CN107671251A - A kind of tundish hypoxemia position control method and device - Google Patents
A kind of tundish hypoxemia position control method and device Download PDFInfo
- Publication number
- CN107671251A CN107671251A CN201710998273.3A CN201710998273A CN107671251A CN 107671251 A CN107671251 A CN 107671251A CN 201710998273 A CN201710998273 A CN 201710998273A CN 107671251 A CN107671251 A CN 107671251A
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- tundish
- argon gas
- passed
- flow
- baking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
Abstract
The invention discloses a kind of tundish hypoxemia position control method and device, applied to continuous casting technology field, this method includes：Tundish is opened and argon gas is passed through into tundish with first flow after the baking of baking position terminates；Transported in the tundish from baking position to cast position, and tundish and receive the molten steel from ladle to centre in cast position and unwrap in the period poured, keep being passed through argon gas into tundish with first flow；Unwrapped in centre when pouring, regulation is passed through argon gas into tundish to the second flow less than first flow；During tundish pours into a mould molten steel to crystallizer, coverture is added into tundish, and keeps being passed through argon gas into tundish with second flow；After adding coverture into tundish and terminating, stop being passed through argon gas into tundish.The present invention solves the cleanliness factor of molten steel head stove molten steel and the technical problem that slab quality is not high.
Description
Technical field
The present invention relates to continuous casting technology field, more particularly to a kind of tundish hypoxemia position control method and device.
Background technology
Tundish is the intermediate receptacle between ladle and crystallizer in metallurgy industry continuous casting, in order to avoid casting cycle
Middle air enters molten steel, and the molding casting measure that current tundish is taken extensively mainly has:1) adopted between ladle and tundish
Poured into a mould with long nozzle；2) submersed nozzle molding casting is used between tundish and crystallizer；3) in steel ladle sliding water gap and length
Argon gas-sealed is passed through between the mouth of a river；4) argon gas-sealed is passed through between tundish upper nozzle and tundish immersed nozzle；5) among
The internal molten steel surface of bag adds coverture.
And existing cast measure is in actual production, used centre is unwrapped in the prior art pour during full of sky
Gas, plug hole, baking hole and stopper hole are completely exposed during pouring molten steel, and molten steel is completely naked before no addition coverture
Dew in atmosphere, causes a large amount of air-breathings, causes oxygen in air to be reacted at high temperature with various composition in molten steel, and generation is various
Field trash and reduce molten steel inherent quality and its mobility, have a strong impact on the cleanliness factor and slab quality of molten steel head stove molten steel.
The content of the invention
The embodiment of the present invention solves molten steel head stove molten steel by providing a kind of tundish hypoxemia position control method and device
Cleanliness factor and the not high technical problem of slab quality.
In a first aspect, a kind of tundish hypoxemia position control method provided in an embodiment of the present invention, including：
Tundish is opened after the baking of baking position terminates and is passed through argon gas into the tundish with first flow；
Transported in the tundish from the baking position to cast position, and the tundish and receive to come in the cast position
Unwrapped from the molten steel of ladle to the centre in the period poured, keep being passed through argon into the tundish with the first flow
Gas；
Unwrapped in the centre when pouring, regulation to the second flow less than the first flow into the tundish it is logical
Enter argon gas；
During the tundish pours into a mould molten steel to crystallizer, coverture is added into the tundish, and keep
Argon gas is passed through into the tundish with the second flow；
After adding the coverture into the tundish and terminating, stop being passed through argon gas into the tundish.
Optionally, before being toasted to the tundish in baking position, methods described also includes：
On the inclusion of the tundish slag wool is laid along edge；
The clad of the tundish is covered on after the tundish inclusion lays slag wool along edge.
Optionally, the clad of the tundish is being covered on the tundish inclusion along after edge, and
Before being toasted to the tundish in baking position, methods described also includes：
The place of covering between the clad and the lid of the tundish coats closed coating.
