CN106119466B - A kind of RH vacuum refining furnace and vacuum refining system - Google Patents
A kind of RH vacuum refining furnace and vacuum refining system Download PDFInfo
- Publication number
- CN106119466B CN106119466B CN201610662690.6A CN201610662690A CN106119466B CN 106119466 B CN106119466 B CN 106119466B CN 201610662690 A CN201610662690 A CN 201610662690A CN 106119466 B CN106119466 B CN 106119466B
- Authority
- CN
- China
- Prior art keywords
- tube
- central tube
- nozzle
- vacuum
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a kind of RH vacuum refining furnace and vacuum refining systems, belong to molten steel furnace external refining technical field.The present invention includes RH vacuum refining furnace, ladle seat, the first feeder, the second feeder, vacuum pump and alloy hopper, wherein RH vacuum refining furnace includes vacuum chamber and dip pipe, dip pipe includes central tube and outer tube, outer tube is rounding mesa-shaped hollow pipe, the area of the upper bottom surface of outer tube is greater than the area of bottom surface, the top of central tube is fixedly connected with by fixed beam and outer tube, and central tube and outer tube are same axle center；Central tube is tedge, and central tube is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of central tube is greater than the area of bottom surface；The ring sleeve that central tube and outer tube are constituted is down-comer.Invention increases the saturation points of gas flow in molten steel in vacuum refining system, not only increase circular flow, and improve distribution of the gas in flow field of molten steel, to improve the refining effect of molten steel.
Description
Technical field
The present invention relates to molten steel furnace external refining technical fields, more specifically to a kind of RH vacuum refining furnace and vacuum
Rectification systems.
Background technique
RH method is the one of Rule iron company of West Germany (Ruhrstahl) and the exploitation of He Laousi (Hereaeus) Joint Designing
Kind molten steel secondary refining method[1].RH method is the important means of external refining, has degassing, decarburization, deoxidation and uniform steel
The effects of liquid ingredient and temperature, promotion non-metallic inclusion floats.RH vacuum refining furnace lower part is provided with dip pipe, RH vacuum fine
During furnace refining liquid steel, first the dipping tube of lower part is inserted into the lower part of ladle molten steel face, and vacuum chamber take out true
Sky, then the lower part of tedge be blown into molten steel argon gas as driving gas so that in tedge molten steel apparent density
It is smaller 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, to be de-gassed, decarburization, deoxygenation, after the completion of refining in a vacuum chamber, the molten steel in vacuum chamber is under the effect of gravity
It is flowed back into ladle from down-comer.
Since in RH vacuum refining process, molten steel is followed by being constantly recycled in ladle into vacuum chamber in ladle
Ring refining.Therefore, the circular flow of RH vacuum refining furnace is the important indicator for measuring refining effect.Circular flow directly affects
The speed and effect of the purifying reactions such as molten steel degassing, decarburization, desulfurization, and molten steel component and equalizing temperature are limit, so following
Circulation is the key link for limiting RH vacuum refining furnace refining effect.Existing researcher mainly passes through raising refining furnace
Circular flow come improve improve RH vacuum refining furnace refining effect.Circular flow (Q) can be indicated by following empirical equation:
Wherein: G is gas supply flow (unit: m3/min)；D is dipping pipe diameter (unit: m)；PoFor atmospheric pressure (unit:
Pa)；P is vacuum chamber residual pressure (unit: Pa)
By empirical equation, it can be concluded that, circular flow is positively correlated with gas supply flow and dipping pipe diameter, i.e. circular flow
Increase with the increase of gas supply flow and dipping pipe diameter；Circular flow is negatively correlated with vacuum chamber residual pressure, recycle stream
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 is the main path for increasing RH vacuum refining furnace circular flow.But above-mentioned approach has the following problems: 1) increasing gas supply flow
Although increasing circular flow to a certain extent, when gas supply flow is larger, the large percentage that gas volume accounts for makes to bring about the desired sensation
The drawing ratio of bubble declines, and reduces the circular flow of molten steel instead；2) dipping pipe diameter is limited by ladle size, works as ladle
Size is it has been determined that so dipping pipe diameter is just difficult to further increase；3) vacuum chamber needs to consume a large amount of energy,
If continuing through reduces vacuum chamber residual pressure to improve circular flow be uneconomic.Above-mentioned technical problem limits RH
The increase of vacuum refining furnace molten steel circular flow, there is an urgent need to seek suitable solution from technology and economic angle,
To improve the refining effect of RH vacuum refining furnace, reach the dual purpose of molten steel high efficiency and low cost refining.
Through retrieving, there is relevant technical solution to disclose.Wherein: the integral type dip pipe of RH equipment for vacuum refining is (specially
Benefit number: ZL201320106192.5, the day for announcing: 2013.07.31)[2], by cancel dip pipe tedge and down-comer it is resistance to
Gap between fire lining, so that increasing tedge under under conditions of the size of main body of holding RH equipment for vacuum refining is constant
The internal diameter of pipe is dropped, and then increases circular flow.But this method is extremely limited to the increase of circular flow.In addition, innovation and creation
Title: dip pipe used in RH equipment for vacuum refining (patent No.: ZL201410091028.0, date of publication: 2014.06.04),
Telescopic dip pipe (patent No.: ZL201410090574.2, the day for announcing: 2014.06.18) used in RH equipment for vacuum refining[3-4],
Above-mentioned technical proposal sets telescopic for dip pipe, thus to increase the diameter of dip pipe, to increase circular flow.By document
Retrieval is it can be found that existing technical staff, which has formd, passes through increase in order to improve the refining effect of RH vacuum refining furnace
The diameter of dip pipe improves the mindset of circular flow.
Bibliography:
[1] application of Wang Peng .RH external refining 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 in Northeastern University .RH equipment for vacuum refining: China, ZL201410091028.0 [P]
.2014.06.04.
[4] telescopic dip pipe used in Northeastern University .RH equipment for vacuum refining: China, ZL201410090574.2 [P]
.2014.06.18.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to overcome in the prior art, circular flow is the pass for limiting RH vacuum refining furnace refining effect
Key link, existing method are difficult to effectively improve the deficiency of the circular flow of RH purifying method, provide a kind of RH vacuum refining furnace
And vacuum refining system, realize that the circular flow of RH vacuum refining furnace significantly increases, and improve the refining effect of RH vacuum refining furnace
Fruit.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
The bottom of a kind of RH vacuum refining furnace of the present invention, including vacuum chamber and dip pipe, the vacuum chamber is equipped with flange
Vacuum chamber at the top of flange and dip pipe by being connected, and the dip pipe includes central tube and outer tube, and the outer tube is
Rounding mesa-shaped hollow pipe, the area of the upper bottom surface of outer tube are greater than the area of bottom surface, and the top of the central tube passes through solid
Determine beam to be fixedly connected with outer tube, and central tube and outer tube are same axle center；Wherein: the central tube is tedge, and in
Heart pipe is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of central tube is greater than the area of bottom surface；Central tube and outer tube are constituted
Ring sleeve be down-comer.
