CN114749650A - Parabolic long-life continuous casting immersion nozzle - Google Patents
Parabolic long-life continuous casting immersion nozzle Download PDFInfo
- Publication number
- CN114749650A CN114749650A CN202210493804.4A CN202210493804A CN114749650A CN 114749650 A CN114749650 A CN 114749650A CN 202210493804 A CN202210493804 A CN 202210493804A CN 114749650 A CN114749650 A CN 114749650A
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- China
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- mass percent
- resistant coating
- slag line
- wear
- nozzle
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 31
- 238000007654 immersion Methods 0.000 title claims description 8
- 239000002893 slag Substances 0.000 claims abstract description 37
- 238000000576 coating method Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 abstract description 2
- 239000010959 steel Substances 0.000 description 22
- 229910000831 Steel Inorganic materials 0.000 description 21
- 230000003628 erosive effect Effects 0.000 description 10
- 238000005266 casting Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 230000008018 melting Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/52—Manufacturing or repairing thereof
- B22D41/54—Manufacturing or repairing thereof characterised by the materials used therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention discloses a parabolic long-life continuous casting submerged nozzle which comprises a nozzle body, wherein the top of the nozzle body is a bowl opening part, the lower part of the nozzle body is provided with a slag line part, the nozzle body between the bowl opening part and the slag line part consists of an upper cylindrical body and a lower parabolic body, and the cylindrical body and the parabolic body contain 48-52 mass percent of Al203The inner peripheral walls of the bowl mouth part and the slag line part are respectively provided with a wear-resistant coating, the wear-resistant coating consists of 28-32 mass percent of C + SiC mixture, the bowl mouth part contains 45-50 mass percent of magnesium oxide, the inner peripheral wall of the bowl mouth part is provided with a wear-resistant coating, the wear-resistant coating consists of 15-20 mass percent of C + SiC mixture, and the slag line part contains 80-82 mass percent of ZrO2The inner peripheral wall of the slag line part is provided with a wear-resistant coating which comprises the following components in percentage by mass18-22 of a C + SiC mixture.
Description
Technical Field
The invention relates to a novel structure of a tundish immersion nozzle of a continuous casting machine of a steelmaking enterprise, in particular to a parabolic long-life continuous casting immersion nozzle.
Background
The submerged nozzle for continuous casting mainly has the main functions of preventing secondary oxidation and nitridation of molten steel and splashing of the molten steel, regulating the flowing state and the injection speed of the molten steel, preventing casting powder and other non-metallic inclusions from being involved in the molten steel, playing an important role in promoting floating of the inclusions in the molten steel, and having a decisive influence on the yield of continuous casting of slabs and the quality of casting blanks. The continuous casting submerged nozzle is an aluminum-carbon protective tube formed by static pressure, is used for protecting and pouring steel flow between a continuous casting tundish and a crystallizer, and can prevent molten steel from being oxidized and absorb oxygen, nitrogen and the like from ambient air.
The using conditions and performance requirements of the submerged nozzle for continuous casting are as follows: 1. the spout walls must be thin. 2. The submerged nozzle has extremely excellent thermal shock resistance and better thermal shock fracture resistance. 3. During casting, the flow velocity of molten steel is high, and the mechanical impact force on the position and the bottom of a convection steel opening is large. The submerged nozzle is required to have higher high-temperature strength so as to ensure the service performance of the nozzle at high temperature. 4. The high molten steel flow speed also aggravates the scouring and erosion action on the inner wall of the submerged nozzle. The submerged entry nozzle must have good resistance to molten steel erosion. 5. The continuous casting crystallizer casting powder has the characteristics of low melting point, low viscosity and high melting speed, so that liquid slag can easily permeate into air holes of the submerged nozzle, the erosion inside the nozzle is accelerated, and the wall of the nozzle is very thin. Therefore, the slag line portion of the submerged nozzle is required to have excellent erosion resistance against molten steel and slag.
The main problems of the traditional submerged nozzle are as follows: at present, the inner wall of a continuous casting submerged nozzle is in a straight-up and straight-down cylindrical shape, the erosion resistance of molten steel and molten slag at a slag line part is poor, and impurities are easily accumulated on the inner wall of the nozzle in the casting process, so that the flow blockage phenomenon of the nozzle is caused, and the continuous casting cannot be smoothly carried out.
Disclosure of Invention
The invention aims to provide a parabolic long-life continuous casting submerged nozzle, which can prevent impurities from being accumulated on the inner wall of the nozzle in the casting process, improve the erosion resistance of molten steel and molten slag at a slag line part, ensure the continuous casting furnace number of a continuous casting machine, improve the quality of a casting blank, save manpower and material resources, improve the working environment of workers, ensure the continuous casting of the continuous casting machine, effectively ensure the product quality of the continuous casting blank, reduce the consumption of manpower and material resources and improve the working environment of the workers.
