CN205874480U - RH vacuum refining is round platform shape sleeve dip pipe for stove - Google Patents
RH vacuum refining is round platform shape sleeve dip pipe for stove Download PDFInfo
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- CN205874480U CN205874480U CN201620875219.0U CN201620875219U CN205874480U CN 205874480 U CN205874480 U CN 205874480U CN 201620875219 U CN201620875219 U CN 201620875219U CN 205874480 U CN205874480 U CN 205874480U
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Abstract
The utility model discloses a RH vacuum refining is round platform shape sleeve dip pipe for stove belongs to external refining of molten steel technical field. The utility model discloses a tedge and downtake, wherein the area of bottom surface is greater than the down area of bottom surface on the tedge, and the area of tedge horizontal cross -section is supreme crescent under by along its axial, the outer tube be greater than the area of time bottom surface for radius platform form hollow tube, the area of the last bottom surface of outer tube, the top of center tube links firmly through fixed beam and outer tube mutually, and center tube and outer tube are same axle center, wherein: the center tube is the tedge, and the center tube is greater than the area of bottom surface down for radius platform form hollow tube, the area of the last bottom surface of center tube, the center tube is the downtake with the annular sleeve pipe that the outer tube constitutes. The utility model discloses increase gas flow's saturation point in the molten steel, not only improved circulation flow rate, improved gaseous distribution in the molten steel flow field moreover to improve the refining effect of molten steel.
Description
Technical field
This utility model relates to molten steel furnace external refining technical field, more particularly, it relates to a kind of RH vacuum refining furnace is used
Truncated cone-shaped sleeve dip pipe.
Background technology
Rule iron company of RH Fa Shi West Germany (Ruhrstahl) and the one of the exploitation of He Laousi (Hereaeus) Joint Designing
Plant molten steel secondary refining method[1].RH method is the important means of external refining, and it has degassing, decarburization, deoxidation and uniform steel
Liquid composition and temperature, promote the effects such as non-metallic inclusion floating.RH vacuum refining furnace bottom is provided with dip pipe, RH vacuum fine
During furnace refining liquid steel, first the immersion pipe of bottom is inserted in ladle molten steel basifacial, and vacuum chamber is taken out very
Sky, is then blown into argon as driving gas so that the apparent density of molten steel in tedge in molten steel in the bottom of tedge
Less than the density in down-comer, and under the drive of argon gas bubbles, the molten steel in tedge ascends into vacuum with argon gas bubbles
Room, thus be de-gassed, decarburization, deoxygenation, after refine completes in a vacuum chamber, the molten steel in vacuum chamber is under gravity
It is back to ladle from down-comer.
Owing to, in RH vacuum refining process, molten steel is to be recycled in ladle follow by the vacuum chamber that enters continuous in ladle
Ring refine.Therefore, the circular flow of RH vacuum refining furnace is the important indicator weighing refining effect.Circular flow directly affects
The speed of the purifying reactions such as molten steel degassing, decarburization, desulfurization and effect, and limit molten steel component and equalizing temperature, so following
Circulation is the key link limiting RH vacuum refining furnace refining effect.Existing research worker is mainly by improving refining furnace
Circular flow improve RH vacuum refining furnace refining effect.Circular flow (Q) can be represented by following empirical equation:
Wherein: G is gas supply flow (unit: m3/min)；D is dip pipe diameter (unit: m)；PoFor atmospheric pressure (unit:
Pa)；P is vacuum chamber residual pressure (unit: Pa).
Can be drawn by empirical equation, circular flow becomes positive correlation with gas supply flow and dip pipe diameter, i.e. circular flow
Increase along with gas supply flow and the increase of dip pipe diameter；Circular flow becomes negative correlation, recycle stream with vacuum chamber residual pressure
Amount increases with the reduction of vacuum chamber residual pressure.Therefore, increase gas supply flow, stain pipe diameter and reduce vacuum chamber residual pressure
It it is the main path increasing RH vacuum refining furnace circular flow.But, above-mentioned approach there is problems in that 1) and increase gas supply flow
Although increasing circular flow to a certain extent, but when gas supply flow is bigger, the large percentage that gas volume accounts for so that gas
The drawing ratio of bubble declines, and reduces the circular flow of molten steel on the contrary；2) dip pipe diameter is limited by ladle size, works as ladle
Size it has been determined that, then dip pipe diameter is just difficult to increase further；3) vacuum chamber needs to consume the substantial amounts of energy,
If continuing through reduction vacuum chamber residual pressure is uneconomic to improve circular flow.Above-mentioned technical problem limits
The increase of RH vacuum refining furnace molten steel circular flow, in the urgent need to seeking suitable solution party in technology and economic angle
Case, thus improve the refining effect of RH vacuum refining furnace, reach molten steel high efficiency and the dual purpose of low cost refine.
Through retrieval, there is relevant technical scheme open.Wherein: the integral type dip pipe of RH equipment for vacuum refining is (specially
Profit number: ZL201320106192.5, the day for announcing: 2013.07.31)[2], by cancelling the tedge of dip pipe and the resistance to of down-comer
Fire lining between gap so that keep RH equipment for vacuum refining size of main body constant under conditions of, increase tedge with under
The internal diameter of fall pipe, and then increase circular flow.But, the method is extremely limited to the increase of circular flow.It addition, innovation and creation
Title: the dip pipe (patent No.: ZL201410091028.0, date of publication: 2014.06.04) used by RH equipment for vacuum refining,
Telescopic dip pipe used by RH equipment for vacuum refining (patent No.: ZL201410090574.2, the day for announcing: 2014.06.18)[3-4],
Dip pipe is set to telescopic by technique scheme, thus increases the diameter of dip pipe, to increase circular flow.By document
Retrieval is it is found that for the refining effect improving RH vacuum refining furnace, existing technical staff has defined by increasing
The diameter of dip pipe improves the mindset of circular flow.
List of references:
[1] Wang Peng .RH external refining application and research [C] // Chinese Metals Society youth Annual Conference .2010.
