CN117020193A - Mechanical-pressing unfired magnesium-carbon composite tundish nozzle for cord steel - Google Patents

Mechanical-pressing unfired magnesium-carbon composite tundish nozzle for cord steel Download PDF

Info

Publication number
CN117020193A
CN117020193A CN202311037836.4A CN202311037836A CN117020193A CN 117020193 A CN117020193 A CN 117020193A CN 202311037836 A CN202311037836 A CN 202311037836A CN 117020193 A CN117020193 A CN 117020193A
Authority
CN
China
Prior art keywords
magnesia
carbon
fused
magnesium
graphite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311037836.4A
Other languages
Chinese (zh)
Inventor
鄢凤明
郭钰龙
徐业兴
赵志勇
孙肖肖
胡俊岩
张晗
代桂荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rizhao Ruihua New Material Technology Co ltd
Rizhao Lier High Temperature New Material Co ltd
Original Assignee
Rizhao Ruihua New Material Technology Co ltd
Rizhao Lier High Temperature New Material Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rizhao Ruihua New Material Technology Co ltd, Rizhao Lier High Temperature New Material Co ltd filed Critical Rizhao Ruihua New Material Technology Co ltd
Priority to CN202311037836.4A priority Critical patent/CN117020193A/en
Publication of CN117020193A publication Critical patent/CN117020193A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/03Shaped 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
    • C04B35/04Shaped 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 magnesium oxide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/50Pouring-nozzles
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66Monolithic refractories or refractory mortars, including those whether or not containing clay
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3817Carbides
    • C04B2235/3826Silicon carbides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3852Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3852Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/386Boron nitrides
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38Non-oxide ceramic constituents or additives
    • C04B2235/3852Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/3873Silicon nitrides, e.g. silicon carbonitride, silicon oxynitride
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/40Metallic constituents or additives not added as binding phase
    • C04B2235/402Aluminium
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422Carbon
    • C04B2235/425Graphite
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/428Silicon
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention discloses a mechanically-pressed unfired magnesia carbon composite tundish nozzle for cord steel, which belongs to the technical field of novel continuous casting functional refractory materials and comprises a magnesia carbon bowl part and a magnesia carbon body, wherein the magnesia carbon bowl part takes fused magnesia sand, graphite, additives and phenolic resin as raw materials, and the magnesia carbon bowl part comprises the following raw materials in percentage by weight: 85-92% of fused magnesia, 5-10% of graphite, 1-6% of additive and 4-8% of phenolic resin, wherein the magnesia carbon body is prepared from the raw materials of fused magnesia, fused quartz, graphite, additive and phenolic resin in percentage by weight: 60-80% of fused magnesia, 8-20% of fused quartz, 8-20% of graphite, 1-6% of additive and 5-10% of phenolic resin.

Description

Mechanical-pressing unfired magnesium-carbon composite tundish nozzle for cord steel
Technical Field
The invention relates to a mechanically-pressed unfired magnesium-carbon composite tundish nozzle for cord steel, belonging to the technical field of novel continuous casting functional refractory materials.
Background
In the metallurgical industry, the wire rod for the steel cord is recognized as a tip product in the wire rod, the production difficulty is very high, in the process of processing the cord steel, filaments with the length of 5.5mm are drawn to be 0.15mm in unit diameter, so that the length of the cord steel is extended by more than 1000 times, and in the subsequent double twisting process, the cord steel is subjected to a series of deformations such as torsion, stretching and bending, and therefore, the requirements of the purity, inclusion size and shape of the steel for the cord steel on the steel per se, the quality of the wire rod surface and the like are quite high, and the cord steel is one of the steel types with the greatest difficulty and the highest quality requirements in the wire rod product.
The greatest problem in producing the cord steel is deep drawing or curling fracture, and during the development of the cord steel, the fracture surface of the broken filaments is analyzed, and the existence of inclusions is found to be an important cause of the broken filaments of the cord steel, and by analyzing the inclusion components, it is known that the inclusions causing the broken filaments in the process are hard A1 which is difficult to be extended and broken during hot rolling and cold working 2 O 3 And ZrO(s) 2 Inclusion is mainly similar to A1 2 O 3 And ZrO(s) 2 The sources of (a) can be mainly divided into crystallization from molten steel and refractory introduction, and thus, the method has pertinency in smelting the cord steelProper refractory materials are designed and selected, so that broken wires in cord steel processing caused by inclusion are avoided.
The prior pouring ladle nozzle of the cast cord steel adopts the traditional aluminum carbon pouring ladle nozzle or zirconium pouring ladle nozzle, and both materials inevitably cause A1 in molten steel 2 O 3 And ZrO(s) 2 Inclusion-like, in order to solve A1 in the process of casting cord steel 2 O 3 And ZrO(s) 2 The problem of inclusion mixing in molten steel, obtaining the cord steel with purer cleanliness and higher quality, and changing the tundish nozzle into the ultralow aluminum zirconium-free magnesium-carbon material is needed to reduce A1 in the cord steel 2 O 3 And ZrO(s) 2 The mixing of brittle inclusions, etc., so that the development of the magnesium carbon material tundish nozzle with ultra-low aluminum and no zirconium for the whole body has practical use value for casting cord steel, but compared with the traditional aluminum carbon tundish nozzle and zirconium tundish nozzle, the magnesium carbon material has the defects of large thermal expansion coefficient and poor thermal shock stability, and the problem of cracking easily occurs when the magnesium carbon material tundish nozzle is used, so that the magnesium carbon material is rarely used as a body material of the tundish nozzle.
Disclosure of Invention
The invention aims to solve the problems and provide a mechanical pressing unfired magnesium-carbon composite tundish nozzle for cord steel, which can achieve proper sintering by means of heat energy in a use environment to form a structure with gradient characteristics, can improve the thermal shock stability of unfired bricks, and can greatly improve the yield of the cord steel and the quality of molten steel.
The invention realizes the aim through the following technical scheme that the mechanical pressing unfired magnesia carbon composite tundish nozzle for the cord steel comprises a magnesia carbon bowl part and a magnesia carbon body, wherein the magnesia carbon bowl part takes fused magnesia sand, graphite, additives and phenolic resin as raw materials, and the magnesia carbon bowl part comprises the following raw materials in percentage by weight: 85-92% of fused magnesia, 5-10% of graphite, 1-6% of additive and 4-8% of phenolic resin, wherein the magnesia carbon body takes the fused magnesia, fused quartz, graphite, additive and phenolic resin as raw materials, and the magnesia carbon body comprises the following raw materials in percentage by weight: 60-80% of fused magnesia, 8-20% of fused quartz, 8-20% of graphite, 1-6% of additive and 5-10% of phenolic resin.
The fused magnesia can be replaced by sintered magnesia, the carbon content is more than or equal to 95%, and the graphite content in the magnesia carbon bulk raw material is as follows: the carbon content is more than or equal to 90 percent, and the chemical components of the fused magnesia in the magnesia bowl raw material are as follows: mgO content is more than 96%, and the chemical components of the fused magnesia in the magnesia carbon bulk raw material are as follows: mgO content is more than 90%, S iO 2 Less than or equal to 10 percent, the additive is one or more of metal silicon powder, silicon carbide powder, metal aluminum powder, silicon nitride, ferrosilicon nitride and boron nitride, the pressure of a friction press is 630-1500 tons, the drying temperature is 200-250 ℃, the carbon residue of the phenolic resin is more than or equal to 40 percent, the solid content is more than or equal to 70 percent, and the viscosity is 10000-20000cps (25 ℃).
The beneficial effects of the invention are as follows: the invention adopts the mechanical pressing molding of the unburned magnesium-carbon composite tundish nozzle, achieves proper sintering by means of heat energy in the use environment, forms a structure with gradient characteristics, utilizes the characteristic that the thermal expansion coefficients of a main material and an additive are inconsistent, enables the unburned bricks to generate enough micro cracks under the use condition, and enables the cracks to expand in a quasi-static mode, thereby improving the thermal shock stability of the unburned bricks, being applied to the production of cord steel, avoiding the phenomenon that the traditional tundish nozzle introduces aluminum or zirconium inclusion into molten steel, resulting in easy breakage in the wire drawing process of the produced cord steel billet, and greatly improving the yield and the quality of the molten steel of the cord steel.
Drawings
FIG. 1 is a schematic view of a composite tundish nozzle according to the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 4 is a schematic diagram of a third embodiment of the present invention.
Fig. 5 is a schematic diagram of a fourth embodiment of the present invention.