1) central tube and outer tube constitute sleeve dip pipe, and central tube is tedge, the ring that central tube and outer tube are constituted
Shape casing is down-comer, and dip pipe is set as sleeve shaped and is adapted to ladle mouth, to take full advantage of the diameter of ladle mouth, is increased
The big diameter of dip pipe, to improve the circular flow of RH vacuum refining furnace；
2) central tube is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of central tube is greater than the area of bottom surface, to make
The area for obtaining the upper bottom surface of tedge is greater 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 bottom to top along central tube axis direction, the face of the horizontal cross-section of tedge
Product is gradually increased, so that the gas in molten steel is gradually reduced in uphill process by the pressure of molten steel, gas is formed in molten steel
The volume of bubble be gradually increased, to increase the saturation point of gas flow in molten steel, not only increase circular flow, and
Distribution of the gas in flow field of molten steel is improved, so that promoting molten steel occurs degassing, decarburization, deoxygenation；
3) central tube is rounding mesa-shaped hollow pipe, so that tedge is lower thin and upper thick, stream of the molten steel in tedge
Logical area is gradually increased from the bottom to top, from tedge to vacuum chamber in produce circulation flow field from center to edge, to make
Tedge molten steel Flow Field Distribution it is more reasonable so that bubble in molten steel at diffuse distribution, increase bubble and molten steel
Contact area so that bubble meets the dynamic conditions of molten steel degassing during molten steel rises, for molten steel degassing, de-
Carbon, deoxygenation provide guarantee, create good dynamic conditions for reactions such as non-metallic inclusion floatings；In addition, subtracting significantly
Dead zone area in vacuum chamber is lacked, so that molten steel component and temperature are uniform and stable.
4) area of the upper bottom surface of central tube is greater than the area of bottom surface, and molten steel is risen to the process at top by tedge
In, since the area of section of tedge is gradually increased, so that flow velocity of the molten steel at the top of dip pipe is smaller, to reduce
Molten steel washes away center tube wall face, to improve the service life of dip pipe.
Further, the cone angle of the central tube is 5-30 °.
The cone angle of central tube is 5-30 °, and appropriate cone angle makes the area of the upper bottom surface of tedge greater than the face of bottom surface
Product, so that the Flow Field Distribution of the molten steel of tedge is more reasonable, to meet the dynamic conditions of liquid steel refining.
Further, be provided on the outer wall of the top of the outer tube and the horizontal corresponding position of fixed beam lower layer into
Port and upper layer air inlet, wherein lower layer's air inlet is located at the lower section of upper layer air inlet；Center inside pipe wall is provided with underlying nozzle
With upper layer nozzle, the underlying nozzle and upper layer nozzle are located on two different horizontal planes, and where underlying nozzle
The lower section of horizontal plane where horizontal plane is located at upper layer nozzle, lower layer's air inlet pass through lower layer's gas-guide tube and underlying nozzle phase
Connection, upper layer air inlet are connected by upper layer gas-guide tube with upper layer nozzle.
Center inside pipe wall is provided with underlying nozzle and upper layer nozzle, and underlying nozzle and upper layer nozzle pass through gas-guide tube respectively
It is connected with lower layer's air inlet and upper layer air inlet, so that underlying nozzle and upper layer nozzle can be adopted according to the difference of refining condition
With different gas supply systems, and the gas supply system by changing underlying nozzle and upper layer nozzle, it can effectively control in tedge
Flow Field Distribution can further control the Flow Field Distribution in molten steel while promoting circular flow, so as to improve molten steel essence
Reaction condition during refining.
Further, 2-6 underlying nozzle, center inside pipe wall are uniformly distributed on the center inside pipe wall circumference
6-10 upper layer nozzle is uniformly distributed on circumference.
Underlying nozzle quantity is less than the quantity of upper layer nozzle, to be adequately obviously improved using the space in dip pipe
Gas flow saturation point dramatically increases the gas flow in tedge, and this plenum system significantly extends bubble in molten steel
In flowing stroke, improve the power of agitator of gas.
Further, lower annular gas-guide tube and upper annular gas-guide tube, the lower ring are provided in the central tube
Shape gas-guide tube and underlying nozzle are located in same level, and lower layer's gas-guide tube is connected by lower annular gas-guide tube with underlying nozzle
Logical, the upper annular gas-guide tube and upper layer nozzle are located in same level, upper layer gas-guide tube by upper annular gas-guide tube and
Upper layer nozzle is connected.
Lower annular gas-guide tube and upper annular gas-guide tube are respectively underlying nozzle and upper layer nozzle gas supply, to ensure that gas supply
Uniformity, allow the gas in the underlying nozzle and upper layer nozzle of center inside pipe wall uniformly, steadily to spurt into rising
Guan Zhong to ensure that uniform stirring of the gas to molten steel of underlying nozzle and upper layer nozzle, and prevents the molten steel in tedge
Bias current occurs.
Further, distance of the underlying nozzle away from upper bottom surface is 5-8 times away from bottom surface distance.
A kind of RH vacuum refining system of the invention, including RH vacuum refining furnace, ladle seat, the first feeder, second
Feeder, vacuum pump and alloy hopper, the RH vacuum refining furnace lower part are provided with ladle seat, are provided with steel on ladle seat
Packet, the RH vacuum refining furnace is connected with the first feeder and the second feeder respectively by gas pipeline, described
Vacuum pump is connected by exhaust tube with RH vacuum refining furnace top, and the alloy hopper passes through charge pipe and RH vacuum refining furnace
Top is connected；The RH vacuum refining furnace includes vacuum chamber and dip pipe, and the bottom of the vacuum chamber is equipped with flange, vacuum
By being connected at the top of flange and dip pipe, the dip pipe includes central tube and outer tube for room, and the outer tube is rounding
Mesa-shaped hollow pipe, the area of the upper bottom surface of outer tube are greater than the area of bottom surface, pass through fixed beam at the top of the central tube
It is fixedly connected with outer tube, and central tube and outer tube are same axle center；Wherein: the central tube is tedge, and central tube
For rounding mesa-shaped hollow pipe, the area of the upper bottom surface of central tube is greater than the area of bottom surface；The ring that central tube and outer tube are constituted
Shape casing is down-comer.
The area of the upper bottom surface of the tedge of RH vacuum refining system is greater than the area of bottom surface, increases dip pipe molten steel
Circulation area, thus the circular flow of vacuum circulating degasser RH can be increased；And from bottom to top along central tube (100) axis
The area in direction, the horizontal cross-section of tedge is gradually increased, so that the gas in molten steel is in uphill process by the pressure of molten steel
Power is gradually reduced, and the volume for the bubble that gas is formed in molten steel is gradually increased, to increase the saturation of gas flow in molten steel
Point not only increases circular flow, and improves distribution of the gas in flow field of molten steel.
Further, the vacuum pump is connected by exhaust tube with vacuum chamber top, first feeder
It is connected by gas pipeline with lower layer air inlet, the second feeder is connected by gas pipeline with upper layer air inlet.
First feeder and the second feeder is corresponding supplies for underlying nozzle and upper layer nozzle, can be effective
Ground regulates and controls the gas supply flow of underlying nozzle and upper layer nozzle, and is greater than upper layer nozzle by the gas supply flow of regulation underlying nozzle
Gas supply flow so that the Argon Bubble that underlying nozzle and upper layer nozzle spray into is spread in molten steel, the saturation for increasing molten steel is blown
Tolerance.
Further, it is provided with vacuum valve on the exhaust tube between the vacuum pump and vacuum chamber, described first
Lower layer's steam supply valve, second feeder and upper layer are provided on gas pipeline between feeder and lower layer's air inlet
Upper layer steam supply valve is provided on gas pipeline between air inlet.
Vacuum of the vacuum valve to control vacuum chamber, lower layer's steam supply valve and upper layer steam supply valve are respectively to control
The gas supply flow of one feeder and the second feeder.
Further, 2-6 underlying nozzle, center inside pipe wall are uniformly distributed on the center inside pipe wall circumference
6-10 upper layer nozzle is uniformly distributed on circumference.
3. beneficial effect
Using technical solution provided by the invention, compared with existing well-known technique, there is following remarkable result:
Of the invention a kind of RH vacuum refining furnace and vacuum refining system, central tube are rounding mesa-shaped hollow pipe, central tube
Upper bottom surface area be greater than bottom surface area so that the area of the upper bottom surface of tedge be greater than bottom surface area,
Increase the circulation area of dip pipe molten steel, thus the circular flow of vacuum circulating degasser RH can be increased；And edge from bottom to top
Central tube axis direction, the area of the horizontal cross-section of tedge be gradually increased so that the gas in molten steel is in uphill process
Pressure by molten steel is gradually reduced, and the volume for the bubble that gas is formed in molten steel is gradually increased, to increase gas in molten steel
The saturation point of body flow not only increases circular flow, and improves distribution of the gas in flow field of molten steel, promotes molten steel
Degassing, decarburization, deoxygenation occurs；
Central tube of the invention is rounding mesa-shaped hollow pipe, so that tedge is lower thin and upper thick, molten steel is in tedge
In circulation area be gradually increased from the bottom to top, from tedge to vacuum chamber in produce circulation flow field from center to edge,
So that the Flow Field Distribution of the molten steel of tedge is more reasonable so that bubble in molten steel at distribution is diffused, increase bubble
It is taken off with the contact area of molten steel so that bubble meets the dynamic conditions of molten steel degassing during molten steel rises for molten steel
Gas, decarburization, deoxygenation create good dynamic conditions for reactions such as non-metallic inclusion floatings；In addition, greatly reducing
Dead zone area in vacuum chamber, so that molten steel component and temperature are uniform and stable.
Center inside pipe wall of the invention is provided with underlying nozzle and upper layer nozzle, and underlying nozzle and upper layer nozzle lead to respectively
It crosses gas-guide tube to be connected with lower layer's air inlet and upper layer air inlet, so that underlying nozzle and upper layer nozzle can be according to refining conditions
Difference, using different gas supply systems, and the gas supply system by changing underlying nozzle and upper layer nozzle, it can effectively control
Flow Field Distribution in riser can further control the Flow Field Distribution in molten steel while promoting circular flow, so as to improve
Reaction condition during liquid steel refining.Underlying nozzle quantity is less than the quantity of upper layer nozzle, to adequately utilize dip pipe
Interior space is obviously improved gas flow saturation point, dramatically increases the gas flow in tedge, and this plenum system extends
Movement travel of the bubble in molten steel, to improve the power of agitator of gas.
Lower annular gas-guide tube of the invention and upper annular gas-guide tube are respectively underlying nozzle and upper layer nozzle gas supply, to protect
The uniformity for having demonstrate,proved gas supply, sprays the gas in the underlying nozzle and upper layer nozzle of center inside pipe wall uniformly, steadily
It injects in tedge, to ensure that uniform stirring of the gas to molten steel of underlying nozzle and upper layer nozzle, and prevents tedge
In molten steel occur bias current.
Detailed description of the invention
Fig. 1 is the schematic perspective view of truncated cone-shaped sleeve dip pipe of the invention；
Fig. 2 is the schematic diagram of the section structure of truncated cone-shaped sleeve dip pipe of the invention；
Fig. 3 is the horizontal sectional view of central tube of the invention at underlying nozzle；
Fig. 4 is the horizontal sectional view of central tube of the invention at the nozzle of upper layer；
Fig. 5 is the structural schematic diagram of underlying nozzle of the invention；
Fig. 6 is the schematic diagram of the section structure of underlying nozzle of the invention；
Fig. 7 is the overall structure diagram of RH vacuum refining system of the invention；
Fig. 8 is the structural schematic diagram of RH vacuum refining furnace of the invention；
Fig. 9 is the flow chart of liquid steel refining method of the invention.
Label declaration in schematic diagram:
100, central tube；111, underlying nozzle；112, upper layer nozzle；121, lower layer's gas-guide tube；122, upper layer gas-guide tube；
131, lower layer's air inlet；132, upper layer air inlet；141, lower annular gas-guide tube；142, upper annular gas-guide tube；151, air holes；
152, upper stomata；200, outer tube；300, fixed beam；400, vacuum chamber；401, flange；500, ladle seat；501, ladle；610,
First feeder；611, lower layer's steam supply valve；620, the second feeder；621, upper layer steam supply valve；700, vacuum pump；701, true
Empty valve；702, exhaust tube；800, alloy hopper.
Specific embodiment
To further appreciate that the contents of the present invention, the present invention will be further described with reference to the examples below.
Embodiment 1
In conjunction with 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
System, including RH vacuum refining furnace, ladle seat 500, the first feeder 610, the second feeder 620, vacuum pump 700 and conjunction
Golden hopper 800, RH vacuum refining furnace lower part are provided with ladle seat 500, and ladle 501 is provided on ladle seat 500, and the RH is true
Empty refining furnace is connected with the first feeder 610 and the second feeder 620 respectively by gas pipeline, and vacuum pump 700 passes through
Exhaust tube 702 is connected with RH vacuum refining furnace top, and the alloy hopper 800 passes through charge pipe and RH vacuum refining furnace top
It is connected.
The bottom of above-mentioned RH vacuum refining furnace, including vacuum chamber 400 and dip pipe, vacuum chamber 400 is equipped with flange 401,
400 bottom of vacuum chamber is provided with upper flange plate, is provided with laxative remedy compatible with above-mentioned upper flange plate at the top of dip pipe
Blue disk, 400 bottom of vacuum chamber are connected by flange 401 and dip pipe top, and dip pipe includes central tube 100 and outer tube 200,
The outer tube 200 is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of outer tube 200 is greater than the area of bottom surface, described
The top of central tube 100 be fixedly connected with outer tube 200 by fixed beam 300, and central tube 100 and outer tube 200 are same
Axle center；Wherein: central tube 100 is tedge, and central tube 100 is rounding mesa-shaped hollow pipe, the face of the upper bottom surface of central tube 100
Product is greater than the area of bottom surface；The ring sleeve that central tube 100 and outer tube 200 are constituted is down-comer.
Vacuum pump 700 is connected by exhaust tube 702 with 400 top of vacuum chamber, and the first feeder 610 passes through gas pipeline
It is connected with lower layer air inlet 131, the second feeder 620 is connected by gas pipeline with upper layer air inlet 132.First gas supply dress
Set 610 and second feeder 620 it is corresponding supplied for underlying nozzle 111 and upper layer nozzle 112, the first feeder
610 provide argon gas for underlying nozzle 111, and the second feeder 620 is that upper layer nozzle 112 provides argon gas.Can effectively it regulate and control
The gas supply flow of underlying nozzle 111 and upper layer nozzle 112, and upper layer is greater than by the gas supply flow of regulation underlying nozzle 111
The gas supply flow of nozzle 112 increases so that the Argon Bubble that underlying nozzle 111 and upper layer nozzle 112 spray into is spread in molten steel
The saturation air-blowing quantity of molten steel.
Vacuum valve 701, the first feeder 610 are provided on exhaust tube 702 between vacuum pump 700 and vacuum chamber 400
Be provided with lower layer's steam supply valve 611 on gas pipeline between lower layer air inlet 131, second feeder 620 with it is upper
Upper layer steam supply valve 621 is provided on gas pipeline between layer air inlet 132.Pumping of the vacuum valve 701 to control vacuum chamber 400
Vacuum process, lower layer's steam supply valve 611 and upper layer steam supply valve 621 are respectively to control the first feeder 610 and the second gas supply dress
Set 620 gas supply flow.
