CN115815581A - Magnesium-carbon tundish nozzle for cord steel and preparation method thereof - Google Patents
Magnesium-carbon tundish nozzle for cord steel and preparation method thereof Download PDFInfo
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- CN115815581A CN115815581A CN202211670308.8A CN202211670308A CN115815581A CN 115815581 A CN115815581 A CN 115815581A CN 202211670308 A CN202211670308 A CN 202211670308A CN 115815581 A CN115815581 A CN 115815581A
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- magnesia
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- tundish nozzle
- magnesium
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- RWDBMHZWXLUGIB-UHFFFAOYSA-N [C].[Mg] Chemical compound [C].[Mg] RWDBMHZWXLUGIB-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 43
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000002131 composite material Substances 0.000 claims abstract description 25
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 25
- 239000010439 graphite Substances 0.000 claims abstract description 25
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000005350 fused silica glass Substances 0.000 claims abstract description 22
- 239000005011 phenolic resin Substances 0.000 claims abstract description 22
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 14
- 230000000996 additive effect Effects 0.000 claims description 10
- 238000000462 isostatic pressing Methods 0.000 claims description 8
- 230000001590 oxidative effect Effects 0.000 claims description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052580 B4C Inorganic materials 0.000 claims description 6
- 239000007767 bonding agent Substances 0.000 claims description 6
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 229910052582 BN Inorganic materials 0.000 claims description 5
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 5
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 5
- 229910052681 coesite Inorganic materials 0.000 claims description 3
- 229910052906 cristobalite Inorganic materials 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 229910052682 stishovite Inorganic materials 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229910052905 tridymite Inorganic materials 0.000 claims description 3
- 229910001337 iron nitride Inorganic materials 0.000 claims description 2
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 21
- 239000012535 impurity Substances 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000003575 carbonaceous material Substances 0.000 abstract description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract description 3
- 239000011819 refractory material Substances 0.000 abstract description 3
- 229910052726 zirconium Inorganic materials 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 238000009749 continuous casting Methods 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract description 2
- 230000008646 thermal stress Effects 0.000 abstract 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 16
- 238000005336 cracking Methods 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000011863 silicon-based powder Substances 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 238000004880 explosion Methods 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 3
- 150000004767 nitrides Chemical class 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- ZOXJGFHDIHLPTG-OUBTZVSYSA-N boron-12 Chemical compound [12B] ZOXJGFHDIHLPTG-OUBTZVSYSA-N 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Images
Classifications
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- 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
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention provides a magnesia-carbon tundish nozzle for cord steel and a preparation method thereof, belonging to the field of continuous casting functional refractory materials, wherein the body of the magnesia-carbon tundish nozzle is made of magnesia-carbon materials, the bowl part is made of magnesia-carbon materials, a layer of magnesia-carbon lining is compounded in an inner hole of the body, and the main raw materials of the tundish nozzle body are 45-70% of fused magnesia or sintered magnesia, 5-20% of fused quartz and 20-30% of graphite, and 1-5% of additives and 10-15% of phenolic resin are added; the main raw materials of the lining of the tundish nozzle are 45-70% of fused magnesia or sintered magnesia, 15-45% of fused quartz, 2-5% of graphite, 2-7% of additives and 8-12% of phenolic resin; according to the invention, the magnesium-carbon material is used on the tundish nozzle body, the composite magnesium-carbon material is also used on the inner liner, and the gradient composite principle is adopted, so that the thermal stress can be alleviated, the thermal shock resistance stability of the material is improved, the tundish nozzle is applied to the production of the cord steel, the introduction of aluminum or zirconium impurities into molten steel of the traditional tundish nozzle can be avoided, and the yield and the quality of the molten steel of the cord steel can be greatly improved.
Description
Technical Field
The invention relates to the technical field of continuous casting functional refractory materials, in particular to a magnesium-carbon tundish nozzle for cord steel and a preparation method thereof.
