe (50) extends into the upper shell (10) through the air inlet (12), and the upper end of the oxygen lance body (30) extends into the upper shell (10) through the air outlet (13);
the injection pipe (40) is vertically arranged in the upper shell (10) and is positioned between the high-pressure spray pipe (50) and the oxygen lance body (30), an upper end opening of the injection pipe (40) faces to a lower end opening of the high-pressure spray pipe (50), and a lower end of the injection pipe (40) is connected and communicated with an upper end of the oxygen lance body (30);
the cooling device is arranged outside the oxygen lance body (30) and used for cooling the oxygen lance body (30);
the upper housing (10) is cylindrical with a hollow interior.
2. The duplex oxygen lance according to claim 1, wherein the cooling device comprises a first jacket (61) and a second jacket (62), the first jacket (61) is sleeved on the oxygen lance body (30), a cooling water inlet channel (63) is formed between the first jacket (61) and the oxygen lance body (30), the second jacket (62) is sleeved on the first jacket (61), a cooling water return channel (64) is formed between the second jacket (62) and the first jacket (61), the lower end of the first jacket (61) is opened, so that the cooling water inlet channel (63) is communicated with the cooling water return channel (64), a cooling water inlet pipe (65) communicated with the cooling water inlet channel (63) is arranged on the outer wall of the first jacket (61), and a cooling water outlet pipe (66) communicated with the cooling water return channel (64) is arranged on the outer wall of the second jacket (62).
3. Double-working substance oxygen lance according to claim 2, characterized in that the upper end of the first jacket (61) is connected with the lance body (30) by welding in a closed manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522633.1A CN110229941B (en) | 2019-06-17 | 2019-06-17 | Double-station oxygen gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522633.1A CN110229941B (en) | 2019-06-17 | 2019-06-17 | Double-station oxygen gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110229941A CN110229941A (en) | 2019-09-13 |
| CN110229941B true CN110229941B (en) | 2024-04-16 |
Family
ID=67859463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910522633.1A Active CN110229941B (en) | 2019-06-17 | 2019-06-17 | Double-station oxygen gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110229941B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048563A (en) * | 1990-07-23 | 1991-01-16 | 冶金工业部攀枝花钢铁公司 | Process for smelting semisteel by combined blowing-double flow channel oxygen lance |
| KR20010000503U (en) * | 1999-06-11 | 2001-01-05 | 이구택 | Oxygen lance |
| CN102002551A (en) * | 2010-12-09 | 2011-04-06 | 中冶南方工程技术有限公司 | Double-channel oxygen lance |
| CN201923878U (en) * | 2010-12-17 | 2011-08-10 | 马翠忠 | Pulse injection internal circulation anaerobic reactor |
| CN206730895U (en) * | 2017-05-09 | 2017-12-12 | 北京科技大学 | A kind of steelmaking converter top blast gas mixer |
| CN210151149U (en) * | 2019-06-17 | 2020-03-17 | 武汉工程大学 | Double-working-medium oxygen lance |
-
2019
- 2019-06-17 CN CN201910522633.1A patent/CN110229941B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048563A (en) * | 1990-07-23 | 1991-01-16 | 冶金工业部攀枝花钢铁公司 | Process for smelting semisteel by combined blowing-double flow channel oxygen lance |
| KR20010000503U (en) * | 1999-06-11 | 2001-01-05 | 이구택 | Oxygen lance |
| CN102002551A (en) * | 2010-12-09 | 2011-04-06 | 中冶南方工程技术有限公司 | Double-channel oxygen lance |
| CN201923878U (en) * | 2010-12-17 | 2011-08-10 | 马翠忠 | Pulse injection internal circulation anaerobic reactor |
| CN206730895U (en) * | 2017-05-09 | 2017-12-12 | 北京科技大学 | A kind of steelmaking converter top blast gas mixer |
| CN210151149U (en) * | 2019-06-17 | 2020-03-17 | 武汉工程大学 | Double-working-medium oxygen lance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110229941A (en) | 2019-09-13 |
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