CN201626971U - Device for tundish extra electric field pollution-free deoxidation - Google Patents
Device for tundish extra electric field pollution-free deoxidation Download PDFInfo
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- CN201626971U CN201626971U CN2010201049968U CN201020104996U CN201626971U CN 201626971 U CN201626971 U CN 201626971U CN 2010201049968 U CN2010201049968 U CN 2010201049968U CN 201020104996 U CN201020104996 U CN 201020104996U CN 201626971 U CN201626971 U CN 201626971U
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- tundish
- inclusion
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- molten steel
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Abstract
A device for tundish extra electric field pollution-free deoxidation comprises a tundish which comprises a tundish body and a tundish cover, a long nozzle which is inserted into the tundish body through the tundish cover and positioned on one side of the tundish cover, a turbulence inhibitor which is arranged on the inner bottom of the tundish body and corresponds to the long nozzle, a stopper rod which is inserted into the tundish body through the tundish cover and positioned on the other side of the tundish cover, and a submersed nozzle which is arranged on the inner bottom of the tundish body and corresponds to the stopper rod, and is characterized in that an anode is inserted into covering slag for deoxidation in the tundish body, and molten steel used as cathode is connected with the direct-current power supply through a cathode lead inserted into the molten steel. An extra direct-current power supply applies direct-current pulse electric field to form an electric field between the molten steel and the anode of the covering slag, at the same time, the molten steel is stirred, through controlling the current value and the voltage value of the direct-current power supply, and the component of the covering slag for deoxidation, the conduction direction and speed of oxygen ion in the molten slag system can be controlled, and the mass transfer of dissolved oxygen in the molten steel is increased, thus realizing the goal of the pollution-free deoxidation of molten steel and the purification of molten steel.
Description
Technical field
The utility model belongs to metallurgical refinery practice technical field, particularly the device that is used for tundish extra electric field pollution-free deoxidizing of steel-making continuous casting tundish metallurgy technology and Clean Steel production.
Background technology
Along with the develop rapidly of science and technology, more and more higher to the specification of quality of steel, inclusion is required very strictness, particularly the brittle inclusion in the deoxidation products very easily causes product defects.Reducing even avoiding deoxidation products is to reduce entire oxygen content in the steel content, an important channel of improving product surface and inner quality to the pollution of molten steel.Therefore many workers are devoted to the research of pollution-free deoxidizing method.The extra electric field pollution-free deoxidizing i.e. the new technology of pollution-free deoxidizing outside the stove in smelting process, and its research thinking is mainly reflected in some patent documentations, is the Chinese invention patent of CN1453371A, CN101235430A etc. as publication number.
Tundish is last refractory materials container in the smelting process of steel, makes the middle-chain of STEELMAKING PRODUCTION flow process, and is the linking point that is turned to operate continuously by periodical operation.Tundish is the important step that improves output of steel and quality as the metallurgical reaction container.
Molten steel flows into the process of tundish from ladle, because of with air generation oxygenizement, can improve the oxygen level in the molten steel, and further generate inclusion, as oxide inclusion, molten steel in tundish also easily further increase be mingled with content.The particle of nonmetallic inclusionsin steel is excluded when steel is in liquid state, and prevent that as far as possible molten steel from absorbing the oxygen of air and refractory materials, avoid secondary oxidation, could satisfy the quality requirements of Clean Steel.Therefore, common at present employing the whole bag of tricks is removed the impurity in the molten steel in tundish, comprising making molten steel pass through various barricades, weir or dividing plate in the flow process in tundish.Barricade, weir or dividing plate can be made by the refractory materials that can absorb inclusion particle.Adopt tundish covering flux in addition, this tundish covers slag blanket and both can be incubated, and prevents the molten steel secondary oxidation, can also remove inclusion.
Summary of the invention
The purpose of this utility model is to provide a kind of device that is used for tundish extra electric field pollution-free deoxidizing, and traditional tundish is changed into a collection pollution-free deoxygenation refining and tundish and novel tundish metallurgy device all over the body.When satisfying adiabatic heat-insulation, prevent the molten steel secondary oxidation and absorbing the tundish covering flux conventional func such as non-metallic inclusion of molten steel face come-up, more stress its metallurgical effect, promptly further remove the free oxygen in the molten steel in the tundish, effectively reduce the total oxygen in the tundish molten steel, effectively prevent secondary oxidation of steel in the tundish, alleviate the erosion degree of insulating covering agent, improve the degree of cleaning of molten steel refractory materials, and then improve slab quality, obtain the high-quality Clean Steel.
For achieving the above object, the technical solution of the utility model is,
Insert anode in the deoxidation of inclusion in covering slag, be connected with direct supply by the cathode wire that inserts wherein as the negative electrode molten steel; The sidewall of inclusion or bottom position can be provided with the air blowing whipping appts.Apply the DC pulse electric field by external dc power supply, between molten steel and covering slag anode, form electric field, simultaneously molten steel is stirred in case of necessity, current value and magnitude of voltage by the control direct supply, and the deoxidation composition of covering slag, control conduction orientation and speed and enhancing dissolved oxygen the mass transfer in molten steel of oxonium ion in the slag system, thereby realize the pollution-free deoxidizing of molten steel, the purpose of cleaning molten steel.
Particularly, the device that is used for tundish extra electric field pollution-free deoxidizing of the present utility model includes: tundish comprises inclusion, clad; Long nozzle in clad inserts the tundish inclusion, is positioned at clad one side; The turbulent flow suppressor is provided with the inclusion inner bottom part, and is corresponding with long nozzle; Stopper inserts in the tundish inclusion by clad, is positioned at the clad opposite side; Corresponding with it, the inclusion inner bottom part is provided with submerged nozzle; It is characterized in that, also comprise, insert anode in covering slag, be connected with direct supply by the cathode wire that inserts in the molten steel as the molten steel of negative electrode in the deoxidation of inclusion.
Further, weir that setting can separate middle covering slag in the inclusion in the tundish inclusion and the dam that is positioned at inclusion one side bottom.
Described anode hangs on the weir, or directly is connected with clad, or is fixed near the cylinder-packing of the interior covering slag slag line of inclusion; The electrode disperse is arranged.
Again, described cathode wire is fixed in the weir, or is made in the stopper or is made in the dam or is made in the long nozzle or is fixed in the inclusion in any and the cylinder-packing that molten steel contacts; The cathode wire disperse is arranged.
Described anode is pyroceramic, refractory metal or alloy, graphite, also can be the high temperature cooling electrode; Described cathode wire is a pyroceramic, and refractory metal or alloy also can be the high temperature cooling electrodes.
Described anode and cathode wire are shaped as pole or flat board.
Described anode and negative electrode can be made into dense structure, also can be porous loose structures.
The covering slag on described molten steel surface can be a kind of, also can be two kinds, by the weir two kinds of covering slags is separated;
In addition, deoxidation described in the utility model can be that acid slag can be a basic slag also with covering slag, has satisfactory stability and high oxygen ionic conductivity, and is little to the cylinder-packing erosion of tundish, the ability that good heat-insulating property and absorption are mingled with; Another covering slag can be traditional covering slag.
The utility model also is provided with whipping appts, and this whipping appts is air blowing whipping appts or electromagnetic mixing apparatus; The air blowing whipping appts is arranged on outside the sidewall of inclusion, or is arranged on the bottom position of inclusion, is blown into bubble by perforated brick or porous tracheae.
According to electrochemical principle, in deoxidation process, cathodic reaction takes place at molten metal/slag interface in Sauerstoffatom, makes molten metal/slag interface accumulation positive charge; In slag/anode contact interface generation anodic reaction, make slag/anodic contact interface accumulation negative charge, hinder electric field thereby produce.By extra electric field, thereby overcome the obstruction electric field, oxonium ion is constantly moved in slag, deoxidation process continues, till balance.
Described anode is pyroceramic, refractory metal or alloy, graphite, can be the high temperature cooling electrode also, is shaped as pole or flat board; Described cathode wire is a pyroceramic, and refractory metal or alloy also can be the high temperature cooling electrodes, and it is shaped as pole or flat board; Electrode can be made into dense structure, also can be porous loose structure.
Described anode can hang on the weir, also can directly be connected with clad, can also be fixed near the cylinder-packing of inclusion slag line; The electrode disperse is arranged.