[2] the integral type dip pipe of Zhongye Saidi Engineering Technology Co., Ltd .RH equipment for vacuum refining: China,
ZL201320106192.5[P].2013.07.31。
[3] dip pipe used by Northeastern University .RH equipment for vacuum refining: China, ZL201410091028.0 [P]
.2014.06.04.。
[4] telescopic dip pipe used by Northeastern University .RH equipment for vacuum refining: China, ZL201410090574.2 [P]
.2014.06.18。
Utility model content
1. utility model to solve the technical problem that:
The purpose of this utility model is to overcome in prior art, and circular flow is to limit RH vacuum refining furnace refining effect
Key link, existing method is difficult to be effectively improved the deficiency of the circular flow of RH purifying method, it is provided that a kind of RH vacuum fine
Furnace truncated cone-shaped sleeve dip pipe, it is achieved the circular flow of RH vacuum refining furnace significantly increases, and significantly improves RH vacuum fine
The refining effect of furnace.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that this utility model provides is:
A kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe of the present utility model, including tedge and down-comer, its
The area of middle tedge upper bottom surface is more than the area of bottom surface, and the area of tedge horizontal cross-section is the most from the bottom to top
Being gradually increased, the area of described tedge horizontal cross-section is the continuous function about tedge axial height.Such scheme has
Following technique effect:
The area of tedge upper bottom surface is more than the area of bottom surface, thus is not changing existing RH equipment for vacuum refining to steel
In the case of bag condition of compatibility, increase the circulation area of RH vacuum refining furnace dip pipe molten steel, thus increase vacuum circulation degassing
The circular flow of device RH, to improve the refining effect of RH vacuum refining furnace.
Further, including central canal and trocar sheath, described trocar sheath is rounding mesa-shaped hollow pipe, trocar sheath upper
The area of bottom surface is more than the area of bottom surface, and the top of described central canal is fixedly connected with trocar sheath by fixing beam, and center
Pipe and trocar sheath are same axle center；Wherein: described central canal is tedge, and central canal is rounding mesa-shaped hollow pipe, center
The area of the upper bottom surface of pipe is more than the area of bottom surface；The annulus that central canal is constituted with trocar sheath is down-comer.Above-mentioned side
Case has the following technical effect that
1) central canal and trocar sheath constitute sleeve dip pipe, and central canal is tedge, the ring that central canal is constituted with trocar sheath
Shape sleeve pipe is down-comer, and dip pipe is set to sleeve shaped adaptive with ladle mouth, thus takes full advantage of the diameter of ladle mouth, increases
The big diameter of dip pipe, to improve the circular flow of RH vacuum refining furnace；
2) central canal is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of central canal is more than the area of bottom surface, so that
The area of the upper bottom surface obtaining tedge is more than the area of bottom surface, increases the circulation area of dip pipe molten steel, thus can increase true
The circular flow of idle loop degasser RH；And from down to up along central canal axis direction, the face of the horizontal cross-section of tedge
Long-pending it is gradually increased so that the pressure by molten steel in uphill process of the gas in molten steel is gradually reduced, and in molten steel, gas is formed
The volume of bubble be gradually increased, thus increase the saturation point of gas flow in molten steel, not only increase circular flow, and
Improve gas distribution in flow field of molten steel, thus promote molten steel deaerate, decarburization, deoxygenation；
3) central canal is rounding mesa-shaped hollow pipe, so that tedge is lower thin and upper thick, and molten steel stream in tedge
Logical area is gradually increased from the bottom to top, from tedge to vacuum chamber in create the circulation flow field from center to edge so that
The Flow Field Distribution of the molten steel obtaining tedge is more reasonable so that bubble becomes to fill the air distribution in molten steel, increases bubble and molten steel
Contact area, bubble molten steel rise during meet molten steel degassing dynamic conditions, for molten steel degassing, decarburization, take off
Oxygen reaction provides and ensures, creates good dynamic conditions for reactions such as non-metallic inclusion floatings；It addition, greatly reduce true
Empty indoor dead zone area so that molten steel component and homogeneous temperature are stable.
4) area of the upper bottom surface of central canal is more than the area of bottom surface, and molten steel is risen to the process at top by tedge
In, owing to the area of section of tedge is gradually increased, so that the flow velocity that molten steel is at dip pipe top is less, thus reduce
Center tube wall face is washed away by molten steel, improves the service life of dip pipe.
Further, the cone angle of described central canal is 5-30 °.Such scheme has the following technical effect that
The cone angle of central canal is 5-30 °, and appropriate cone angle makes the area face more than bottom surface of the upper bottom surface of tedge
Long-pending, so that the Flow Field Distribution of the molten steel of tedge is more reasonable, meet the dynamic conditions of liquid steel refining.
Further, the outer wall of the top of described trocar sheath correspondence position horizontal with fixing beam is provided with lower floor enter
QI KOU and upper strata air inlet, wherein lower floor's air inlet is positioned at the lower section of upper strata air inlet；Central canal inwall is provided with underlying nozzle
It is positioned on two horizontal planes differed with upper strata nozzle, described underlying nozzle and upper strata nozzle, and underlying nozzle place
Horizontal plane is positioned at the lower section of nozzle place, upper strata horizontal plane, and described lower floor's air inlet passes through lower floor's airway and underlying nozzle
Being connected, upper strata air inlet is connected with upper strata nozzle by upper strata airway.Such scheme has the following technical effect that
Central canal inwall is provided with underlying nozzle and upper strata nozzle, and underlying nozzle and upper strata nozzle pass through airway respectively
It is connected with lower floor's air inlet and upper strata air inlet so that underlying nozzle and upper strata nozzle can be adopted according to the difference of refining condition
By different supply systems, and by changing underlying nozzle and the supply system of upper strata nozzle, can effectively control in tedge
Flow Field Distribution, promoting while circular flow, the Flow Field Distribution in molten steel can controlled further, thus improve molten steel essence
Reaction condition during refining.
Further, described central canal inwall circumference is uniformly distributed with 2-6 underlying nozzle, central canal inwall
6-10 upper strata nozzle it is uniformly distributed with on circumference.Such scheme has the following technical effect that
Underlying nozzle quantity is less than the quantity of upper strata nozzle, thus sufficiently utilizes the space in dip pipe, is obviously improved
Gas flow saturation point, dramatically increases the gas flow in tedge, and this plenum system significantly extends bubble at molten steel
In flowing stroke, improve gas power of agitator.
Further, lower annular airway and upper annular airway, described lower ring it are provided with in described central canal
Shape airway and underlying nozzle are positioned in same level, and lower floor's airway is connected with underlying nozzle by lower annular airway
Logical, described upper annular airway is positioned in same level with upper strata nozzle, upper strata airway by upper annular airway with
Upper strata nozzle is connected.
Lower annular airway and upper annular airway are respectively underlying nozzle and upper strata nozzle supply, thus ensure that supply
Uniformity so that the gas in the underlying nozzle of central canal inwall and upper strata nozzle can uniformly, stably spurt into rising
Guan Zhong, thus ensure that the gas uniform stirring to molten steel of underlying nozzle and upper strata nozzle, and prevent the molten steel in tedge
There is bias current.
Further, the described underlying nozzle distance away from upper bottom surface is 5-8 times away from bottom surface distance.