A kind of RH vacuum refining furnace truncated cone-shaped sleeve dip pipe of the present embodiment, including tedge and down-comer, wherein
The area of tedge upper bottom surface is greater than the area of bottom surface, wherein the tedge upper bottom surface is the level section at the top of tedge
Face, tedge bottom surface is the horizontal cross-section of riser bottom, and the area of tedge horizontal cross-section is axially along from the bottom to top
It is gradually increased, the area of tedge horizontal cross-section is the continuous function about tedge axial height, the face of down-comer upper bottom surface
Product is greater than the area of bottom surface, and the area of same down-comer horizontal cross-section is gradually increased from the bottom to top axially along.Dip pipe
Including central tube 100 and outer tube 200, the outer tube 200 is rounding mesa-shaped hollow pipe, the upper bottom surface of outer tube 200
Area is greater than the area of bottom surface, and the top of the central tube 100 is fixedly connected with by fixed beam 300 with outer tube 200, described
Fixed beam 300 be set as 4, the angle between fixed beam 300 is 90 °, and central tube 100 and outer tube 200 are same axis
The heart, and the cone angle of central tube 100 is 20 °, the cone angle of outer tube 200 is also 20 °, pipe 100 and housing centered on above-mentioned cone angle
Angle between pipe 200 shaft section, two buses；Wherein: the central tube 100 is tedge, and central tube 100 is rounding
Mesa-shaped hollow pipe, the area of the upper bottom surface of central tube 100 are greater than the area of bottom surface；What central tube 100 and outer tube 200 were constituted
Ring sleeve is down-comer.So that the area of tedge upper bottom surface is greater than the area of bottom surface, thus existing not changing
In the case that RH vacuum refining furnace is to 501 condition of compatibility of ladle, increase the circulation area of RH vacuum refining furnace dip pipe molten steel, from
And increase the circular flow of vacuum circulating degasser RH, to improve the refining effect of RH vacuum refining furnace.
Central tube 100 and outer tube 200 constitute sleeve dip pipe, and central tube 100 is tedge, central tube 100 and housing
The ring sleeve that pipe 200 is constituted is down-comer, and dip pipe is set as sleeve shaped and is adapted to 501 mouthfuls of ladle, to make full use of
501 mouthfuls of ladle of diameter in the identical situation of 501 diameter of ladle increases the diameter of dip pipe, to the greatest extent to mention
The circular flow of high RH vacuum refining furnace.Central tube 100 is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of central tube 100 is big
In the area of bottom surface, so that the area of the upper bottom surface of tedge is greater 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 bottom to top along 100 axis side of central tube
To the area of the horizontal cross-section of tedge is gradually increased, so that the gas in molten steel is in uphill process by the pressure of molten steel
It being gradually reduced, the volume for the bubble that gas is formed in molten steel is gradually increased, so that the saturation point of gas flow in molten steel is increased,
Circular flow is not only increased, and improves distribution of the gas in flow field of molten steel, to promote molten steel degassing, go to be mingled with
The generation of reaction；Circulation area of the molten steel in tedge is gradually increased from the bottom to top, 400 from tedge to vacuum chamber in generate
Circulation flow field from center to edge, so that the Flow Field Distribution of the molten steel of tedge is more reasonable, so that bubble is in steel
Liquid meets the dynamic conditions of molten steel degassing during rising, be molten steel degassing, decarburization, deoxidation, non-metallic inclusion floating
Good dynamic conditions is created in equal reactions；In addition, greatly reduce dead zone area in vacuum chamber 400 so that molten steel component and
Temperature is uniform and stable.
In addition, the area of the upper bottom surface of central tube 100 is greater than the area of bottom surface, molten steel rises to top by tedge
In the process, since the area of section of tedge is gradually increased, so that flow velocity of the molten steel at the top of dip pipe is smaller, to reduce
Molten steel washes away 100 wall surface of central tube, to improve the service life of dip pipe.Central tube 100 and outer tube 200 are constituted
Ring sleeve be down-comer, the area of down-comer upper bottom surface is greater than the area of bottom surface so that the liquid level decline of down-comer with
Tedge keeps cooperation, improves distribution of the gas in flow field of molten steel, promotes molten steel and degassing, decarburization, desulphurization reaction occurs.
Be provided on the top of the outer tube 200 of the present embodiment and the outer wall of the horizontal corresponding position of fixed beam 300 lower layer into
Port 131 and upper layer air inlet 132, wherein lower layer's air inlet 131 is located at the lower section of upper layer air inlet 132；100 inner wall of central tube
It is provided with underlying nozzle 111 and upper layer nozzle 112, the underlying nozzle 111 and upper layer nozzle 112 are different positioned at two
On horizontal plane, and the horizontal plane where underlying nozzle 111 is located at the lower section of 112 place horizontal plane of upper layer nozzle, the lower layer
Air inlet 131 is connected by lower layer's gas-guide tube 121 with underlying nozzle 111, and upper layer air inlet 132 passes through upper layer gas-guide tube 122
It is connected with upper layer nozzle 112.100 inner wall of central tube is provided with underlying nozzle 111 and upper layer nozzle 112, and underlying nozzle 111
It is connected respectively by gas-guide tube with lower layer air inlet 131 and upper layer air inlet 132 with upper layer nozzle 112, i.e. underlying nozzle 111
It is connected by gas-guide tube with lower layer air inlet 131, upper layer nozzle 112 is connected by gas-guide tube with upper layer air inlet 132.Make
Obtaining underlying nozzle 111 and upper layer nozzle 112 using different gas supply systems, and can pass through lower layer according to the difference of refining condition
The gas supply system of nozzle 111 and upper layer nozzle 112, efficiently controls the Flow Field Distribution in tedge, is promoting circular flow
Meanwhile the Flow Field Distribution in molten steel can be further controlled, improve the reaction condition during liquid steel refining.
4 underlying nozzles 111,100 inner wall of central tube are uniformly distributed on the 100 inner wall circumference of central tube of the present embodiment
8 upper layer nozzles 112 are uniformly distributed on circumference, distance of the underlying nozzle 111 away from 100 upper bottom surface of central tube is away from bottom surface
7 times of distance, the vertical range between underlying nozzle 111 and upper layer nozzle 112 are 200mm.Moreover, underlying nozzle 111 and upper
Layer nozzle 112 is interspersed, i.e. the projection of underlying nozzle 111 and upper layer nozzle 112 on bottom surface is interspersed, and appoints
The line of meaning underlying nozzle 111 and any upper layer nozzle 112 is all without the center of circle on perspective plane.111 quantity of underlying nozzle is less than
The quantity of upper layer nozzle 112, and the supply gas pressure of underlying nozzle 111 is greater than upper layer nozzle 112,111 quantity of underlying nozzle is few, supplies
Atmospheric pressure is big, for rise bottom of the tube molten steel strong lifting power is provided, push molten steel by rising bottom of the tube it is rapid on
Vacuum chamber 400 is risen to, to increase circular flow.The supply gas pressure of 8 upper layer nozzles 112 is smaller, so that upper layer is sprayed
The gas that mouth 112 sprays can adequately be spread in molten steel, to significantly increase the saturation air-blowing quantity in molten steel, and increase RH
Circular flow.8 upper layer nozzles 112 are interspersed with 4 above-mentioned underlying nozzles 111, while promoting circular flow,
The Flow Field Distribution in molten steel can be further controlled, the reaction condition during liquid steel refining is improved.