The invention adopts the technical scheme that the parabolic long-life continuous casting submerged nozzle comprises a nozzle body, wherein the top of the nozzle body is a bowl opening part, the lower part of the nozzle body is provided with a slag line part, the nozzle body between the bowl opening part and the slag line part consists of an upper cylindrical body and a lower parabolic body, the inner peripheral wall of the cylindrical body is cylindrical, and a parabola is shapedThe curve of the inner wall of the linear body is a parabola; the cylinder body and the parabola-shaped body contain Al with the mass percentage of 48-52203The inner peripheral walls of the two are respectively provided with a middle wear-resistant coating, the middle wear-resistant coating consists of 28-32 mass percent of C + SiC mixture, the bowl mouth part contains 45-50 mass percent of magnesium oxide, the inner peripheral wall of the bowl mouth part is provided with an upper wear-resistant coating, the upper wear-resistant coating consists of 15-20 mass percent of C + SiC mixture, and the slag line part contains 80-82 mass percent of ZrO2And the inner peripheral wall of the slag line part is provided with a lower wear-resistant coating which consists of 18-22 mass percent of C + SiC mixture.
The service life of a submerged entry nozzle for continuous casting depends on the erosion rate of the slag line portion thereof, which in turn depends on the properties of the mold flux used. In the continuous casting process, the casting powder has low melting point, low viscosity and high melting speed, which has great permeability to the submerged nozzle, and therefore, the erosion resistance of the casting powder, especially the slag line part, must be improved. In addition, at the slag line part, due to the up-and-down movement of the crystallizer during vibration, molten steel and protective slag are alternately contacted with the slag line part of the submerged nozzle, carbon in the material is oxidized under the action of the molten steel, aggregate in the material is corroded or falls off and runs off under the action of molten slag, and the melting loss of the slag line part of the submerged nozzle is aggravated.
The main body of the parabolic continuous casting submerged nozzle of the invention selects high-quality corundum as the main material, so that the nozzle has excellent erosion resistance and thermal shock resistance. The slag line part of the water gap is mainly made of zirconium dioxide, nitride, sialon and other materials with high stability.
In order to prolong the service life, the invention uses ZrO at the slag line part2 The content is increased to 80% or more.
In order to improve the capability of resisting erosion of the slag line part of the submerged nozzle, the slag line part is compounded withLayer Zr02Refractory material of C type for preventing precipitates (e.g. Al) in molten steel203、TiO2) The submerged nozzle with a parabolic shape can effectively reduce Al when the submerged nozzle is deposited on the inner wall of the nozzle to block the nozzle203Deposition at the nozzle.
The invention has the following effects: 1. the submerged nozzle adopts a parabola shape, so that a protective film can be formed between the inner wall of the nozzle and the molten steel, and the deposition of high-melting-point oxides in the molten steel on the inner wall of the nozzle can be prevented, so that the inner channel of the nozzle can be prevented from being blocked, and the service life of the nozzle can be prolonged. 2. The parabola type immersion nozzle of novel design has reduced the impact of molten steel to immersion nozzle bottom, and mouth of a river life improves, can reduction in production cost, and immersion nozzle replacement volume reduces. 3. The novel nozzle has small molten steel impact in the pouring process, and the liquid level of the crystallizer is stable, thereby being beneficial to continuous casting operation. 3. The submerged nozzle has the advantages that the service life is prolonged, and the labor intensity of personnel is reduced. 4. The refractory material use cost is reduced, the continuous casting production cost is reduced, and the cost can be reduced by about 30 percent compared with the traditional submerged nozzle. The invention is suitable for the same type continuous casting machine, the continuous casting machine uses the submerged nozzle with the parabola shape, has the functions of resisting the corrosion of molten steel and slag and scouring, improves the operation stability, can improve the service life of the tundish, improves the operation rate of the continuous casting machine and reduces the production cost of the continuous casting machine.
Drawings
Fig. 1 is a schematic front view of a cross-sectional structure according to the present invention.
Detailed Description
A parabolic long-life continuous casting submerged nozzle is shown in figure 1 and comprises a nozzle body, wherein the top of the nozzle body is a bowl opening part 1, the lower part of the nozzle body is provided with a slag line part 4, the nozzle body between the bowl opening part 1 and the slag line part 4 consists of an upper cylinder body 2 and a lower parabolic body 3, the inner peripheral wall of the cylinder body 2 is cylindrical, and the curve of the inner wall of the parabolic body 3 is parabolic; the cylindrical body 2 and the parabolic body 3 contain Al with the mass percentage of 48-52203The inner peripheral walls of the bowl mouth part 1 and the slag line part are respectively provided with a middle wear-resistant coating, the wear-resistant coatings consist of 28-32 mass percent of C + SiC mixture, the bowl mouth part 1 contains 45-50 mass percent of magnesium oxide, the inner peripheral wall of the bowl mouth part 1 is provided with an upper wear-resistant coating, the upper wear-resistant coating consists of 15-20 mass percent of C + SiC mixture, and the slag line part contains 80-82 mass percent of ZrO2And the inner peripheral wall of the slag line part is provided with a lower wear-resistant coating which consists of 18-22 mass percent of C + SiC mixture.
