CN105316452B - A kind of high rifle position process for vacuum refining based on boundling top gun - Google Patents
A kind of high rifle position process for vacuum refining based on boundling top gun Download PDFInfo
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- CN105316452B CN105316452B CN201510835394.7A CN201510835394A CN105316452B CN 105316452 B CN105316452 B CN 105316452B CN 201510835394 A CN201510835394 A CN 201510835394A CN 105316452 B CN105316452 B CN 105316452B
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Abstract
The present invention provides a kind of high rifle position process for vacuum refining based on boundling top gun, and boundling top gun has the pulvis passage positioned at center, the main oxygen passage positioned at pulvis channels peripheral and pays oxygen passage positioned at main oxygen channels peripheral；In RH vacuum refinings; oxygen is entered by main oxygen passage and pair oxygen passage forms main oxygen stream and a pair oxygen stream respectively; pulvis with main oxygen stream injects molten steel under protection jointly in sweeping along for main oxygen stream; main oxygen stream impacts molten steel and generates carbon monoxide with the carbon reaction in molten steel; second-time burning heating, vacuum groove occurs for the carbon monoxide and pay oxygen stream of the clustering ring around wake for overflowing molten steel, reduces temperature drop.The present invention's pays oxygen stream in central supersonic jet profile cyclization around with stream, make that central supersonic jet extends and decay is smaller, supersonic jet is longer, improves oxygen jet to the penetration depth and stirring intensity in molten bath, rifle position, which improves, reduces molten steel splash and pipette tips dry slag, and service life extends.
Description
Technical field
The present invention relates to field of steel-making secondary smelting technology in metallurgy industry, more particularly to a kind of height based on boundling top gun
Rifle position process for vacuum refining.
Background technology
RH vacuum refinings are a kind of Ferrous Metallurgy technologies that last century the fifties grow up, in addition to vacuum outgas,
Can also oxygen decarburization, powder injection desulphurization so that Ultra-low carbon clean steel is smelted on a large scale.And originally the device of oxygen decarburization is set
In vacuum tank bottom, it was arranged on later in the middle part of vacuum tank, and was finally arranged at the top of vacuum tank, turns into water cooling multifunctional top-gun.It is existing
Have in technology, either RH-KTB top guns, RH-MFB top guns, RH-MESID top guns, RH-PB top guns or Chinese Patent Application No.
200420027046.4、200610076151.0、200820174977.5、200820174973.7、201110000083.0、
201210346652.1st, the top gun or shower nozzle involved by 201310431081.6, using circular hole convergent-divergent channel structure, i.e. Bearing score
You are managed typically in center, and blast tube is distributed on the outside of convergent-divergent channel, or 3~6 Lavalles oxygen blast hole surrounds center
Gas Pipe, this class formation limit the range of supersonic jet, i.e., need top gun dropping to molten steel face in the oxygen decarburization phase
Upper 2.5~3.5m position, below 1m even 0.1m or so are dropped in the powder injection desulphurization phase and implement to dust, also, oxygen blast is with dusting
It typically can not simultaneously carry out, undoubtedly extend the process cycle of vacuum refining, obstruction realizes high rifle position refining, reduces molten steel splash
With the process requirements of pipette tips dry slag.Existing RH vacuum outgas and oxygen decarburization, rifle position is not high enough can not also avoid pipette tips dry slag,
Supersonic flows of oxygen diverging can not form very much effectively impact to molten steel surface and penetrate molten steel face etc. until injecting soon, and particularly dusting needs
To enter vacuum system corrosion pipeline closer to molten steel face and pulvis so that technology of dusting is difficult to promote in RH.
Chinese Patent Application No. 2015102313132,2014103868764,2014103876370,2014103868800
Etc. the circumferential weld involved by patent of invention and ring slot top gun structure so that oxygen blast and the technical process dusted can be carried out simultaneously,
And do not have to reduce rifle position again during powder injection desulphurization.Even if supersonic airstream caused by this new top gun structure can wrap up powder
Agent and combustion gas, but it is the same still with the supersonic jet of other spray guns, it is blown apart from relatively short and scattered, the diffusion of jet
Make it that oxygen jet is small to the impulsive force in molten bath with decay, hinder molten steel flow on the contrary in the shallow hole that molten steel surface is formed, influence
Mixing time.
For the utilization for increasing the reaction interface of pulvis and molten steel in RH refining process, shortening injecting time, improving pulvis
Rate, reduce RH equipment in refractory material consume, to greatest extent remove molten steel in be mingled be vacuum refining process must
Ask.But existing RH vacuum refining top guns structure limits this process requirements, the hair of more efficient RH refinery practices is constrained
Exhibition, it is therefore necessary to study it is a kind of support oxygen blast, dust, the vacuum refining of the refinery processes such as combustion heating progress simultaneously it is new
Technique and new spray gun spray nozzle structure.