Underlying nozzle centrally disposed inside pipe wall bottom, thus effectively promote the molten steel in tedge to transport in vacuum chamber
Dynamic, improve the circular flow of RH vacuum refining furnace, accelerate the smelting speed of RH vacuum refining furnace, improve metallurgical effect.
Further, described underlying nozzle and upper strata nozzle are three-port type nozzle, and the angle b between Kong Yukong is
120°。
Further, described three-port type nozzle includes the upper pore of 2 air holes and 1, and air holes is a diameter of
3-5mm, a diameter of 4-6mm of upper pore.
The three-port type nozzle of different-diameter can refine the bubble being blown in molten steel, and make that molten steel rises in tedge same
Time rotate, thus decrease dead zone area in tedge and vacuum chamber, improve refining effect.
Further, described fixing beam is set to 4-8.
3. beneficial effect
Use the technical scheme that this utility model provides, compared with existing known technology, there is following remarkable result:
(1) a kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe of the present utility model, central canal is that rounding mesa-shaped is empty
Heart pipe, the area of the upper bottom surface of central canal is more than the area of bottom surface, so that under the area of the upper bottom surface of tedge is more than
The area of bottom surface, increases the circulation area of dip pipe molten steel, thus can increase the circular flow of vacuum circulating degasser RH；And
From down to up along central canal axis direction, the area of the horizontal cross-section of tedge is gradually increased so that the gas in molten steel exists
In uphill process, the pressure by molten steel is gradually reduced, and in molten steel, the volume of the bubble that gas is formed is gradually increased, thus increases
In molten steel, the saturation point of gas flow, not only increases circular flow, and improves gas distribution in flow field of molten steel,
Promote molten steel deaerate, decarburization, deoxygenation；
(2) a kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe of the present utility model, central canal is that rounding mesa-shaped is empty
Heart pipe, so that tedge is lower thin and upper thick, molten steel circulation area in tedge is gradually increased, from the bottom to top from rising
Pipe creates the circulation flow field from center to edge in vacuum chamber, so that the Flow Field Distribution of the molten steel of tedge more adduction
Reason so that bubble becomes to fill the air distribution in molten steel, increases the contact area of bubble and molten steel so that bubble rises at molten steel
During meet the dynamic conditions of molten steel degassing, for molten steel degassing, decarburization, deoxygenation, for non-metallic inclusion floating etc.
Good dynamic conditions is created in reaction；It addition, dead zone area in greatly reducing vacuum chamber so that molten steel component and temperature are equal
Even stable；
(3) a kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe of the present utility model, central canal inwall is provided with down
Layer nozzle and upper strata nozzle, and underlying nozzle and upper strata nozzle are respectively by airway and lower floor's air inlet and upper strata air inlet phase
Connection so that underlying nozzle and upper strata nozzle can use different supply systems according to the difference of refining condition, and by changing
The supply system of underlying nozzle and upper strata nozzle, can effectively control the Flow Field Distribution in tedge, is promoting circular flow
Meanwhile, the Flow Field Distribution in molten steel can be controlled further, thus the reaction condition during improving liquid steel refining.Underlying nozzle
Quantity is less than the quantity of upper strata nozzle, thus sufficiently utilizes the space in dip pipe, is obviously improved gas flow saturation point, aobvious
Write the gas flow increased in tedge, and this plenum system significantly extends bubble movement travel in molten steel, thus
Improve the power of agitator of gas；
(4) a kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe of the present utility model, lower annular airway and upper ring
Shape airway is respectively underlying nozzle and upper strata nozzle supply, thus ensure that the uniformity of supply so that central canal inwall
Gas in underlying nozzle and upper strata nozzle can uniformly, stably spurt in tedge, thus ensure that underlying nozzle and
The gas of the upper strata nozzle uniform stirring to molten steel, and prevent the molten steel generation bias current in tedge.
Accompanying drawing explanation
Fig. 1 is the perspective view of truncated cone-shaped sleeve dip pipe of the present utility model；
Fig. 2 is the cross-sectional view of truncated cone-shaped sleeve dip pipe of the present utility model；
Fig. 3 is the central canal of the present utility model horizontal sectional view at underlying nozzle；
Fig. 4 is the central canal of the present utility model horizontal sectional view at the nozzle of upper strata；
Fig. 5 is the structural representation of underlying nozzle of the present utility model；
Fig. 6 is the cross-sectional view of underlying nozzle of the present utility model；
Fig. 7 is the overall structure schematic diagram of RH vacuum refining system of the present utility model；
Fig. 8 is the structural representation of RH vacuum refining furnace of the present utility model；
Fig. 9 is the flow chart of liquid steel refining method of the present utility model.
Label declaration in schematic diagram:
100, central canal；111, underlying nozzle；112, upper strata nozzle；121, lower floor's airway；122, upper strata airway；
131, lower floor's air inlet；132, upper strata air inlet；141, lower annular airway；142, upper annular airway；151, air holes；
152, upper pore；200, trocar sheath；300, fixing beam；400, vacuum chamber；401, flange；500, ladle seat；501, ladle；610、
First feeder；611, lower floor's steam supply valve；620, the second feeder；621, upper strata steam supply valve；700, vacuum pump；701, true
Empty valve；702, exhaust tube；800, alloy hopper.
Detailed description of the invention
For further appreciating that content of the present utility model, below in conjunction with embodiment, this utility model is further retouched
State.
Embodiment 1
Shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8 and Fig. 9, a kind of RH vacuum refining of the present embodiment
Stove truncated cone-shaped sleeve dip pipe, including tedge and down-comer, wherein the area of tedge upper bottom surface is more than the face of bottom surface
Long-pending, the wherein said horizontal cross-section that tedge upper bottom surface is tedge top, tedge bottom surface is the level bottom riser
Cross section, and the area of tedge horizontal cross-section is gradually increased the most from the bottom to top, the area of tedge horizontal cross-section is
About the continuous function of tedge axial height, the area of down-comer upper bottom surface is more than the area of bottom surface, same down-comer water
The area of plane section is gradually increased the most from the bottom to top.Dip pipe includes central canal 100 and trocar sheath 200, described
Trocar sheath 200 is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of trocar sheath 200 is more than the area of bottom surface, described center
The top of pipe 100 is fixedly connected with trocar sheath 200 by fixing beam 300, and described fixing beam 300 is set to 4, fixing beam 300
Between angle be 90 °, and central canal 100 and trocar sheath 200 are same axle center, and the cone angle of central canal 100 is 20 °, overcoat
The cone angle of pipe 200 is also 20 °, angle between pipe 100 and two buses of trocar sheath 200 shaft section centered by above-mentioned cone angle；
Wherein: described central canal 100 is tedge, and central canal 100 is rounding mesa-shaped hollow pipe, the upper bottom surface of central canal 100
Area is more than the area of bottom surface；The annulus that central canal 100 is constituted with trocar sheath 200 is down-comer.So that rise
The area of pipe upper bottom surface is more than the area of bottom surface, thus is not changing existing RH vacuum refining furnace to ladle 501 condition of compatibility
In the case of, increase the circulation area of RH vacuum refining furnace dip pipe molten steel, thus increase following of vacuum circulating degasser RH
Circulation, to improve the refining effect of RH vacuum refining furnace.
Central canal 100 and trocar sheath 200 constitute sleeve dip pipe, and central canal 100 is tedge, central canal 100 and overcoat
The annulus that pipe 200 is constituted is down-comer, dip pipe be set to sleeve shaped and with 501 mouthfuls of adaptations of ladle, thus make full use of
The diameter of ladle 501 mouthfuls, in the case of ladle 501 diameter is identical, farthest increases the diameter of dip pipe, to carry
The circular flow of high RH vacuum refining furnace.Central canal 100 is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of central canal 100 is big
In the area of bottom surface, so that the area of the upper bottom surface of tedge is more than the area of bottom surface, increase dip pipe molten steel
Circulation area, thus the circular flow of vacuum circulating degasser RH can be increased；And from down to up along central canal 100 axis side
To, the area of the horizontal cross-section of tedge is gradually increased so that the gas in molten steel in uphill process by the pressure of molten steel
Being gradually reduced, in molten steel, the volume of the bubble that gas is formed is gradually increased, thus increases the saturation point of gas flow in molten steel,
Not only increase circular flow, and improve gas distribution in flow field of molten steel, thus promote molten steel degassing, go to be mingled with
The generation of reaction；Molten steel circulation area in tedge is gradually increased from the bottom to top, produces in 400 from tedge to vacuum chamber
Liao Cong center is to the circulation flow field at edge, so that the Flow Field Distribution of the molten steel of tedge is more reasonable so that bubble is at steel
Liquid meets the dynamic conditions of molten steel degassing during rising, float for molten steel degassing, decarburization, deoxidation, non-metallic inclusion
Good dynamic conditions is created Deng reaction；It addition, greatly reduce dead zone area in vacuum chamber 400 so that molten steel component and
Homogeneous temperature is stable.
Additionally, the area of the upper bottom surface of central canal 100 is more than the area of bottom surface, molten steel is risen to top by tedge
During, owing to the area of section of tedge is gradually increased so that the molten steel flow velocity at dip pipe top is less, thus reduces
Central canal 100 wall is washed away by molten steel, thus improves the service life of dip pipe.Central canal 100 is constituted with trocar sheath 200
Annulus be down-comer, the area of down-comer upper bottom surface is more than the area of bottom surface so that the liquid level of down-comer decline with
Tedge keep coordinate, improve gas distribution in flow field of molten steel, promote molten steel deaerate, decarburization, desulphurization reaction.
It is provided with lower floor on the top of the trocar sheath 200 of the present embodiment and the outer wall of the fixing horizontal correspondence position of beam 300 to enter
QI KOU 131 and upper strata air inlet 132, wherein lower floor's air inlet 131 is positioned at the lower section of upper strata air inlet 132；Central canal 100 inwall
Being provided with underlying nozzle 111 and upper strata nozzle 112, described underlying nozzle 111 and upper strata nozzle 112 are positioned at two and differ
On horizontal plane, and the horizontal plane at underlying nozzle 111 place is positioned at the lower section of upper strata nozzle 112 place horizontal plane, described lower floor
Air inlet 131 is connected with underlying nozzle 111 by lower floor's airway 121, and upper strata air inlet 132 is by upper strata airway 122
It is connected with upper strata nozzle 112.Central canal 100 inwall is provided with underlying nozzle 111 and upper strata nozzle 112, and underlying nozzle 111
Be connected with lower floor air inlet 131 and upper strata air inlet 132 by airway respectively with upper strata nozzle 112, i.e. underlying nozzle 111
Being connected with lower floor air inlet 131 by airway, upper strata nozzle 112 is connected with upper strata air inlet 132 by airway.Make
Obtain underlying nozzle 111 and upper strata nozzle 112 can use different supply systems according to the difference of refining condition, and pass through lower floor
The supply system of nozzle 111 and upper strata nozzle 112, efficiently controls the Flow Field Distribution in tedge, is promoting circular flow
Meanwhile, the Flow Field Distribution in molten steel can be controlled further, improve the reaction condition during liquid steel refining.
4 underlying nozzle 111, central canal 100 inwall it is uniformly distributed with on the central canal 100 inwall circumference of the present embodiment
Being uniformly distributed with 8 upper strata nozzles 112 on circumference, the underlying nozzle 111 distance away from central canal 100 upper bottom surface is away from bottom surface
7 times of distance, the vertical dimension between underlying nozzle 111 and upper strata nozzle 112 is 200mm.And, underlying nozzle 111 and upper
Layer nozzle 112 is interspersed, i.e. underlying nozzle 111 and the upper strata nozzle 112 projection on bottom surface is interspersed, and appoints
The line of meaning underlying nozzle 111 and any upper strata nozzle 112 is all without the center of circle on perspective plane.Underlying nozzle 111 quantity is less than
The quantity of upper strata nozzle 112, and the supply gas pressure of underlying nozzle 111 is more than upper strata nozzle 112, underlying nozzle 111 quantity is few, confession
Atmospheric pressure is big, provides strong lifting power for the molten steel bottom tedge, promote molten steel by bottom tedge rapidly on
Rise to vacuum chamber 400, thus increase circular flow.The supply gas pressure of 8 upper strata nozzles 112 is less, so that upper strata spray
The gas of mouth 112 ejection can sufficiently spread in molten steel, thus significantly increases the saturated air-blowing quantity in molten steel, and increases RH
Circular flow.8 upper strata nozzles 112 are interspersed with above-mentioned 4 underlying nozzle 111, while promoting circular flow,
The Flow Field Distribution in molten steel can be controlled further, improve the reaction condition during liquid steel refining.
Lower annular airway 141 and upper annular airway 142, described lower annular airway it is provided with in central canal 100
141 are positioned in same level with underlying nozzle 111, and lower floor's airway 121 is by lower annular airway 141 and underlying nozzle
111 are connected, and upper annular airway 142 is positioned in same level with upper strata nozzle 112, and upper strata airway 122 is by upper ring
Shape airway 142 is connected with upper strata nozzle 112.Lower annular airway 141 and upper annular airway 142 are respectively underlying nozzle
111 and upper strata nozzle 112 supply, it is ensured that the uniformity of supply so that the underlying nozzle 111 of central canal 100 inwall and upper strata
Gas in nozzle 112 can uniformly, stably be spurted in tedge, it is ensured that underlying nozzle 111 and upper strata nozzle 112
The gas uniform stirring to molten steel, and prevent the molten steel generation bias current in tedge.
