CN115945679A - Method for preventing immersion type water gap from being blocked by coupling material and electric field - Google Patents
Method for preventing immersion type water gap from being blocked by coupling material and electric field Download PDFInfo
- Publication number
- CN115945679A CN115945679A CN202310052790.7A CN202310052790A CN115945679A CN 115945679 A CN115945679 A CN 115945679A CN 202310052790 A CN202310052790 A CN 202310052790A CN 115945679 A CN115945679 A CN 115945679A
- Authority
- CN
- China
- Prior art keywords
- submerged nozzle
- nozzle
- electric field
- submerged
- alumina
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 28
- 230000005684 electric field Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008878 coupling Effects 0.000 title claims abstract description 10
- 238000010168 coupling process Methods 0.000 title claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 10
- 238000007654 immersion Methods 0.000 title abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 6
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 46
- 239000010959 steel Substances 0.000 claims abstract description 46
- 238000009749 continuous casting Methods 0.000 claims abstract description 15
- 230000024121 nodulation Effects 0.000 claims abstract description 11
- 229910021364 Al-Si alloy Inorganic materials 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims abstract description 3
- 230000001590 oxidative effect Effects 0.000 claims abstract description 3
- 230000009257 reactivity Effects 0.000 claims abstract description 3
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 claims description 23
- 239000000654 additive Substances 0.000 claims description 16
- 230000000996 additive effect Effects 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 14
- 239000003575 carbonaceous material Substances 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 9
- 239000012212 insulator Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 5
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 238000013329 compounding Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 15
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 10
- 239000011819 refractory material Substances 0.000 abstract description 8
- 230000005012 migration Effects 0.000 abstract description 2
- 238000013508 migration Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 4
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007646 directional migration Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention belongs to the field of functional refractory materials for continuous casting, and particularly relates to a method for preventing an immersion nozzle from being blocked by a novel lining material in an electric field coupling mode. The method utilizes the characteristics that zirconia is not wetted with molten steel, has poor reactivity with alumina and is self-sealed with Max phase and Al-Si alloy at high temperature, and simultaneously compounds a zirconia-based lining material in the submerged nozzle based on the principle that positively charged alumina inclusions are far away from the positive electrode under a pulse electric field, and applies a high-frequency pulse electric field during continuous casting to slow down the permeation of oxidizing gases such as CO and SiO in the submerged nozzle to the interface between the submerged nozzle and the molten steel, reduce the reaction between the lining material and the alumina, avoid the migration of alumina inclusions to the wall surface of the submerged nozzle and reduce the nodulation of alumina in the submerged nozzle. The invention solves the defect that the immersed nozzle is prevented from being blocked by adopting a single means at present, and improves the service life of the nozzle and the quality of steel billets.
Description
Technical Field
The invention belongs to the field of functional refractory materials for continuous casting, and particularly relates to a method for preventing a submerged nozzle from being blocked by coupling a material and an electric field.
Background
The submerged nozzle is an important functional refractory material in continuous casting, connects a tundish and a crystallizer, and has important functions of preventing secondary oxidation of molten steel, stabilizing a flow field and the like. In the continuous casting process, inclusions are important factors influencing the quality of a casting blank, but in the continuous casting process of high-quality steel, the inclusions such as alumina, magnesia-alumina spinel, rare earth composite oxide and the like easily react with a submerged nozzle to cause inner hole nodulation blockage and outer wall slag hanging, so that the continuous casting operation is unstable due to the fact that the pulling speed is reduced or the flow field is uneven, and the casting blank quality is seriously influenced by nodulation falling, slag entrapment and the like, even the continuous casting interruption accident is caused by complete blockage, so that the continuous casting process becomes a bottleneck problem for improving the production quality and efficiency of high-quality special steel in China, and needs to be solved urgently. Therefore, a lot of work is done by researchers aiming at the anti-blocking problem of the submerged nozzle, the blocking phenomenon of the nozzle is greatly improved, but the research is still not satisfactory, and the related research is still continued.