The content of the invention
The deficiencies in the prior art in view of the above, it is an object of the invention to provide one kind to be based on the high rifle position of boundling top gun
The method of vacuum refining, realize supersonic jet polymerization and oxygen blast, dust, the refinery processes such as combustion heating it is efficiently same
Step is carried out.
In order to achieve the above objects and other related objects, technical solution of the present invention is as follows：
There is the pulvis positioned at center to lead to for a kind of high rifle position process for vacuum refining based on boundling top gun, the boundling top gun
Road, the main oxygen passage positioned at pulvis channels peripheral and pair oxygen passage positioned at main oxygen channels peripheral；In RH vacuum refinings, pass through
Boundling top gun is blown into oxygen and pulvis into vacuum tank, oxygen by main oxygen passage and pay oxygen passage enter formed respectively main oxygen stream and
Oxygen stream is paid, described pair of oxygen stream forms one layer in main oxygen stream periphery around with stream, main oxygen stream and pulvis is formed cluster fluidic, powder
Agent injects molten steel under protection jointly in sweeping along for main oxygen stream with main oxygen stream, and main oxygen stream impact molten steel simultaneously reacts with the carbon in molten steel gives birth to
Into carbon monoxide, the carbon monoxide and pay oxygen stream of the clustering ring around wake for overflowing molten steel occur second-time burning heating, vacuum groove, subtracted
Small temperature drop.
Pulvis can be wrapped in oxygen stream the molten steel face that reaches by above-mentioned process, and oxygen blast is identical with the rifle position dusted；Spray
It need not prevent pulvis from being taken away by vacuum plant closer to molten steel face during powder, and enter vacuum system corrosion pipeline, improve pulvis
Utilization rate.And boundling injection technology is used, paying the adjoint stream of oxygen passage enables central supersonic oxygen stream to be worn as rod
Saturating molten steel face, is dissolved in molten steel, makes that central supersonic jet extends and decay is smaller, and supersonic jet is longer.
As preferred：In RH vacuum refinings, supersonic speed oxygen blast, dust and second-time burning heating process while carry out, collect
Bunchy top rifle pipette tips are located at more than 3m on molten steel face, under normal circumstances up to 3.5m~5m, avoid molten steel excessive spatter area, maximum limit
Reduce pipette tips dry slag in degree ground.
As preferred：In the RH vacuum refinings gap phase, combustion gas and oxygen, combustion gas are blown into vacuum tank by boundling top gun
It is blown into from pulvis passage, main oxygen stream and the combustion gas for paying oxygen stream combustion-supporting center jointly, combustion heating vacuum tank, maintains its internal temperature
More than 1350 DEG C；After more renewing vacuum tank, combustion gas and oxygen are passed through by boundling top gun, vacuum tank is heated to 1350
More than DEG C.
Effect being polymerize due to flame, extending, make it that pipette tips heated perimeter is longer under identical heating power, heat profit
Improved with rate.
As preferred：It is decarburizer to be blown into pulvis, to include CaCO3, the composition such as iron ore powder passivation particle；Decarburizer
Injecting velocity be 10~100kg/min；0.1~3mm of powder granularity；Carrier gas flux is 100~300Nm3/h；Oxygen flow is
1500~2500Nm3/h；It is blown 3~8min of the time；[C] up to below 5ppm, T [O] is up to below 10ppm.
As preferred：It is desulfurizing agent to be blown into pulvis, to include CaO, CaF2、SiO2、MgO、Al2O3Deng the passivation of composition
Grain；The injecting velocity of desulfurizing agent is 30~300kg/min；0.1~3mm of powder granularity；Carrier gas flux is 100~300Nm3/h；
Oxygen flow is 1500~2500Nm3/h；It is blown 3~8min of the time；[S] is up to below 5ppm.
As preferred：It is Dephosphorising agent to be blown into pulvis, to include the passivation particle of the compositions such as CaO；The injecting velocity of Dephosphorising agent
For 30~300kg/min；0.1~3mm of powder granularity；Carrier gas flux is 100~300Nm3/h；Oxygen flow be 1500~
2500Nm3/h；It is blown 3~8min of the time；[P] is up to below 20ppm.
As preferred：It is natural gas or coal gas, liquefied petroleum gas etc. to be blown into combustion gas, and combustion power is 1500~2500kW；
As preferred：The boundling top gun includes shower nozzle core pipe and shower nozzle outer tube, and the sprinkler core tube hub forms pulvis
Passage, the shower nozzle outer tube offer centre bore and the throttle orifice around center pore size distribution, and the throttle orifice forms described pair of oxygen
Passage, the shower nozzle core pipe is inserted in centre bore, and is positioned between shower nozzle outer tube by location structure, outside the shower nozzle core pipe
The main oxygen passage is formed in profile surface and shower nozzle outer tube between profile surface, the main oxygen passage both ends are tapered annular gas passage,
Middle part is concrete dynamic modulus annular groove shape gas passage.
Using said structure, concrete dynamic modulus annular groove shape gas passage and tapered annular gas passage can make oxygen when passing through
Obtain supersonic speed to accelerate, and flowed by the oxygen of shower nozzle outer tube throttle orifice outflow in the outer layer ring of the main oxygen of supersonic speed around adjoint, in making
Heart supersonic jet extends and decay is smaller, and supersonic jet is longer, improves penetration depth and stirring of the oxygen jet to molten bath
Intensity, simultaneously because effluxvelocity decay delays, the blowing rifle position of oxygen rifle can be improved, it is deep without influenceing impact of the jet to molten steel
Degree, extend the service life of oxygen gun sprayer.Oxygen flows out the outer layer ring to be formed from throttle orifice and can also taken off around with stream with molten steel
CO burning caused by carbon generates carbon dioxide, the resistance to material of liberated heat heating, vacuum groove, reduces reduction of speed under molten steel temperature
Degree.The combusting carbon monoxide heating, vacuum groove i.e. in smelting process, gap injection combustion gas and oxygen combustion heating vacuum tank are smelted,
Reach the purpose for eliminating residual steel.
As preferred：Profile surface is rotated around central axis by three sections of continuous buses and formed in the shower nozzle outer tube centre bore, the
One section of bus forms the reducing conical bore shunk in cross section, second segment bus and centerline axis parallel with central axis into positive angle
Isometrical cylindrical hole is formed, the 3rd section of bus forms the reducing conical bore of cross section expansion, positioning knot with central axis into negative angle
Structure is located between cylindrical hole and the shower nozzle core pipe of shower nozzle outer tube centre bore so that the second segment and sprinkler core of shower nozzle outer tube centre bore
Concrete dynamic modulus annular groove shape gas passage, the reducing conical bore of shower nozzle outer tube and the shower nozzle core pipe gabarit shape are formed between pipe external profile surface
Into the tapered annular gas passage of Varied section product, contractile ring cone section, multigap annular groove are formed continuously respectively from oxygen inlet to outlet
Section, expanded ring cone section.
As preferred：The location structure is positioning rib ridge, and the positioning rib ridge is arranged on shower nozzle outer tube or sprinkler core
Guan Shang.
As preferred：The cylindrical hole inner wall even distribution of the shower nozzle outer tube centre bore has the groove of 3 and the above, and adjacent two is recessed
The positioning rib ridge is formed between groove.
As preferred：On shower nozzle core pipe external profile surface corresponding with the cylindrical hole of shower nozzle outer tube centre bore it is circumferentially distributed have it is more
Individual cancave cambered surface, the positioning rib ridge is formed between adjacent two cancave cambered surface.
As preferred：Mounting hole is further opened with the shower nozzle outer tube, the mounting hole is sealedly provided with intermediate sleeve
Pipe.The auxiliary devices such as camera, flame detecting device, gas ignition device can be installed in intermediate casing.
As preferred：The mounting hole is stepped hole, and the mounting hole site is between centre bore and throttle orifice, or the section
Discharge orifice is between centre bore and mounting hole, or mounting hole is located at same circumference with throttle orifice, and the intermediate casing is multiple, is taken the photograph
As in a corresponding intermediate casing installed therein such as head, igniter and flame monitoring sensor.
As preferred：Also include with shower nozzle outer coaxial tube set water cooling outer tube, marine riser, water-cooled inner tube, gas inner tube,
The water cooling outer tube and water-cooled inner tube and shower nozzle outer tube welded seal；The gas inner tube is with the grafting of shower nozzle core pipe and close by elasticity
Seal ring seals.
As preferred：The gross area at the concrete dynamic modulus annular groove shape gas passage section minimum aperture is equal to design gas stream
The lower velocity of sound air-flow throat area of amount, tapered annular gas passage is in total circular space gross area of conical bore exit section etc.
In design under gas flow design Mach number corresponding to supersonic airstream discharge area.
As preferred：Shower nozzle core pipe external profile surface corresponding with the reducing circular cone hole section that shower nozzle outer tube centre bore shrinks is
The face of cylinder.
As preferred：Shower nozzle core pipe external profile surface corresponding with the reducing circular cone hole section that shower nozzle outer tube centre bore shrinks is
Circular conical surface.
As preferred：Shower nozzle core pipe external profile surface corresponding with the reducing circular cone hole section that shower nozzle outer tube centre bore expands is
Circular conical surface.
As preferred：Shower nozzle core pipe external profile surface corresponding with the reducing circular cone hole section that shower nozzle outer tube centre bore expands is
The face of cylinder.
As described above, the beneficial effects of the invention are as follows：
1st, the supersonic jet of existing oxygen rifle decays comparatively fast in actual use, exist injection apart from it is short, impact strength is small
The shortcomings of.The cluster fluidic injection technology of boundling top gun, preferably solve the defects of common supersonic speed oxygen rifle is present, it is and simple
Supersonic jet can produce compared to having the advantages that jet length is long, impulsive force is big, oxygen utilization rate is high and life-span of oxygen lance is long
Growth distance keeps initial outlet diameter, speed, the polymerization jet of momentum of impinging jet, the injectability of cluster fluidic during same distance
It is far longer than traditional supersonic gas jet, slag-metal reaction, non-uniform components and temperature can be promoted, splash is reduced, improve oxygen profit
With rate, improve recovery rate of iron.Simultaneously because the enhancing of penetration capacity, rifle position can properly increase, shower nozzle steel bonding is reduced, reduces oxygen rifle
Shower nozzle consumes.
2nd, it is cooling water intake tunnel between water-cooled inner tube and marine riser, water cooling in the boundling top gun structure of the present invention
It is oxygen channel between cooling water exhalant canal, water-cooled inner tube and gas inner tube that outer tube and marine riser, which are, in gas inner tube is combustion
Gas passage, pulvis can also be passed through as needed.Special interstitial channels between shower nozzle core pipe and shower nozzle outer tube distinguish continuous shape
Into contractile ring cone section, multigap annular groove section, expanded ring cone section, can make oxygen by when obtain supersonic speed and accelerate, and by shower nozzle
The oxygen of outer tube throttle orifice outflow flows in the outer layer ring of the main oxygen of supersonic speed around adjoint, central supersonic jet is extended and is decayed more
Small, supersonic jet is longer, improves penetration depth and stirring intensity of the oxygen jet to molten bath, simultaneously because effluxvelocity decays
Delay, the blowing rifle position of oxygen rifle can be improved, without influenceing impact depth of the jet to molten steel, extend oxygen gun sprayer uses the longevity
Life.Oxygen flows out the outer layer ring to be formed from throttling pore and can also generated around with stream with CO burning caused by molten steel decarburization
Carbon dioxide, the resistance to material of liberated heat heating, vacuum groove, reduce molten steel temperature decrease speed.Shooting can be installed in intermediate casing
The auxiliary devices such as head, flame detecting device, gas ignition device.
Brief description of the drawings
Fig. 1 is annular groove cluster fluidic nozzle structure schematic diagram in the embodiment of the present invention 1；
Fig. 2 is annular groove cluster fluidic head of the nozzle schematic diagram in the embodiment of the present invention 1；
Fig. 3 is the structural representation of shower nozzle outer tube in the embodiment of the present invention 1；
Fig. 4 is another distribution schematic diagram of throttle orifice in the embodiment of the present invention 1；
Fig. 5 is annular groove cluster fluidic nozzle structure schematic diagram in the embodiment of the present invention 2；
Fig. 6 is annular groove cluster fluidic head of the nozzle schematic diagram in the embodiment of the present invention 2；
Fig. 7 is the structural representation of shower nozzle core pipe in the embodiment of the present invention 2.
Piece mark explanation
1 shower nozzle core pipe
2 shower nozzle outer tubes
3 intermediate casings
4 water cooling outer tubes
5 marine risers
6 water-cooled inner tubes
7 gas inner tubes
8 concrete dynamic modulus annular groove shape gas passages
9 positioning rib ridges
2a centre bores
2b throttle orifices
2c stepped holes
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 understands other advantages and effect of the present invention easily.
Embodiment 1
A kind of high rifle position process for vacuum refining based on boundling top gun, using steel ladle, vacuum chamber, boundling top gun and
The technological equipment of vacuum extractor composition, the dip pipe of vacuum chamber is inserted in the molten steel of steel ladle, top gun is by sealing passage
Vacuum chamber is inserted, vacuum extractor makes the pressure on molten steel surface in vacuum chamber be in low-pressure state, is passed through and carries in rising dip pipe
Rising gas makes molten steel be circulated between vacuum chamber and steel ladle, and the media such as oxygen, pulvis, combustion gas are passed through in top gun.
Wherein boundling top gun has the pulvis passage positioned at center, the main oxygen passage positioned at pulvis channels peripheral and positioned at master
Oxygen channels peripheral pays oxygen passage；In RH vacuum refinings, oxygen and pulvis, Supersonic are blown into vacuum tank by boundling top gun
Fast oxygen blast, dust, second-time burning heating etc. while is carried out technical process, boundling top gun pipette tips are located at 3.5~5m on molten steel face, keep away
Open molten steel excessive spatter area.Wherein oxygen is entered by main oxygen passage and pair oxygen passage forms main oxygen stream and pays an oxygen stream respectively, described
Pay oxygen stream and one layer is formed in main oxygen stream periphery around with stream, main oxygen stream and pulvis is formed cluster fluidic, pulvis is in main oxygen stream
Sweep along protection lower and main oxygen stream injects molten steel jointly, main oxygen stream impact molten steel simultaneously with the oxidation of carbon reaction generation one in molten steel
Carbon, the carbon monoxide and pay oxygen stream of the clustering ring around wake for overflowing molten steel occur second-time burning heating, vacuum groove, reduce molten steel temperature
Drop.
Steel grade for only needing degassing and natural deoxidation decarburization, without falling boundling top gun, boundling top gun position when vacuumizing
In standby position in groove.
Steel grade for needing to force decarburization, fall during refining treatment boundling top gun to molten steel face 3.5m~5m, oxygen
Flow is 1500~2500Nm3/h；It is blown 3~8min of the time；[C] is up to below 20ppm.
For the steel grade of Ultra-low carbon, it is decarburizer to be blown into pulvis, to include CaCO3, the composition such as iron ore powder passivation
Grain；The injecting velocity of decarburizer is 10~100kg/min；0.1~3mm of powder granularity；Carrier gas flux is 100~300Nm3/h；
Oxygen flow is 1500~2500Nm3/h；It is blown 3~8min of the time；[C] up to below 5ppm, T [O] is up to below 10ppm.
Steel grade for needing desulfurization, it is desulfurizing agent to be blown into pulvis, to include CaO, CaF2、SiO2、MgO、Al2O3Deng into
The passivation particle divided；The injecting velocity of desulfurizing agent is 30~300kg/min；0.1~3mm of powder granularity；Carrier gas flux be 100~
300Nm3/h；Oxygen flow is 1500~2500Nm3/h；It is blown 3~8min of the time；[S] is up to below 5ppm.
Steel grade for needing dephosphorization, it is Dephosphorising agent to be blown into pulvis, to include the passivation particle of the compositions such as CaO；Dephosphorising agent
Injecting velocity be 30~300kg/min；0.1~3mm of powder granularity；Carrier gas flux is 100~300Nm3/h；Oxygen flow is
1500~2500Nm3/h；It is blown 3~8min of the time；[P] is up to below 20ppm.
In the RH vacuum refinings gap phase, combustion gas and oxygen are blown into vacuum tank by top gun, combustion gas is blown from pulvis passage
Enter, main oxygen stream and the combustion gas for paying oxygen stream combustion-supporting center jointly, combustion heating vacuum tank, maintain its internal temperature 1350 DEG C with
On.
, it is necessary to which vacuum tank is heated into more than 1350 DEG C from 800 DEG C of even lower temperature after vacuum tank is more renewed.
Specific method is to be passed through combustion gas and oxygen to the vacuum tank newly reached the standard grade by boundling top gun, when temperature is less than 800 DEG C in vacuum tank
When, first starting ignition device, combustion gas and oxygen flow are then progressively increased again；When temperature is higher than 800 degrees Celsius in vacuum tank,
Starting ignition device is not needed, is passed directly into oxygen and coal gas, and progressively enlargement discharge.
Heretofore described boundling top gun as shown in Figure 1 to Figure 3, including be coaxially disposed multilayer sleeve, shower nozzle core pipe
1st, shower nozzle outer tube 2, the multilayer sleeve are respectively water cooling outer tube 4, marine riser 5, water-cooled inner tube 6, gas inner tube 7 from outside to inside.
Water cooling outer tube 4 and water-cooled inner tube 6 and the welded seal of shower nozzle outer tube 2, gas inner tube 7 is with the grafting of shower nozzle core pipe 1 and by elastic packing
Ring seals.In the structure of the present invention, between water-cooled inner tube 6 and marine riser 5 for cooling water intake tunnel, water cooling outer tube 4 with every
It is oxygen channel between cooling water exhalant canal, water-cooled inner tube 6 and gas inner tube 7 that water pipe 5, which is, in gas inner tube 7 is that combustion gas is led to
Road, pulvis can also be passed through as needed.
Boundling top gun it is critical that shower nozzle outer tube 2 is provided with a centre bore 2a and multiple uniform around centre bore 2a
Throttle orifice 2b, throttle orifice 2b run through the upper and lower side of shower nozzle outer tube 2, and the throttle orifice 2b forms described pair of oxygen passage, throttle orifice 2b
Quantity and distance away from centre bore 2a should can set according to demand；The shower nozzle core pipe 1 is centrally formed pulvis passage, shower nozzle
Core pipe 1 is inserted in the centre bore 2a of shower nozzle outer tube 2, and institute is formed between profile surface in the external profile surface of shower nozzle core pipe 1 and shower nozzle outer tube 2
Main oxygen passage is stated, location structure is provided between shower nozzle core pipe 1 and shower nozzle outer tube 2, is led to so as to form concrete dynamic modulus annular groove shape gas
Road 8, the concrete dynamic modulus annular groove shape gas passage 8 between shower nozzle core pipe 1 and shower nozzle outer tube 2 can make oxygen by when obtain supersonic speed
Accelerate, flowed by the throttle orifice 2b of shower nozzle outer tube 2 oxygen in the outer layer ring of the main oxygen of supersonic speed around adjoint, make central supersonic jet
Extension and decay are smaller, and supersonic jet is longer, improve penetration depth and stirring intensity of the oxygen jet to molten bath, simultaneously because
Effluxvelocity decay delays, and can improve the blowing rifle position of oxygen rifle, without influenceing jet to the impact depth of molten steel, extends oxygen rifle
The service life of shower nozzle.The low velocity circulation of the throttle orifice 2b of shower nozzle outer tube 2 outflows can also be with an oxidation caused by molten steel decarburization
Carbon burning generates carbon dioxide, the resistance to material of liberated heat heating, vacuum groove, reduces molten steel temperature decrease speed.
Stepped hole 2c is provided among centre bore 2a and throttle orifice 2b in this example, intermediate casing 3 is installed in stepped hole 2c,
Intermediate casing 3 insert corresponding to shower nozzle outer 2 stepped hole 2c and by resilient sealing ring sealing, can install and take the photograph in intermediate casing 3
As auxiliary devices such as head, flame detecting device, gas ignition devices.Stepped hole 2c quantity can be 1~3, such as Fig. 4 institutes
Show, stepped hole 2c can be located at throttle orifice 2b outer rings in other embodiment (stepped hole is not shown in this figure) so that throttle orifice 2b
Closer to centre bore 2a, it so can equally play a part of outer layer ring around with stream.
In this example, profile surface is rotated around central axis by three sections of continuous buses and formed in the centre bore 2a of shower nozzle outer tube 2, first paragraph
Bus forms the reducing conical bore shunk in cross section with central axis into positive angle, and second segment bus is formed with centerline axis parallel
Isometrical cylindrical hole, the 3rd section of bus form the reducing conical bore of cross section expansion with central axis into negative angle.
Further as shown in Figures 2 and 3, shower nozzle core pipe 1 is corresponding with the isometrical cylindrical sections of centre bore 2a of shower nozzle outer tube 2 in this example
External profile surface be cancave cambered surface regular polygon cylinder, positioning rib ridge 9, the cancave cambered surface of shower nozzle core pipe 1 are formed between adjacent two cancave cambered surface
The concrete dynamic modulus annular groove shape gas passage 8, the reducing circle of shower nozzle outer tube 2 are formed with the centre bore 2a cylindrical sections of shower nozzle outer tube 2
Taper hole forms the tapered annular gas passage of Varied section product with the gabarit of shower nozzle core pipe 1.Shower nozzle core pipe 1 and shower nozzle outer tube 2 it
Between passage be formed continuously contractile ring cone section, multigap annular groove section, expanded ring cone section.
The external profile surface corresponding with the reducing circular cone hole section that the centre bore 2a of shower nozzle outer tube 2 expands of shower nozzle core pipe 1 be circular conical surface or
The face of cylinder, the polygon circumscribed circle diameter of shower nozzle core pipe 1 are equal to the cylinder bore diameter of shower nozzle outer tube 2, and shower nozzle core pipe 1 inserts shower nozzle
The annular groove space formed after the centre bore 2a of outer tube 2, it is equal to velocity of sound air-flow aditus laryngis in the total void area of the section part of cylinder hole section
Area, it is equal to area corresponding to supersonic airstream design Mach number in the total void area of conical bore exit section.
Embodiment 2
As shown in Figures 5 to 7, the difference of this example and embodiment 1 is, the positioning rib ridge 9 as location structure is
Be arranged in the interior profile surface of shower nozzle outer tube 2, as shown in Figure 6 and Figure 7, be evenly distributed on the inwall of isometrical circular hole portion at 3 or
Groove above；The groove of shower nozzle outer tube 2 forms concrete dynamic modulus annular groove shape gas passage 8, institute with the cylinder gabarit of shower nozzle core pipe 1
It is the face of cylinder to state the external profile surface corresponding with the isometrical cylindrical sections of centre bore 2a of shower nozzle outer tube 2 of shower nozzle core pipe 1, the cylinder of shower nozzle core pipe 1
Diameter is equal to the cylinder bore diameter of shower nozzle outer tube 2, and shower nozzle core pipe 1 inserts after the centre bore 2a of shower nozzle outer tube 2 the annular groove space formed,
It is equal to velocity of sound air-flow throat area, the total space of section in conical bore exit in the total void area of the section part of cylinder hole section
Area is equal to area corresponding to supersonic airstream design Mach number.
Other structures are same as Example 1.
Open up cancave cambered surface on shower nozzle outer tube 2 in above-described embodiment or groove is opened up in shower nozzle core pipe 1 and form positioning edge
The structure of ridge 9 is easy to fabricate, and throttle orifice 2b and stepped hole 2c arrangement form and quantity can be set according to the actual requirements
Put.
To sum up, the present invention makes central supersonic jet extend and decline in the outer layer increase of supersonic jet around with stream
Subtract smaller, supersonic jet is longer.Apply in RH vacuum refining furnace top guns, oxygen jet can be improved depth is penetrated to molten bath
Degree and stirring intensity, simultaneously because effluxvelocity decay delays, the blowing rifle position of oxygen rifle can be improved, reduces shower nozzle steel bonding, is reduced
Oxygen gun sprayer consumes, while does not interfere with impact depth of the jet to molten steel, extends the service life of oxygen gun sprayer.
The embodiment of the RH vacuum refining top guns using the present embodiment shower nozzle is elaborated below.
1) RH vacuum refining top guns enter vacuum chamber by the top gun sealing passage at the top of vacuum chamber, lead in top gun cooling water
Road is continually fed into cooling water.Molten steel passes in and out vacuum chamber by the dip pipe of vacuum chamber bottom.
2) oxygen decarburization smelts the phase and blows oxygen by adding aluminum temperature raising period, and the oxygen that pressure is 0.9MPa is passed through in top gun oxygen channel
Gas, central tube are passed through inert protective gas.After finishing blowing, oxygen channel inert gas purge, and continue to be blown into protectiveness
Inert gas.
3) the powder injection desulphurization phase, duff pipe (pulvis passage) is interior to be passed through the desulfurization powder conveyed by inert gas, oxygen channel
It is passed through inertia protection gas.Dust after end, duff pipe inert gas purge, oxygen channel, central tube continue to be blown into protectiveness
Inert gas.
4) heat temperature raising or except the cold steel phase, vacuum room temperature is first opened gas for ignition and lighted a fire when being less than 800 DEG C, is then turned on
Oxygen and main combustion gas, combustion gas is passed through in central tube, and oxygen channel is passed through oxygen-enriched air or pure oxygen combustion-supporting, flame monitoring sensor prison
Whether normal survey burning, finding to stop working immediately turns off combustion gas and oxygen, is passed through after inertia protection air-blowing is swept and lights a fire again again.Processing
After end, it is both needed to purge and is passed through inertia protection gas.
The present invention achieves following effect applied to RH vacuum refinings with top gun embodiment：
1) nozzle structure of the present embodiment is compared with existing nozzle structure, without being obtained using hot investment casting, manufacture difficulty
Reduced to obvious；
2) due to accelerating air-flow using annular groove slit aditus laryngis section, it is allowed to which oxygen flow can be effectively increased, and further be carried
High oxygen decarburization and the efficiency for blowing oxygen by adding aluminum heating；
3) due to using annular inert gas shielding desulfurization powder, pulvis consumption is reduced, improves recovery rate；
4) due to using pure oxygen or oxygen-enriched combustion-supporting coal gas or natural gas, hence it is evident that improve the efficiency of heating surface；
5) supersonic jet improves work rifle position, reduces consumption of cooling-water, extends the top lance spray nozzle life-span；
6) annular groove slit aditus laryngis section can substantially reduce stifled rifle probability；
7) annular groove slit aditus laryngis section can substantially reduce the influence expanded with heat and contract with cold to throat area.
8) nozzle structure of boundling top gun of the present invention can install video frequency pick-up head, directly observe space feelings below shower nozzle
Shape.
9) nozzle structure of boundling top gun of the present invention can install gas ignition device and flame monitoring instrument, realize automatic
Igniting and safety protection function.
10) nozzle structure of the present invention can make supersonic jet keep boundling state, main oxygen stream over a longer distance
Diameter and speed when can just keep exporting in longer distance.
Any person skilled in the art can all be carried out under the spirit and scope without prejudice to the present invention to above-described embodiment
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from disclosed spirit with
All equivalent modifications completed under technological thought or change, it should be covered by the claim of the present invention.
Claims (9)
- A kind of 1. high rifle position process for vacuum refining based on boundling top gun, it is characterised in that：The boundling top gun is with being located at The pulvis passage of the heart, the main oxygen passage positioned at pulvis channels peripheral and pair oxygen passage positioned at main oxygen channels peripheral；The boundling Top gun includes shower nozzle core pipe and shower nozzle outer tube, and the sprinkler core tube hub forms pulvis passage, during the shower nozzle outer tube offers Heart hole and the throttle orifice around center pore size distribution, the air inlet of the throttle orifice and gas outlet are respectively positioned on shower nozzle outer tube body, Throttle orifice penetrates shower nozzle outer tube body along shower nozzle outer tube jet direction；The throttle orifice forms described pair of oxygen passage, the shower nozzle In core pipe insertion centre bore, and positioned between shower nozzle outer tube by location structure, outside the shower nozzle core pipe external profile surface and shower nozzle The main oxygen passage is formed in pipe between profile surface, the main oxygen passage both ends are tapered annular gas passage, and middle part is concrete dynamic modulus Annular groove shape gas passage；In RH vacuum refinings, oxygen and pulvis are blown into vacuum tank by boundling top gun, oxygen is by main oxygen passage and pays oxygen Passage enters to be formed main oxygen stream and pays oxygen stream respectively, and described pair of oxygen stream forms one layer in main oxygen stream periphery around with stream, makes master Oxygen stream and pulvis form cluster fluidic, and pulvis injects molten steel, main oxygen stream punching under protection jointly in sweeping along for main oxygen stream with main oxygen stream Hit molten steel and with the carbon reaction generation carbon monoxide in molten steel, the carbon monoxide for overflowing molten steel pays oxygen stream with clustering ring around wake Generation second-time burning heating, vacuum groove.
- A kind of 2. high rifle position process for vacuum refining based on boundling top gun according to claim 1, it is characterised in that：In RH During vacuum refining, supersonic speed oxygen blast, dust and second-time burning heating process while carry out.
- A kind of 3. high rifle position process for vacuum refining based on boundling top gun according to claim 1, it is characterised in that：In RH The vacuum refining gap phase, combustion gas and oxygen are blown into vacuum tank by boundling top gun, combustion gas is blown into from pulvis passage, main oxygen stream Combustion gas with paying oxygen stream combustion-supporting center jointly, combustion heating vacuum tank；After more renewing vacuum tank, combustion gas is passed through by boundling top gun And oxygen, heating, vacuum groove.
- A kind of 4. high rifle position process for vacuum refining based on boundling top gun according to claim 1, it is characterised in that：It is described Profile surface is rotated around central axis by three sections of continuous buses and formed in shower nozzle outer tube centre bore, and first paragraph bus is with central axis into just Angle forms the reducing conical bore that cross section is shunk, and second segment bus and centerline axis parallel form isometrical cylindrical hole, the 3rd section Bus forms the reducing conical bore of cross section expansion with central axis into negative angle, and location structure is located at shower nozzle outer tube centre bore Between cylindrical hole and shower nozzle core pipe so that form concrete dynamic modulus between the second segment and shower nozzle core pipe external profile surface of shower nozzle outer tube centre bore Annular groove shape gas passage, the reducing conical bore of shower nozzle outer tube form the tapered annular gas of Varied section product with the shower nozzle core pipe gabarit Body passage, it is formed continuously contractile ring cone section, multigap annular groove section, expanded ring cone section respectively from oxygen inlet to outlet.
- A kind of 5. high rifle position process for vacuum refining based on boundling top gun according to claim 1, it is characterised in that：It is described Location structure is positioning rib ridge, and the positioning rib ridge is arranged on shower nozzle outer tube or in shower nozzle core pipe.
- A kind of 6. high rifle position process for vacuum refining based on boundling top gun according to claim 5, it is characterised in that：It is described The cylindrical hole inner wall even distribution of shower nozzle outer tube centre bore has the groove of 3 and the above, and the positioning edge is formed between adjacent two groove Ridge.
- A kind of 7. high rifle position process for vacuum refining based on boundling top gun according to claim 5, it is characterised in that：With spray It is circumferentially distributed on shower nozzle core pipe external profile surface corresponding to the cylindrical hole of head outer tube centre bore to have multiple cancave cambered surfaces, adjacent two cancave cambered surface Between form the positioning rib ridge.
- A kind of 8. high rifle position process for vacuum refining based on boundling top gun according to claim 1, it is characterised in that：It is described Mounting hole is further opened with shower nozzle outer tube, the mounting hole is sealedly provided with intermediate casing；Installed respectively in intermediate casing There are camera, igniter and flame monitoring sensor.
- A kind of 9. high rifle position process for vacuum refining based on boundling top gun according to claim 1, it is characterised in that：Also wrap The water cooling outer tube set with shower nozzle outer coaxial tube, marine riser, water-cooled inner tube, gas inner tube are included, in the water cooling outer tube and water cooling Pipe and shower nozzle outer tube welded seal；The gas inner tube is with the grafting of shower nozzle core pipe and by resilient sealing ring sealing.
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| CN201510835394.7A CN105316452B (en) | 2015-11-26 | 2015-11-26 | A kind of high rifle position process for vacuum refining based on boundling top gun |
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| CN201510835394.7A CN105316452B (en) | 2015-11-26 | 2015-11-26 | A kind of high rifle position process for vacuum refining based on boundling top gun |
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| CN106048141B (en) * | 2016-07-27 | 2018-01-30 | 中冶赛迪工程技术股份有限公司 | Reduce the method and apparatus that RH equipments install total absolute altitude |
| EP3495514A1 (en) | 2017-12-06 | 2019-06-12 | Linde Aktiengesellschaft | Process for injecting particulate material into a liquid metal bath |
| CN112458238A (en) * | 2020-10-19 | 2021-03-09 | 宝钢工程技术集团有限公司 | Novel AOD spiral side gun |
| CN114752728A (en) * | 2022-05-10 | 2022-07-15 | 振东冶金科技江苏有限公司 | Oxygen lance for blowing oxygen, spraying powder, decarbonizing and desulfurizing |
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| US6139310A (en) * | 1999-11-16 | 2000-10-31 | Praxair Technology, Inc. | System for producing a single coherent jet |
| US6875398B2 (en) * | 2003-01-15 | 2005-04-05 | Praxair Technology, Inc. | Coherent jet system with outwardly angled flame envelope ports |
| 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 |
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