CN102896309B - Monolithic stopper used for continuous casting, and preparation method thereof - Google Patents
Monolithic stopper used for continuous casting, and preparation method thereof Download PDFInfo
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- CN102896309B CN102896309B CN201110215144.5A CN201110215144A CN102896309B CN 102896309 B CN102896309 B CN 102896309B CN 201110215144 A CN201110215144 A CN 201110215144A CN 102896309 B CN102896309 B CN 102896309B
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Abstract
The invention relates to a monolithic stopper used for continuous casting, and a preparation method of the monolithic stopper; the monolithic stopper comprises a stopper head and a stopper body, wherein the stopper head comprises the following components by mass percent: 55-65% of SiC particles with the particle size less than or equal to 1mm, 12-15% of SiC powder with the particle size less than or equal to 325 meshes, 20-25% of graphite powder with the particle size less than or equal to 325 meshes, 2-4% of AlN powder with the particle size less than or equal to 325 meshes, 1-3% of Si powder with the particle size less than or equal to 325 meshes and 4-7% of phenolic resin; and the stopper body comprises the following components by mass percent: 55-65% of aluminum-containing raw material particles with the particle size less than or equal to 1mm, 15-20% of aluminum-containing raw material powder with the particle size less than or equal to 325 meshes, 20-25% of graphite powder with the particle size less than or equal to 325 meshes and 4-7% of phenolic resin. The monolithic stopper used for continuous casting has the characteristics of being high in slag erosion resistance, good in thermal shock stability, and high in strength, having anti-scouring performance and high temperature resistance, and the like, and has the service life more than 12h, thus meeting the multi-furnace continuous casting performance requirement and the product quality requirement.
Description
Technical field
The present invention relates to Refractory For Steelmaking technical field, particularly a kind of integrated stopper rod used for continuous casting and preparation method thereof.
Background technology
Stopper is as one of continuous-casting three-main-product (stopper, long nozzle, submersed nozzle), be installed on tundish, coordinate with built-in type submersed nozzle or tundish upper nozzle, molten steel is controlled from tundish to crystallizer flow, to ensure the stable and continuous casting process in molten steel face in crystallizer, the stable of quality in continuous casting process.
When stopper in use stands thermal shock and the flow control of high-temperature molten steel, the wearing and tearing of sliding surface, need to have good thermal shock resistance, resistance to flaking and corrosion resistance, to ensure security reliability under harsh service condition and higher service life.
On stopper material is selected, consistent with immersion water gap bowl portion material, to ensure that safe handling is for the first element, coordinate tight once there is the caput of stopper and filling pipe end and produce and reveal or occur cracking, disconnected excellent phenomenon, will causing continuous casting, abnormal whole to water even bleed-out, the steel that overflows etc. pernicious be the generation of accident.
The sleeve brick of combined plunger and chock plug adopt different compositions, use after being installed by steel construction control lever (excellent core) combination, stopper head is more easily caused to come off, stopper crackings etc. are abnormal, service life is not long and unstable, is not suitable for the flow control device as long-time continuous cast.
Adopt integral column of sagger effectively can extend the service life of stopper, in use procedure, stopper head is serious by molten steel erosion, and the quality of its anti-erosion, scour resistance is the key factor determining its service life.For improving the service life of integral column of sagger, according to the difference of poured into a mould steel grade, caput can adopt Al
2o
3-C matter, MgO-C matter or ZrO
2-C material, when vacuum is higher, MgO can react with C, causes caput to corrode and accelerates; During molten steel Ca content height, with Al
2o
3reaction, accelerates caput erosion, can not continuous casting for a long time; ZrO
2-C matter stopper is generally applicable to various steel of casting, but cost of material is higher, and expensive, use is restricted.
Summary of the invention
The object of the present invention is to provide a kind of integrated stopper rod used for continuous casting and preparation method thereof, carbofrax material has strong covalent bond binding characteristic, gives it and has good stability; Have simultaneously and be only second to adamantine hardness, give its excellent wearability, there is higher elevated temperature strength, high heat conductance, the low coefficient of expansion and good thermal shock resistance simultaneously, make it become and there is excellent high-temperature behavior, low bulk, wear-resistant, corrosion resistant refractory material.The present invention utilizes carbofrax material resistance to elevated temperatures good, the feature of anti-seismic performance and erosion-resisting characteristics excellence, replace partial oxide wherein, realize effective prolongation in carbide piece stopper service life, thus ensure long-time safety, the stable operation of casting process.
For achieving the above object, technical scheme of the present invention is:
The excellent body of integrated stopper rod used for continuous casting prepared by the present invention adopts Al
2o
3-C material, caput adopts SiC-C material.The primary raw material of caput is carborundum, graphite, aluminium nitride etc., and adopts phenolic resins to be bonding agent.The preparation technology of stopper be the raw material of excellent body and caput is mixed respectively in proportion after, adopt isostatic compaction, base substrate is through 900 DEG C ~ 1000 DEG C obtained carbide piece stoppers of baking.Carbide piece stopper prepared by the present invention has that slag-resistant erosiveness is strong, good thermal shock stability, intensity are high, antiscour, the feature such as high temperature resistant, and service life, more than 12 hours, can meet many stoves continuous casting performance requirement and product quality requirement.
Particularly, a kind of integrated stopper rod used for continuous casting of the present invention, it comprises:
Caput, its composition quality percentage composition is:
Granularity is not more than 1mm SiC particle 55 ~ 65%,
Granularity is not more than 325 order SiC powder 12 ~ 15%,
Granularity is not more than 325 order graphite powders 20 ~ 25%,
Granularity is not more than 325 order AlN powder 2 ~ 4%,
Granularity is not more than 325 order Si powder 1 ~ 3%,
Phenolic resins additional 4 ~ 7%, its addition is the percentage composition by aforementioned caput composition calculation of total;
Rod body, its composition quality percentage composition is:
Granularity is not more than 1mm aluminum-containing raw material particle 55 ~ 65%,
Granularity is not more than 325 order aluminum-containing raw material powder 15 ~ 20%,
Granularity is not more than 325 order graphite powders 20 ~ 25%,
Phenolic resins additional 4 ~ 7%, its addition is the percentage composition by aforementioned excellent body composition calculation of total.
Further, described aluminum-containing raw material is the one in white fused alumina, Brown Alundum, sub-white corundum or alumine.
Described phenolic resins is liquid thermosetting phenolic resins.
The preparation method of a kind of integrated stopper rod used for continuous casting of the present invention; after the raw material of caput and barred body is worked good according to the above ratio; carry out mixing granulation respectively with comminutor; adopt isostatic pressing machine shaping after raw material drying; caput and barred body raw material add mould at twice, suppress base substrate (concentration of carbon monoxide is higher than concentration of oxygen) in 900 DEG C ~ 1000 DEG C reducing atmospheres toasts and obtain carbide piece stopper.
The invention has the beneficial effects as follows:
Stopper caput embodies carborundum and graphitic composition and molten steel not imbibition characteristic completely, there is better anti-thermal shock characteristic simultaneously, the beneficial effect that the present invention has is that the carbide piece stopper of preparation has that slag-resistant erosiveness is strong, good thermal shock stability, intensity are high, antiscour, the feature such as high temperature resistant, service life, more than 12 hours, can meet many stoves continuous casting performance requirement and product quality requirement.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
The raw material that in the present embodiment, caput adopts and mass percentage are for being not more than 1mmSiC particle 55%, be not more than 325 order SiC powder 15%, be not more than 325 order graphite powders 25%, be not more than 325 order AlN powder 4%, be not more than 325 order Si powder 1%, additional phenolic resins 4%; The raw material that its excellent body adopts and mass percentage, for being not more than 1mm white fused alumina particle 55%, being not more than 325 order white alundum powders 20%, being not more than 325 order graphite powders 25%, additional phenolic resins 4%.
The preparation process of integrated stopper rod used for continuous casting is: after being proportioned by the raw material of caput and barred body; carry out mixing granulation respectively with comminutor; adopt isostatic pressing machine shaping after raw material drying; caput and barred body raw material add mould at twice, suppress base substrate toasts and obtains carbide piece stopper in 900 DEG C of reducing atmospheres.
Embodiment 2
The raw material that in the present embodiment, caput adopts and mass percentage are for being not more than 1mmSiC particle 64%, be not more than 325 order SiC powder 12%, be not more than 325 order graphite powders 20%, be not more than 325 order AlN powder 3%, be not more than 325 order Si powder 1%, additional phenolic resins 7%; The raw material that its excellent body adopts and mass percentage, for being not more than 1mm Brown Alundum particle 65%, being not more than 325 order brown alundum powders 15%, being not more than 325 order graphite powders 20%, additional phenolic resins 7%.
Preparation process is: after being proportioned by the raw material of caput and barred body; carry out mixing granulation respectively with comminutor; adopt isostatic pressing machine shaping after raw material drying; caput and barred body raw material add mould at twice, suppress base substrate toasts and obtains carbide piece stopper in 1000 DEG C of reducing atmospheres.
Embodiment 3
The raw material that in the present embodiment, caput adopts and mass percentage are for being not more than 1mmSiC particle 60%, be not more than 325 order SiC powder 12.5%, be not more than 325 order graphite powders 22.5%, be not more than 325 order AlN powder 3%, be not more than 325 order Si powder 2%, additional phenolic resins 5%; The raw material that its excellent body adopts and mass percentage, for being not more than 1mm sub-white corundum particle 60%, being not more than 325 order sub-white corundum powder 17.5%, being not more than 325 order graphite powders 22.5%, additional phenolic resins 5%.
Preparation process is: after being proportioned by the raw material of caput and barred body; carry out mixing granulation respectively with comminutor; adopt isostatic pressing machine shaping after raw material drying; caput and barred body raw material add mould at twice, suppress base substrate toasts and obtains carbide piece stopper in 950 DEG C of reducing atmospheres.
Embodiment 4
The raw material that in the present embodiment, caput adopts and mass percentage are for being not more than 1mmSiC particle 65%, be not more than 325 order SiC powder 12%, be not more than 325 order graphite powders 20%, be not more than 325 order AlN powder 2%, be not more than 325 order Si powder 1%, additional phenolic resins 7%; The raw material that its excellent body adopts and mass percentage, for being not more than 1mm alumine particle 65%, being not more than 325 height of eye bauxite powder 15%, being not more than 325 order graphite powders 20%, additional phenolic resins 7%.
Preparation process is: after being proportioned by the raw material of caput and barred body; carry out mixing granulation respectively with comminutor; adopt isostatic pressing machine shaping after raw material drying; caput and barred body raw material add mould at twice, suppress base substrate toasts and obtains carbide piece stopper in 1000 DEG C of reducing atmospheres.
Embodiment 5
The raw material that in the present embodiment, caput adopts and mass percentage are for being not more than 1mmSiC particle 58%, be not more than 325 order SiC powder 14%, be not more than 325 order graphite powders 23%, be not more than 325 order AlN powder 4%, be not more than 325 order Si powder 1%, additional phenolic resins 6%; The raw material that its excellent body adopts and mass percentage, for being not more than 1mm alumine particle 62%, being not more than 325 height of eye bauxite powder 18%, being not more than 325 order graphite powders 20%, additional phenolic resins 6%.
Preparation process is: after being proportioned by the raw material of caput and barred body; carry out mixing granulation respectively with comminutor; adopt isostatic pressing machine shaping after raw material drying; caput and barred body raw material add mould at twice, suppress base substrate toasts and obtains carbide piece stopper in 950 DEG C of reducing atmospheres.
Embodiment 6
The raw material that in the present embodiment, caput adopts and mass percentage are for being not more than 1mmSiC particle 57%, be not more than 325 order SiC powder 13%, be not more than 325 order graphite powders 24%, be not more than 325 order AlN powder 3%, be not more than 325 order Si powder 3%, additional phenolic resins 7%; The raw material that its excellent body adopts and mass percentage, for being not more than 1mm alumine particle 57%, being not more than 325 height of eye bauxite powder 20%, being not more than 325 order graphite powders 23%, additional phenolic resins 4%.
Preparation process is: after being proportioned by the raw material of caput and barred body; carry out mixing granulation respectively with comminutor; adopt isostatic pressing machine shaping after raw material drying; caput and barred body raw material add mould at twice, suppress base substrate toasts and obtains carbide piece stopper in 980 DEG C of reducing atmospheres.
Table 1 unit: mass percent
Integrated stopper rod used for continuous casting processing technology provided by the present invention is ripe, this integral column of sagger has that slag-resistant erosiveness is strong, good thermal shock stability, intensity are high, antiscour, the feature such as high temperature resistant, long service life, many stoves continuous casting performance requirement and product quality requirement can be met, be used in very much submersed nozzle quick change, continuous casting under stopper rod flow control technology preparation condition is produced, and has higher to promote the use of prospect.