Based on the influence rule of fluid mechanics, chemistry and other factors on the material and structure of refractory material and the transmission and adhesion of inclusion particles, the inner wall composite anti-clogging material is developed, for example, the commonly used lining material mainly comprises CaZrO 3 、Al 2 O 3 Spinel, etc. or the like, which is difficult to react with molten steel or react with inclusions to generate low-melting-point substances, reduces alumina clogging, but has poor universality and great relevance of the use effect to the actual operation conditions of a steel mill, and has the main problems that the materials are carbon-bonded materials and have high porosity, and SiO and CO gases in the materials are easy to diffuse to molten steel oxidized at the interface of a refractory material and the molten steel during the use process, so that the nodulation of alumina is accelerated.In addition, the nozzle clogging can be reduced by applying an electric field to the nozzle, and patent ZL201510110081.5 proposes that the outer surface of the nozzle is connected with the ground through a conductive material, so that the inner surface of the nozzle is kept electrically neutral, and the migration of inclusions to the inner surface of the nozzle can be reduced or eliminated; patent ZL 201910205858.4 applies stable forward current on the inner wall of the submerged nozzle, and the applied electric charge and the homogeneity of inclusions limit the sintering and adhering action of the inclusions on the inner wall of the submerged nozzle; in patent CN 202111414173.4, a pulse power supply is arranged in a tundish, the positive pole of the power supply is connected with the top of a stopper rod of the tundish, and the negative pole of the power supply is connected with an iron rod electrode in a crystallizer at the bottom of a water gap, so that the directional migration of nonmetallic inclusions under a pulse electric field is realized; JP2003126945A passes direct current between tundish and submerged nozzle, and the current density is 0.001A/cm 2 -0.3 A / cm 2 (ii) a JP2004243385A uses a refractory material cylinder inserted into a tundish as a cathode, a submerged nozzle as the cathode, and a direct current of 10-300A is introduced; JP2011147940A also uses refractory cylinder inserted into tundish as anode, submerged nozzle as cathode, and 0.0005A/cm 2 -0.02A / cm 2 The direct current of (1) is applied to the submerged nozzle, and the alumina-graphite refractory material in the submerged nozzle contains 50-80 wt% of alumina and 11-40 wt% of carbon as main components, the CaO content is 1-5 wt%, and the ZrO content is 2 The content is less than 10wt%; JP2012055911A and JP2014184491A propose electric field loading mode for one machine multi-strand or one machine one-strand continuous casting machine, by inserting refractory material cylinder in the tundish as anode and immersion nozzle as cathode, applying pulse waveform electric field with current value of 10-300A and cycle of 6-20ms, and alternating positive and negative, and the cycle of immersion nozzle negative in one cycle of pulse waveform is longer than the cycle of immersion nozzle positive; CN2015058944.0 connects the aluminum carbon immersion nozzle with the positive pole of the pulse power supply through a lead, and the negative pole is connected with a stopper or a long nozzle, and the nodulation is reduced by applying low-density pulse current. Although the electric field is applied to obtain certain effect, the problems exist, firstly, the material condition is not considered when the electric field is applied, and the aluminum carbon water gap is adopted due to higher conductivity, and the aluminum carbon material contacts with the molten steelCarbon can be lost, the surface is rough, the disorder degree of molten steel on the surface of a water gap is increased, the nodulation is accelerated, and even the effect of an electric field can be counteracted; secondly, the application mode of the electric field is to be improved, for example, the patents ZL 201910205858.4, CN 2021114173.4 and CN2015058944.0 only can charge the upper part of the submerged nozzle, and the lower part and the outlet part of the submerged nozzle are serious nodulation parts, and the application mode of the electric field causes the current of the parts, so that the electric field does not play the due role; thirdly, alumina inclusions in molten steel can be charged positively in a transient state at high temperature, and JP2004243385A, JP2011147940A, JP2012055911A and JP2014184491A take a submerged nozzle as a cathode, so that the alumina inclusions are easily attracted to migrate to the submerged nozzle, nodulation is accelerated, and the effect of preventing nodulation cannot be achieved; in addition, the applied pulse frequency is low, and the actual effect is poor. Therefore, the current mode of applying the electric field is difficult to achieve a good use effect.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a method for preventing a submerged nozzle from being blocked by coupling a material with an electric field.
The purpose of the invention is realized by adopting the following technical scheme:
a method for preventing the immersion nozzle from being blocked by the coupling of a material and an electric field comprises the steps of firstly preparing the immersion nozzle with a steel binding post and a composite lining; the inner lining material of the submerged nozzle mainly comprises zirconia and an additive, the additive is a mixture of an Al-Zr-C series Max phase and an Al-Si alloy, the content of the additive is 3-8wt%, the reaction of the inner lining material and the alumina is reduced by utilizing the characteristics that the zirconia is not wetted with molten steel and has poor reactivity with the alumina and the characteristics that the Al-Zr-C series Max phase and the Al-Si alloy are self-sealed at high temperature, the permeation of oxidizing gases CO and SiO in the submerged nozzle to the interface of the submerged nozzle and the molten steel is reduced, and the nodulation of the alumina in the submerged nozzle is reduced; a steel shell with the height of 50-80mm is wrapped outside the middle position of the submerged nozzle, and a binding post is arranged on the steel shell; then preparing a zirconium carbon cylinder with the diameter of 50-70mm, and meanwhile, compounding a layer of BN ceramic with the diameter of 10-15mm outside the zirconium carbon cylinder to serve as an insulator; when molten steel is continuously cast, the composite immersion nozzle with the binding post is used as an anode, the zirconium-carbon cylinder compounded with BN ceramic is used as a cathode and is positioned in a crystallizer, the zirconium-carbon part is ensured not to be contacted with the casting powder, 50-100A of high-frequency positive pulse current is applied between the zirconium-carbon material and the nozzle, the frequency is 60-100KHZ, so that an even electric field can be formed at the middle lower part of the immersion nozzle, aluminum oxide inclusion is far away from the wall surface of the immersion nozzle under the action of the pulse electric field, the action effect of the electric field is improved, and the anti-blocking effect is improved.
The invention provides a method for preventing a submerged nozzle from being blocked by coupling a material and an electric field, which solves the problem that the submerged nozzle is prevented from being blocked by adopting a single means at present and provides a new method for preventing the blockage of the material by coupling the electric field; compared with the existing method of singly adopting an electric field or materials to prevent blockage, the method has better anti-blocking effect, and improves the service life of the water gap and the quality of the steel billet.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. molten steel, 2 parts of an integral stopper rod, 3 parts of a tundish, 4 parts of a power supply, 5 parts of a binding post, 6 parts of BN ceramic, 7 parts of a zirconium-carbon cylinder, 8 parts of an inner liner, 9 parts of protective slag, 10 parts of an immersion nozzle and 11 parts of a crystallizer.
Description of the preferred embodiment
The invention is described in detail with reference to the accompanying drawings and specific embodiments:
examples
As shown in FIG. 1, a submerged entry nozzle having a steel terminal and a composite liner was prepared, in which the liner material consisted essentially of zirconia and an additive, which was a mixture of an Al-Zr-C system Max phase and an Al-Si alloy, in an amount of 3 wt%, and a steel shell having a height of 80mm was wrapped around the center of the submerged entry nozzle, and the steel shell had the terminal. A zirconium carbon cylinder with the diameter of 70mm is prepared, and a layer of BN ceramic with the diameter of 15mm is compounded on the outer portion of the cylinder to serve as an insulator. When molten steel is continuously cast, a composite submerged nozzle with a steel binding post is used as an anode, a cylindrical zirconium carbon material is used as a cathode and is placed in a crystallizer, 50A of high-frequency positive pulse current is applied between the zirconium carbon material and the nozzle, the frequency is 60KHZ, and the continuous casting heat is increased from an average furnace of 4.2 to an average furnace of 5.8.