Claims (1)
1. The utility model provides a parabola type long-life continuous casting immersion nozzle, includes mouth of a river body, and the top of mouth of a river body has slag line position, its characterized in that for the lower part of bowl mouth position, mouth of a river body: the water gap body between the bowl opening part and the slag line part consists of an upper cylindrical body and a lower parabolic body, the inner peripheral wall of the cylindrical body is cylindrical, and the curve of the inner wall of the parabolic body is a parabola; the cylinder body and the parabola-shaped body contain Al with the mass percentage of 48-52203The inner peripheral walls of the two are respectively provided with a middle wear-resistant coating, the middle wear-resistant coating consists of 28-32 mass percent of C + SiC mixture, the bowl mouth part contains 45-50 mass percent of magnesium oxide, the inner peripheral wall of the bowl mouth part is provided with an upper wear-resistant coating, the upper wear-resistant coating consists of 15-20 mass percent of C + SiC mixture, and the slag line part contains 80-82 mass percent of ZrO2And the inner peripheral wall of the slag line part is provided with a lower wear-resistant coating which consists of 18-22 mass percent of C + SiC mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210493804.4A CN114749650A (en) | 2022-05-08 | 2022-05-08 | Parabolic long-life continuous casting immersion nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210493804.4A CN114749650A (en) | 2022-05-08 | 2022-05-08 | Parabolic long-life continuous casting immersion nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114749650A true CN114749650A (en) | 2022-07-15 |
Family
ID=82334329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210493804.4A Pending CN114749650A (en) | 2022-05-08 | 2022-05-08 | Parabolic long-life continuous casting immersion nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114749650A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1244912A (en) * | 1997-04-02 | 2000-02-16 | 北美耐火公司 | Co-moulding method for refractory material for producing non-baked or non-coked refractory material |
| FR2845626A1 (en) * | 2002-10-14 | 2004-04-16 | Rotelec Sa | Control of the configuration of liquid metal movement in a continuous casting mould by the use of sliding magnetic field to induce a permanent double loop movement configuration |
| US20130334263A1 (en) * | 2011-12-01 | 2013-12-19 | Krosakiharima Corporation | Refractory material and casting nozzle |
| CN203459651U (en) * | 2013-08-13 | 2014-03-05 | 宝山钢铁股份有限公司 | Submersed nozzle with flow control vanes |
| JP2015136713A (en) * | 2014-01-22 | 2015-07-30 | 品川リフラクトリーズ株式会社 | Immersion nozzle of continuous casting apparatus |
| CN108290211A (en) * | 2015-12-01 | 2018-07-17 | 里弗雷克特里知识产权两合公司 | Sliding closure member on the spout of metallurgical tank |
| CN110695349A (en) * | 2019-11-21 | 2020-01-17 | 辽宁科技大学 | CSP thin slab continuous casting high-pulling-speed submerged nozzle and manufacturing method thereof |
| CN112157231A (en) * | 2020-09-16 | 2021-01-01 | 东北大学 | Thin strip continuous casting water distribution outlet device |
-
2022
- 2022-05-08 CN CN202210493804.4A patent/CN114749650A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1244912A (en) * | 1997-04-02 | 2000-02-16 | 北美耐火公司 | Co-moulding method for refractory material for producing non-baked or non-coked refractory material |
| FR2845626A1 (en) * | 2002-10-14 | 2004-04-16 | Rotelec Sa | Control of the configuration of liquid metal movement in a continuous casting mould by the use of sliding magnetic field to induce a permanent double loop movement configuration |
| US20130334263A1 (en) * | 2011-12-01 | 2013-12-19 | Krosakiharima Corporation | Refractory material and casting nozzle |
| CN203459651U (en) * | 2013-08-13 | 2014-03-05 | 宝山钢铁股份有限公司 | Submersed nozzle with flow control vanes |
| JP2015136713A (en) * | 2014-01-22 | 2015-07-30 | 品川リフラクトリーズ株式会社 | Immersion nozzle of continuous casting apparatus |
| CN108290211A (en) * | 2015-12-01 | 2018-07-17 | 里弗雷克特里知识产权两合公司 | Sliding closure member on the spout of metallurgical tank |
| CN110695349A (en) * | 2019-11-21 | 2020-01-17 | 辽宁科技大学 | CSP thin slab continuous casting high-pulling-speed submerged nozzle and manufacturing method thereof |
| CN112157231A (en) * | 2020-09-16 | 2021-01-01 | 东北大学 | Thin strip continuous casting water distribution outlet device |
Non-Patent Citations (2)
| Title |
|---|
| 林育炼: "耐火材料与洁净钢生产技术", vol. 1, 30 April 2012, 冶金工业出版社, pages: 415 * |
| 郝娴等: "浸入式水口堵塞机理及防堵措施", 材料导报, vol. 35, no. 1, 25 May 2021 (2021-05-25), pages 489 - 494 * |
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