Described cathode wire can be fixed in the weir, can be made in the stopper, can be made in the dam, also can be made in the long nozzle, can also be fixed in the inclusion in any and the cylinder-packing that molten steel contacts; The cathode wire disperse is arranged.
In some tundish, do not have the dam, under the situation on weir, can use yet.Anode and negative electrode then can be arranged on above-mentioned suitable place.The output voltage of described direct supply is the constant voltage power supply of 0.1～50V, and perhaps outward current is the constant current power supply of 0.1～250A, and pulse-repetition is 0～100KHz, and this power supply has short circuit tripping operation control device.
The covering slag on described molten steel surface can be a kind of, also can be two kinds, by the weir two kinds of covering slags is separated; Deoxidation can be that acid slag can be a basic slag also with covering slag, has satisfactory stability and high oxygen ionic conductivity, and is little to the cylinder-packing erosion of tundish, the ability that good heat-insulating property and absorption are mingled with.Another covering slag can be traditional covering slag.
If increase stirring to tundish, can promote the mass transfer of dissolved oxygen in molten steel greatly so, improve deoxidation efficient, stir not necessarily certainly, because some tundish do not have agitating function.Can be to blow to stir when being necessary to take to stir, also can be induction stirring; The gas that the air blowing whipping appts is blown into is rare gas elementes such as nitrogen or argon gas; The position of blowing device also can be arranged on the bottom position of inclusion except the sidewall that is arranged on inclusion; Be blown into micro-bubble by perforated brick or porous tracheae.
Advantage of the present utility model:
1. can reduce oxygen level and inclusion in the molten steel fast and effectively, improve the degree of cleaning of continuously cast bloom;
2. equipment is simple, and is easy to operate, and cost is low;
3. covering slag can be incubated molten steel, prevents the secondary oxidation of molten steel, and absorbs inclusion;
To existing metallurgical industry continuous casting tundish set transform little, required less investment.
Description of drawings
Fig. 1 is the structural representation of the utility model first embodiment;
Fig. 2 is the structural representation according to the utility model second embodiment;
Fig. 3 is the anode arrangement sectional view of the utility model second embodiment;
Fig. 4 is the structural representation according to the utility model the 3rd embodiment;
Fig. 5 is the arrangement of electrodes sectional view of the utility model the 3rd embodiment.
Embodiment
Referring to Fig. 1, the utility model is used for first embodiment of the device of tundish extra electric field pollution-free deoxidizing, and tundish 1 comprises inclusion 101, clad 102; Long nozzle 2 inserts in the tundish inclusion 101 through clad 102, is positioned at clad 102 1 sides; Turbulent flow suppressor 3 is provided with inclusion 101 inner bottom parts, and is corresponding with long nozzle 2; Stopper 4 inserts in the tundish inclusion 101 by clad 102, is positioned at clad 102 opposite sides; Corresponding with it, inclusion 101 inner bottom parts are provided with submerged nozzle 5; Deoxidation in inclusion 101 on the molten steel 6 is with inserting anode 8 in the covering slag 7, be connected with direct supply 10 by the cathode wire 9 that inserts in the molten steel 5 as the molten steel 6 of negative electrode.
Described anode is a cermet electrodes, and oxonium ion generates O on this electrode
2Gas and discharging, the oxygen under the effect of extra electric field in the molten steel constantly enters covering slag and reacts on electrode, and the oxygen in the molten steel is to get rid of with the form of gas, so product can not produce molten steel and pollutes.
The voltage of described direct supply input is 1～5V, and electric current is 150～200A, and frequency is the DC pulse electric field of 0Hz
Described covering slag all is the deoxidation covering slag, adopts the basic slag of the good conductor of oxonium ion.
Under the acting in conjunction of extra electric field, covering slag, the oxygen in the molten steel will constantly enter slag and form gas at anode and discharge, and oxygen is reduced to extremely low-level in molten steel.
Deoxidation speed in molten steel and the slag can be by changing direct supply current value and magnitude of voltage and covering slag become to assign to control.
Referring to Fig. 2, Fig. 3, the utility model is used for the device of tundish extra electric field pollution-free deoxidizing, second embodiment, tundish 1 comprises inclusion 101, clad 102; Long nozzle 2 inserts in the tundish inclusion 101 through clad 102, is positioned at clad 102 1 sides; Turbulent flow suppressor 3 is provided with inclusion 101 inner bottom parts, and is corresponding with long nozzle 2; Stopper 4 inserts in the tundish inclusion 101 by clad 102, is positioned at clad 102 opposite sides; Corresponding with it, inclusion 101 inner bottom parts are provided with submerged nozzle 5; Deoxidation in inclusion 101 on the molten steel 6 is with inserting anode 8 in the covering slag 7, be connected with direct supply 10 by the cathode wire 9 that inserts in the molten steel 5 as the molten steel 6 of negative electrode.
Weir 11 that setting can separate middle covering slag 7 in the inclusion in the tundish inclusion 101 and the dam 12 that is positioned at inclusion 101 1 side bottoms.
Described anode is a Graphite Electrodes, and oxonium ion generates CO gas and discharges on this electrode, and negative electrode is a high temperature alloy; The gas that the air blowing whipping appts is blown into adopts the rare gas element argon gas, is blown into from the bottom.
The voltage of described direct supply input is 0～3V, and electric current is 200～400A, and frequency is the DC pulse electric field of 5Hz.
Described covering slag all is the deoxidation covering slag, adopts the basic slag of the good conductor of oxonium ion.
Under the acting in conjunction of extra electric field, blowing argon gas, covering slag, the oxygen in the molten steel will constantly enter slag and form gas at anode and discharge, and oxygen is reduced to extremely low-level in molten steel.
Deoxidation speed in molten steel and the slag can be by changing direct supply current value and magnitude of voltage and covering slag become to assign to control.
Referring to Fig. 4, Fig. 5, the utility model is used for the device of tundish extra electric field pollution-free deoxidizing, the 3rd embodiment, tundish 1 comprises inclusion 101, clad 102; Long nozzle 2 inserts in the tundish inclusion 101 through clad 102, is positioned at clad 102 1 sides; Turbulent flow suppressor 3 is provided with inclusion 101 inner bottom parts, and is corresponding with long nozzle 2; Stopper 4 inserts in the tundish inclusion 101 by clad 102, is positioned at clad 102 opposite sides; Corresponding with it, inclusion 101 inner bottom parts are provided with submerged nozzle 5; Deoxidation in inclusion 101 on the molten steel 6 is with inserting anode 8 in the covering slag 7, be connected with direct supply 10 by the cathode wire 9 that inserts in the molten steel 5 as the molten steel 6 of negative electrode.
Weir 11 that setting can separate middle covering slag 7 in the inclusion in the tundish inclusion 101 and the dam 12 that is positioned at inclusion 101 1 side bottoms.
Described anode 8 is a Graphite Electrodes, and oxonium ion generates CO gas and discharges on this electrode, and cathode wire 9 is a sintering metal; The gas that air blowing whipping appts 13 is blown into adopts the rare gas element argon gas, is blown into from the bottom.
The voltage of described direct supply input is 0～5V, and electric current is 100～150A, and frequency is the DC pulse electric field of 10kHz.
The acid slag of the good conductor of oxonium ion is adopted in described deoxidation with covering slag.
Under the acting in conjunction of extra electric field, blowing argon gas, covering slag, the oxygen in the molten steel will constantly enter slag and form gas at anode and discharge, and oxygen is reduced to extremely low-level in molten steel.
Deoxidation speed in molten steel and the slag can be by changing direct supply current value and magnitude of voltage and covering slag become to assign to control.
Claims (10)
1. be used for the device of tundish extra electric field pollution-free deoxidizing, include:
Tundish comprises inclusion, clad;
Long nozzle in clad inserts the tundish inclusion, is positioned at clad one side;
The turbulent flow suppressor is provided with the inclusion inner bottom part, and is corresponding with long nozzle;
Stopper inserts in the tundish inclusion by clad, is positioned at the clad opposite side; Corresponding with it, the inclusion inner bottom part is provided with submerged nozzle; It is characterized in that, also comprise,
The deoxidation of molten steel is with inserting anode in the covering slag in inclusion, is connected with direct supply by the cathode wire that inserts in the molten steel as the molten steel of negative electrode.
2. the device that is used for tundish extra electric field pollution-free deoxidizing as claimed in claim 1 is characterized in that: described anode is connected with clad, or is fixed near the cylinder-packing of the interior covering slag slag line of inclusion; The electrode dispersed placement.
3. the device that is used for tundish extra electric field pollution-free deoxidizing as claimed in claim 1 is characterized in that: described cathode wire is made in the stopper or is made in the long nozzle or is fixed in the inclusion in any and the cylinder-packing that molten steel contacts; Cathode wire disperses to arrange.
4. the device that is used for tundish extra electric field pollution-free deoxidizing as claimed in claim 1, it is characterized in that: weir that setting can separate middle covering slag in the inclusion in the described tundish inclusion and the dam that is positioned at inclusion one side bottom, described anode hangs on the weir.
5. the device that is used for tundish extra electric field pollution-free deoxidizing as claimed in claim 4 is characterized in that: described cathode wire is fixed in the weir, or is made in the dam.
6. as claim 1 or the 2 or 3 described devices that are used for tundish extra electric field pollution-free deoxidizing, it is characterized in that: described anode is pyroceramic, refractory metal or alloy, graphite, also can be the high temperature cooling electrode; Described cathode wire is a pyroceramic, and refractory metal or alloy also can be the high temperature cooling electrodes.
7. as claim 1 or the 2 or 3 described devices that are used for tundish extra electric field pollution-free deoxidizing, it is characterized in that: described anode and cathode wire are shaped as pole or flat board.
8. the device that is used for tundish extra electric field pollution-free deoxidizing as claimed in claim 6 is characterized in that: described anode and cathode wire are shaped as pole or flat board.
9. the device that is used for tundish extra electric field pollution-free deoxidizing as claimed in claim 6 is characterized in that: described anode and cathode wire can be made into dense structure, also can be porous loose structures.
10. the device that is used for tundish extra electric field pollution-free deoxidizing as claimed in claim 1 is characterized in that: also be provided with whipping appts, this whipping appts is air blowing whipping appts or electromagnetic mixing apparatus; The air blowing whipping appts is arranged on outside the sidewall of inclusion, or is arranged on the bottom position of inclusion, is blown into bubble by perforated brick or porous tracheae.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201049968U CN201626971U (en) | 2010-01-29 | 2010-01-29 | Device for tundish extra electric field pollution-free deoxidation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201049968U CN201626971U (en) | 2010-01-29 | 2010-01-29 | Device for tundish extra electric field pollution-free deoxidation |
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| CN201626971U true CN201626971U (en) | 2010-11-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744393A (en) * | 2012-07-26 | 2012-10-24 | 莱芜钢铁集团有限公司 | Tundish flow control device for slab casting machine, preparation method thereof and slagging method using tundish flow control device |
| CN105682827A (en) * | 2013-09-27 | 2016-06-15 | 日新制钢株式会社 | Continuous casting method |
| CN111893238A (en) * | 2020-07-06 | 2020-11-06 | 四川省广汉市德盛钢铁有限责任公司 | Production process of corrosion-resistant steel bar |
-
2010
- 2010-01-29 CN CN2010201049968U patent/CN201626971U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744393A (en) * | 2012-07-26 | 2012-10-24 | 莱芜钢铁集团有限公司 | Tundish flow control device for slab casting machine, preparation method thereof and slagging method using tundish flow control device |
| CN105682827A (en) * | 2013-09-27 | 2016-06-15 | 日新制钢株式会社 | Continuous casting method |
| CN105682827B (en) * | 2013-09-27 | 2018-05-04 | 日新制钢株式会社 | Continuous casing |
| CN111893238A (en) * | 2020-07-06 | 2020-11-06 | 四川省广汉市德盛钢铁有限责任公司 | Production process of corrosion-resistant steel bar |
| CN111893238B (en) * | 2020-07-06 | 2021-10-19 | 四川省广汉市德盛钢铁有限责任公司 | Production process of corrosion-resistant steel bar |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20150129 |
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| EXPY | Termination of patent right or utility model |