WO2004082868A1 - 連続鋳造ノズル - Google Patents
連続鋳造ノズル Download PDFInfo
- Publication number
- WO2004082868A1 WO2004082868A1 PCT/JP2004/003438 JP2004003438W WO2004082868A1 WO 2004082868 A1 WO2004082868 A1 WO 2004082868A1 JP 2004003438 W JP2004003438 W JP 2004003438W WO 2004082868 A1 WO2004082868 A1 WO 2004082868A1
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- WO
- WIPO (PCT)
- Prior art keywords
- mass
- nozzle
- clinker
- refractory
- component
- Prior art date
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/06—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on oxide mixtures derived from dolomite
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5463—Particle size distributions
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/72—Products characterised by the absence or the low content of specific components, e.g. alkali metal free alumina ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/72—Products characterised by the absence or the low content of specific components, e.g. alkali metal free alumina ceramics
- C04B2235/721—Carbon content
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/79—Non-stoichiometric products, e.g. perovskites (ABO3) with an A/B-ratio other than 1
Definitions
- the present invention relates to a nozzle for continuous production of steel, and particularly to a continuous production nozzle in which a refractory material containing a dolomite clinker is arranged at a portion in contact with molten steel.
- alumina adheres to the inner hole surface forming a nozzle runner used when pouring from a tundish into a mold. Alumina adhering to this nozzle coalesces to form large inclusions, which are taken into the mold along with the molten steel flow, causing defects in the pieces and deteriorating the quality.
- the countermeasure there is a method of physically preventing adhesion of alumina by blowing argon gas into molten steel from the inner surface of the nozzle.
- argon gas if the blowing amount is too large, bubbles are trapped in the piece and become a pinhole, resulting in a defect. Therefore, the amount of gas blown is limited, and it cannot always be a sufficient measure.
- the refractory material forming the inner bore surface of the nozzle contain a component having an alumina deposition preventing function, such as a C a O, C a O one A 1 2 ⁇ 3 system
- a component having an alumina deposition preventing function such as a C a O, C a O one A 1 2 ⁇ 3 system
- a method of generating a low melt as described above to reduce the amount of adhesion.
- a component having a function of preventing alumina adhesion such as CaO, increases the thermal expansion coefficient of the entire nozzle and makes it easier to crack, and there is a problem of digestion of refractories by CaO. .
- the method of placing the refractory containing CaO in this inner hole is as follows: a method in which the refractory containing CaO is integrally formed at the same time as the forming of the immersion nozzle; a method in which only the nozzle body is formed; In addition, there is known a method of manufacturing an inner hole body separately, and disposing the inner body in a nozzle body inner hole via a mortar or the like.
- a material containing CaO which is a component having an alumina adhesion preventing function lime clinker, dolomite clinker, calcium zirconate and the like are known.
- lime clinker, dolomite clinker, calcium zirconate and the like are known.
- Japanese Unexamined Patent Publication No. Sho 61-53150 discloses that the surface layer of a runner is composed of 20 to 97% by mass of lime cleansing force and 3 to 80% of carbonaceous material.
- a nozzle for producing molten steel in which the outer layer is made of 50 to 95% by mass of alumina and 5 to 50% of carbon.
- This patent document also discloses that a part of the lime clinker can be replaced with dolomite clinker or calcium zirconia clinker containing 20 wt% or more of CaO.
- dolomite clinker or calcium zirconia clinker containing 20 wt% or more of CaO when such a nozzle is applied, there is a problem that in the case of a long-time structure or in a case where the amount of alumina in the molten steel is large, elution due to generation of a low-melting-point material causes an increase in erosion.
- Japanese Patent Application Laid-Open No. 63-132,755 discloses that a coating layer made of a lime material containing 50 to 100% by mass of CaO is formed on the inner wall of a continuous production nozzle. More specifically, a coating layer comprising 80% by mass of dolomite clinker and 20% by mass of magnesia clinker is disclosed. In this case, since dolomite clinker is used as the CaO-containing refractory, there is an advantage that erosion is reduced as compared with the above-mentioned Japanese Patent Application Laid-Open No. Sho 61-53150. In practical use, there is still a problem that it is not enough to meet the needs of reducing the amount of erosion.
- the thickness of the refractory disposed in the inner hole is as small as about 20 mm even if it is 1 mm larger, and the particle size of the raw material used is generally 1 mm or less.
- the average particle size is desirably 44 Lm or less.
- refractory containing the C a 0 of Doromai Tokurinka Chancellor generates a low Torubutsu of C A_ ⁇ one A 1 2 ⁇ 3 system reacts with the alumina coming attached, low melting material is molten steel Since it flows out of the surface of the refractory due to the flow, it has an excellent alumina adhesion prevention function.
- compatibility with corrosion resistance is difficult, and at present it is hardly practically used. Disclosure of the invention
- the present inventors have found that, when dolomite clinker is used as a CaO source as a refractory at least at a portion of the continuous production nozzle that comes into contact with molten steel, CaO in the dolomite clinker adheres during use. 1 2 0 3 the reaction to be consumed as, M g O in Doromai Tokurin force one is concentrated remains in the operational plane, the M g O content of 50% or more of M g O Ritsuchi layer It was newly found that the formation of this layer improves the corrosion resistance.
- the continuous production nozzle of the present invention comprises 5 to 60% by mass of a dolomite clinker having a particle diameter of 1 mm or more, and the remainder comprises a dolomite clinker and / or a magnesia clinker having a particle diameter of less than 1 mm.
- the mass ratio W1 / W2 of the content W1 of the O component and the content W2 of the MgO component is blended so as to be 0.33 to 3.0, and a binder is added and kneaded. It is characterized in that the refractory obtained by forming and heat-treating is arranged at least in a part in contact with molten steel.
- the particle size of the dolomite clinker used is 5 to 1 mm or more.
- the dolomite clinker as in the present invention is used as a main raw material and the purpose is to form a rich layer of MgO, a relatively small diameter of 1 mm or more, which is not often used as the inner body of the immersion nozzle. It is preferable to contain 5 to 60% by mass of a clinker having a large particle size.
- clinkers with a particle size of 1 mm or more must be 5% by mass or more to significantly improve the corrosion resistance.
- a preferred range is 5 to 60% by mass.
- the dolomite clinker used in the present invention is a refractory raw material mainly composed of CaO and MgO, and is a raw material generally used as a raw material for refractory materials such as dolomite bricks.
- a dolomite clinker obtained by heat-treating natural dolomite or a synthetic dolomite clinker prepared by using an artificial material to have an arbitrary composition can be used.
- a material which has been subjected to a surface treatment for preventing digestion for example, a raw material having calcium phosphate formed on the surface can be used.
- dolomite clinker having a particle diameter of less than 1 mm can be used, and magnesia clinker can be used regardless of particle size. it can. Also, both can be used in combination.
- the magnetic cleansing force can be more preferably used in an amount of 5 to 50% by mass, and more preferably 0.5 mm or less, and more preferably 3 to 30% by mass. In refractory tissue, 0. 5 mm or less magnesia clinker particles this is present in the grain boundary, i.e.
- the magnesia clinker one is when to suppress diffusion of A 1 2 ⁇ 3 Conceivable. That is, M G_ ⁇ is to generate a spinel by reaction with A l 2 ⁇ 3, so to suppress the reaction between the trap and moreover C a O a A 1 2 0 3 as a solid, A 1 2 0 3 is Penetration through dolomite clinker grain boundaries can be suppressed. Therefore, it is considered that the dolomite clinker was prevented from falling off until A12 13 adhered to the surface of the dolomite clinker and then a liquid phase was formed on the surface.
- the MgO-rich layer spreads over the working surface, the magnesia clinker present at the grain boundaries became entangled with the MgO particles in the dolomite clinker and a part of the connective tissue By forming the layer, it is possible to reinforce the Mg layer and improve the corrosion resistance.
- the amount of the magnesia clinker having a particle size of 0.5 mm or less is less than 3% by mass, the formation of a continuous MgO-rich layer becomes difficult to be promoted.
- the magnesia clean force with a particle diameter of 0.5 mm or less exceeds 30% by mass, a continuous dense Mg0-rich layer is formed. For this reason, the pores formed in the Mg M rich layer are reduced, and it becomes difficult to supply Ca ⁇ in the continuous production nozzle to the working surface. Further, when the particles are used as coarse particles exceeding 0.5 mm, it is difficult to fill the matrix portion between the particles of the dolomite clinker, so that the above-mentioned effects are not sufficiently obtained.
- magnesia clinker used in the present invention a material generally used as a refractory material can be used, and for example, a sintered magnesia clinker, an electro-fused magnesia clinker, or the like can be used.
- binder used in the present invention an inorganic binder or an organic binder generally used as a refractory can be used, but an organic binder is more preferable.
- the organic binder is used to form carbon pounds, and a thermosetting organic resin is more preferable.
- a phenol resin, a furan resin, or the like can be used. Since carbon bond is excellent in hot strength, its durability is improved when applied to refractories in contact with molten steel, such as bores.
- dolomite clinker may be used as a refractory raw material, or dolomite clinker and magnesium clinker may be combined.
- other raw materials can be used with the expectation of the general effects peculiar to each raw material, as long as they have no adverse effect.
- the refractory to be disposed at the site in contact with the molten steel of the present invention is obtained by adding a binder to a composition containing a refractory raw material, kneading, forming and heat-treating, but containing CaO in the composition.
- the mass ratio W1 / W2 of the amount W1 to the content W2 of the MgO component is preferably from 0.33 to 3.0.
- C a O - be as long as it does not significantly inhibit the production of A 1 0 3 based liquid phase and MgO Ritsuchi layer contains without problems
- the amount is more preferably under the following conditions. That is, the mass ratio Wl / W2 of the content W1 of the CaO component and the content W2 of the MgO component is 0.33 to 3.0, and the content of the Mg0 component is 20% by mass. Not less than 70% by mass and the mass ratio W1 / W3 of the content W1 of the CaO component to the content W3 of the remaining components excluding the CaO component and the MgO component is 2 or more and 30 It is as follows.
- W 1 ZW3 exceeds 30, the activation of CaO in the refractory decreases, the supply of Ca0 through the MgO-rich layer decreases, and alumina Things are more likely to adhere.
- W 1 3 is less than 2, the generation of A 1 2 ⁇ 3 by oxidation of A 1 in the molten steel is promoted, alumina inclusions are likely to adhere to the working surface.
- the use of carbonaceous material for the refractory placed in the area that comes into contact with molten steel can absorb and reduce the thermal expansion strain of the refractory in the area that comes into contact with molten steel, and enhances the stability of the structure be able to.
- the amount of use is preferably 0.1 to 10% by mass on the outside, more preferably 1 to 5% by mass on the outside.
- the carbon component When the content exceeds 10% by mass, the carbon component is oxidized by oxygen in the molten steel, and the dissolution into the molten steel increases, resulting in increased erosion. When the content is less than 0.1% by mass, the above effect of the carbon component is insufficient. .
- the carbonaceous raw material carbon black, and graphite or scaly graphite can be used.
- the thermosetting organic resin as the binder is not included in the carbonaceous material.
- the effect of improving the durability can be obtained when a graphite material such as flaky graphite is not used among the carbonaceous materials. Therefore, when the durability is more important, it is more preferable that the graphite raw material is not used or that the addition amount is 3% by mass or less.
- a method of integrally forming a refractory disposed at least in a portion in contact with molten steel into an inner hole of a continuous production nozzle at the time of molding a method of spraying the inner hole, and a method of injecting the refractory into the inner hole Any of the following methods may be used.
- an inner hole body in which a refractory separately manufactured as an inner hole body is arranged in the inner hole of the continuous structure nozzle is more preferable.
- alumina-carbon materials are generally widely used because of their corrosion resistance and spalling resistance.
- integrally molded, blown or, ⁇ no method, C a O components A 1 2 0 3 and the inner bore of the or crack due connexion nozzle body expansion difference of the bore member or the nozzle body, the reaction As a result, there is a problem that the durability is reduced. For this reason, it is suitable to separately manufacture the inner body and arrange it through a mortar such as MgO or the like or Z or space.
- the expansion allowance of the inner hole can be secured by mortar or the like, so that the nozzle body can be prevented from cracking.
- the reaction can be suppressed, and the durability can be improved.
- a press-molding type and a press-molding type are basically possible. Since the inner hole body has a small thickness, in order to further improve the corrosion resistance, a dense and high-strength pressure-molding type may be used. After molding, heat treatment is performed at an appropriate temperature according to the binder used. For example, when a thermosetting resin is used as the binder, 150 or more is sufficient. Also, the sintering type can be fired at a temperature of 170 ° C. or less.
- the refractory to be disposed at the portion in contact with the molten steel of the present invention has an apparent porosity of 3 to 10% from the viewpoint of corrosion resistance and spoiling resistance. If it is less than 3%, the structure becomes too dense and the spalling resistance decreases, and if it exceeds 10%, the corrosion resistance decreases.
- FIG. 1 show how the dolomite clinker particles in the inner bore placed in the inner bore of the immersion nozzle change.
- Figure 2 shows the structure of the working surface of the bore. The microscopic photograph shown is shown.
- a 1 2 0 3 in the molten steel adheres to ⁇ dynamic surface of the inner hole thereof. Since A 12_Rei_3 adhered to working surface is sufficiently smaller than Doromai Tokurinka one reacts with C aO-in Doromai Tokurinka are absorbed to generate the C AO- A 1 2 Rei_3 compound into dolomite clinker in a car. As shown in Fig. 1a, the dolomite clinker is in a state where Mg ⁇ particles are scattered in the CaO crystal.
- C aO-A 1 2 O 3 reaction layer shown in the figure A containing many A 1 2 03 on the surface of the dolomite clinker is formed.
- the concentration of the more near working surface A 1 2 0 3 has a high state becomes C aO-one A 1 2 0 3 based liquid layer.
- the Ca0 component in the dolomite clinker is continuously dissolved until the saturated concentration composition of Ca0 is reached.
- the working surface of the dolomite clinker will be C a OA 1 2 Rei_3 system liquid layer low-melting and fluidity is improved is formed.
- Mg_ ⁇ particles are coarsening by agglomeration with the movement of the C A_ ⁇ one A 1 2 ⁇ 3 reaction layer is Ri returned Repetitive. Therefore, an MgO-rich layer (B in the figure) is continuously formed on the working surface.
- C a 0- A 1 2 ⁇ 3 anti ⁇ thickness to be formed is understood governed by penetration distance A 1 2 ⁇ 3 in Doromai Tokurinka scratch.
- the liquid phase containing the MgO-rich layer frequently but the concentration of C a O for A 1 2 ⁇ 3 is attached comes to decrease, in a reaction layer which is present on the back of Mg_ ⁇ rich layer
- Ca0 in the dolomite clinker is supplied to the working surface by diffusing through the MgO-rich layer. Therefore the working surface of the de port My Tokurinka so C a 0- A 1 2 0 3 based liquid phase is formed by substantially continuous.
- a 1 2 ⁇ 3 in the molten steel is prevented from adhering to the working surface.
- the MgO-rich layer formed on the working surface causes CaO to move between the MgO particles, thus preventing excessive elution of Ca0 to prevent corrosion on the working surface. Is improved.
- reaction layer is formed in each dolomite clinker particle, but on the operating surface, each particle is integrated to form a continuous reaction layer and spreads over the entire inner hole. It is conceivable that. Therefore, it is important that this reaction layer be stably present for a long time during the production.
- the present invention will be described more specifically.
- Table 1 shows the chemical composition of the dolomite clinker and magnesia clinker used, and Tables 2 and 3 show the mixing ratio of the refractory. Incidentally, there with the other in the chemical ingredients in Table 3 shows the C a 0, M g O, S I_ ⁇ 2, F e 2 0 3, the other components except ⁇ Pi C.
- Ratio of 1mm or more aggregate (mass. / 0) 0 3 5 10 20 30 40 50 60 20 20 70 Chemical composition (mass ./.)
- Examples 1 to 7 investigate the effect of the use of aggregates of 1 mm or more. Compared to Comparative Example 1 where no aggregate of 1 mm or more is used. It can be seen that the erosion rate was reduced and the corrosion resistance was significantly improved.
- Examples 10 to 14 used a magnetic clinker of 0.5 mm or less, but had a lower erosion rate than Example 3 using the same amount of coarse particles. It can be seen that it has been improved.
- Example 4 using the soil of Example 4 and the soil of Comparative Example 1 shown in Table 2, a cylindrical sleeve having a thickness of 10 mm was formed and heat-treated as an inner hole, and the inner sleeve of the immersion nozzle was formed. It was arranged via a magnesia-based mortar. Using these immersion nozzles, 1000 T of aluminum-killed steel was poured into a metal mold to form a slab.
- the continuous production nozzle of the present invention is a nozzle used for continuous production of steel, and specifically includes an immersion nozzle, a long nozzle, a lower nozzle, an upper nozzle, a sliding nozzle plate, an open nozzle, and the like.
- the nozzles can be arranged at locations that come into contact with molten steel.
- the present invention When the present invention is applied to an immersion nozzle, it is most effective to dispose a refractory disposed at a portion in contact with molten steel as an inner hole body in the inner hole of the immersion nozzle.
- Immersion nozzle is different from upper nozzle / sliding nozzle plate etc. Since the refractory is not restrained, when the refractory of the present invention is arranged in the inner hole, there is a problem in that the refractory is weak against a crack due to expansion during use. For this reason, it is most effective to separately manufacture the refractory of the present invention as an inner hole body and arrange it in the inner hole including the discharge port of the immersion nozzle.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Ceramic Products (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005503681A JP4431111B2 (ja) | 2003-03-14 | 2004-03-15 | 連続鋳造ノズル |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-070258 | 2003-03-14 | ||
JP2003070258 | 2003-03-14 | ||
JP2003072436 | 2003-03-17 | ||
JP2003-072436 | 2003-03-17 |
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Publication Number | Publication Date |
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WO2004082868A1 true WO2004082868A1 (ja) | 2004-09-30 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2004/003438 WO2004082868A1 (ja) | 2003-03-14 | 2004-03-15 | 連続鋳造ノズル |
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JP (1) | JP4431111B2 (ja) |
WO (1) | WO2004082868A1 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005087406A1 (ja) | 2004-03-15 | 2005-09-22 | Krosakiharima Corporation | 連続鋳造ノズル |
JP2006239756A (ja) * | 2005-03-04 | 2006-09-14 | Kurosaki Harima Corp | 連続鋳造用ノズルおよび連続鋳造方法 |
JP2006239757A (ja) * | 2005-03-04 | 2006-09-14 | Kurosaki Harima Corp | 連続鋳造用ノズル |
JP2007083283A (ja) * | 2005-09-22 | 2007-04-05 | Kurosaki Harima Corp | 浸漬ノズル |
JP2008055452A (ja) * | 2006-08-30 | 2008-03-13 | Kurosaki Harima Corp | 難付着性連続鋳造用ノズル |
WO2019082740A1 (ja) * | 2017-10-25 | 2019-05-02 | 黒崎播磨株式会社 | 熱間用乾式吹付材及び熱間乾式吹付施工方法 |
CN115246742A (zh) * | 2021-04-28 | 2022-10-28 | 宝山钢铁股份有限公司 | 高氧钢连铸用长水口 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH01278469A (ja) * | 1988-04-28 | 1989-11-08 | Kawasaki Refract Co Ltd | マグネシア−カルシア質耐火物 |
JPH0543343A (ja) * | 1991-08-07 | 1993-02-23 | Kyushu Refract Co Ltd | ドロマイトれんが及びその製造方法並びにそれを用いたタンデイツシユ |
JPH06116015A (ja) * | 1992-10-07 | 1994-04-26 | Nkk Corp | マグネシアドロマイト煉瓦及び精錬炉 |
JPH08145574A (ja) * | 1994-11-21 | 1996-06-07 | Tokyo Yogyo Co Ltd | 焼成マグネシア・ドロマイトれんが |
-
2004
- 2004-03-15 WO PCT/JP2004/003438 patent/WO2004082868A1/ja active Application Filing
- 2004-03-15 JP JP2005503681A patent/JP4431111B2/ja not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH01278469A (ja) * | 1988-04-28 | 1989-11-08 | Kawasaki Refract Co Ltd | マグネシア−カルシア質耐火物 |
JPH0543343A (ja) * | 1991-08-07 | 1993-02-23 | Kyushu Refract Co Ltd | ドロマイトれんが及びその製造方法並びにそれを用いたタンデイツシユ |
JPH06116015A (ja) * | 1992-10-07 | 1994-04-26 | Nkk Corp | マグネシアドロマイト煉瓦及び精錬炉 |
JPH08145574A (ja) * | 1994-11-21 | 1996-06-07 | Tokyo Yogyo Co Ltd | 焼成マグネシア・ドロマイトれんが |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1736258A1 (en) * | 2004-03-15 | 2006-12-27 | Krosakiharima Corporation | Nozzle for use in continuous casting |
EP1736258A4 (en) * | 2004-03-15 | 2007-09-26 | Krosakiharima Corp | TIP FOR CONTINUOUS CASTING |
WO2005087406A1 (ja) | 2004-03-15 | 2005-09-22 | Krosakiharima Corporation | 連続鋳造ノズル |
JP4629461B2 (ja) * | 2005-03-04 | 2011-02-09 | 黒崎播磨株式会社 | 連続鋳造用ノズル |
JP2006239756A (ja) * | 2005-03-04 | 2006-09-14 | Kurosaki Harima Corp | 連続鋳造用ノズルおよび連続鋳造方法 |
JP2006239757A (ja) * | 2005-03-04 | 2006-09-14 | Kurosaki Harima Corp | 連続鋳造用ノズル |
JP4589151B2 (ja) * | 2005-03-04 | 2010-12-01 | 黒崎播磨株式会社 | 連続鋳造用ノズルおよび連続鋳造方法 |
JP2007083283A (ja) * | 2005-09-22 | 2007-04-05 | Kurosaki Harima Corp | 浸漬ノズル |
JP2008055452A (ja) * | 2006-08-30 | 2008-03-13 | Kurosaki Harima Corp | 難付着性連続鋳造用ノズル |
JP4751277B2 (ja) * | 2006-08-30 | 2011-08-17 | 黒崎播磨株式会社 | 難付着性連続鋳造用ノズル |
WO2019082740A1 (ja) * | 2017-10-25 | 2019-05-02 | 黒崎播磨株式会社 | 熱間用乾式吹付材及び熱間乾式吹付施工方法 |
CN115246742A (zh) * | 2021-04-28 | 2022-10-28 | 宝山钢铁股份有限公司 | 高氧钢连铸用长水口 |
CN115246742B (zh) * | 2021-04-28 | 2023-09-12 | 宝山钢铁股份有限公司 | 高氧钢连铸用长水口 |
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