Background
In the metallurgical industry, wires for steel cords are known as tip products in wires, and the production difficulty is large. During the cord steel process, a 5.5mm filament is drawn to a unit diameter of 0.15mm, extending over 1000 times in length, and is subjected to a series of deformations, such as twisting, stretching and bending, in a subsequent double twist process. Therefore, the steel for the cord steel has quite high requirements on the purity of the steel, the size and the form of inclusions, the quality of the surface of a wire rod and the like, and is one of the steel types with the highest production difficulty and quality requirements in wire rod products.
The biggest problem in producing the cord steel is the deep drawing or the crimp rupture. In the process of developing the cord steel, the broken wire fracture surface is analyzed, and the existence of inclusions is found to be an important reason for the broken wire of the cord steel. Analysis of the inclusion composition revealed that inclusions causing fracture and breakage during working were mainly hard a12O 3-and ZrO 2-type inclusions that were hard to elongate and break during hot rolling and cold working. The sources of A12O3 and ZrO2 can be largely divided into two cases of crystallization from molten steel and introduction of refractory. Therefore, the appropriate refractory material is designed and selected in a targeted manner in the smelting of the cord steel, and the cord steel processing disconnection caused by inclusion is avoided. The traditional aluminum-carbon tundish nozzle or zirconium tundish nozzle is adopted for the tundish nozzle of the existing casting cord steel, the two materials inevitably cause A12O3 and ZrO2 inclusions in molten steel, and in order to solve the problem that the A12O3 and ZrO2 inclusions are mixed into the molten steel in the process of casting the cord steel, the cord steel with higher cleanliness and higher quality is obtained.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a magnesium-carbon tundish nozzle for cord steel and a preparation method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a composite tundish nozzle for cord steel, which comprises a body, an inner liner and a bowl part, wherein the body, the inner liner and the bowl part are all made of magnesium-carbon composite materials.
Further, the body comprises the following raw materials in proportion: 45-70% of fused magnesia or sintered magnesia, 5-20% of fused quartz, 20-30% of graphite, 1-6% of additive and 10-15% of phenolic resin; the lining comprises the following raw materials in proportion: 45-70% of fused magnesia or sintered magnesia, 15-45% of fused quartz, 2-5% of graphite, 2-7% of an additive and 8-12% of phenolic resin.
Further, the carbon content in the graphite is more than 90%.
Furthermore, the additive is one or more of metal silicon powder, silicon carbide powder, boron carbide, silicon nitride, ferrosilicon nitride and boron nitride.
Furthermore, in the chemical components of the fused magnesia or the sintered magnesia, the content of MgO is more than 90 percent, and the content of SiO2 is less than or equal to 10 percent.
Further, the thickness of the magnesium-carbon composite material is 4-8mm.
The invention also provides a preparation method of the composite tundish nozzle for the cord steel, which comprises the following steps:
(1) The method comprises the following steps of (1) preparing a body pug by using fused magnesia or sintered magnesia, fused quartz and graphite as main raw materials, adding a proper amount of additives and phenolic resin as a bonding agent, and granulating and drying;
(2) The magnesia-carbon lining mud is prepared by adopting fused magnesia or sintered magnesia and fused quartz as main raw materials, adding a proper amount of additive and crystalline flake graphite, adopting phenolic resin as a bonding agent, granulating and drying;
(3) The magnesium carbon body, the magnesium carbon lining pug and the pug of the bowl part of the tundish nozzle are compounded, and are sintered at the temperature of 900-1100 ℃ in a non-oxidizing atmosphere after being formed by isostatic pressing, so that the required composite tundish nozzle can be prepared.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the magnesium-carbon material is used on the tundish nozzle body, the low-carbon magnesium-carbon material is compounded on the inner liner, the thermal shock resistance stability of the material is improved by adopting a gradient compounding principle, the produced pure magnesium-carbon tundish nozzle is applied to the production of the cord steel, the phenomenon that aluminum or zirconium impurities are introduced into molten steel in the traditional tundish nozzle and the produced cord steel billet is easy to break in the wire drawing process can be avoided, and the yield of the cord steel and the quality of the molten steel can be greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
Wherein: 1. a body; 2. a liner; 3. a bowl portion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The invention is further illustrated with reference to the accompanying drawings and examples:
a composite tundish nozzle for cord steel comprises a body 1, a lining 2 and a bowl part 3, wherein the body, the lining and the bowl part are all made of magnesium-carbon composite materials; and the thickness of the magnesium-carbon composite material is 4-8mm.