Claims (4)
1. an integrated stopper rod used for continuous casting, it comprises,
Caput, its composition quality percentage composition is:
Granularity is not more than 1mm SiC particle 55 ~ 65%,
Granularity is not more than 325 order SiC powder 12 ~ 15%,
Granularity is not more than 325 order graphite powders 20 ~ 25%,
Granularity is not more than 325 order AlN powder 2 ~ 4%,
Granularity is not more than 325 order Si powder 1 ~ 3%,
Phenolic resins additional 4 ~ 7%, its addition is the percentage composition by aforementioned caput composition calculation of total;
Rod body, its composition quality percentage composition is:
Granularity is not more than 1mm aluminum-containing raw material particle 55 ~ 65%,
Granularity is not more than 325 order aluminum-containing raw material powder 15 ~ 20%,
Granularity is not more than 325 order graphite powders 20 ~ 25%,
Phenolic resins additional 4 ~ 7%, its addition is the percentage composition by aforementioned excellent body composition calculation of total.
2. integrated stopper rod used for continuous casting as claimed in claim 1, it is characterized in that, described aluminum-containing raw material is the one in white fused alumina, Brown Alundum, sub-white corundum or alumine.
3. integrated stopper rod used for continuous casting as claimed in claim 1, it is characterized in that, described phenolic resins is liquid thermosetting phenolic resins.
4. the preparation method of integrated stopper rod used for continuous casting as claimed in claim 1; after the raw material of caput and barred body is worked good according to the above ratio; carry out mixing granulation respectively with comminutor; adopt isostatic pressing machine shaping after raw material drying; caput and barred body raw material add mould at twice; suppress base substrate toasts and obtain carbide piece stopper in 900 DEG C ~ 1000 DEG C reducing atmospheres, in this reducing atmosphere, oxygen concentration is lower than carbonomonoxide concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110215144.5A CN102896309B (en) | 2011-07-29 | 2011-07-29 | Monolithic stopper used for continuous casting, and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110215144.5A CN102896309B (en) | 2011-07-29 | 2011-07-29 | Monolithic stopper used for continuous casting, and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102896309A CN102896309A (en) | 2013-01-30 |
| CN102896309B true CN102896309B (en) | 2015-01-21 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105418094B (en) * | 2015-12-01 | 2018-03-13 | 浙江铁狮高温材料有限公司 | A kind of long-life spinel integral column of sagger |
| CN113999023B (en) * | 2021-09-28 | 2022-11-25 | 赛文斯新型材料(无锡)有限公司 | Preparation method of nano refractory material for stopper rod |
Citations (4)
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|---|---|---|---|---|
| US4059662A (en) * | 1974-11-30 | 1977-11-22 | Nippon Crucible Co., Ltd. | Method of making immersion nozzle and long stopper for continuous casting of steel |
| CN1075307A (en) * | 1992-02-14 | 1993-08-18 | 淄川区洪山特殊耐火材料厂 | Aluminium carbon integrated filler rod |
| CN101429040A (en) * | 2008-11-12 | 2009-05-13 | 淄博大正新材料科技有限公司 | Composite baking-free stopper rod of magnesium aluminate spinel and production process thereof |
| CN102049512A (en) * | 2011-01-18 | 2011-05-11 | 北京利尔高温材料股份有限公司 | Production method of burning-free continuous casting integral composite rod |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0924460A (en) * | 1995-07-13 | 1997-01-28 | Akechi Ceramics Kk | Stopper for casting copper alloy |
| JP2006205218A (en) * | 2005-01-28 | 2006-08-10 | Akechi Ceramics Co Ltd | Stopper for automatic pouring furnace and nozzle for automatic pouring furnace |
-
2011
- 2011-07-29 CN CN201110215144.5A patent/CN102896309B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4059662A (en) * | 1974-11-30 | 1977-11-22 | Nippon Crucible Co., Ltd. | Method of making immersion nozzle and long stopper for continuous casting of steel |
| CN1075307A (en) * | 1992-02-14 | 1993-08-18 | 淄川区洪山特殊耐火材料厂 | Aluminium carbon integrated filler rod |
| CN101429040A (en) * | 2008-11-12 | 2009-05-13 | 淄博大正新材料科技有限公司 | Composite baking-free stopper rod of magnesium aluminate spinel and production process thereof |
| CN102049512A (en) * | 2011-01-18 | 2011-05-11 | 北京利尔高温材料股份有限公司 | Production method of burning-free continuous casting integral composite rod |
Non-Patent Citations (1)
| Title |
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| 碳质耐火材料;孙荣海等;《国外耐火材料》;20051231;第30卷(第06期);第17页右栏1-12行 * |
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