Optionally, the unlatching is passed through argon gas with first flow into the tundish, including：
Tundish is ceased fire after the baking of baking position terminates to the Ladle-casting apparatus for toasting the tundish；
Raise the Ladle-casting apparatus and the stopper to the tundish carries out testing rod；
When the argon gas switch installed on the outside argon gas pipeline for being connected with argon gas source is closed, by the outside
The one end for the argon gas joint that argon gas pipeline is accessed on the tundish cover；
Open the argon gas to switch to maximum opening, be passed through using maximum stream flow as the first flow into the tundish
Argon gas.
Optionally, the tundish is in cast position and opened when pouring, and adjusts to the second flow less than the first flow
Argon gas is passed through into the tundish, including:
Unwrapped in the centre when pouring, the argon gas is switched from the maximum opening and adjusted to the maximum opening
20%-30% so that the outside argon gas pipeline is passed through argon with the 20%-30% of the maximum stream flow into the tundish
Gas.
Optionally, it is described stop being passed through argon gas into the tundish after, methods described also includes：
Slag wool is covered at the overflow notch of the tundish.
Optionally, the maximum stream flow is at least 12m3/min。
Optionally, the pressure for controlling the argon gas switch position is 1 ± 0.1MPa.
Second aspect, a kind of tundish hypoxemia level control device provided in an embodiment of the present invention, including：
Argon gas is passed through control unit, for tundish after the baking of baking position terminates, opens with first flow in described
Between bag in be passed through argon gas；
Delivery unit, for being transported in the tundish from the baking position to cast position, and the tundish is in institute
State cast position and receive the molten steel from ladle to the centre and unwrap in the period poured, keep with the first flow to described
Argon gas is passed through in tundish；
Flow regulating unit, when being poured for being unwrapped in the centre, adjust to the second less than the first flow
Measure and be passed through argon gas into the tundish, during the tundish pours into a mould molten steel to crystallizer, into the tundish
Coverture is added, and keeps being passed through argon gas into the tundish with the second flow；
Argon gas stop control unit, for after the coverture is added into the tundish and is terminated, stopping to institute
State and argon gas is passed through in tundish.
Optionally, the flow regulating unit, is specifically used for:Unwrapped in the centre when pouring, by argon gas switch from
The maximum opening is adjusted to the 20%-30% of the maximum opening so that the argon gas pipeline is with the maximum stream flow
20%-30% is passed through argon gas source into the tundish.
One or more technical schemes provided in an embodiment of the present invention, at least realize following technique effect or advantage：
Because tundish is after the baking of baking position terminates, opens and argon gas is passed through into tundish with first flow；In centre
Bag is transported to cast position, and tundish from the baking position to be received the molten steel from ladle to centre in cast position and unwraps what is poured
In period, keep being passed through argon gas into tundish with first flow；Unwrap when pouring, adjusted to less than first flow in centre
Second flow argon gas is passed through into tundish；During tundish pours into a mould molten steel to crystallizer, keep with second flow
Argon gas is passed through into tundish, while coverture is added into tundish, after coverture is added into tundish and is terminated, is stopped
Argon gas is only passed through into tundish.Therefore when extremely being added after baking of tundish terminates to tundish before coverture terminates
Between in section, argon gas has been continually fed into tundish, so as to avoid molten steel surface in tundish from opening the process of pouring and air contact, with
Reduce tundish and opening the oxidizing atmosphere for the process of pouring, prevent the secondary oxidation of exposed molten steel, to improve molten steel head stove steel
The cleanliness factor and slab quality of liquid.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, for this
For the those of ordinary skill of field, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other
Accompanying drawing.
Fig. 1 is the flow chart of tundish hypoxemia position control method provided in an embodiment of the present invention；
Fig. 2 is the module map of tundish hypoxemia level control device provided in an embodiment of the present invention.
Embodiment
The embodiment of the present invention solves the cleaning of molten steel head stove molten steel by providing a kind of tundish hypoxemia position control method
Degree and the not high technical problem of slab quality, the general thought of tundish hypoxemia position control method provided in an embodiment of the present invention is such as
Under：
Extremely add in the period that coverture terminates, keep to tundish into tundish after baking of tundish terminates
Argon gas is inside passed through, the process of pouring and air contact are being opened so as to avoid tundish molten steel surface, process tundish is poured to reduce to open
Oxidizing atmosphere, the secondary oxidation of exposed molten steel is prevented, to reach the cleanliness factor and slab quality that improve molten steel head stove molten steel.
In order to be better understood from above-mentioned technical proposal, below in conjunction with Figure of description and specific embodiment to upper
Technical scheme is stated to be described in detail.
With reference to shown in figure 1, a kind of tundish hypoxemia position control method provided in an embodiment of the present invention comprises the following steps：
S101, tundish are opened and argon gas are passed through into tundish with first flow after the baking of baking position terminates.
Specifically, opened since tundish at the time of the baking for toasting position terminates with first flow into tundish
It is passed through argon gas.
Specifically, S101 comprises the following steps：
First, S1011 is performed：Tundish is ceased fire after the baking of baking position terminates to the Ladle-casting apparatus for toasting tundish；
Then, S1012 is performed：After raising Ladle-casting apparatus, the stopper of tundish is carried out testing rod.
Then, S1013 is performed：The argon gas switch installed on the outside argon gas pipeline for being connected with argon gas source is in closing shape
During state, the one end for the argon gas joint that outside argon gas pipeline is accessed on tundish cover.
In specific implementation process, the other end of argon gas joint is connected to tunger tube in clad, and three parts are distinguished in clad
It is equipped with tunger tube in clad.Argon gas source is injected into tundish by tunger tube in outside argon gas pipeline, argon gas joint, clad
It is interior.
Then, S1014 is performed：Open argon gas to switch to maximum opening, be maximum stream flow into tundish using first flow
It is passed through argon gas.
It should be noted that argon gas switch corresponds to maximum stream flow in maximum opening.It is maximum in specific implementation process
Flow can be 12m3/ min, the diameter of outside argon gas pipeline can be 3cm, and the pressure of argon gas switch is 1MPa.Specifically, argon
Air cock is specifically as follows gas valve.
S102, tundish from baking position transport to cast position, and tundish it is described cast position receive come from ladle
Molten steel to centre unwrap in the period poured, keep being passed through argon gas into tundish with first flow.
S103, unwrapped in centre when pouring, regulation is passed through argon gas into tundish to the second flow less than first flow.
Specifically, second flow is the 20%-30% of maximum opening.Then S103 is specially：Unwrapped in centre when pouring, by argon
Air cock is adjusted to the 20%-30% of maximum opening from maximum opening so that outside argon gas pipeline is with the 20%- of maximum stream flow
30% is passed through argon gas into tundish.
Can be 12m with maximum stream flow3Exemplified by/min, then second flow is 2.4~3.6m3/min.Then unwrap and pour in centre
When, adjust to 2.4~3.6m3/ min is passed through argon gas into tundish.For example unwrap and adjusted when pouring to 2.4m in centre3/
Min is passed through argon gas into tundish, can also unwrap and be adjusted when pouring to 3.6m in centre3/ min is passed through argon into tundish
Gas.Second flow may be arranged as 2.5m3/min、2.6m3/min、2.7m3/min、2.8m3/min、2.9m3/min、3.0m3/
min、3.1m3/min、3.2m3/min、3.3m3/min、3.4m3/min、3.5m3One in/min.
It should be noted that being unwrapped in centre when pouring and to during pouring into a mould molten steel to crystallizer, ladle keep to
Basket pouring molten steel.
S104, during tundish pours into a mould molten steel to crystallizer, add coverture into tundish, and keep with the
Two flows are passed through argon gas into tundish.
S105, added into tundish after coverture terminates, stopping being passed through argon gas into tundish.
In specific implementation process, after stopping being passed through argon gas into tundish, outside argon gas pipeline and argon are also disconnected
Connection between gas joint.
With reference to previous embodiment, in a further embodiment, further avoid opening pour process tundish molten steel surface with
The contact of air, in one embodiment, tundish before baking position is toasted, is also being comprised the following steps：In centre
On the inclusion of bag slag wool is laid along edge；The clad of tundish is covered on after the laying slag wool of tundish inclusion along side
Edge, to ensure not having gap between tundish inclusion and pouring basket lid.So as to reduce the molten steel that air enters tundish
In.
In one embodiment, along edge on after the clad of tundish to be covered to the laying slag wool in tundish inclusion
Afterwards, and before being toasted to the tundish in baking position, in addition to：Between the clad and lid of tundish
Cover place and coat closed coating.Specifically, gasket coating can be coating.
In one embodiment, stop being passed through after argon gas into tundish, in addition to：Covered at the overflow notch of tundish
Lid slag wool.
Below, a specific embodiment is provided：In tundish renovation region, by tundish along edge layer overlay slag wool,
Ensure there is no gap between tundish inclusion and pouring basket lid；
After baking of tundish, cease fire lift Ladle-casting apparatus, test rod after operative employee tunger tube is respectively connected to tundish cover argon gas
Joint, now ensure that argon gas gas source switch remains turned-off；
Outside argon gas pipeline is connected, argon gas is opened to switch after to maximum, opening to cast position and closed to the 20%- of aperture
30%；
Pour subnormal open to pour, coverture closes argon gas source of the gas after adding, and disconnects argon blowing pipeline；
Slag wool is covered at overflow notch.
Slag wool between tundish inclusion and clad ensures no gap, if there is gap, is filled up with coating；Argon gas
Pipe is laid in tundish cover, and the three parts of clad lay argon gas pipeline respectively；Outside argon gas pipeline diameter about 3cm, valve
Locate pressure about 1MPa, maximum stream flow 12m3/min；Oxygen quality fraction in tundish can be down to 1% by method about 4.5min.
Based on same inventive concept, the embodiments of the invention provide a kind of tundish hypoxemia level control device, with reference to the institute of figure 2
Show, including following structure：
Argon gas is passed through control unit 201, for tundish after the baking of baking position terminates, opens with first flow to centre
Argon gas is passed through in bag；
Delivery unit 202, receive to come in cast position for transporting to cast position, and tundish from baking position in tundish
Unwrapped from the molten steel of ladle to centre in the period poured, keep being passed through argon gas into tundish with first flow；
Flow regulating unit 203, when being poured for being unwrapped in centre, regulation to the second flow less than first flow in
Between be passed through argon gas in bag, and during tundish pours into a mould molten steel to crystallizer, coverture is added into tundish, and protect
Hold and argon gas is passed through into tundish with second flow；
Argon gas stop control unit 204, for after coverture is added into tundish and is terminated, stopping into tundish
It is passed through argon gas.
Specifically, flow regulating unit, is specifically used for:Unwrapped in centre when pouring, argon gas switch is adjusted from maximum opening
To the 20%-30% of maximum opening so that outside argon gas pipeline is passed through argon into tundish with the 20%-30% of maximum stream flow
Gas.
One or more embodiments provided by the invention, at least realize following technique effect or advantage：
Because tundish is after the baking of baking position terminates, argon gas is passed through into tundish with first flow；With first flow
During being passed through argon gas into tundish, tundish is transported to cast position from baking position；Tundish is opened in cast position and poured
When, regulation is passed through argon gas into tundish to the second flow less than first flow；In the casting process of tundish, keep
While argon gas is passed through into tundish with second flow, coverture is added into tundish；After coverture addition terminates, stop
Argon gas is only passed through into tundish.Therefore covering is added to the inside molten steel surface to tundish after baking of tundish terminates
Before agent terminates, argon gas has been continually fed into tundish, so as to avoid tundish molten steel surface from opening the process of pouring and air contact,
Process tundish oxidizing atmosphere is poured to reduce to open, prevents the secondary oxidation of exposed molten steel, and then improves molten steel head stove steel
The cleanliness factor and slab quality of liquid.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
- A kind of 1. tundish hypoxemia position control method, it is characterised in that including：Tundish is opened after the baking of baking position terminates and is passed through argon gas into the tundish with first flow；Transported in the tundish from the baking position to cast position, and the tundish and receive to come from steel in the cast position The molten steel of bag to the centre was unwrapped in the period poured, and kept being passed through argon gas into the tundish with the first flow；Unwrapped in the centre when pouring, regulation is passed through argon to the second flow less than the first flow into the tundish Gas；During the tundish pours into a mould molten steel to crystallizer, coverture is added into the tundish, and keep with institute State second flow and be passed through argon gas into the tundish；After adding the coverture into the tundish and terminating, stop being passed through argon gas into the tundish.
- 2. tundish hypoxemia position control method as claimed in claim 1, it is characterised in that to the tundish in baking position Before being toasted, methods described also includes：On the inclusion of the tundish slag wool is laid along edge；The clad of the tundish is covered on after the tundish inclusion lays slag wool along edge.
- 3. tundish hypoxemia position control method as claimed in claim 2, it is characterised in that by the clad lid of the tundish Close on the tundish inclusion along after edge, and before being toasted to the tundish in baking position, it is described Method also includes：The place of covering between the clad and the lid of the tundish coats closed coating.
- 4. tundish hypoxemia position control method as claimed in claim 2, it is characterised in that the unlatching is with first flow to institute State and argon gas is passed through in tundish, including：Tundish is ceased fire after the baking of baking position terminates to the Ladle-casting apparatus for toasting the tundish；Raise the Ladle-casting apparatus and the stopper to the tundish carries out testing rod；When the argon gas switch installed on the outside argon gas pipeline for being connected with argon gas source is closed, by the outside argon gas The one end for the argon gas joint that pipeline is accessed on the tundish cover；Open the argon gas to switch to maximum opening, into the tundish argon is passed through using maximum stream flow as the first flow Gas.
- 5. the method as described in claim 1 or device, it is characterised in that the tundish is in cast position and opened when pouring, regulation Argon gas is extremely passed through into the tundish with the second flow less than the first flow, including:Unwrapped in the centre when pouring, the argon gas is switched from the maximum opening and adjusted to the 20%- of the maximum opening 30% so that the outside argon gas pipeline is passed through argon gas with the 20%-30% of the maximum stream flow into the tundish.
- 6. the tundish hypoxemia position control method as described in any in claim 1-4, it is characterised in that stop described to institute State in tundish and be passed through after argon gas, methods described also includes：Slag wool is covered at the overflow notch of the tundish.
- 7. the tundish hypoxemia position control method as described in claim 4 or 5, it is characterised in that the maximum stream flow is at least 12m3/min。
- 8. the tundish hypoxemia position control method as described in claim 3 or 4, it is characterised in that control the argon gas switch institute Pressure in position is 1 ± 0.1MPa.
- A kind of 9. tundish hypoxemia level control device, it is characterised in that including：Argon gas is passed through control unit, for tundish after the baking of baking position terminates, opens with first flow to the tundish Inside it is passed through argon gas；Delivery unit, poured for being transported in the tundish from the baking position to cast position, and the tundish described Note position receives the molten steel from ladle to the centre and unwrapped in the period poured, and keeps with the first flow to the centre Argon gas is passed through in bag；Flow regulating unit, when being poured for being unwrapped in the centre, regulation to the second flow less than the first flow to Argon gas is passed through in the tundish, during the tundish pours into a mould molten steel to crystallizer, is added into the tundish Coverture, and keep being passed through argon gas into the tundish with the second flow；Argon gas stop control unit, for after the coverture is added into the tundish and is terminated, stopping in described Between bag in be passed through argon gas.
- 10. device as claimed in claim 9, it is characterised in that the flow regulating unit, be specifically used for:In the centre Unwrap when pouring, the argon gas is switched from the maximum opening and adjusted to the 20%-30% of the maximum opening so that the argon Air pipe is passed through argon gas source with the 20%-30% of the maximum stream flow into the tundish.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710998273.3A CN107671251B (en) | 2017-10-24 | 2017-10-24 | Tundish low oxygen level control method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710998273.3A CN107671251B (en) | 2017-10-24 | 2017-10-24 | Tundish low oxygen level control method and device |
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| CN107671251A true CN107671251A (en) | 2018-02-09 |
| CN107671251B CN107671251B (en) | 2020-05-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113664171A (en) * | 2021-08-24 | 2021-11-19 | 建龙北满特殊钢有限责任公司 | Method for controlling quality of continuous casting head blank |
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| CN107671251B (en) | 2020-05-15 |
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