The preparation method comprises the following steps:
1. the method comprises the following steps of (1) taking fused magnesia (45-70%) or sintered magnesia (45-70%), fused quartz (5-20%) and graphite (20-30%) as main raw materials, adding a proper amount of additive (1-6%), taking phenolic resin (10-15%) as a bonding agent, and granulating and drying to prepare a body pug;
2. the magnesia-carbon lining mud is prepared by adopting fused magnesia (45-70 percent) or sintered magnesia (45-70 percent) and fused quartz (15-45 percent) as main raw materials, adding a proper amount of additives (2-7 percent) and crystalline flake graphite (2-5 percent) and adopting phenolic resin (8-12 percent) as a bonding agent, and granulating and drying;
3. the magnesium carbon body, the magnesium carbon lining pug and the pug of the bowl part of the tundish nozzle are compounded, and are sintered at the temperature of 900-1100 ℃ in a non-oxidizing atmosphere after being formed by isostatic pressing, so that the required composite tundish nozzle can be prepared.
Wherein the carbon content in the graphite is more than 90%.
Wherein, the additive is one or more of metal silicon powder, silicon carbide powder, boron carbide, silicon nitride, silicon iron nitride and boron nitride.
Wherein, the chemical components of the fused magnesia or the sintered magnesia comprise MgO with the content more than 90 percent and SiO2 with the content less than or equal to 10 percent.
Example 1
(1) Raw material ratio
The body comprises the following materials in percentage by weight: 70% of fused magnesia, 20% of graphite, 5% of fused quartz, 2% of metal silicon powder, 3% of silicon carbide powder and 15% of added phenolic resin.
The lining comprises the following materials in percentage by weight: 70% of fused magnesia, 2% of graphite, 25% of fused quartz, 3% of metal silicon powder and 15% of additional phenolic resin.
(2) Production of finished product
The body raw material and the lining raw material are respectively granulated and dried to be compounded with the bowl part, and are subjected to isostatic pressing, and then are fired into the integral composite tundish nozzle at 900 ℃ in a steel plant A in a non-oxidizing atmosphere by using a 28 furnace.
The performance of the composite tundish nozzle prepared in example 1 was measured, and the results were as follows:
| number of furnaces | Duration of use | h | Burst condition | Condition of impurities |
| 28 | 17 | Without cracking | No impurity |
| 28 | 20 | Without cracking | No impurity |
And (4) conclusion: when the furnace is used in a 28-furnace in A steel works, the phenomena of explosion, cracking and the like do not occur in the using process, and alumina and zirconia are not included in molten steel.
Example 2
(1) Raw material ratio
The body comprises the following materials in percentage by weight: 55% of fused magnesia, 20% of graphite, 20% of fused quartz, 3% of metal silicon powder, 2% of silicon carbide powder and 15% of added phenolic resin.
The lining comprises the following materials in percentage by weight: 45% of fused magnesia, 5% of graphite, 45% of fused quartz, 5% of silicon carbide powder and 12% of added phenolic resin.
(2) Production of finished product
The body material and the lining material are respectively granulated, dried and compounded with the bowl part, and are subjected to isostatic pressing, and then are fired into the integral composite tundish nozzle at 900 ℃ in a B steel plant by using a 32 furnace in a non-oxidizing atmosphere.
The performance of the composite tundish nozzle prepared in example 2 was measured, and the results were as follows:
| number of furnaces | Duration of use | h | Burst condition | Condition of impurities |
| 32 | 20 | Without cracking | No impurity |
| 32 | 22 | Without cracking | No impurity |
And (4) conclusion: when the furnace is used in a 32-furnace B steel mill, the phenomena of explosion cracking and the like do not occur in the using process, and alumina and zirconia are not included in molten steel.
Example 3
The body comprises the following materials in percentage by weight: 60% of fused magnesia, 25% of graphite, 10% of fused quartz, 2% of silicon carbide powder, 3% of silicon nitride and 15% of added phenolic resin.
The lining comprises the following materials in percentage by weight: 55% of fused magnesia, 3% of graphite, 37% of fused quartz, 1% of silicon carbide powder, 4% of silicon nitride and 11% of added phenolic resin.
(2) Production of finished product
The body material and the lining material are respectively granulated, dried and compounded with the bowl part, and are subjected to isostatic pressing, and then are fired into the integral composite tundish nozzle at the temperature of 900 ℃ in a C steel plant by using a 28 furnace in a non-oxidizing atmosphere.
The performance of the composite tundish nozzle prepared in example 3 was measured, and the results were as follows:
| number of furnaces | Duration of use | h | Burst condition | Condition of impurities |
| 45 | 30 | No cracking | No impurity |
| 45 | 36 | Without cracking | No impurity |
And (4) conclusion: when the steel is used in a 45-furnace in a C steel mill, the phenomena of explosion cracking and the like do not occur in the using process, and no alumina and zirconia are mixed in the molten steel.
Example 4
The body comprises the following materials in percentage by weight: 56% of fused magnesia, 22% of graphite, 18% of fused quartz, 1% of boron carbide, 3% of ferrosilicon nitride and 13% of added phenolic resin.
The lining comprises the following materials in percentage by weight: 50% of fused magnesia, 5% of graphite, 41% of fused quartz, 3% of boron nitride, 1% of boron carbide and 12% of added phenolic resin.
The body material and the lining material are respectively granulated, dried and compounded with the bowl part, and are subjected to isostatic pressing, and then are fired into the integral composite tundish nozzle at the temperature of 900 ℃ in a D steel factory by using a 20 furnace in a non-oxidizing atmosphere.
The performance of the composite tundish nozzle prepared in example 4 was measured, and the results were as follows:
| number of furnaces | Duration of use | h | Burst condition | Condition of impurities |
| 20 | 15 | Without cracking | No impurity |
| 20 | 20 | Without cracking | No impurity |
And (4) conclusion: when the steel is used in a D steel factory by using 20 furnaces, the phenomena of explosion cracking and the like do not occur in the using process, and no alumina and zirconia are mixed in the molten steel.
Example 5
The body comprises the following materials in percentage by weight: 62% of fused magnesia, 17% of graphite, 17% of fused quartz, 3% of metal silicon powder, 1% of boron nitride and 15% of added phenolic resin.
The lining comprises the following materials in percentage by weight: 60% of fused magnesia, 2% of graphite, 32% of fused quartz, 1% of boron carbide, 5% of ferrosilicon nitride and 12% of added phenolic resin.
The body material and the lining material are respectively granulated, dried and compounded with the bowl part, and are subjected to isostatic pressing, and then are fired into the integral composite tundish nozzle at 900 ℃ in an E steel plant by using a 55 furnace in a non-oxidizing atmosphere.
The performance of the composite tundish nozzle prepared in example 5 was measured, and the results were as follows:
| furnace shape | Duration of use | h | Burst condition | Condition of impurities |
| 55 furnace | 40 | No cracking | No impurity |
| 55 furnace | 50 | Without cracking | No impurity |
And (4) conclusion: when the steel is used in a 55-furnace in an E steel factory, the phenomena of explosion cracking and the like do not occur in the using process, and no alumina and zirconia are mixed in the molten steel.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a magnesium carbon tundish mouth of a river for cord steel, includes body, inside lining and bowl portion, its characterized in that, body, inside lining and bowl portion all adopt magnesium carbon composite to make.
2. The magnesium-carbon tundish nozzle for the cord steel according to claim 1, wherein the body comprises the following raw materials in proportion:
45-70% of fused magnesia or sintered magnesia, 5-20% of fused quartz, 20-30% of graphite, 1-6% of additive and 10-15% of phenolic resin;
the lining comprises the following raw materials in proportion:
45-70% of fused magnesia or sintered magnesia, 15-45% of fused quartz, 2-5% of graphite, 2-7% of an additive and 8-12% of phenolic resin.
3. The mg-c-tundish nozzle for cord steel according to claim 2, wherein the carbon content in the graphite is greater than 90%.
4. The magnesium-carbon tundish nozzle for the cord steel according to claim 2, wherein the additive is one or more of silicon metal powder, silicon carbide powder, boron carbide, silicon nitride, silicon iron nitride and boron nitride.
5. The magnesia-carbon tundish nozzle for the cord steel according to claim 2, wherein the chemical components of the fused magnesia or the sintered magnesia comprise MgO with content more than 90% and SiO2 with content less than or equal to 10%.
6. The magnesium-carbon tundish nozzle for cord steel according to claim 2, wherein the thickness of the magnesium-carbon composite material is 4-8mm.
7. The method for preparing the composite tundish nozzle for the cord steel according to any one of claims 1 to 6, comprising the following steps:
(1) The method comprises the following steps of (1) preparing a body pug by using fused magnesia or sintered magnesia, fused quartz and graphite as main raw materials, adding a proper amount of additives and phenolic resin as a bonding agent, and granulating and drying;
(2) The magnesia-carbon lining mud is prepared by adopting fused magnesia or sintered magnesia and fused quartz as main raw materials, adding a proper amount of additive and crystalline flake graphite, adopting phenolic resin as a bonding agent, granulating and drying;
(3) The magnesium carbon body, the magnesium carbon lining pug and the pug of the bowl part of the tundish nozzle are compounded, and are sintered at the temperature of 900-1100 ℃ in a non-oxidizing atmosphere after being formed by isostatic pressing, so that the required composite tundish nozzle can be prepared.
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| CN202211670308.8A CN115815581A (en) | 2022-12-12 | 2022-12-12 | Magnesium-carbon tundish nozzle for cord steel and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211670308.8A CN115815581A (en) | 2022-12-12 | 2022-12-12 | Magnesium-carbon tundish nozzle for cord steel and preparation method thereof |
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-
2022
- 2022-12-12 CN CN202211670308.8A patent/CN115815581A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS574375A (en) * | 1980-06-09 | 1982-01-09 | Nisshin Steel Co Ltd | Vessel for molten metal |
| CN105481390A (en) * | 2014-09-19 | 2016-04-13 | 青岛百键城环保科技有限公司 | Magnesia-carbon refractory material and preparation method therefor |
| CN109732073A (en) * | 2019-01-24 | 2019-05-10 | 北京利尔高温材料股份有限公司 | Water-coating port and preparation method thereof in a kind of continuous casting graded composite |
| CN111470851A (en) * | 2019-08-27 | 2020-07-31 | 北京利尔高温材料股份有限公司 | Rod body material for integral stopper rod |
| CN110918970A (en) * | 2019-11-15 | 2020-03-27 | 中天钢铁集团有限公司 | Submerged nozzle lining material for reducing wire breakage rate in silicon-deoxidized steel processing process |
| CN114438398A (en) * | 2022-02-10 | 2022-05-06 | 张家港荣盛特钢有限公司 | Method for controlling brittle inclusions in cord steel |
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