The underlying nozzle 111 of the present embodiment is three-port type nozzle, and it includes 2 air holes 151 and 1 upper pore 152, and
A diameter of 4mm of air holes 151, a diameter of 5mm of upper pore 152, and the angle b between Kong Yukong are 120 °, and three-port type sprays
Air holes 151 and upper pore 152 on mouth are uniformly distributed, and upper strata nozzle 112 is identical with the structure of underlying nozzle 111.Three
Hole type nozzle is conducive to forming rational Flow Field Distribution in tedge, and hole type nozzle can refine the bubble being blown in molten steel, for
Degassing, decarburization provide advantage；Additionally, the angle c of upper pore 152 and horizontal direction is 20 °, and tilt upward.Blow
During argon sprayed in molten steel by upper pore 152, along from the horizontal by the angle direction of 20 °, spray into rising obliquely
In the molten steel of pipe, thus provide for molten steel and rise to power, and promote the molten steel in tedge the most upwards, thus improve
Circular flow.Air holes 151 is horizontal direction, and gas is blown in molten steel in 151, air holes 151 and the collocation of upper pore 152
Use makes molten steel produce revolving force, so that molten steel rotates while rising in tedge, promotes molten steel
Stirring, decreases dead zone area in tedge and vacuum chamber 400, extends bubble flowing stroke in molten steel, accelerates refine
Speed.
A kind of RH vacuum refining system of the present embodiment, including RH vacuum refining furnace, ladle seat the 500, first feeder
610, the second feeder 620, vacuum pump 700 and alloy hopper 800, RH vacuum refining furnace bottom is provided with ladle seat 500, steel
Be provided with ladle 501 on back stall 500, described RH vacuum refining furnace by gas pipeline respectively with the first feeder 610 and
Second feeder 620 is connected, and vacuum pump 700 is connected with RH vacuum refining furnace top by exhaust tube 702, described alloy material
Bucket 800 is connected with RH vacuum refining furnace top by charge pipe.
Above-mentioned RH vacuum refining furnace, including vacuum chamber 400 and dip pipe, the bottom of vacuum chamber 400 is provided with flange 401,
Being provided with upper flange plate bottom described vacuum chamber 400, dip pipe top is provided with the purgation suitable with above-mentioned upper flange plate
Blue dish, is connected with dip pipe top by flange 401 bottom vacuum chamber 400, and dip pipe includes central canal 100 and trocar sheath
200, described trocar sheath 200 is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of trocar sheath 200 is more than the area of bottom surface,
The top of described central canal 100 is fixedly connected with trocar sheath 200 by fixing beam 300, and central canal 100 and trocar sheath 200 are
Same axle center；Wherein: central canal 100 is tedge, and central canal 100 is rounding mesa-shaped hollow pipe, the upper bottom surface of central canal 100
Area more than the area of bottom surface；The annulus that central canal 100 is constituted with trocar sheath 200 is down-comer.
Vacuum pump 700 is connected with vacuum chamber 400 top by exhaust tube 702, and the first feeder 610 passes through gas pipeline
Being connected with lower floor air inlet 131, the second feeder 620 is connected with upper strata air inlet 132 by gas pipeline.First supply dress
Put 610 and second feeder 620 corresponding respectively supply for underlying nozzle 111 and upper strata nozzle 112, the first feeder
610 provide argon for underlying nozzle 111, and the second feeder 620 provides argon for upper strata nozzle 112.Can effectively regulate and control
Underlying nozzle 111 and the gas supply flow of upper strata nozzle 112, and by the gas supply flow of regulation and control underlying nozzle 111 more than upper strata
The gas supply flow of nozzle 112 so that the Argon Bubble that underlying nozzle 111 and upper strata nozzle 112 spray into spreads in molten steel, increases
The saturated air-blowing quantity of molten steel.
Vacuum valve 701, the first feeder 610 it is provided with on exhaust tube 702 between vacuum pump 700 and vacuum chamber 400
And being provided with lower floor's steam supply valve 611 on the gas pipeline between lower floor's air inlet 131, the second described feeder 620 is with upper
It is provided with upper strata steam supply valve 621 on gas pipeline between layer air inlet 132.Vacuum valve 701 is in order to control taking out of vacuum chamber 400
Vacuum process, lower floor's steam supply valve 611 and upper strata steam supply valve 621 are respectively in order to control the first feeder 610 and the second supply dress
Put the gas supply flow of 620.
As a example by IF steel, as it is shown in figure 9, a kind of liquid steel refining method using RH vacuum refining system of the present embodiment,
Concrete step is:
Step one: pretreatment
(1) open lower floor's steam supply valve 611, provide argon by the first feeder 610 for underlying nozzle 111, argon by
First feeder 610 enters lower floor's air inlet 131, arrives underlying nozzle 111 through lower floor's airway 121, and by underlying nozzle
111 spray in molten steel, and the argon gas supply flow of the first feeder 610 is: 0.4m3/min；Open upper strata steam supply valve 621,
Thering is provided argon by the second feeder 620 for upper strata nozzle 112, argon is entered upper strata air inlet by the second feeder 620
132, arrive upper strata nozzle 112 through upper strata airway 122, and sprayed in molten steel by upper strata nozzle 112, and the second feeder
The argon gas supply flow of 620 is: 0.2m3/min；
(2) ladle 501 is with the continuous lifting of promotion of ladle seat 500, and dip pipe immerses below molten steel liquid level, dip pipe
Immersing molten steel liquid level depth below is 600mm, and wherein in molten steel, C mass concentration is 350 × 10-6, O mass fraction is 600 ×
10-6, molten steel mean temperature is 1590 DEG C.
Step 2: vacuum refining
(1) open the vacuum valve 701 of exhaust tube 702, use vacuum pump 700 that the vacuum chamber 400 of RH vacuum refining furnace is entered
Row evacuation processes；
(2) evacuation is continued, when the pressure of the vacuum chamber 400 of RH vacuum refining furnace is 5000Pa, regulation the first supply
The argon gas supply flow of device 610 is: 0.8m3/min；The argon gas supply flow of the second feeder 620 is: 0.5m3/min；When
When the pressure of the vacuum chamber 400 of RH vacuum refining furnace is 1500Pa, after vacustat, regulate the argon of the first feeder 610
Gas gas supply flow is: 1.2m3/min；The argon gas supply flow of the second feeder 620 is: 0.8m3/min；Tedge upper bottom surface
Area more than the area of bottom surface, and the area of tedge horizontal cross-section is gradually increased the most from the bottom to top, molten steel
By tedge constantly flows into vacuum chamber 400 under the driving of argon, under gravity the molten steel of vacuum chamber 400 by
Down-comer is constantly back in ladle 501, makes molten steel produce circulation；
Decarburization: molten steel is during ladle 501 circulates with vacuum chamber 400, and carbon and oxygen reaction in molten steel form CO, and
Discharged by vacuum pump 700, if the oxygen content in molten steel is inadequate, oxygen blast can be carried out by the oxygen rifle of RH vacuum refining furnace, and
Oxygen decarburization is provided；Deoxidation: at the end of decarburization, is added aluminum shot in the molten steel of vacuum chamber 400 by alloy hopper 800 and takes off
Oxygen.
Step 3: alloying
Deoxidation is added alloy raw material in the molten steel of vacuum chamber 400 by alloy hopper 800 after terminating and carries out alloying.
The alloy raw material added in alloying process is ilmenite, and after alloying completes, detection molten steel component is that middle C contains
Amount is 30 × 10-6, O content is 20 × 10-6, Ti content is 200 × 10-6Time, molten steel reaches target component and temperature then completes steel
Liquid refine, stops vacuum pump 700 evacuation and carries out vacuum breaker, and the multiple pressure of vacuum chamber 400, is in atmospheric pressure state, steel again simultaneously
Back stall 500 slowly moves down, and ladle 501 is gradually reduced along with ladle seat 500, completes liquid steel refining.
The RH equipment for vacuum refining (as shown in Figure 8) of the present embodiment, the internal diameter D3 of ladle 501 is 3212mm, and this practicality is new
The internal diameter D2 of the vacuum chamber 400 of type is 2409mm；The internal diameter D1 of dip pipe trocar sheath 200 is 1506mm；The internal diameter of central canal 100
D0 is 750mm；Trocar sheath 200 wall thickness is 260mm, and central canal 100 wall thickness is 200mm, central canal 100 and the height of trocar sheath 200
Degree is 1000mm；The gas supply flow (G) of the present embodiment RH vacuum refining furnace is 2.0m3·min-1, the i.e. first feeder 610 He
Gas supply flow (G) sum of the second feeder 620 is 2.0m3·min-1, wherein the gas supply flow of the first feeder 610 is
1.2m3·min-1, the gas supply flow of the second feeder 620 is 0.8m3·min-1, circular flow (Q) is 190t min-1, de-
The carbon time is 22.0min.Area due to tedge upper bottom surface is more than the area of bottom surface, thus is not changing existing RH vacuum
In the case of purifier is to ladle 501 condition of compatibility, increases the circulation area of RH vacuum refining furnace dip pipe molten steel, thus increase
The circular flow of big vacuum circulating degasser RH, to improve the refining effect of RH vacuum refining furnace.The horizontal cross-section of tedge
Area be gradually increased so that the pressure by molten steel in uphill process of the gas in molten steel is gradually reduced, gas in molten steel
The volume of the bubble formed is gradually increased, thus increases the saturation point of gas flow in molten steel, not only increases circular flow,
And improve gas distribution in flow field of molten steel, thus promote the speed of molten steel generation decarburizing reaction, reduce decarburization
Time, shorten smelting cycle.
Comparative example 1
Tedge and the down-comer of the RH vacuum refining furnace of comparative example 1 are to be provided separately, and are general RH vacuum refining
Stove, the internal diameter D3 of ladle 501 is 3012mm, and dip pipe tedge internal diameter is 550mm, the gas supply flow of existing RH vacuum refining furnace
(G) it is 2.0m3·min-1, when the pressure of vacuum chamber 400 is 500Pa, circular flow (Q) is 130t min-1, decarburization time is:
30.0min。
Comparative example 2
The substance of comparative example 2 leads to embodiment 1, and its difference is: the tedge of RH vacuum refining furnace and decline
Pipe includes central canal 100 and trocar sheath 200 for cylindrical shape, the dip pipe of RH vacuum refining furnace, tedge in central canal 100, in
The zone line of heart pipe 100 and trocar sheath 200 is upper bottom surface and the area phase of bottom surface of down-comer, i.e. tedge and down-comer
With, the internal diameter D3 of ladle 501 is 3012mm, and dip pipe tedge internal diameter is the gas supply flow (G) of 750mm, RH vacuum refining furnace
For 2.0m3·min-1, when the pressure of vacuum chamber 400 is 500Pa, circular flow (Q) is 160t min-1, decarburization time is:
27.8min。
Comparative example 3
The substance of comparative example 3 leads to embodiment 1, and its difference is: underlying nozzle 111 and upper strata nozzle 112 number
Measuring identical, underlying nozzle 111 and upper strata nozzle 112 are 4.The internal diameter D3 of ladle 501 is 3012mm, in dip pipe tedge
Footpath be the gas supply flow (G) of 750mm, RH vacuum refining furnace be 2.0m3·min-1, the first feeder 610 and the second supply dress
Gas supply flow (G) sum putting 620 is 2.0m3·min-1, wherein the gas supply flow of the first feeder 610 is 1m3·min-1,
The gas supply flow of the second feeder 620 is 1m3·min-1, when the pressure of vacuum chamber 400 is 500Pa, circular flow (Q) is
175t·min-1, decarburization time is: 25.6min.
Contrasted it is found that can be concluded that with comparative example 1, comparative example 2 and comparative example 3 by embodiment 1
(1) comparative example 1 is compared it can be seen that the circular flow of embodiment 1 and comparative example 2 all significantly increases, the most right
The circular flow of ratio 2 is by 130t min-1Increase to 160t min-1, decarburization time is reduced to by traditional 30min
27.8min.Its reason is: use columnar dip pipe, increases the diameter of tedge, thus significantly improves circulation
Flow；
(2) comparative example 3 and comparative example 2 carry out contrast find, comparative example 3 uses the dip pipe of truncated cone-shaped, circular flow by
160t·min-1Increase to 175t min-1, decarburization time is reduced to 25.6min by 27.8min.Its reason is: tedge
The area of horizontal cross-section is gradually increased the most from the bottom to top, increases the circulation area of dip pipe molten steel, thus can increase
The circular flow of vacuum circulating degasser RH.
(3) embodiment 1 and comparative example 3 carry out contrast discovery, and embodiment 1 uses the dip pipe of truncated cone-shaped, in central canal 100
Being uniformly distributed with 111,8 upper strata nozzles 112 of 4 underlying nozzle on wall circumference, circular flow is by 175t min-1Increase to
190t·min-1；Decarburization time is reduced to 22.0min by 25.6min.Embodiment 1 and comparative example 1 carry out contrast and find, recycle stream
Amount is by 130t min-1Increase to 190t min-1；Decarburization time is reduced to 22.0min by 30.0min.Its reason is: 1)
Central canal 100 arranges 111,8 upper strata nozzles 112 of 4 underlying nozzle, and the spray air flow of underlying nozzle 111 sprays more than upper strata
Mouth 112 so that upper strata nozzle 112 quantity is more, improves the circular flow of molten steel；2) area of tedge horizontal cross-section along
It is gradually increased the most from the bottom to top, and dip pipe of the present utility model is set to truncated cone-shaped sleeve-shaped, thus takes full advantage of
Vacuum chamber 400 base area, adds dip pipe molten steel circulation area, is combined with the less argon gas that upper strata nozzle 112 sprays into
Bubble, thus further increase the gas saturation capacity in molten steel, while increasing the bubble motive force to molten steel, improve gas
Body distribution in flow field of molten steel.
What applicant was creative proposes the tedge different by upper and lower area of section, improves molten steel in tedge
Flow Field Distribution, improves circular flow and the refining effect of molten steel.Having broken in prior art, conventional technique personnel only lead to
Cross the technology prejudice improving dip pipe diameter to improve circular flow, there is unobviousness.
Embodiment 2
The substance of the present embodiment is with embodiment 1, its difference: the liquid steel refining method of the present embodiment, step
In rapid two: continue evacuation, when the pressure of the vacuum chamber 400 of RH vacuum refining furnace is 6000Pa, regulate the first feeder
The argon gas supply flow of 610 is: 0.8m3/min；The argon gas supply flow of the second feeder 620 is: 0.5m3/min；When RH is true
When the pressure of the vacuum chamber 400 of empty refining furnace is 1500Pa, the argon gas supply flow regulating the first feeder 610 is:
1.8m3/min；The argon gas supply flow of the second feeder 620 is: 1.0m3/min；The area of tedge upper bottom surface is more than going to the bottom
The area in face, and the area of tedge horizontal cross-section is gradually increased the most from the bottom to top, molten steel is under the driving of argon
By tedge constantly flows into vacuum chamber 400, under gravity the molten steel of vacuum chamber 400 by down-comer constantly
Being back in ladle 501, make molten steel produce circulation, circular flow (Q) is 205t min-1。
Comparative example 4
Tedge and the down-comer of the RH vacuum refining furnace of this comparative example are to be provided separately, and are general RH vacuum refining
Stove, the internal diameter D3 of ladle 501 is 3012mm, and dip pipe tedge internal diameter is 550mm, the gas supply flow of existing RH vacuum refining furnace
(G) it is 2.8m3·min-1, when the pressure of vacuum chamber 400 is 500Pa, circular flow (Q) is 125t min-1。
Carry out contrasting by embodiment 1, embodiment 2, comparative example 1 and comparative example 4 it appeared that:
(1) embodiment 1 and embodiment 2 carry out contrasting it is found that work as the argon flow amount of the present invention by 2.0m3·min-1Increase
Big to 2.8m3·min-1, along with the further increase of flow of calming the anger in tedge, circular flow is by 190t min-1Increase further
It is added to 205t min-1；
(2) embodiment 2 and comparative example 4 contrast it is found that in the case of identical argon flow amount, use this utility model
A kind of RH vacuum refining furnace, circular flow is much larger than traditional RH vacuum refining furnace, thus significantly improves RH vacuum fine
The metallurgical effect of furnace；
(3) comparative example 1 is carried out with comparative example 4, when argon flow amount is by 2.0m3·min-1Increase to 2.8m3·min-1, circulation
Flow is on the contrary by 130t min-1It is reduced to 125t min-1。
The problems referred to above annoying applicant, and through a series of research, applicant is found by long research and probe,
When in the tedge of existing RH vacuum refining furnace dip pipe, air-blowing quantity is bigger, bubble is dense in tedge distribution, bubble volume
Account for larger proportion, and when air-blowing quantity increases to a certain degree, circular flow can reach saturated, if now continuing to increase
Gas flow, the ratio that gas volume accounts for is very big, owing to liquid/gas ratio is too low, easily causes bubble formation air-flow and is directly entered by nozzle
Enter vacuum chamber 400, and form gas " short-circuit ", cause bubble that the drawing ratio of molten steel is drastically declined, cause molten steel on the contrary
Circular flow diminishes.And it is found by the applicant that the area of section of tedge is gradually increased from the bottom to top, thus spread in for bubble
Providing advantage in molten steel, the pressure by molten steel in uphill process of the gas in molten steel is gradually reduced, thus increases
The saturated air-blowing quantity of molten steel, and owing to central canal 100 arranges 111,8 upper strata nozzles 112 of 4 underlying nozzle, and lower floor
The spray air flow of nozzle 111 is more than upper strata nozzle 112 so that upper strata nozzle 112 quantity is more, and the argon gas bubbles sprayed into is less,
Smaller bubble sufficiently spreads in molten steel, increase the saturation point of gas flow in molten steel, the increase of saturation point, it is to avoid gas
Bubble is directly flowed to vacuum chamber 400 by bottom and produces the phenomenon of bubble " short-circuit ", improves gas in tedge and is drawn molten steel
Efficiency.Applicant has broken in prior art, and conventional technique personnel improve circular flow only by increasing gas supply flow
Technology prejudice, there is prominent substantive distinguishing features and significantly progressive.
Embodiment 3
The substance of the present embodiment is with embodiment 1, its difference: the liquid steel refining method of the present embodiment, step
In rapid two: continue evacuation, when the pressure of the vacuum chamber 400 of RH vacuum refining furnace is 6000Pa, regulate the first feeder
The argon gas supply flow of 610 is: 0.8m3/min；The argon gas supply flow of the second feeder 620 is: 0.5m3/min；When RH is true
When the pressure of the vacuum chamber 400 of empty refining furnace is 1500Pa, the argon gas supply flow regulating the first feeder 610 is:
2.0m3/min；The argon gas supply flow of the second feeder 620 is: 1.2m3/min；The area of tedge upper bottom surface is more than going to the bottom
The area in face, and the area of tedge horizontal cross-section is gradually increased the most from the bottom to top, molten steel is under the driving of argon
By tedge constantly flows into vacuum chamber 400, under gravity the molten steel of vacuum chamber 400 by down-comer constantly
Being back in ladle 501, make molten steel produce circulation, circular flow (Q) is 195t min-1。
Central canal 100 inwall is evenly over the circumference distributed 2 underlying nozzle 111, on central canal 100 inwall circumference uniformly
6 upper strata nozzles 112 are distributed.Fixing beam 300 is set to 6, and the angle between fixing beam 300 is 60 °.Central canal 100
Cone angle be 5 °.The underlying nozzle 111 distance away from central canal 100 upper bottom surface is 5 times away from bottom surface distance.Described three-port type
Nozzle includes the upper pore 152 of 2 air holes 151 and 1, and a diameter of 3mm of air holes 151, upper pore 152 a diameter of
4mm。
Embodiment 4
The substance of the present embodiment is with embodiment 1, its difference: the liquid steel refining method of the present embodiment, step
In rapid two: continue evacuation, when the pressure of the vacuum chamber 400 of RH vacuum refining furnace is 6000Pa, regulate the first feeder
The argon gas supply flow of 610 is: 0.8m3/min；The argon gas supply flow of the second feeder 620 is: 0.5m3/min；Work as RH
When the pressure of the vacuum chamber 400 of vacuum refining furnace is 1500Pa, the argon gas supply flow regulating the first feeder 610 is:
1.0m3/min；The argon gas supply flow of the second feeder 620 is: 0.8m3/min；The area of tedge upper bottom surface is more than going to the bottom
The area in face, and the area of tedge horizontal cross-section is gradually increased the most from the bottom to top, molten steel is under the driving of argon
By tedge constantly flows into vacuum chamber 400, under gravity the molten steel of vacuum chamber 400 by down-comer constantly
Being back in ladle 501, make molten steel produce circulation, circular flow (Q) is 185t min-1。
It is uniformly distributed with 6 underlying nozzle 111, on central canal 100 inwall circumference on central canal 100 inwall circumference uniformly
10 upper strata nozzles 112 are distributed.Fixing beam 300 is set to 8, and the angle between fixing beam 300 is 45 °.Central canal 100
Cone angle be 30 °.The underlying nozzle 111 distance away from central canal 100 upper bottom surface is 8 times away from bottom surface distance.Three-port type nozzle
Including the upper pore 152 of 2 air holes 151 and 1, and a diameter of 5mm of air holes 151, a diameter of 6mm of upper pore 152.
Schematically being described this utility model and embodiment thereof above, this description does not has restricted, accompanying drawing
Shown in be also one of embodiment of the present utility model, actual structure is not limited thereto.So, if this area
Those of ordinary skill enlightened by it, creating in the case of objective without departing from this utility model, designing without creative
The frame mode similar to this technical scheme and embodiment, all should belong to protection domain of the present utility model.
Claims (10)
1. a RH vacuum refining furnace truncated cone-shaped sleeve dip pipe, it is characterised in that: include tedge and down-comer, Qi Zhongshang
The area of riser upper bottom surface is more than the area of bottom surface, and the area of tedge horizontal cross-section is the most gradually
Increasing, the area of described tedge horizontal cross-section is the continuous function about tedge axial height.
A kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe the most according to claim 1, it is characterised in that: in including
Heart pipe (100) and trocar sheath (200), described trocar sheath (200) is rounding mesa-shaped hollow pipe, the upper bottom surface of trocar sheath (200)
Area more than the area of bottom surface, the top of described central canal (100) is by fixing beam (300) and trocar sheath (200) phase
It is connected, and central canal (100) and trocar sheath (200) are same axle center；Wherein: described central canal (100) is tedge, and in
Heart pipe (100) is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of central canal (100) is more than the area of bottom surface；Central canal
(100) annulus constituted with trocar sheath (200) is down-comer.
A kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe the most according to claim 2, it is characterised in that: described
The cone angle of central canal (100) is 5-30 °.
A kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe the most according to claim 2, it is characterised in that: described
The top of trocar sheath (200) is provided with lower floor's air inlet (131) and upper strata on the outer wall of fixing beam (300) horizontal correspondence position
Air inlet (132), wherein lower floor's air inlet (131) is positioned at the lower section of upper strata air inlet (132)；Central canal (100) inwall is arranged
Underlying nozzle (111) and upper strata nozzle (112), described underlying nozzle (111) and upper strata nozzle (112) is had to be positioned at two not phases
On same horizontal plane, and the horizontal plane at underlying nozzle (111) place is positioned at the lower section of upper strata nozzle (112) place horizontal plane, institute
The lower floor's air inlet (131) stated is connected with underlying nozzle (111) by lower floor's airway (121), and upper strata air inlet (132) leads to
Cross upper strata airway (122) to be connected with upper strata nozzle (112).
A kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe the most according to claim 4, it is characterised in that: described
It is uniformly distributed with 2-6 underlying nozzle (111), on central canal (100) inwall circumference on central canal (100) inwall circumference uniformly
6-10 upper strata nozzle (112) is distributed.
A kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe the most according to claim 5, it is characterised in that: described
Lower annular airway (141) and upper annular airway (142), described lower annular airway it is provided with in central canal (100)
(141) be positioned in same level with underlying nozzle (111), lower floor's airway (121) by lower annular airway (141) with under
Layer nozzle (111) is connected, and described upper annular airway (142) is positioned in same level with upper strata nozzle (112), upper strata
Airway (122) is connected with upper strata nozzle (112) by upper annular airway (142).
A kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe the most according to claim 6, it is characterised in that: described
The underlying nozzle (111) distance away from upper bottom surface is 5-8 times away from bottom surface distance.
8. according to a kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe described in claim 4-7 any one, its feature
It is: described underlying nozzle (111) and upper strata nozzle (112) are three-port type nozzle, and the angle b between Kong Yukong is
120°。
A kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe the most according to claim 8, it is characterised in that: described
Three-port type nozzle includes 2 air holes (151) and 1 upper pore (152), and a diameter of 3-5mm of air holes (151), upper gas
A diameter of 4-6mm in hole (152).
A kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe the most according to claim 9, it is characterised in that: described
Fixing beam (300) be set to 4-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620875219.0U CN205874480U (en) | 2016-08-12 | 2016-08-12 | RH vacuum refining is round platform shape sleeve dip pipe for stove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620875219.0U CN205874480U (en) | 2016-08-12 | 2016-08-12 | RH vacuum refining is round platform shape sleeve dip pipe for stove |
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| CN205874480U true CN205874480U (en) | 2017-01-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106048142A (en) * | 2016-08-12 | 2016-10-26 | 安徽工业大学 | Truncated cone-shaped sleeve dip pipe for RH vacuum finery |
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2016
- 2016-08-12 CN CN201620875219.0U patent/CN205874480U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106048142A (en) * | 2016-08-12 | 2016-10-26 | 安徽工业大学 | Truncated cone-shaped sleeve dip pipe for RH vacuum finery |
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