CN109628689A - High hot metal ratio electric furnace method for supplying oxygen - Google Patents
High hot metal ratio electric furnace method for supplying oxygen Download PDFInfo
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- CN109628689A CN109628689A CN201910146319.8A CN201910146319A CN109628689A CN 109628689 A CN109628689 A CN 109628689A CN 201910146319 A CN201910146319 A CN 201910146319A CN 109628689 A CN109628689 A CN 109628689A
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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
Abstract
The invention discloses a kind of high hot metal ratio electric furnace method for supplying oxygen, and using coaxial double supersonic flows of oxygen coherent oxygen lances, which is made of multilayer coaxial sleeve: internal layer is circular hole supersonic nozzle component, generate 1.8-2.2 Mach of the first fast supersonic jet；Outer layer is water cold sleeve component, protects oxygen rifle from the damage of hot environment, guarantees that oxygen rifle is used for a long time under high temperature environment；It is annular distance supersonic nozzle component between inside and outside layer assembly, it generates 1-1.5 Mach of the second fast supersonic jet and generates the thin expanding combustion air-flow of high speed, further big envelope and centripetal compression supersonic jet, form boundling oxygen jet, increase the length of oxygen jet and the impact stirring action to molten steel face, improves solubility of the oxygen in molten steel.
Description
Technical field
The invention belongs to metallurgical technology field, in particular to a kind of high hot metal ratio electric furnace method for supplying oxygen.
Background technique
High hot metal ratio electric furnace smelting refers to the electric furnace smelting process that the molten iron that electric furnace is added reaches 50~90% or more, passes through
A large amount of oxygen are blown into molten bath using oxygen rifle, it, which can obtain 200KW electric power consumption per ton steel below even without heated by electrodes, is
A kind of advanced high-efficiency steel-smelting technique of modern electric stove, neck reaches within 32min/ furnace smelting cycle.In EAF Steelmaking Process, take off
Phosphorus and decarburization are the chemical reactions occurred in two different temperature regions.How economical and efficient the phosphorus in high phosphorus hot metal to be taken off
To extremely low, high value-added product is produced, is the problem of current high hot metal ratio electric furnace smelting.Dephosphorization is mainly made using lime
Slag, and enter molten steel with supersonic oxygen and generate iron oxide, lime can be made quickly to form foamed slag, improve dephosphorization rate.
But excessively molten iron temperature can be made quickly to increase with oxygen, block dephosphorization process.
Meanwhile efficient decarburization needs to be blown into a large amount of oxygen to molten steel high speed, strong stirring molten steel shortens high hot metal ratio electric furnace
Smelting cycle matches the conticaster of high pulling rate.
Although disclosing a kind of boundling carbon oxygen lance structure of ring combustion in the prior art, the burner function of electric furnace oxygen lance is enhanced
Can, but its smelting process for being only suitable only for full steel scrap or high scrap ratio electric furnace, it is unable to satisfy the smelting requirements of high hot metal ratio electric furnace.
A kind of converter oxygen gun is also disclosed in the prior art, during dephosphorization dusts oxygen rifle and decarburization double flow oxygen lance all has and be located at
The secondary oxygen circulation road of the heart and main oxygen circulation road positioned at secondary oxygen circulation road periphery.But this kind of oxygen rifle is to adapt to converter smelting to use
The multi-port structure of certain deflection angle is not suitable for electric furnace smelting operating condition.
It can be seen that high hot metal ratio electric furnace steel making oxygen demand uses different oxygen blast systems under different operating conditions.Therefore
It is necessary to develop a kind of efficient oxygen rifle of double fluid speed, the current country yet there are no that such to be suitble to high hot metal ratio electric furnace to use coaxial
The long fast oxygen rifle of jet stream double fluid of supersonic speed.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of high hot metal ratio electric furnace oxygen supply sides
Method, to realize the effective oxygen of high hot metal ratio electric furnace.
In order to achieve the above objects and other related objects, technical solution of the present invention is as follows:
A kind of high hot metal ratio electric furnace method for supplying oxygen, using coaxial double supersonic flows of oxygen coherent oxygen lances, coaxial double Supersonics
Fast oxygen stream coherent oxygen lance has cooling jacket, leads to for being passed through oxygen and generating the first oxygen of the first beam supersonic jet
Road, the second oxygen channel for being passed through oxygen and the second beam supersonic jet of generation and the combustion gas for spraying combustion gas are logical
Road, second oxygen channel are located at the first oxygen channel periphery, and blast tube is located at the second oxygen channel periphery, in which:
During electric furnace smelting, cooling water is injected in cooling jacket, and oxygen rifle is cooled down；
In the dephosphorization phase, it is passed through 0.8~1.2MPa high pressure oxygen in the second oxygen channel, forms 1-1.5 Mach of Supersonic
Fast boundling oxygen jet, flow control is in 500~1500Nm3/ h generates iron oxide in molten iron level；
In slag-formation period, 1.0~1.5MPa high pressure oxygen is passed through in the first oxygen channel, 1.8-2.2 Mach of generation surpasses
Velocity of sound jet stream, flow control is in 1500~3500Nm3/ h quickly forms foamed slag on molten iron surface；
In carbon period, 1.0~1.5MPa high pressure oxygen, 1500~3500N of flow control are passed through in the first oxygen channel
m3/ h, while 0.8~1.2MPa high pressure oxygen is passed through in the second oxygen channel, flow control is in 500~1500Nm3/ h, and
It is passed through 0.2~0.3MPa combustion gas in blast tube, forms supersonic speed boundling oxygen jet, stirs molten steel and quick decarburization；
Be not passed through in each channel in institute's having time of oxygen or combustion gas, be passed through always purge gass carry out protection and it is cold
But.
The present invention can form coaxial double supersonic flows of oxygen, and oxygen rifle flow can be adjusted flexibly under the conditions of supersonic jet,
The smelting phase of each different operating conditions of high scrap ratio electric furnace be can satisfy to the different demands with oxygen system, to improve electric furnace smelting
Efficiency, reduce consumption, shorten smelting cycle.Combustion gas spout generate the thin expanding combustion air-flow of high speed, further big envelope and to
The heart compresses supersonic jet, is allowed to form boundling oxygen jet, increases the length of oxygen jet and the impact to molten steel face
Stirring action improves solubility of the oxygen in molten steel.Boundling supersonic jet can be achieved under various flows, extend oxygen
Spray distance reduce hyperthermia radiation and slag liquid to spray gun so that oxygen rifle may be mounted at from the higher position of liquid steel level
Damage, extends the service life of oxygen rifle.
Optionally, coaxial double supersonic flows of oxygen coherent oxygen lances further include that the secondary oxygen being connected to the second oxygen channel leads to
The oxygen stream of second oxygen channel is split into housing gas by road, the pair oxygen channel, surrounds the second beam supersonic jet, and with
The combustion gas mixing burning that blast tube sprays, generates expanded gas flow, the second beam supersonic oxygen of further big envelope and centripetal compression
Jet stream is allowed to form cluster fluidic.
Optionally, the coaxial double supersonic flows of oxygen coherent oxygen lances include the central tube being sequentially coaxially arranged from the inside to the outside,
Annular distance supersonic nozzle and water cold sleeve, the central tube oral area are Lavalle spray orifice, which forms described first
Oxygen channel forms the second oxygen channel, and annular distance supersonic nozzle oral area between the annular distance supersonic nozzle and central tube
The supersonic jet channel for first shrinking further expansion is formed between interior profile surface and central tube external profile surface along jet direction, the annular distance is super
The blast tube is formed between sonic nozzle and water cold sleeve.
Optionally, the central tube includes the first sleeve being connected and Laval nozzle, the annular distance supersonic nozzle
Including the second casing and annular distance spray head being connected, the Laval nozzle is inserted into the annular distance spray head, the annular distance spray head
Interior exterior feature is equipped with oxygen notch, and external profile surface is equipped with clustering ring and fires slot, is provided with edge between oxygen notch and clustering ring combustion slot and penetrates
Flow the boundling epoxy aperture that epoxy spray head is run through in direction, pair oxygen channel described in the boundling epoxy keyhole formation.
Optionally, the oxygen notch, boundling epoxy aperture and clustering ring combustion slot are circumferentially uniformly distributed along epoxy spray head respectively.
Optionally, the water cold sleeve includes water-cooled inner tube, intermediate casing, water cooling outer tube and end socket, the water-cooled inner tube
It is welded respectively with end socket with water cooling outer tube, intermediate casing is separated into water and backwater channel.
Optionally, wide in the annular distance spray head is straight tube, and Laval nozzle gabarit cross section is first changed from small to big, then by becoming greatly
It is small.
Optionally, the Laval nozzle gabarit is straight tube, and wide cross section is first from large to small in the annular distance spray head, then by
It is small to become larger.
Optionally, Laval nozzle gabarit cross section is first changed from small to big, while wide cross section in exterior feature in annular distance spray head
From large to small；Again from large to small, while wide cross section is changed from small to big in annular distance spray head in Laval nozzle gabarit cross section.
The beneficial effects of the present invention are: the present invention can form coaxial double supersonic flows of oxygen, it can be in supersonic jet condition
Under oxygen rifle flow is adjusted flexibly, the smelting phase that can satisfy each different operating conditions of high scrap ratio electric furnace needs to the difference of oxygen system
It asks, to improve the efficiency of electric furnace smelting, reduces consumption, shorten smelting cycle.Combustion gas spout generates the thin expanding combustion of high speed
Air-flow, further big envelope and centripetal compression supersonic jet, formed boundling oxygen jet, increase oxygen jet length and
To the impact stirring action in molten steel face, solubility of the oxygen in molten steel is improved.Boundling supersonic speed can be achieved under various flows
Jet stream extends the spray distance of oxygen, so that oxygen rifle may be mounted at from the higher position of liquid steel level, reduces hyperthermia radiation
Damage with slag liquid to spray gun extends the service life of oxygen rifle.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of oxygen lance nozzle of the present invention；
Fig. 2 is the bottom view of spray head of the invention.
Piece mark explanation
11- Laval nozzle；12- first sleeve；21- annular distance spray head；The second casing of 22-；23- oxygen notch；24- boundling
Epoxy aperture；25- clustering ring fires slot；31- end socket；32- water-cooled inner tube；33- intermediate casing；34- water cooling outer tube；The first oxygen of A-
Gas channel；The second oxygen channel of B-；C- blast tube.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
It should be clear that the term of such as "upper", "lower", "left", "right", " centre " and " one " cited in this specification, also
Only being illustrated convenient for narration, rather than to limit the scope of the invention, relativeness is altered or modified, in nothing
Under essence change technology contents, when being also considered as the enforceable scope of the present invention.
As depicted in figs. 1 and 2, the present invention provides a kind of high hot metal ratio electric furnace method for supplying oxygen, using coaxial double supersonic speed oxygen
Coherent oxygen lance is flowed, coaxial double supersonic flows of oxygen coherent oxygen lances have for cooling cooling jacket, for being passed through oxygen simultaneously
It generates the first oxygen channel A of the first beam supersonic jet, penetrated for being passed through oxygen and generating the second beam supersonic oxygen
Second oxygen channel B of stream and the blast tube C, the second oxygen channel B for spraying combustion gas are located at the first oxygen channel A
Periphery, blast tube C are located at the second periphery oxygen channel B, in which:
During the entire process of electric furnace smelting, cooling water is injected in cooling jacket, and oxygen rifle is carried out to continue cooling；
In the dephosphorization phase of high hot metal ratio electric furnace smelting, it is passed through 0.8~1.2MPa high pressure oxygen in the second oxygen channel B,
1-1.5 Mach of supersonic speed boundling oxygen jet is formed, flow control is in 500~1500Nm3/ h is generated a large amount of in molten iron level
Iron oxide；
In the slag-formation period of high hot metal ratio electric furnace smelting, it is passed through 1.0~1.5MPa high pressure oxygen in the first oxygen channel A,
1.8-2.2 Mach of supersonic jet is generated, flow control is in 1500~3500Nm3/ h quickly forms foam on molten iron surface
Slag；
In the carbon period of high hot metal ratio electric furnace smelting, it is passed through 1.0~1.5MPa high pressure oxygen in the first oxygen channel A,
1500~3500Nm of flow control3/ h, while 0.8~1.2MPa high pressure oxygen, flow control are passed through in the second oxygen channel B
In 500~1500Nm3/ h, and 0.2~0.3MPa combustion gas is passed through in blast tube C, form the supersonic speed boundling of high flow capacity
Oxygen jet stirs molten steel and quick decarburization；
Be not passed through in each channel in institute's having time of oxygen or combustion gas, be passed through always purge gass carry out protection and it is cold
But.
In one embodiment, coaxial double supersonic flows of oxygen coherent oxygen lances further include being connected to the second oxygen channel B
Secondary oxygen channel, secondary oxygen channel is between the second beam supersonic jet and blast tube C, and secondary oxygen channel is by the second oxygen channel B
Oxygen stream be split into housing gas, surround the second beam supersonic jet, the combustion gas mixing that the housing gas and blast tube C spray
Burning, generates thin expanded gas flow, the second beam supersonic jet of further big envelope and centripetal compression is allowed to form boundling
Jet stream.
Specifically, coaxial double supersonic flows of oxygen coherent oxygen lances, are made of, including from the inside to the outside spray head and multilayer coaxial sleeve
Central tube, annular distance supersonic nozzle and the water cold sleeve being sequentially coaxially arranged, wherein it is logical that first oxygen is formed in central tube
Road A, central tube oral area is Lavalle spray orifice, for generating the first beam supersonic jet；The annular distance supersonic nozzle with
The second oxygen channel B is formed between central tube, in the annular distance supersonic nozzle oral area profile surface and central tube oral area external profile surface it
Between along jet direction formed first shrink further expansion supersonic jet channel, for generate the second beam supersonic jet；Institute
It states and forms the blast tube C between annular distance supersonic nozzle and water cold sleeve.
Wherein, central tube includes first sleeve 12 and the Laval nozzle 11 with the welding of first sleeve 12, annular distance supersonic speed
Jet pipe includes the second casing 22 and the annular distance spray head 21 that connect with the second casing 22, and Laval nozzle 11 is inserted into the annular distance spray
In first 21, oxygen notch 23 is equipped in annular distance spray head 21 at wide time mouth, 21 outer wall of annular distance spray head edge is parallel to axis direction and sets
There is clustering ring to fire slot 25, is provided with along jet direction between oxygen notch 23 and clustering ring combustion slot 25 through epoxy spray head
Boundling epoxy aperture 24, boundling epoxy aperture 24 form the secondary oxygen channel.
Wherein, oxygen notch 23, boundling epoxy aperture 24 and clustering ring combustion slot 25 are circumferentially uniformly distributed along epoxy spray head respectively.
The water cold sleeve coaxial arrangement is in annular distance supersonic nozzle periphery, including water-cooled inner tube 32, intermediate casing 33, water
Cold outer tube 34 and hollow end socket 31, the water-cooled inner tube 32 and water cooling outer tube 34 are welded with end socket 31 respectively, intermediate casing 33
Intake tunnel and backwater channel are separated, forms intake tunnel, intermediate casing 33 and water between intermediate casing 33 and water-cooled inner tube 32
Backwater channel is formed between cold outer tube 34, forms closed chilled(cooling) water return (CWR), the annular distance spray head 21 is inserted into the end socket 31.
Cooling water persistently cools down, and guarantees that oxygen rifle is used for a long time under high temperature environment.
The first beam supersonic jet is formed through Lavalle spray orifice by being passed through oxygen in first sleeve 12；By first sleeve
12 and second oxygen that is passed through between casing 22, it is sprayed respectively through oxygen notch 23 and clustering ring oxygen aperture 24, forms the second beam
Supersonic jet and housing gas；Combustion gas through being passed through between the second casing 22 and water-cooled inner tube 32, fires slot through clustering ring
25 spray, and burn with housing gas.Wherein each oxygen notch 23 is equal along jet direction section, each 24 edge of boundling epoxy aperture
Hole length direction section is equal, does not change.
Wherein, between wide in annular distance spray head 21 and 11 gabarit of Laval nozzle the area of section of airflow channel changing rule
Meet the structural condition of supersonic jet, to generate supersonic jet.Following form specifically can be used:
A, profile surface is straight tube in annular distance spray head 21, and 11 gabarit cross section (or outer diameter) of Laval nozzle is first changed from small to big, then
From large to small.
B, 11 gabarit of Laval nozzle is straight tube, and wide cross section (or internal diameter) is first by becoming greatly in the annular distance spray head 21
It is small, then change from small to big, as shown in Figure 1.
C, the 11 gabarit cross section (or outer diameter) of Laval nozzle is first changed from small to big along jet direction, then from large to small；
Wide cross section (or internal diameter) is first from large to small along jet direction in corresponding annular distance spray head 21, then changes from small to big.
The exit of the present invention, the first oxygen channel A are Lavalle spray orifice, and the oxygen being passed through is formed by Lavalle spray orifice
First beam supersonic jet；The second oxygen channel B is formed between central tube and annular distance supersonic nozzle, is same as being passed through oxygen
Gas；And the fluidic channel first shunk and expanded afterwards is formed along jet direction between the annular distance supersonic nozzle and central tube, it is used for
The second beam supersonic jet is formed, the second beam supersonic jet is located at the first beam supersonic jet periphery, institute
Composition blast tube C between annular distance supersonic nozzle and water cold sleeve is stated, clustering ring combustion is provided on the annular distance supersonic nozzle
Slot is allowed to shape for generating the thin high-speed flow of expanding combustion, big envelope and the second beam supersonic jet of centripetal compression
At cluster fluidic.To increase the length of oxygen jet and the impact stirring action to molten steel face, oxygen is improved in molten steel
Solubility.
Due to forming coaxial double supersonic flows of oxygen, oxygen rifle flow can be adjusted flexibly under the conditions of supersonic jet, it can be with
Meet the smelting phase of each different operating conditions of high scrap ratio electric furnace to the different demands with oxygen system, to improve the effect of electric furnace smelting
Rate reduces consumption, shortens smelting cycle.Boundling supersonic jet can be achieved under various flows, extend the jet length of oxygen
From so that oxygen rifle may be mounted at from the higher position of liquid steel level, the damage of reduction hyperthermia radiation and slag liquid to spray gun extends
The service life of oxygen rifle.
The gas supply of coaxial double supersonic flows of oxygen oxygen rifles is required by steam supply valve station according to the smelting process of electric furnace, by air supply pipe
The high-pressure air source of net is modulated into smelting process required pressure, and every oxygen all the way of control steam supply valve station injection oxygen rifle, is blown at combustion gas
Gas flow, pressure and the moment of scavenging.
Oxygen rifle flow can be adjusted flexibly in the present invention, can satisfy smelting phases of each different operating conditions of high scrap ratio electric furnace to
The different demands of oxygen system reduce consumption to improve the efficiency of electric furnace smelting, shorten smelting cycle.
Also, boundling supersonic jet can be achieved under various flows, the spray distance of oxygen is extended, so that oxygen rifle
It may be mounted at from the higher position of liquid steel level, reduce the damage of hyperthermia radiation and slag liquid to spray gun, extend the use of oxygen rifle
Service life.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (9)
1. a kind of high hot metal ratio electric furnace method for supplying oxygen, it is characterised in that: described same using coaxial double supersonic flows of oxygen coherent oxygen lances
The double supersonic flows of oxygen coherent oxygen lances of axis have cooling jacket, for being passed through oxygen and generating the of the first beam supersonic jet
One oxygen channel, for be passed through oxygen and generate the second beam supersonic jet the second oxygen channel and for spraying combustion gas
Blast tube, second oxygen channel is located at the first oxygen channel periphery, and it is peripheral that blast tube is located at the second oxygen channel,
Wherein:
During electric furnace smelting, cooling water is injected in cooling jacket, and oxygen rifle is cooled down；
In the dephosphorization phase, it is passed through 0.8~1.2MPa high pressure oxygen in the second oxygen channel, forms 1-1.5 Mach of supersonic speed collection
Beam oxygen jet, flow control is in 500~1500Nm3/ h generates iron oxide in molten iron level；
In slag-formation period, it is passed through 1.0~1.5MPa high pressure oxygen in the first oxygen channel, generates 1.8-2.2 Mach of supersonic speed
Jet stream, flow control is in 1500~3500Nm3/ h quickly forms foamed slag on molten iron surface；
In carbon period, 1.0~1.5MPa high pressure oxygen is passed through in the first oxygen channel, flow control is in 1500~3500Nm3/
H, while 0.8~1.2MPa high pressure oxygen is passed through in the second oxygen channel, flow control is in 500~1500Nm3/ h, and
It is passed through 0.2~0.3MPa combustion gas in blast tube, forms supersonic speed boundling oxygen jet, stirs molten steel and quick decarburization；
It is not passed through in each channel in institute's having time of oxygen or combustion gas, is passed through purge gass always and is protected and cooled down.
2. high hot metal ratio electric furnace method for supplying oxygen according to claim 1, it is characterised in that: coaxial double supersonic flows of oxygen
Coherent oxygen lance further includes the secondary oxygen channel being connected to the second oxygen channel, and the pair oxygen channel is by the oxygen flow point of the second oxygen channel
Housing gas is flowed into, the second beam supersonic jet is surrounded, and the combustion gas mixing sprayed with blast tube is burnt, generates expansion gas
Stream, the second beam supersonic jet of further big envelope and centripetal compression are allowed to form cluster fluidic.
3. high hot metal ratio electric furnace method for supplying oxygen according to claim 1, it is characterised in that: coaxial double supersonic flows of oxygen
Coherent oxygen lance includes the central tube being sequentially coaxially arranged from the inside to the outside, annular distance supersonic nozzle and water cold sleeve, the central tube
Oral area is Lavalle spray orifice, forms first oxygen channel in the central tube, the annular distance supersonic nozzle and central tube it
Between form the second oxygen channel, along jet direction shape between profile surface and central tube external profile surface in the annular distance supersonic nozzle oral area
At the supersonic jet channel for first shrinking further expansion, it is logical that the combustion gas is formed between the annular distance supersonic nozzle and water cold sleeve
Road.
4. high hot metal ratio electric furnace method for supplying oxygen according to claim 3, it is characterised in that: the central tube includes being connected
First sleeve and Laval nozzle, the annular distance supersonic nozzle includes the second casing and annular distance spray head being connected, described
Laval nozzle is inserted into the annular distance spray head, and wide in the annular distance spray head to be equipped with oxygen notch, external profile surface is fired equipped with clustering ring
Slot is provided with the boundling epoxy aperture for running through epoxy spray head along jet direction, institute between oxygen notch and clustering ring combustion slot
State pair oxygen channel described in boundling epoxy keyhole formation.
5. high hot metal ratio electric furnace method for supplying oxygen according to claim 4, it is characterised in that: the oxygen notch, clustering ring
Oxygen aperture and clustering ring combustion slot are circumferentially uniformly distributed along epoxy spray head respectively.
6. high hot metal ratio electric furnace method for supplying oxygen according to claim 1, it is characterised in that: the water cold sleeve includes water cooling
Inner tube, intermediate casing, water cooling outer tube and end socket, the water-cooled inner tube and water cooling outer tube respectively with end socket weld, intermediate casing every
Drive water and backwater channel into.
7. high hot metal ratio electric furnace method for supplying oxygen according to claim 4, it is characterised in that: exterior feature is straight in the annular distance spray head
Pipe, Laval nozzle gabarit cross section are first changed from small to big, then from large to small.
8. high hot metal ratio electric furnace method for supplying oxygen according to claim 4, it is characterised in that: the Laval nozzle gabarit is
Straight tube, wide cross section first from large to small, then is changed from small to big in the annular distance spray head.
9. high hot metal ratio electric furnace method for supplying oxygen according to claim 4, it is characterised in that: the Laval nozzle gabarit is horizontal
Section first changes from small to big, while wide cross section is from large to small in exterior feature in annular distance spray head；Laval nozzle gabarit cross section is again by big
Become smaller, while wide cross section is changed from small to big in annular distance spray head.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006697A (en) * | 2019-05-14 | 2019-07-12 | 中冶赛迪技术研究中心有限公司 | The sampling of robot thermometric is with from cooling gun |
| WO2020173088A1 (en) * | 2019-02-27 | 2020-09-03 | 中冶赛迪工程技术股份有限公司 | Coaxial dual supersonic speed oxygen flow coherent oxygen lance |
| CN111635972A (en) * | 2020-04-27 | 2020-09-08 | 内蒙古赛思普科技有限公司 | Oxygen-spraying melting reduction iron-making process |
| WO2023234498A1 (en) * | 2022-05-31 | 2023-12-07 | 현대제철 주식회사 | Injection system of electric furnace and electric furnace including same |
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| US5714113A (en) * | 1994-08-29 | 1998-02-03 | American Combustion, Inc. | Apparatus for electric steelmaking |
| CN1198525A (en) * | 1997-03-18 | 1998-11-11 | 普拉塞尔技术有限公司 | Lance/burner for molten metal furnace |
| CN101684512A (en) * | 2008-09-26 | 2010-03-31 | 辽宁科技大学 | Coherent jet oxygen blowing method for electric furnace steel making |
| CN104775008A (en) * | 2015-05-08 | 2015-07-15 | 中冶赛迪工程技术股份有限公司 | Annular tooth seam supersonic jetting nozzle |
| CN105838845A (en) * | 2016-06-06 | 2016-08-10 | 中冶赛迪工程技术股份有限公司 | Supersonic circulating combustion coherent arbon-oxygen lance of electric arc furnace and spray head structure |
| CN105950824A (en) * | 2016-06-06 | 2016-09-21 | 中冶赛迪工程技术股份有限公司 | Electric arc furnace steelmaking process with oxygen, fuel and powder common injection |
| CN106544467A (en) * | 2016-10-31 | 2017-03-29 | 山东钢铁股份有限公司 | A kind of high alloy Low-phosphorus Steel method in high molten iron proportion electric furnace smelting |
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| WO2020173088A1 (en) * | 2019-02-27 | 2020-09-03 | 中冶赛迪工程技术股份有限公司 | Coaxial dual supersonic speed oxygen flow coherent oxygen lance |
| CN110006697A (en) * | 2019-05-14 | 2019-07-12 | 中冶赛迪技术研究中心有限公司 | The sampling of robot thermometric is with from cooling gun |
| CN111635972A (en) * | 2020-04-27 | 2020-09-08 | 内蒙古赛思普科技有限公司 | Oxygen-spraying melting reduction iron-making process |
| WO2023234498A1 (en) * | 2022-05-31 | 2023-12-07 | 현대제철 주식회사 | Injection system of electric furnace and electric furnace including same |
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