Lower annular gas-guide tube 141 and upper annular gas-guide tube 142, the lower annular gas-guide tube are provided in central tube 100
141 are located in same level with underlying nozzle 111, and lower layer's gas-guide tube 121 passes through lower annular gas-guide tube 141 and underlying nozzle
111 are connected, and upper annular gas-guide tube 142 is located in same level with upper layer nozzle 112, and upper layer gas-guide tube 122 passes through upper ring
Shape gas-guide tube 142 is connected with upper layer nozzle 112.Lower annular gas-guide tube 141 and upper annular gas-guide tube 142 are respectively underlying nozzle
111 and upper layer nozzle 112 supply, ensure that the uniformity of gas supply, so that the underlying nozzle 111 of 100 inner wall of central tube and upper layer
Gas in nozzle 112 uniformly, can be spurted into steadily in tedge, ensure that underlying nozzle 111 and upper layer nozzle 112
Gas prevents the molten steel in tedge from bias current occurs the uniform stirring of molten steel.
The underlying nozzle 111 of the present embodiment is three-port type nozzle comprising the upper stomata 152 of 2 air holes 151 and 1, and
The diameter of air holes 151 is 4mm, and the diameter of upper stomata 152 is 5mm, and the angle b between Kong Yukong is 120 °, three-port type spray
Air holes 151 and upper stomata 152 on mouth are uniformly distributed, and upper layer nozzle 112 is identical with the structure of underlying nozzle 111.Three
Hole type nozzle is conducive to form reasonable Flow Field Distribution in tedge, and hole type nozzle can refine the bubble being blown into molten steel, be
Degassing, decarburization provide advantage；In addition, upper stomata 152 and the angle c of horizontal direction are 20 °, and tilt upward.It blows
Argon gas is sprayed into molten steel by upper stomata 152 in the process, along the angle direction from the horizontal by 20 °, sprays into rise obliquely
In the molten steel of pipe, power is risen to provide for molten steel, and push the molten steel in tedge quickly upward, to improve
Circular flow.Air holes 151 is horizontal direction, and gas is by being blown into molten steel in 151, the collocation of air holes 151 and upper stomata 152
It uses so that molten steel, which generates rotary force, promotes molten steel so that molten steel be made to rotate while rising in tedge
Stirring, reduces dead zone area in tedge and vacuum chamber 400, extends flowing stroke of the bubble in molten steel, accelerates refining
Speed.
By taking IF steel as an example, as shown in figure 9, a kind of liquid steel refining method using RH vacuum refining system of the present embodiment,
Specific step are as follows:
Step 1: pretreatment
(1) open lower layer's steam supply valve 611, be that underlying nozzle 111 provides argon gas by the first feeder 610, argon gas by
First feeder 610 enters lower layer's air inlet 131, reaches underlying nozzle 111 through lower layer's gas-guide tube 121, and by underlying nozzle
111 spray into molten steel, and the argon gas gas supply flow of the first feeder 610 are as follows: 0.4m3/min；Upper layer steam supply valve 621 is opened,
It is that upper layer nozzle 112 provides argon gas by the second feeder 620, argon gas enters upper layer air inlet by the second feeder 620
132, upper layer nozzle 112 is reached through upper layer gas-guide tube 122, and sprayed into molten steel by upper layer nozzle 112, and the second feeder
620 argon gas gas supply flow are as follows: 0.2m3/min；
(2) ladle 501 is constantly lifted with the promotion of ladle seat 500, and dip pipe is immersed molten steel liquid level hereinafter, dip pipe
Immersion molten steel liquid level depth below is 600mm, and wherein C mass concentration is 350 × 10 in molten steel-6, O mass fraction be 600 ×
10-6, molten steel mean temperature is 1590 DEG C.
Step 2: vacuum refining
(1) vacuum valve 701 for opening exhaust tube 702, using vacuum pump 700 to the vacuum chamber 400 of RH vacuum refining furnace into
Row vacuumize process；
(2) continue to vacuumize, when the pressure of the vacuum chamber 400 of RH vacuum refining furnace is 5000Pa, adjust the first gas supply
The argon gas gas supply flow of device 610 are as follows: 0.8m3/min；The argon gas gas supply flow of second feeder 620 are as follows: 0.5m3/min；When
When the pressure of the vacuum chamber 400 of RH vacuum refining furnace is 1500Pa, after vacustat, the argon of the first feeder 610 is adjusted
Gas gas supply flow are as follows: 1.2m3/min；The argon gas gas supply flow of second feeder 620 are as follows: 0.8m3/min；Tedge upper bottom surface
Area be greater than the area of bottom surface, and the area of tedge horizontal cross-section is gradually increased from the bottom to top axially along, molten steel
By the continuous inflow vacuum chamber 400 in tedge under the driving of argon gas, under gravity the molten steel of vacuum chamber 400 by
It is constantly back in ladle 501 in down-comer, molten steel is made to generate circulation；
Decarburization: during ladle 501 and vacuum chamber 400 recycle, carbon and oxygen in molten steel react to form CO molten steel, and
It is 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, aluminum shot is added into the molten steel of vacuum chamber 400 from alloy hopper 800 and is taken off
Oxygen.
Step 3: alloying
Alloy raw material is added into the molten steel of vacuum chamber 400 from alloy hopper 800 after deoxidation and carries out alloying.
The alloy raw material being added in alloying process is ilmenite, and after alloying is completed, detection molten steel component is that middle C contains
Amount is 30 × 10-6, O content is 20 × 10-6, Ti content is 200 × 10-6When, molten steel reaches target component and temperature then completes steel
Liquid refining stops vacuum pump 700 and vacuumizes carry out vacuum breaker, while vacuum chamber 400 is pressed again, is in atmospheric pressure state, steel again
Back stall 500 slowly moves down, and ladle 501 is gradually reduced 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, of the invention
The internal diameter D2 of vacuum chamber 400 is 2409mm；The internal diameter D1 of dip pipe outer tube 200 is 1506mm；The internal diameter D0 of central tube 100 is
750mm；200 wall thickness of outer tube is 260mm, and 100 wall thickness of central tube is 200mm, and the height of central tube 100 and outer tube 200 is
1000mm；The gas supply flow (G) of the present embodiment RH vacuum refining furnace is 2.0m3·min-1, i.e. the first feeder 610 and second
The sum of gas supply flow (G) of 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 190tmin-1, take off
The carbon time is 22.0min.Since the area of tedge upper bottom surface is greater than the area of bottom surface, thus not changing existing RH vacuum
In the case that purifier is to 501 condition of compatibility of ladle, increase the circulation area of RH vacuum refining furnace dip pipe molten steel, to 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 gas in molten steel is gradually reduced in uphill process by the pressure of molten steel, gas in molten steel
The volume of the bubble of formation is gradually increased, to increase the saturation point of gas flow in molten steel, not only increases circular flow,
And distribution of the gas in flow field of molten steel is improved, to promote the rate that decarburizing reaction occurs for molten steel, reduce decarburization
Time, shorten smelting cycle.
Comparative example 1
The tedge and down-comer of the RH vacuum refining furnace of comparative example 1 are to be provided separately, as general RH vacuum refining
Furnace, the internal diameter D3 of ladle 501 are 3012mm, and it is 550mm, the gas supply flow of existing RH vacuum refining furnace that dip pipe, which rises bore,
It (G) is 2.0m3·min-1, when the pressure of vacuum chamber 400 is 500Pa, circular flow (Q) is 130tmin-1, decarburization time are as follows:
30.0min。
Comparative example 2
The basic content of comparative example 2 leads to embodiment 1, the difference is that: the tedge of RH vacuum refining furnace and decline
Pipe is cylindrical shape, and the dip pipe of RH vacuum refining furnace includes central tube 100 and outer tube 200, tedge in central tube 100, in
The intermediate region of heart pipe 100 and outer tube 200 is down-comer, i.e. the area phase of the upper bottom surface of tedge and down-comer and bottom surface
Together, the internal diameter D3 of ladle 501 is 3012mm, and it is 750mm, the gas supply flow (G) of RH vacuum refining furnace that dip pipe, which rises bore,
For 2.0m3·min-1, when the pressure of vacuum chamber 400 is 500Pa, circular flow (Q) is 160tmin-1, decarburization time are as follows:
27.8min。
Comparative example 3
The basic content of comparative example 3 leads to embodiment 1, the difference is that: underlying nozzle 111 and the number of upper layer nozzle 112
Measure identical, underlying nozzle 111 and upper layer nozzle 112 are 4.The internal diameter D3 of ladle 501 is 3012mm, in dip pipe tedge
Diameter is 750mm, and the gas supply flow (G) of RH vacuum refining furnace is 2.0m3·min-1, the first feeder 610 and the second gas supply fill
Setting the sum of 620 gas supply flow (G) is 2.0m3·min-1, wherein the gas supply flow of the first feeder 610 is 1m3·min-1,
The gas supply flow of 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 are as follows: 25.6min.
It is compared by embodiment 1 and comparative example 1, comparative example 2 and comparative example 3 it can be found that available to draw a conclusion:
(1) compared to comparative example 1 as can be seen that the circular flow of embodiment 1 and comparative example 2 all significantly increases, especially pair
The circular flow of ratio 2 is by 130tmin-1Increase to 160tmin-1, decarburization time is reduced to by traditional 30min
27.8min.Its reason is: using columnar dip pipe, the diameter of tedge is increased, to significantly improve circulation
Flow；
(2) comparative example 3 and comparative example 2 compare discovery, comparative example 3 using truncated cone-shaped dip pipe, circular flow by
160t·min-1Increase to 175tmin-1, decarburization time is reduced to 25.6min by 27.8min.Its reason is: tedge
The area of horizontal cross-section is gradually increased from the bottom to top axially along, increases the circulation area of dip pipe molten steel, thus can be increased
The circular flow of vacuum circulating degasser RH.
(3) embodiment 1 and comparative example 3 compare discovery, embodiment 1 using truncated cone-shaped dip pipe, in central tube 100
4 underlying nozzles, 111,8 upper layer nozzles 112 are uniformly distributed on wall circumference, circular flow is by 175tmin-1It increases to
190t·min-1；Decarburization time is reduced to 22.0min by 25.6min.Embodiment 1 and comparative example 1 compare discovery, recycle stream
Amount is by 130tmin-1Increase to 190tmin-1；Decarburization time is reduced to 22.0min by 30.0min.Its reason is: 1)
4 underlying nozzles, 111,8 upper layer nozzles 112 are arranged in central tube 100, and the spray air flow of underlying nozzle 111 is sprayed greater than upper layer
Mouth 112 improves the circular flow of molten steel so that nozzle 112 quantity in upper layer is more；2) area of tedge horizontal cross-section along
It is axially gradually increased from the bottom to top, and dip pipe of the invention is set as truncated cone-shaped sleeve-shaped, to take full advantage of vacuum
400 base area of room increases dip pipe molten steel circulation area, is combined with the smaller argon gas bubbles of the penetrating of upper layer nozzle 112, from
And the gas saturation capacity in molten steel is further increased, while increasing motive force of the bubble to molten steel, improves gas and exist
Distribution in flow field of molten steel.
Applicant's creativeness proposes the tedge different by upper and lower area of section, to improve molten steel in tedge
Flow Field Distribution improves the circular flow and refining effect of molten steel.Break in the prior art, conventional technique personnel are only led to
The technology prejudice for improving dipping pipe diameter to improve circular flow is crossed, there is unobviousness.
Embodiment 2
The basic content of the present embodiment with embodiment 1, the difference is that: the liquid steel refining method of the present embodiment, step
In rapid two: continuing to vacuumize, when the pressure of the vacuum chamber 400 of RH vacuum refining furnace is 6000Pa, adjust the first feeder
610 argon gas gas supply flow are as follows: 0.8m3/min；The argon gas gas supply flow of second feeder 620 are as follows: 0.5m3/min；When RH is true
When the pressure of the vacuum chamber 400 of empty refining furnace is 1500Pa, the argon gas gas supply flow of the first feeder 610 is adjusted are as follows:
1.8m3/min；The argon gas gas supply flow of second feeder 620 are as follows: 1.0m3/min；The area of tedge upper bottom surface is greater than bottom
The area in face, and the area of tedge horizontal cross-section is gradually increased from the bottom to top axially along, molten steel is under the driving of argon gas
By the continuous inflow vacuum chamber 400 in tedge, under gravity the molten steel of vacuum chamber 400 by down-comer constantly
It is back in ladle 501, molten steel is made to generate circulation, circular flow (Q) is 205tmin-1。
Comparative example 4
The tedge and down-comer of the RH vacuum refining furnace of this comparative example are to be provided separately, as general RH vacuum refining
Furnace, the internal diameter D3 of ladle 501 are 3012mm, and it is 550mm, the gas supply flow of existing RH vacuum refining furnace that dip pipe, which rises bore,
It (G) is 2.8m3·min-1, when the pressure of vacuum chamber 400 is 500Pa, circular flow (Q) is 125tmin-1。
It is compared and is can be found that by embodiment 1, embodiment 2, comparative example 1 and comparative example 4:
(1) embodiment 1 and embodiment 2 compare it can be found that when argon flow of the invention is by 2.0m3·min-1Increase
2.8m is arrived greatly3·min-1, with further increasing for flow of calming the anger in tedge, circular flow is by 190tmin-1Further increase
It is added to 205tmin-1；
(2) embodiment 2 and comparative example 4 compare it can be found that in the case where identical argon flow, using of the invention one
Kind RH vacuum refining furnace, circular flow is much larger than traditional RH vacuum refining furnace, to significantly improve RH vacuum refining furnace
Metallurgical effect；
(3) comparative example 1 and comparative example 4 carry out, when argon flow is by 2.0m3·min-1Increase to 2.8m3·min-1, circulation
Flow is instead by 130tmin-1It is reduced to 125tmin-1。
The above problem annoyings applicant, and by a series of research, applicant is had found by prolonged research and probe,
When air-blowing quantity is larger in the tedge of existing RH vacuum refining furnace dip pipe, bubble is distributed dense, bubble volume in tedge
Larger proportion is accounted for, and when air-blowing quantity increases to a certain extent, circular flow can reach saturation, at this time if continuing to increase
Gas flow, the ratio that gas volume accounts for is very big, since liquid/gas is than too low, easily cause bubble formation air-flow directly by nozzle into
Enter vacuum chamber 400, and form gas " short circuit ", causes bubble sharply to decline the drawing ratio of molten steel, cause molten steel instead
Circular flow becomes smaller.And it is found by the applicant that the area of section of tedge is gradually increased from the bottom to top, to spread in for bubble
Advantage is provided in molten steel, the gas in molten steel is gradually reduced in uphill process by the pressure of molten steel, to increase
The saturation air-blowing quantity of molten steel, and since 4 underlying nozzles 111,8 upper layer nozzles 112, and lower layer is arranged in central tube 100
The spray air flow of nozzle 111 is greater than upper layer nozzle 112, so that nozzle 112 quantity in upper layer is more, the argon gas bubbles of penetrating are smaller,
Smaller bubble is adequately spread in molten steel, increases the saturation point of gas flow in molten steel, and the increase of saturation point avoids gas
The phenomenon that bubble directly flows to vacuum chamber 400 by bottom and generates bubble " short circuit " is improved gas in tedge and is drawn to molten steel
Efficiency.Applicant has broken in the prior art, and conventional technique personnel improve circular flow only by gas supply flow is increased
Technology prejudice, have substantive distinguishing features outstanding and significant progress.
Embodiment 3
The basic content of the present embodiment with embodiment 1, the difference is that: the liquid steel refining method of the present embodiment, step
In rapid two: continuing to vacuumize, when the pressure of the vacuum chamber 400 of RH vacuum refining furnace is 6000Pa, adjust the first feeder
610 argon gas gas supply flow are as follows: 0.8m3/min；The argon gas gas supply flow of second feeder 620 are as follows: 0.5m3/min；When RH is true
When the pressure of the vacuum chamber 400 of empty refining furnace is 1500Pa, the argon gas gas supply flow of the first feeder 610 is adjusted are as follows:
2.0m3/min；The argon gas gas supply flow of second feeder 620 are as follows: 1.2m3/min；The area of tedge upper bottom surface is greater than bottom
The area in face, and the area of tedge horizontal cross-section is gradually increased from the bottom to top axially along, molten steel is under the driving of argon gas
By the continuous inflow vacuum chamber 400 in tedge, under gravity the molten steel of vacuum chamber 400 by down-comer constantly
It is back in ladle 501, molten steel is made to generate circulation, circular flow (Q) is 195tmin-1。
100 inner wall of central tube is evenly over the circumference distributed with 2 underlying nozzles 111, on 100 inner wall circumference of central tube uniformly
6 upper layer nozzles 112 are distributed with.Fixed beam 300 is set as 6, and the angle between fixed beam 300 is 60 °.Central tube 100
Cone angle be 5 °.Distance of the underlying nozzle 111 away from 100 upper bottom surface of central tube is 5 times away from bottom surface distance.The three-port type
Nozzle includes the upper stomata 152 of 2 air holes 151 and 1, and the diameter of air holes 151 is 3mm, and the diameter of upper stomata 152 is
4mm。
Embodiment 4
The basic content of the present embodiment with embodiment 1, the difference is that: the liquid steel refining method of the present embodiment, step
In rapid two: continuing to vacuumize, when the pressure of the vacuum chamber 400 of RH vacuum refining furnace is 6000Pa, adjust the first feeder
610 argon gas gas supply flow are as follows: 0.8m3/min；The argon gas gas supply flow of second feeder 620 are as follows: 0.5m3/min；When RH is true
When the pressure of the vacuum chamber 400 of empty refining furnace is 1500Pa, the argon gas gas supply flow of the first feeder 610 is adjusted are as follows:
1.0m3/min；The argon gas gas supply flow of second feeder 620 are as follows: 0.8m3/min；The area of tedge upper bottom surface is greater than bottom
The area in face, and the area of tedge horizontal cross-section is gradually increased from the bottom to top axially along, molten steel is under the driving of argon gas
By the continuous inflow vacuum chamber 400 in tedge, under gravity the molten steel of vacuum chamber 400 by down-comer constantly
It is back in ladle 501, molten steel is made to generate circulation, circular flow (Q) is 185tmin-1.
It is uniformly distributed with 6 underlying nozzles 111 on 100 inner wall circumference of central tube, on 100 inner wall circumference of central tube uniformly
10 upper layer nozzles 112 are distributed with.Fixed beam 300 is set as 8, and the angle between fixed beam 300 is 45 °.Central tube 100
Cone angle be 30 °.Distance of the underlying nozzle 111 away from 100 upper bottom surface of central tube is 8 times away from bottom surface distance.Three-port type nozzle
Including the upper stomata 152 of 2 air holes 151 and 1, and the diameter of air holes 151 is 5mm, and the diameter of upper stomata 152 is 6mm.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (9)
1. a kind of RH vacuum refining furnace, it is characterised in that: including vacuum chamber (400) and dip pipe, the vacuum chamber (400)
Bottom is equipped with flange (401), and vacuum chamber (400) is connected by flange (401) and dip pipe top, during the dip pipe includes
Heart pipe (100) and outer tube (200), the outer tube (200) are rounding mesa-shaped hollow pipe, the upper bottom surface of outer tube (200)
Area be greater than the area of bottom surface, the top of the central tube (100) passes through fixed beam (300) and outer tube (200) phase
It is connected, and central tube (100) and outer tube (200) are same axle center；Wherein: the central tube (100) is tedge, and on
The area of riser horizontal cross-section is gradually increased from the bottom to top axially along, and the area of the tedge horizontal cross-section is about upper
The continuous function of riser axial height, and central tube (100) is rounding mesa-shaped hollow pipe, the face of the upper bottom surface of central tube (100)
Product is greater than the area of bottom surface；The ring sleeve that central tube (100) and outer tube (200) are constituted is down-comer；The center
The cone angle for managing (100) is 5-30 °.
2. a kind of RH vacuum refining furnace according to claim 1, it is characterised in that: the top of the outer tube (200)
It is provided with lower layer's air inlet (131) and upper layer air inlet (132) on the outer wall of fixed beam (300) horizontal corresponding position, wherein
Lower layer's air inlet (131) is located at the lower section of upper layer air inlet (132)；Central tube (100) inner wall be provided with underlying nozzle (111) and
Upper layer nozzle (112), the underlying nozzle (111) and upper layer nozzle (112) are located on two different horizontal planes, and under
The lower section of horizontal plane, lower layer's air inlet where horizontal plane where layer nozzle (111) is located at upper layer nozzle (112)
(131) it is connected by lower layer's gas-guide tube (121) with underlying nozzle (111), upper layer air inlet (132) passes through upper layer gas-guide tube
(122) it is connected with upper layer nozzle (112).
3. a kind of RH vacuum refining furnace according to claim 2, it is characterised in that: central tube (100) the inner wall circle
It is uniformly distributed with 2-6 underlying nozzle (111), is uniformly distributed on central tube (100) inner wall circumference on 6-10 on week
Layer nozzle (112).
4. a kind of RH vacuum refining furnace according to claim 3, it is characterised in that: setting in the central tube (100)
There are lower annular gas-guide tube (141) and upper annular gas-guide tube (142), the lower annular gas-guide tube (141) and underlying nozzle (111)
In same level, lower layer's gas-guide tube (121) is connected by lower annular gas-guide tube (141) with underlying nozzle (111), institute
The upper annular gas-guide tube (142) stated and upper layer nozzle (112) are located in same level, and upper layer gas-guide tube (122) passes through upper ring
Shape gas-guide tube (142) is connected with upper layer nozzle (112).
5. a kind of RH vacuum refining furnace according to claim 4, it is characterised in that: the underlying nozzle (111) is away from upper
The distance of bottom surface is 5-8 times away from bottom surface distance.
6. a kind of RH vacuum refining system, it is characterised in that: including RH vacuum refining furnace, ladle seat (500), the first feeder
(610), the second feeder (620), vacuum pump (700) and alloy hopper (800), the RH vacuum refining furnace lower part setting
Have ladle seat (500), be provided on ladle seat (500) ladle (501), the RH vacuum refining furnace is distinguished by gas pipeline
Be connected with the first feeder (610) and the second feeder (620), the vacuum pump (700) by exhaust tube (702) with
RH vacuum refining furnace top is connected, and the alloy hopper (800) at the top of charge pipe and RH vacuum refining furnace by being connected；
Including vacuum chamber (400) and dip pipe, the bottom of the vacuum chamber (400) is equipped with flange (401), vacuum chamber (400)
By being connected at the top of flange (401) and dip pipe, the dip pipe includes central tube (100) and outer tube (200), described
Outer tube (200) is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of outer tube (200) is greater than the area of bottom surface, described
The top of central tube (100) is fixedly connected with by fixed beam (300) with outer tube (200), and central tube (100) and outer tube
It (200) is same axle center；Wherein: the central tube (100) is tedge, and the area of tedge horizontal cross-section is along its axis
To being gradually increased from the bottom to top, the area of the tedge horizontal cross-section is the continuous function about tedge axial height, and
Central tube (100) is rounding mesa-shaped hollow pipe, and the area of the upper bottom surface of central tube (100) is greater than the area of bottom surface；Central tube
(100) ring sleeve constituted with outer tube (200) is down-comer；The cone angle of the central tube (100) is 5-30 °.
7. a kind of RH vacuum refining system according to claim 6, it is characterised in that: the vacuum pump (700) passes through
Exhaust tube (702) is connected with vacuum chamber (400) top, first feeder (610) by gas pipeline and lower layer into
Port (131) is connected, and the second feeder (620) is connected by gas pipeline with upper layer air inlet (132).
8. a kind of RH vacuum refining system according to claim 7, it is characterised in that: the vacuum pump (700) and true
Be provided with vacuum valve (701) on exhaust tube (702) between empty room (400), first feeder (610) and lower layer into
It is provided on gas pipeline between port (131) lower layer's steam supply valve (611), second feeder (620) and upper layer
Upper layer steam supply valve (621) are provided on gas pipeline between air inlet (132).
9. a kind of RH vacuum refining system according to claim 8, it is characterised in that: described central tube (100) inner wall
It is uniformly distributed on circumference 2-6 underlying nozzle (111), 6-10 is uniformly distributed on central tube (100) inner wall circumference
Upper layer nozzle (112).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610662690.6A CN106119466B (en) | 2016-08-12 | 2016-08-12 | A kind of RH vacuum refining furnace and vacuum refining system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610662690.6A CN106119466B (en) | 2016-08-12 | 2016-08-12 | A kind of RH vacuum refining furnace and vacuum refining system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106119466A CN106119466A (en) | 2016-11-16 |
| CN106119466B true CN106119466B (en) | 2019-01-11 |
Family
ID=57258366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610662690.6A Active CN106119466B (en) | 2016-08-12 | 2016-08-12 | A kind of RH vacuum refining furnace and vacuum refining system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106119466B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108315529B (en) * | 2018-04-21 | 2023-12-19 | 江西理工大学 | RH refining furnace riser blowhole arrangement structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001262219A (en) * | 2000-03-22 | 2001-09-26 | Kurosaki Harima Corp | Method for lining-working of lower vessel in vacuum degassing apparatus |
| CN201793627U (en) * | 2010-08-06 | 2011-04-13 | 武汉钢铁(集团)公司 | Air feeding device used on ascending tube of RH refining furnace |
| CN202849479U (en) * | 2012-09-06 | 2013-04-03 | 北京科技大学 | Vacuum refining device |
| CN103866090A (en) * | 2014-03-12 | 2014-06-18 | 东北大学 | Sleeve type dip pipe for RH (Ruhrstahl Hereaeus) vacuum refining device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0610027A (en) * | 1992-06-24 | 1994-01-18 | Nkk Corp | Vacuum degassing refining method for molten metal |
-
2016
- 2016-08-12 CN CN201610662690.6A patent/CN106119466B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001262219A (en) * | 2000-03-22 | 2001-09-26 | Kurosaki Harima Corp | Method for lining-working of lower vessel in vacuum degassing apparatus |
| CN201793627U (en) * | 2010-08-06 | 2011-04-13 | 武汉钢铁(集团)公司 | Air feeding device used on ascending tube of RH refining furnace |
| CN202849479U (en) * | 2012-09-06 | 2013-04-03 | 北京科技大学 | Vacuum refining device |
| CN103866090A (en) * | 2014-03-12 | 2014-06-18 | 东北大学 | Sleeve type dip pipe for RH (Ruhrstahl Hereaeus) vacuum refining device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106119466A (en) | 2016-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102586616B (en) | Planetary rotating, blowing and degassing device | |
| CN104561452B (en) | Dust the device and method of single mouth vacuum deaeration refining molten steel at a kind of end | |
| WO2015058660A1 (en) | Single-impregnating-tube vacuum refining device and use thereof | |
| CN103866090B (en) | RH equipment for vacuum refining telescopic soaking tub used | |
| CN108265149A (en) | A kind of method of ring converter taphole air blowing control converter tapping slag | |
| CN106119466B (en) | A kind of RH vacuum refining furnace and vacuum refining system | |
| CN102312052A (en) | Flat single-tube vacuum refining device | |
| CN106048142B (en) | A kind of RH vacuum refining furnaces truncated cone-shaped sleeve dip pipe | |
| CN112111625B (en) | RH vacuum powder injection refining device and powder injection method thereof | |
| CN204111805U (en) | A kind of RH equipment for vacuum refining with barricade | |
| CN205874480U (en) | RH vacuum refining is round platform shape sleeve dip pipe for stove | |
| CN106148642B (en) | A kind of liquid steel refining method using RH vacuum refining systems | |
| CN201214672Y (en) | Single nozzle refining furnace | |
| US20150240323A1 (en) | Straight barrel type vacuum refining device and method for use the same | |
| CN205517664U (en) | Simulation BOF steelmaking chemical reaction gaseous product and molten bath interact's device | |
| CN205295424U (en) | High -efficient deoxidation equipment | |
| CN207498409U (en) | A kind of RH refining furnaces dip pipe | |
| CN104711395B (en) | High-performance spray gun for molten iron injection pretreatment | |
| CN107419064B (en) | Immersion jet dam ladle device and the method for improving RH molten steel internal circulating load | |
| CN113957203B (en) | Multifunctional non-centrosymmetric vacuum refining equipment | |
| CN205687963U (en) | RH vacuum tank flow-guiding type mass-impregnation pipe and equipment for vacuum refining thereof | |
| CN109868341A (en) | A kind of device and method of full bottom-blown ladle refining liquid steel | |
| CN106521098B (en) | Vacuum slot device in a kind of RH purifiers | |
| CN208995525U (en) | A kind of single mouth vacuum refining furnace with induction heating | |
| CN109706288B (en) | Device and method for refining molten steel by blowing powder to side of steel ladle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191218 Address after: 454650 tiger Ridge Industrial Agglomeration Area, Henan, Jiyuan Patentee after: Henan Jiyuan Iron & Steel (Group) Co., Ltd. Address before: 243002 Anhui province Ma'anshan Huashan Lake District Road No. 59 Patentee before: Anhui University of Technology |