Examples
The submerged nozzle with the steel wiring terminal and the composite lining is prepared, wherein the lining material mainly comprises zirconium oxide and an additive, the additive is a mixture of an Al-Zr-C series Max phase and an Al-Si alloy, the content of the additive is 8wt%, a steel shell with the height of 60mm is wrapped outside the middle position of the submerged nozzle, and the steel shell is provided with the wiring terminal. A zirconium carbon cylinder with the diameter of 60mm is prepared, and a layer of BN ceramic with the diameter of 12mm is compounded outside the cylinder to serve as an insulator. When molten steel is continuously cast, a composite submerged nozzle with a steel binding post is used as an anode, a cylindrical zirconium carbon material is used as a cathode and is placed in a crystallizer, 100A of high-frequency positive pulse current is applied between the zirconium carbon material and the nozzle, the frequency is 100KHZ, and the continuous casting heat is increased from 4.2 furnaces to 6.5 furnaces on average.
Examples
The submerged nozzle with the steel wiring terminal and the composite lining is prepared, wherein the lining material mainly comprises zirconium oxide and an additive, the additive is a mixture of an Al-Zr-C series Max phase and an Al-Si alloy, the content of the additive is 5wt%, a steel shell with the height of 50mm is wrapped outside the middle position of the submerged nozzle, and the steel shell is provided with the wiring terminal. A zirconium carbon cylinder with the diameter of 50mm is prepared, and a layer of BN ceramic with the diameter of 10mm is compounded on the outer portion of the cylinder to serve as an insulator. When molten steel is continuously cast, a composite submerged nozzle with a steel binding post is used as an anode, a cylindrical zirconium carbon material is used as a cathode and is placed in a crystallizer, 100A of high-frequency positive pulse current is applied between the zirconium carbon material and the nozzle, the frequency is 100KHZ, and the continuous casting heat is increased from an average furnace of 4.2 to an average furnace of 6.3.
Examples
The submerged nozzle with the steel binding post and the composite lining is prepared, wherein the lining material mainly comprises zirconium oxide and an additive, the additive is a mixture of an Al-Zr-C series Max phase and an Al-Si alloy, the content of the additive is 5wt%, a steel shell with the height of 70mm is wrapped outside the middle position of the submerged nozzle, and the steel shell is provided with the binding post. A zirconium carbon cylinder with the diameter of 60mm is prepared, and a layer of BN ceramic with the diameter of 10mm is compounded on the outer portion of the cylinder to serve as an insulator. When molten steel is continuously cast, a composite submerged nozzle with a steel binding post is used as an anode, a cylindrical zirconium carbon material is used as a cathode and is placed in a crystallizer, high-frequency positive pulse current of 80A is applied between the zirconium carbon material and the nozzle, the frequency is 80KHZ, and the continuous casting heat is increased from an average furnace of 4.2 to an average furnace of 6.8.
Claims (2)
1. A method for preventing a submerged nozzle from being blocked by coupling a material and an electric field comprises the following steps of firstly preparing the submerged nozzle with a steel binding post and a composite lining; the lining material of the submerged nozzle mainly comprises zirconium oxide and an additive, wherein the additive is a mixture of an Al-Zr-C series Max phase and an Al-Si alloy, the content of the additive is 3-8wt%, the reaction of the lining material and the aluminum oxide is reduced by utilizing the characteristics that the zirconium oxide is not wetted with molten steel and has poor reactivity with the aluminum oxide and the characteristics that the Al-Zr-C series Max phase and the Al-Si alloy are self-sealed at high temperature, the permeation of oxidizing gases CO and SiO in the submerged nozzle to the interface of the submerged nozzle and the molten steel is reduced, and the nodulation of the aluminum oxide in the submerged nozzle is reduced; a steel shell with the height of 50-80mm is wrapped outside the middle position of the submerged nozzle, and a binding post is arranged on the steel shell; then preparing a zirconium carbon cylinder with the diameter of 50-70mm, and simultaneously compounding a layer of BN ceramic with the diameter of 10-15mm on the outer part of the zirconium carbon cylinder to be used as an insulator.
2. The method for preventing the clogging of the submerged nozzle by coupling the material with the electric field as claimed in claim 1, wherein the composite submerged nozzle with the binding post is used as the anode, the zirconium carbon cylinder compounded with the BN ceramic is used as the cathode and is positioned in the crystallizer, and the zirconium carbon part is ensured not to contact the mold flux during the continuous casting of the molten steel; applying high-frequency positive pulse current of 50-100A between the zirconium carbon material and the nozzle, wherein the frequency is 60-100KHZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310052790.7A CN115945679A (en) | 2023-02-03 | 2023-02-03 | Method for preventing immersion type water gap from being blocked by coupling material and electric field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310052790.7A CN115945679A (en) | 2023-02-03 | 2023-02-03 | Method for preventing immersion type water gap from being blocked by coupling material and electric field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115945679A true CN115945679A (en) | 2023-04-11 |
Family
ID=87289222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310052790.7A Pending CN115945679A (en) | 2023-02-03 | 2023-02-03 | Method for preventing immersion type water gap from being blocked by coupling material and electric field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115945679A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116944448A (en) * | 2023-07-18 | 2023-10-27 | 中钢集团洛阳耐火材料研究院有限公司 | Method for inhibiting integral stopper rod nodulation and improving liquid level stability of crystallizer by using external electric field |
| CN117206510A (en) * | 2023-09-12 | 2023-12-12 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preventing integral stopper rod from nodulation |
| CN117226084A (en) * | 2023-09-12 | 2023-12-15 | 中钢集团洛阳耐火材料研究院有限公司 | Method for reducing alumina inclusion in tundish molten steel |
| CN117324608A (en) * | 2023-12-01 | 2024-01-02 | 中钢集团洛阳耐火材料研究院有限公司 | Optimization method of anti-nodulation lining material of submerged nozzle |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2056430A (en) * | 1979-08-18 | 1981-03-18 | Akechi Taikarenga Kk | Immersion Nozzle for Continuous Casting of Molten Steel |
| US4691844A (en) * | 1986-08-08 | 1987-09-08 | Toshiba Ceramics Co., Ltd. | Immersion nozzle for continuous casting |
| KR20100046983A (en) * | 2008-10-28 | 2010-05-07 | 현대제철 주식회사 | Submerged nozzle for continuous casting |
| JP2012143767A (en) * | 2011-01-07 | 2012-08-02 | Sumitomo Metal Ind Ltd | Continuous casting method for zirconium-containing steel |
| JP2014184491A (en) * | 2014-07-07 | 2014-10-02 | Nippon Steel & Sumitomo Metal | CONTINUOUS CASTING METHOD OF Al-KILLED STEEL |
| KR20170062202A (en) * | 2015-11-27 | 2017-06-07 | 주식회사 포스코 | Nozzle |
| CN112658241A (en) * | 2020-12-10 | 2021-04-16 | 东北大学 | Method for preventing decarburization and reaction behavior of rare earth steel nozzle by applying interface electric field |
-
2023
- 2023-02-03 CN CN202310052790.7A patent/CN115945679A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2056430A (en) * | 1979-08-18 | 1981-03-18 | Akechi Taikarenga Kk | Immersion Nozzle for Continuous Casting of Molten Steel |
| US4691844A (en) * | 1986-08-08 | 1987-09-08 | Toshiba Ceramics Co., Ltd. | Immersion nozzle for continuous casting |
| KR20100046983A (en) * | 2008-10-28 | 2010-05-07 | 현대제철 주식회사 | Submerged nozzle for continuous casting |
| JP2012143767A (en) * | 2011-01-07 | 2012-08-02 | Sumitomo Metal Ind Ltd | Continuous casting method for zirconium-containing steel |
| JP2014184491A (en) * | 2014-07-07 | 2014-10-02 | Nippon Steel & Sumitomo Metal | CONTINUOUS CASTING METHOD OF Al-KILLED STEEL |
| KR20170062202A (en) * | 2015-11-27 | 2017-06-07 | 주식회사 포스코 | Nozzle |
| CN112658241A (en) * | 2020-12-10 | 2021-04-16 | 东北大学 | Method for preventing decarburization and reaction behavior of rare earth steel nozzle by applying interface electric field |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116944448A (en) * | 2023-07-18 | 2023-10-27 | 中钢集团洛阳耐火材料研究院有限公司 | Method for inhibiting integral stopper rod nodulation and improving liquid level stability of crystallizer by using external electric field |
| CN117206510A (en) * | 2023-09-12 | 2023-12-12 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preventing integral stopper rod from nodulation |
| CN117226084A (en) * | 2023-09-12 | 2023-12-15 | 中钢集团洛阳耐火材料研究院有限公司 | Method for reducing alumina inclusion in tundish molten steel |
| CN117226084B (en) * | 2023-09-12 | 2024-05-07 | 中钢集团洛阳耐火材料研究院有限公司 | Method for reducing alumina inclusion in tundish molten steel |
| CN117324608A (en) * | 2023-12-01 | 2024-01-02 | 中钢集团洛阳耐火材料研究院有限公司 | Optimization method of anti-nodulation lining material of submerged nozzle |
| CN117324608B (en) * | 2023-12-01 | 2024-02-23 | 中钢集团洛阳耐火材料研究院有限公司 | Optimization method of anti-nodulation lining material of submerged nozzle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115945679A (en) | Method for preventing immersion type water gap from being blocked by coupling material and electric field | |
| US20090183995A1 (en) | Ceramic material for use at elevated temperature | |
| CN115971438A (en) | Control method for reducing peritectic steel liquid level fluctuation | |
| CN112125665A (en) | Preparation process of inner nozzle zirconia ceramic for electric furnace steel ladle, steel ladle and converter steelmaking | |
| CN117206510B (en) | Method for preventing integral stopper rod from nodulation | |
| CN108360023A (en) | A kind of method and device of magnalium complex deoxidization alloying | |
| CN106541123A (en) | A kind of method for reducing aluminum carbonaceous submersed nozzle inwall dross speed | |
| EP1240118B1 (en) | Aluminium-wettable protective coatings for carbon components used in metallurgical processes | |
| CN117358891A (en) | Method for preventing stopper rod from nodulation by using electric pulse | |
| JP4231176B2 (en) | Stopper for metallurgy container and / or upper nozzle | |
| JP4150142B2 (en) | Sliding nozzle of metallurgical container | |
| KR101834419B1 (en) | Casting apparatus and casting method using the same | |
| CN111113636B (en) | Preparation method of tundish turbulence controller for low-cost long-service-life continuous casting of special-shaped blank and tundish turbulence controller prepared by preparation method | |
| CN212645345U (en) | Crucible for induction melting of titanium and titanium alloy | |
| CN115108842A (en) | Long nozzle for high-oxygen steel continuous casting | |
| CN113443918A (en) | Material for ladle bottom vortex block and method for preparing ladle bottom vortex block by using material | |
| CN112573902A (en) | Long-life converter tapping hole | |
| CN109843477B (en) | Nozzle and method of manufacturing the same | |
| CN117226084B (en) | Method for reducing alumina inclusion in tundish molten steel | |
| CN117324613A (en) | Continuous casting anti-blocking submerged nozzle inner hole body material | |
| CN217370447U (en) | Integral stopper rod | |
| CN221064345U (en) | Chute equipment that uses in industrial silicon casting | |
| CN116944448A (en) | Method for inhibiting integral stopper rod nodulation and improving liquid level stability of crystallizer by using external electric field | |
| CN213195600U (en) | Tundish with long service life balance | |
| JP7393638B2 (en) | Continuous steel casting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |