CN1225314C - Oxygen blowing apparatus for smelting steel, technology and application - Google Patents
Oxygen blowing apparatus for smelting steel, technology and application Download PDFInfo
- Publication number
- CN1225314C CN1225314C CNB021004668A CN02100466A CN1225314C CN 1225314 C CN1225314 C CN 1225314C CN B021004668 A CNB021004668 A CN B021004668A CN 02100466 A CN02100466 A CN 02100466A CN 1225314 C CN1225314 C CN 1225314C
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- oxygen
- fuel
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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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Abstract
The present invention relates to an oxygen blowing device for smelting steel, a technique and applications, which is especially suitable for smelting steel in an electric furnace. The oxygen blowing device is a bundling flow-jetting oxygen lance. The oxygen blowing device is characterized in that a main oxygen protective system is arranged at the outer layer of a main oxygen flow-jetting channel (1); the main oxygen protective system is composed of a fuel spraying and blowing pipe (7), an auxiliary oxygen inlet (8) and a fuel inlet (9). The bundling flow-jetting oxygen spray lance is arranged on the furnace wall, and the oxygen spray lance is arranged at the position where has the distance of more than 400 to 1000mm with a slag line to blow oxygen. The technique uses gases generated by that gaseous fuel or liquid fuel and secondary oxygen are burnt as protective gases, and the original impact force and the speed of the oxygen in a main pipe can be still kept in the distance of 800 to 2000mm from the outlet of the spray lance. The strength and the speed of the oxygen of the main pipe are large, so quick mixing can be realized, the penetration capability of a molten pool is strengthened, the quick decarbonization is carried out, and the utilization rate of the oxygen is increased. The device has the functions of burning fuel, cutting scrap steel, fluxing and reburning CO (secondly burning) in the furnace under the condition of ensuring favorable decarbonization effects.
Description
Technical field:
The invention belongs to field of steel-making, be specially adapted to Electric furnace steel making.
Background technology:
Common supersonic jet is normally adopted in Electric furnace steel making furnace wall oxygen blast now, because the velocity attenuation of supersonic jet is fast, short and the dispersion relatively of jet winding-up distance, when jet arrives the molten bath, a little less than the lower and surging force of speed, can not penetrate weld pool surface and carry out effective decarburizing reaction, the availability of oxygen is low, also can't cut iron and steel scrap and flux.
Summary of the invention:
A kind of oxygen blowing apparatus for smelting steel and technology, equipment is a kind of cluster fluidic oxygen gun, comprise main oxygen fluidic channel 1, water inlet tap 2, faucet 3, water inlet pipe 4, rising pipe 5, oxygen spray orifice 6, it is characterized in that main oxygen fluidic channel 1 skin is provided with main oxygen securing system, main oxygen securing system is entered mouth 9 and is formed by fuel winding-up pipe 7, secondary oxygen inlet 8, fuel; The cluster fluidic spray gun is arranged on the furnace wall, and spray gun carries out oxygen blast in the position of the above 400-1000mm of slag line; Gas on the technology after the burning of employing geseous fuel and secondary oxygen is as shielding gas, and total oxygen flow is 1000-10000Nm
3/ h, the total pressure of jet pipe oxygen inlet is 0.30-1.5Mpa, fuel winding-up amount is 100Nm
3/ h-2000Nm
3/ h.
Aforesaid oxygen blowing apparatus and technology is characterized in that on the technology adopting gas after liquid fuel and the burning of secondary oxygen as shielding gas, and fuel winding-up amount is 100kg/h-2000kg/h.
The present invention compares with existing supersonic velocity oxygen rifle; its advantage is to use gas after the burning of combustion gas (oil) and secondary oxygen as shielding gas; can make main oxygen be in the rough vacuum condition; main oxygen and subsidiary oxygen space gas concentration reduce greatly; for the winding-up of being responsible for oxygen provides good condition, therefore can make in the distance of spray gun outlet 800-2000mm still to keep being responsible for original surging force of oxygen and speed.Because it is all bigger to be responsible for the intensity and the speed of oxygen, can reach short mix, molten bath penetrativity grow, quick decarburization has improved the utilising efficiency of oxygen.
A kind of purposes of oxygen blowing apparatus for smelting steel is characterized in that this equipment is guaranteeing under the good decarburization effect prerequisite, have also that fuel combustion cutting steel scrap is fluxed and stove in the CO reignition be the function of secondary combustion, the geseous fuel usage quantity is 100Nm
3/ h-2000Nm
3/ h; Liquid fuel usage quantity 100kg/h-2000kg/h, the oxygen usage quantity of secondary combustion is 200Nm
3/ h-2000Nm
3/ h.
Description of drawings:
Fig. 1 comprises that primary oxygen jets passage 1, water inlet tap 2, faucet 3, water inlet pipe 4, rising pipe 5, oxygen spray orifice 6, fuel winding-up pipe 7, secondary oxygen inlet 8, fuel enter mouth 9
Embodiment:
Form by main oxygen injection system, secondary oxygen injection system, fuel winding-up, water-cooling system four parts on the present device.Main oxygen injection system is positioned at the central position of cluster fluidic oxygen gun; Main oxygen securing system is positioned at the skin of main oxygen injection system, is provided with the winding-up of combustion gas (oil) and secondary oxygen; Water-cooling system is positioned at the spray gun outermost layer, is provided with into water and water outlet at oxygen rifle one end.
The present invention has designed a kind of cluster fluidic oxygen gun, the exit diameter 25.98mm of oxygen rifle, throat diameter is 20mm, the length of oxygen rifle is 1000mm, and the oxygen rifle inserts the central authorities of electric arc furnace, and the external diameter of main oxygen tube is 45mm, the external diameter of auxiliary oxygen tube is 70mm, the external diameter of gas pipe is 57mm, and the external diameter of water inlet pipe is 89mm, and the external diameter of rising pipe is 108mm.The cluster fluidic spray gun is arranged on the furnace wall, and spray gun carries out oxygen blast in the position of the above 600mm of slag line; Gas on the technology after the burning of employing Sweet natural gas and secondary oxygen is as shielding gas, and total oxygen flow is 5000Nm
3/ h, the total pressure of jet pipe oxygen inlet is 1Mpa, fuel winding-up amount is 1000Nm
3/ h.
Test shows that total oxygen-consumption of oxygen rifle has reduced 20%, and the consumption of oil has increased by 5%, the efficient of carbon drop has improved 20%, and the content of carbon reduces by 30% in the foamy slag, and the quality of foamy slag is greatly improved, the FeO quantity of slag has reduced by 6%, and power consumption reduces by 5%, and output increases by 1.5%.
Claims (5)
1. oxygen blowing apparatus for smelting steel, this equipment is a kind of cluster fluidic oxygen gun, comprise main oxygen fluidic channel (1), water inlet tap (2), faucet (3), water inlet pipe (4), rising pipe (5), oxygen spray orifice (6), it is characterized in that main oxygen fluidic channel (1) skin is provided with main oxygen securing system, main oxygen securing system is entered mouth (9) and is formed by fuel winding-up pipe (7), secondary oxygen inlet (8), fuel; Main oxygen fluidic channel (1) is positioned at the central position of cluster fluidic oxygen gun; Fuel winding-up pipe (7) is near main oxygen fluidic channel (1) outside, and secondary oxygen inlet (8) is positioned at fuel winding-up pipe (7) outside, and water-cooling system is positioned at the spray gun outermost layer, and water inlet tap (2), faucet (3) are located at the end of oxygen rifle away from spout.
2. oxygen blowing apparatus for smelting steel as claimed in claim 1 is characterized in that the cluster fluidic spray gun is arranged on the furnace wall, and spray gun carries out oxygen blast in the position of the above 400-1000mm of slag line.
3. a steelmaking oxygen blowing technology that adopts oxygen blowing apparatus for smelting steel as claimed in claim 1 is characterized in that adopting on the technology cluster fluidic oxygen gun, and as shielding gas, total oxygen flow is 1000-10000Nm with the gas after geseous fuel and the burning of secondary oxygen
3/ h, the total pressure of jet pipe oxygen inlet is 0.30-1.5Mpa, fuel winding-up amount is 100Nm
3/ h-2000Nm
3/ h.
4. oxygen blast technology as claimed in claim 3 is characterized in that on the technology adopting gas after liquid fuel and the burning of secondary oxygen as shielding gas, and fuel winding-up amount is 100kg/h-2000kg/h.
5. the purposes of an oxygen blowing apparatus for smelting steel as claimed in claim 1, it is characterized in that this equipment has also under guaranteeing good decarburization effect prerequisite that fuel combustion cutting steel scrap is fluxed and stove in the function of CO reignition, the geseous fuel usage quantity is 100Nm
3/ h-2000Nm
3/ h; Liquid fuel usage quantity 100kg/h-2000kg/h, the oxygen usage quantity of secondary combustion is 200Nm
3/ h-2000Nm
3/ h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021004668A CN1225314C (en) | 2002-02-01 | 2002-02-01 | Oxygen blowing apparatus for smelting steel, technology and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021004668A CN1225314C (en) | 2002-02-01 | 2002-02-01 | Oxygen blowing apparatus for smelting steel, technology and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1379115A CN1379115A (en) | 2002-11-13 |
| CN1225314C true CN1225314C (en) | 2005-11-02 |
Family
ID=4739381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021004668A Expired - Fee Related CN1225314C (en) | 2002-02-01 | 2002-02-01 | Oxygen blowing apparatus for smelting steel, technology and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1225314C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288038A (en) * | 2010-06-17 | 2011-12-21 | 上海宝钢设备检修有限公司 | Oxygen blowing air port of smelting reduction iron-making furnace |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2381930T3 (en) * | 2008-06-26 | 2012-06-01 | Praxair Technology, Inc. | Combustion of CO and fuels in waste gases from steelworks |
| CN104442030B (en) | 2009-03-31 | 2017-04-12 | 兄弟工业株式会社 | Tape cassette |
| CN102191352A (en) * | 2010-03-12 | 2011-09-21 | 苏州宝联重工股份有限公司 | Coherent jet lance |
| CN101993968B (en) * | 2010-12-09 | 2012-07-18 | 中冶南方工程技术有限公司 | Converter molten steel temperature control method |
| CN102312043B (en) * | 2011-08-26 | 2013-05-08 | 攀钢集团成都钢钒有限公司 | Electric arc furnace steelmaking oxygen supply process, and electric arc furnace steelmaking method by using oxygen supply process |
| CN103335526B (en) * | 2013-07-18 | 2015-02-18 | 湖南华信有色金属有限公司 | Water gas spray gun for oxygen-enriched side blowing melting furnace molten pool |
| CN104263877B (en) * | 2014-10-14 | 2016-04-27 | 钢铁研究总院 | In process the converter of high phosphorus hot metal dust, air blowing composite spray gun and using method |
| CN104593541A (en) * | 2015-01-27 | 2015-05-06 | 中钢集团鞍山热能研究院有限公司 | Device for melting ladle or residual iron and residual slag in ladle and application method of device |
| CN106367558A (en) * | 2016-10-11 | 2017-02-01 | 马鞍山钢铁股份有限公司 | Electric arc furnace oxygen gun structure |
-
2002
- 2002-02-01 CN CNB021004668A patent/CN1225314C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288038A (en) * | 2010-06-17 | 2011-12-21 | 上海宝钢设备检修有限公司 | Oxygen blowing air port of smelting reduction iron-making furnace |
| CN102288038B (en) * | 2010-06-17 | 2013-06-19 | 上海宝钢设备检修有限公司 | Oxygen blowing air port of smelting reduction iron-making furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1379115A (en) | 2002-11-13 |
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Granted publication date: 20051102 Termination date: 20120201 |