Fig. 6 is a schematic diagram of a fifth embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-6, a mechanically pressed unfired magnesia carbon composite tundish nozzle for cord steel comprises a magnesia carbon bowl part and a magnesia carbon body, wherein the magnesia carbon bowl part takes fused magnesia, graphite, additives and phenolic resin as raw materials, and the magnesia carbon bowl part comprises the following raw materials in percentage by weight: 85-92% of fused magnesia, 5-10% of graphite, 1-6% of additive and 4-8% of phenolic resin, wherein the magnesia carbon body is prepared from the raw materials of fused magnesia, fused quartz, graphite, additive and phenolic resin in percentage by weight: 60-80% of fused magnesia, 8-20% of fused quartz, 8-20% of graphite, 1-6% of additive and 5-10% of phenolic resin.
The fused magnesia can be replaced by sintered magnesia, the carbon content is more than or equal to 95 percent, and the graphite content in the magnesia carbon bulk raw material is as follows: the carbon content is more than or equal to 90 percent, and the chemical components of the fused magnesia in the magnesia bowl raw material are as follows: mgO content is more than 96%, and the chemical components of the fused magnesia in the magnesia carbon bulk raw material are as follows: mgO content is more than 90%, si O 2 Less than or equal to 10 percent, additive is one or more of metal silicon powder, silicon carbide powder, metal aluminum powder, silicon nitride, silicon iron nitride and boron nitride, the pressure of a friction press is 630-1500 tons, the drying temperature is 200-250 ℃, the residual carbon of phenolic resin is more than or equal to 40 percent, the solid content is more than or equal to 70 percent, and the viscosity is 10000-20000cps (25 ℃).
When the invention is actually used, fused magnesia or sintered magnesia and graphite are adopted as main raw materials, a proper amount of additive is added, phenolic resin is adopted as a bonding agent, and the magnesia carbon bowl part and the body pug are respectively prepared after mixing; and adding the molten steel into a designed mold according to the requirement, forming by adopting a friction machine, and then drying at the temperature of 200-250 ℃ to obtain the required magnesium-carbon composite tundish nozzle.
Example 1
As a technical optimization scheme of the invention, as shown in fig. 2, the weight percentages of the raw materials of the magnesium-carbon bowl part are as follows: 85% of fused magnesia, 10% of graphite, 2% of metal silicon powder, 3% of silicon carbide powder and 8% of added phenolic resin; the weight percentages of the magnesium carbon bulk raw materials are as follows: 60% of fused magnesia, 20% of fused quartz, 15% of graphite, 3% of fused metal silicon powder, 2% of aluminum powder and 8% of added phenolic resin.
After the magnesium carbon bowl part and the magnesium carbon body material are respectively dried, 630 tons of pressure molding is adopted, and then the molding is carried out, the drying is carried out at the temperature of 200 ℃, the manufactured integral composite tundish nozzle is used in a 41-degree furnace of a certain steel mill for 30 hours, the phenomena of explosion and the like are avoided in the use process, and aluminum oxide and zirconium oxide are not mixed in molten steel.
Example two
As a technical optimization scheme of the invention, as shown in figure 3, the weight percentage of the raw materials of the magnesium-carbon bowl part is as follows: 92% of fused magnesia, 5% of graphite, 2% of boron nitride, 1% of silicon nitride powder and 4% of added phenolic resin; the weight percentages of the magnesium carbon bulk raw materials are as follows: 70% of fused magnesia, 15% of fused quartz, 10% of graphite, 3% of boron nitride, 2% of ferrosilicon nitride and 8% of added phenolic resin.
After the magnesium carbon bowl part and the magnesium carbon body material are respectively dried, 630 tons of pressure molding is adopted, and then the molding is carried out, the drying is carried out at the temperature of 200 ℃, the manufactured integral composite tundish nozzle is used in a 45-degree furnace of a certain steel mill for 33.5 hours, the phenomena of explosion and the like are avoided in the use process, and aluminum oxide and zirconium oxide are not mixed in molten steel.
Example III
As a technical optimization scheme of the invention, as shown in fig. 4, the weight percentages of the raw materials of the magnesium-carbon bowl part are as follows: 88% of fused magnesia, 10% of graphite, 2% of boron nitride and 6% of added phenolic resin; the weight percentages of the magnesium carbon bulk raw materials are as follows: 70% of fused magnesia, 12% of fused quartz, 15% of graphite, 3% of silicon nitride iron and 8% of added phenolic resin.
After the magnesium carbon bowl part and the magnesium carbon body material are respectively dried, 1500 tons of pressure molding is adopted, and the integral composite tundish nozzle prepared by drying at 200 ℃ is used in a certain steel mill for 48 furnaces for 36 hours, so that the phenomena of explosion and the like are avoided in the use process, and aluminum oxide and zirconium oxide are not mixed in molten steel.
Example IV
As a technical optimization scheme of the invention, as shown in fig. 5, the weight percentages of the raw materials of the magnesium-carbon bowl part are as follows: 87% of fused magnesia, 8% of graphite, 3% of metal aluminum powder, 2% of silicon nitride and 7% of added phenolic resin; the weight percentages of the magnesium carbon bulk raw materials are as follows: 76% of fused magnesia, 8% of fused quartz, 10% of graphite, 3% of fused metal silicon powder, 3% of ferrosilicon nitride and 8% of added phenolic resin.
After the magnesium carbon bowl part and the magnesium carbon body material are respectively dried and molded by adopting 1000 tons of pressure, the whole composite tundish nozzle manufactured by drying the whole composite tundish nozzle at 200 ℃ is used for 30 furnaces in a certain steel mill for 22.5 hours, the phenomena of explosion and the like are avoided in the use process, and alumina and zirconia are not mixed in molten steel.
Example five
As a technical optimization scheme of the invention, as shown in fig. 6, the weight percentages of the raw materials of the magnesium-carbon bowl part are as follows: 90% of fused magnesia, 8% of graphite, 1% of metal aluminum powder, 1% of boron nitride and 7% of added phenolic resin; the weight percentages of the magnesium carbon bulk raw materials are as follows: 66% of fused magnesia, 20% of fused quartz, 10% of graphite, 1% of fused metal silicon powder, 3% of silicon carbide and 8% of added phenolic resin.
After the magnesium carbon bowl part and the magnesium carbon body material are respectively dried, 1500 tons of pressure molding is adopted, and then the whole composite tundish nozzle is manufactured by drying at 200 ℃, a 55 furnace is used in a certain steel mill for 42 hours, the phenomena of explosion and the like are avoided in the use process, and aluminum oxide and zirconium oxide are not mixed in molten steel.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (8)

1. The utility model provides a package mouth of a river in machine pressure unburned magnesium carbon complex for cord steel which characterized in that: the magnesia carbon bowl comprises a magnesia carbon bowl body and a magnesia carbon body, wherein the magnesia carbon bowl body takes fused magnesia sand, graphite, additives and phenolic resin as raw materials, and the magnesia carbon bowl body comprises the following raw materials in percentage by weight: 85-92% of fused magnesia, 5-10% of graphite, 1-6% of additive and 4-8% of phenolic resin, wherein the magnesia carbon body takes the fused magnesia, fused quartz, graphite, additive and phenolic resin as raw materials, and the magnesia carbon body comprises the following raw materials in percentage by weight: 60-80% of fused magnesia, 8-20% of fused quartz, 8-20% of graphite, 1-6% of additive and 5-10% of phenolic resin.
2. The mechanically pressed unfired magnesium carbon composite tundish nozzle for cord steel according to claim 1, wherein: the fused magnesia can be replaced by sintered magnesia.
3. The mechanically pressed unfired magnesium carbon composite tundish nozzle for cord steel according to claim 1, wherein: the graphite content in the raw materials of the magnesium carbon bowl part is as follows: the carbon content is more than or equal to 95%, and the graphite content in the magnesia carbon bulk raw material is as follows: the carbon content is more than or equal to 90 percent.
4. The mechanically pressed unfired magnesium carbon composite tundish nozzle for cord steel according to claim 1, wherein: the electric smelting magnesia in the magnesia carbon bowl raw material comprises the following chemical components: mgO content is greater than 96%.
5. The mechanically pressed unfired magnesium carbon composite tundish nozzle for a cord steel according to claim 4, wherein: the chemical components of the fused magnesia in the magnesia carbon bulk raw material are as follows: mgO content is more than 90%, siO 2 ≤10%。
6. The mechanically pressed unfired magnesium carbon composite tundish nozzle for cord steel according to claim 1, wherein: the additive is one or more of metal silicon powder, silicon carbide powder, metal aluminum powder, silicon nitride, silicon iron nitride and boron nitride.
7. The mechanically pressed unfired magnesium carbon composite tundish nozzle for cord steel according to claim 1, wherein: the pressure of the friction press is 630-1500 tons, and the drying temperature is 200-250 ℃.
8. The mechanically pressed unfired magnesium carbon composite tundish nozzle for cord steel according to claim 1, wherein: the carbon residue of the phenolic resin is more than or equal to 40%, the solid content is more than or equal to 70%, and the viscosity is 10000-20000cps (25 ℃).
CN202311037836.4A 2023-08-17 2023-08-17 Mechanical-pressing unfired magnesium-carbon composite tundish nozzle for cord steel Pending CN117020193A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311037836.4A CN117020193A (en) 2023-08-17 2023-08-17 Mechanical-pressing unfired magnesium-carbon composite tundish nozzle for cord steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311037836.4A CN117020193A (en) 2023-08-17 2023-08-17 Mechanical-pressing unfired magnesium-carbon composite tundish nozzle for cord steel

Publications (1)

Publication Number Publication Date
CN117020193A true CN117020193A (en) 2023-11-10

Family

ID=88644582

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311037836.4A Pending CN117020193A (en) 2023-08-17 2023-08-17 Mechanical-pressing unfired magnesium-carbon composite tundish nozzle for cord steel

Country Status (1)

Country Link
CN (1) CN117020193A (en)

Similar Documents

Publication Publication Date Title
CN101811880A (en) Carbon-free refractory bricks and preparation method thereof
CN106892647B (en) Composite magnesia carbon brick and preparation method thereof
CN103586296B (en) Mosaic ceramic drawing die and making method thereof
CN112456973B (en) Magnesium current stabilizer for tundish and preparation method thereof
CN101367665B (en) Sintered alpha-beta aluminum oxide brick
CN111732419B (en) Ultra-low carbon magnesia carbon brick with excellent performance and preparation method thereof
CN114292095A (en) Preparation method of low-carbon corundum spinel impact brick suitable for smelting various steels
CN111470851A (en) Rod body material for integral stopper rod
CN102731122B (en) Production method of electro-fused zirconia-corundum bowl brick
CN112500135A (en) Magnesium-calcium tundish dry working lining material and preparation method thereof
CN113321495A (en) Cement-free high-performance pumping furnace hearth material
CN112759369A (en) Magnesia-carbon brick with high thermal shock stability
CN117020193A (en) Mechanical-pressing unfired magnesium-carbon composite tundish nozzle for cord steel
CN110981513A (en) Chrome corundum slag-high bauxite composite carbon-free ladle down nozzle brick and preparation method thereof
CN103693971A (en) Dolomite-periclase-calcium zirconate composite fireproof material and preparation method thereof
CN114315387A (en) Long-life pyrophyllite silicon carbide carbon brick and preparation method thereof
CN111763075A (en) Magnesia carbon brick and preparation method thereof
CN1108212C (en) Slide sprue brick containg sialon
CN113683426A (en) Baking-free high-strength metal ceramic composite material and preparation method and application thereof
CN113200753A (en) Pouring material for tundish cover and method for preparing tundish cover by using pouring material
CN111996475A (en) Titanium-aluminum refractory metal piece and preparation method thereof
CN110467447B (en) Forsterite whisker reinforced magnesium-silicon refractory material
CN112341222B (en) Hot metal ladle castable and preparation method thereof
CN112321281A (en) Composite brick cup and preparation process thereof
CN115815581A (en) Magnesium-carbon tundish nozzle for cord steel and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination