CN117447192B - Slag blocking plug and preparation method thereof - Google Patents

Slag blocking plug and preparation method thereof Download PDF

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Publication number
CN117447192B
CN117447192B CN202311449732.4A CN202311449732A CN117447192B CN 117447192 B CN117447192 B CN 117447192B CN 202311449732 A CN202311449732 A CN 202311449732A CN 117447192 B CN117447192 B CN 117447192B
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parts
particles
slag
benzene
particle size
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CN117447192A (en
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高荣彬
孙如莹
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Hengshui Zhaoxing Composite Materials Co ltd
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Hengshui Zhaoxing Composite Materials Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4653—Tapholes; Opening or plugging thereof
    • 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
    • C04B35/10—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 aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • 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
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • 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
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
    • 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
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • 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
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
    • 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
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6567—Treatment time
    • 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
    • C04B2235/77—Density
    • 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
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • 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
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

The invention relates to the technical field of metallurgical production continuous casting, and provides a slag blocking plug and a preparation method thereof. The slag blocking plug comprises a plug head part and a plug body part, wherein the plug head part and the plug body part are respectively independent and comprise the following raw materials in parts by mass: 55-65 parts of bauxite, 30-40 parts of magnesia, 10-15 parts of white corundum, 5-10 parts of brown corundum, 2-5 parts of borax, 4-8 parts of silica micropowder, 5-9 parts of phenolic resin and 1-5 parts of 1, 4-di (ethylene oxide-2-yl) benzene; the preparation method of the slag stopper comprises the following steps: bauxite, magnesia, white corundum, brown corundum, borax, silicon micropowder and 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed, and then the rest raw materials and water are added for continuous mixing, molding, demoulding and baking, so as to obtain the slag stopper. Through the technical scheme, the problem of low strength of the slag stopper made of phenolic resin in the prior art is solved.

Description

Slag blocking plug and preparation method thereof
Technical Field
The invention relates to the technical field of metallurgical production continuous casting, in particular to a slag stopper and a preparation method thereof.
Background
In order to reduce nonmetallic inclusion, accurately control molten steel components, reduce back phosphorus and alloy consumption, improve the absorptivity of alloy elements and improve the cleanliness of molten steel, slag-stopping steel tapping technology is widely adopted at home and abroad, slag-stopping steel tapping has a plurality of methods, and most commonly used slag-stopping balls, slag-stopping plugs, slag-stopping rods, slag-stopping caps and the like. Among them, the slag stopper has the best effect and is widely used.
The slag stopper is formed by mixing a castable base material and a bonding agent, pressing the mixture into a frustum shape and baking, wherein the bonding agent comprises an inorganic bonding agent and an organic bonding agent, and the inorganic bonding agent comprises phosphate, silicate, aluminate and the like, so that the problem of difficult phosphorus increase or demoulding of molten steel exists; at present, the commonly used organic binder is phenolic resin, but the prepared slag stopper has low strength.
Disclosure of Invention
The invention provides a slag stopper and a preparation method thereof, which solve the problem of low strength of the slag stopper made of phenolic resin in the related art.
The technical scheme of the invention is as follows:
the slag blocking plug comprises a plug head part and a plug body part, wherein the plug head part and the plug body part respectively independently comprise the following raw materials in parts by mass: 55-65 parts of bauxite, 30-40 parts of magnesia, 10-15 parts of white corundum, 5-10 parts of brown corundum, 2-5 parts of borax, 4-8 parts of silica powder, 5-9 parts of phenolic resin and 1-5 parts of 1, 4-di (ethylene oxide-2-yl) benzene.
CAS number of 1, 4-di (ethylene oxide-2-yl) benzene: 16832-58-9.
As a further technical scheme, the mass ratio of the phenolic resin to the 1, 4-di (ethylene oxide-2-yl) benzene is 7:2-4.
As a further technical scheme, the novel compound also comprises 1-5 parts of 1, 3-bis (2-isocyano-2-propyl) benzene.
As a further technical scheme, the mass ratio of the 1, 4-di (ethylene oxide-2-yl) benzene to the 1, 3-di (2-isocyano-2-propyl) benzene is 3:2-4.
As a further technical scheme, the bauxite is composed of particles with the particle size of less than or equal to 1mm, particles with the particle size of less than or equal to 3mm, particles with the particle size of less than or equal to 5mm, and particles with the particle size of less than or equal to 8mm, wherein the mass ratio of the particles is 5:11:3:1.
As a further technical scheme, the magnesia consists of particles with the particle size of less than or equal to 1mm, particles with the particle size of less than or equal to 3mm, and particles with the particle size of less than or equal to 5mm, wherein the mass ratio of the particles is 2:1:1.
As a further technical scheme, the white corundum consists of particles with the particle size of less than or equal to 1mm and 0 and particles with the particle size of less than or equal to 3mm in a mass ratio of 1:1.
The invention also provides a preparation method of the slag stopper, which comprises the following steps: bauxite, magnesia, white corundum, brown corundum, borax, silicon micropowder and 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed, and then the rest raw materials and water are added for continuous mixing, molding, demoulding and baking, so as to obtain the slag stopper.
As a further technical scheme, the water consumption is 6.5% -7.5% of the total mass of the raw materials.
The invention also provides application of the slag stopper or the slag stopper prepared by the preparation method in slag stopping tapping.
The working principle and the beneficial effects of the invention are as follows:
1. According to the invention, 1, 4-di (ethylene oxide-2-yl) benzene is added, and the phenolic resin and the 1, 4-di (ethylene oxide-2-yl) benzene react, so that the overall compactness of the slag stopper is improved, the compressive strength of the slag stopper is improved, the problem of low strength of the slag stopper made of phenolic resin in the prior art is solved, and the effect of improving the compressive strength of the slag stopper made of phenolic resin is achieved.
2. According to the invention, the mass ratio of the phenolic resin to the 1, 4-di (ethylene oxide-2-yl) benzene is limited to 7:2-4, so that the compressive strength of the slag stopper made of the phenolic resin is further improved.
3. According to the invention, 1, 3-bis (2-isocyano-2-propyl) benzene is further added, so that the compressive strength of the slag stopper made of phenolic resin is further improved.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill 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.
The following examples and comparative examples:
The bauxite contains more than or equal to 80wt% of Al, and consists of particles with the particle size of less than or equal to 1mm, particles with the particle size of less than or equal to 3mm, particles with the particle size of less than or equal to 5mm, and particles with the particle size of less than or equal to 8mm, wherein the mass ratio of 0:11:3:1, the particles with the particle size of less than or equal to 3mm, the particles with the particle size of less than or equal to 5mm, and the particles with the particle size of less than or equal to 8mm are purchased from Henan Lite refractory materials Co Ltd;
the magnesia is sintered magnesia with MgO content more than or equal to 93wt%, siO 2 content less than or equal to 3.5wt% and CaO content less than or equal to 1.6wt%, and consists of particles with the particle size less than or equal to 1mm, particles with the particle size less than or equal to 3mm, particles with the particle size less than or equal to 5mm and the mass ratio of 2:1:1, and is purchased from Shandong Boken International trade company;
the white corundum contains more than or equal to 99wt% of Al 2O3, less than or equal to 0.4wt% of Na 2 O, less than or equal to 0.02wt% of SiO 2 and less than or equal to 0.01wt% of magnetic substances, and consists of particles with the particle size of less than or equal to 1mm and the particle size of less than or equal to 3mm in a mass ratio of 1:1, and is purchased from Zhengzhou four-season fire refractory material Co Ltd;
The alumina brown contains Al 2O3 wt% or more, fe 2O3 wt% or less, siO 2 wt% or less, tiO 2 wt% or less and 3.0wt% or less, and has a particle size of 1mm or less, and is available from Zhengzhou Siji fire refractory Co., ltd;
The SiO 2 content in the silicon micropowder is 99.5wt%, the density is 1.5g/cm 3, the mesh number is 325 mesh, and the silicon micropowder is purchased from the manufacturing plant of the epitaxial mineral products in Lingshu county.
Example 1
60 Parts of bauxite, 35 parts of magnesia, 13 parts of white corundum, 7 parts of brown corundum, 4 parts of borax, 6 parts of silicon micropowder and 1 part of 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed in a stirrer for 5min, 7 parts of phenolic resin and 9.5 parts of water are added to be continuously mixed for 10min, the mixture is transferred into a mould to be subjected to vibration molding, the mould is naturally placed for 10h and then is demolded, the mould is naturally maintained for 3 days, the mould is placed in a heating furnace to be baked for 1.5h at 50 ℃ firstly, the temperature is raised to 100 ℃ to be continuously baked for 1.5h, and finally the mould is baked for 1h at 200 ℃ and cooled to obtain the slag blocking plug.
Example 2
55 Parts of bauxite, 30 parts of magnesia, 10 parts of white corundum, 5 parts of brown corundum, 2 parts of borax, 4 parts of silicon micropowder and 1 part of 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed in a stirrer for 5min, 5 parts of phenolic resin and 7.3 parts of water are added to be continuously mixed for 10min, the mixture is transferred into a mould to be subjected to vibration molding, the mould is naturally placed for 10h and then is demolded, the mould is naturally maintained for 3 days, the mould is placed in a heating furnace to be baked for 1.5h at 50 ℃ firstly, the temperature is raised to 100 ℃ to be continuously baked for 1.5h, and finally the mould is baked for 1h at 200 ℃ and cooled to obtain the slag blocking plug.
Example 3
Mixing 65 parts of bauxite, 40 parts of magnesia, 15 parts of white corundum, 10 parts of brown corundum, 5 parts of borax, 8 parts of silicon micropowder and 1 part of 1, 4-di (ethylene oxide-2-yl) benzene in a stirrer uniformly for 5min, adding 9 parts of phenolic resin and 11.5 parts of water, continuously mixing for 10min, transferring into a mould, vibrating and forming, naturally standing for 10h, demoulding, naturally curing for 3 days, placing into a heating furnace, firstly baking at 50 ℃ for 1.5h, heating to 100 ℃ for continuously baking for 1.5h, finally baking at 200 ℃ for 1h, and cooling to obtain the slag blocking plug.
Example 4
60 Parts of bauxite, 35 parts of magnesia, 13 parts of white corundum, 7 parts of brown corundum, 4 parts of borax, 6 parts of silicon micropowder and 2 parts of 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed in a stirrer for 5min, 7 parts of phenolic resin and 9.5 parts of water are added to be continuously mixed for 10min, the mixture is transferred into a mould to be subjected to vibration molding, the mould is naturally placed for 10h and then is demolded, the mould is naturally maintained for 3 days, the mould is placed in a heating furnace to be baked for 1.5h at 50 ℃ firstly, the temperature is raised to 100 ℃ to be continuously baked for 1.5h, and finally the mould is baked for 1h at 200 ℃ and cooled to obtain the slag blocking plug.
Example 5
60 Parts of bauxite, 35 parts of magnesia, 13 parts of white corundum, 7 parts of brown corundum, 4 parts of borax, 6 parts of silicon micropowder and 3 parts of 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed in a stirrer for 5min, 7 parts of phenolic resin and 9.5 parts of water are added to be continuously mixed for 10min, the mixture is transferred into a mould to be subjected to vibration molding, the mould is naturally placed for 10h and then is demolded, the mould is naturally maintained for 3 days, the mould is placed in a heating furnace to be baked for 1.5h at 50 ℃ firstly, the temperature is raised to 100 ℃ to be continuously baked for 1.5h, and finally the mould is baked for 1h at 200 ℃ and cooled to obtain the slag blocking plug.
Example 6
60 Parts of bauxite, 35 parts of magnesia, 13 parts of white corundum, 7 parts of brown corundum, 4 parts of borax, 6 parts of silicon micropowder and 4 parts of 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed in a stirrer for 5min, 7 parts of phenolic resin and 9.5 parts of water are added to be continuously mixed for 10min, the mixture is transferred into a mould to be subjected to vibration molding, the mould is naturally placed for 10h and then is demolded, the mould is naturally maintained for 3 days, the mould is placed in a heating furnace to be baked for 1.5h at 50 ℃ firstly, the temperature is raised to 100 ℃ to be continuously baked for 1.5h, and finally the mould is baked for 1h at 200 ℃ and cooled to obtain the slag blocking plug.
Example 7
60 Parts of bauxite, 35 parts of magnesia, 13 parts of white corundum, 7 parts of brown corundum, 4 parts of borax, 6 parts of silicon micropowder and 5 parts of 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed in a stirrer for 5min, 7 parts of phenolic resin and 9.5 parts of water are added to be continuously mixed for 10min, the mixture is transferred into a mould to be subjected to vibration molding, the mould is naturally placed for 10h and then is demolded, the mould is naturally maintained for 3 days, the mould is placed in a heating furnace to be baked for 1.5h at 50 ℃ firstly, the temperature is raised to 100 ℃ to be continuously baked for 1.5h, and finally the mould is baked for 1h at 200 ℃ and cooled to obtain the slag blocking plug.
Example 8
60 Parts of bauxite, 35 parts of magnesia, 13 parts of white corundum, 7 parts of brown corundum, 4 parts of borax, 6 parts of silicon micropowder and 3 parts of 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed in a stirrer for 5min, 7 parts of phenolic resin, 9.5 parts of water and 1 part of 1, 3-di (2-isocyano-2-propyl) benzene are added, the mixture is continuously mixed for 10min, the mixture is transferred into a mould to be subjected to vibration molding, naturally placed for 10h, then demoulded, naturally cured for 3 days, then placed in a heating furnace to be baked for 1.5h at 50 ℃, heated to 100 ℃ to be continuously baked for 1.5h, finally baked for 1h at 200 ℃, and cooled to obtain a slag blocking plug.
Example 9
60 Parts of bauxite, 35 parts of magnesia, 13 parts of white corundum, 7 parts of brown corundum, 4 parts of borax, 6 parts of silicon micropowder and 3 parts of 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed in a stirrer for 5min, 7 parts of phenolic resin, 9.5 parts of water and 2 parts of 1, 3-di (2-isocyano-2-propyl) benzene are added, the mixture is continuously mixed for 10min, the mixture is transferred into a mould to be subjected to vibration molding, naturally placed for 10h, then demoulded, naturally cured for 3 days, then placed in a heating furnace to be baked for 1.5h at 50 ℃, heated to 100 ℃ to be continuously baked for 1.5h, finally baked for 1h at 200 ℃, and cooled to obtain a slag blocking plug.
Example 10
60 Parts of bauxite, 35 parts of magnesia, 13 parts of white corundum, 7 parts of brown corundum, 4 parts of borax, 6 parts of silicon micropowder and 3 parts of 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed in a stirrer for 5min, 7 parts of phenolic resin, 9.5 parts of water and 3 parts of 1, 3-di (2-isocyano-2-propyl) benzene are added, the mixture is continuously mixed for 10min, the mixture is transferred into a mould to be subjected to vibration molding, naturally placed for 10h, then demoulded, naturally cured for 3 days, then placed in a heating furnace to be baked for 1.5h at 50 ℃, heated to 100 ℃ to be continuously baked for 1.5h, finally baked for 1h at 200 ℃, and cooled to obtain a slag blocking plug.
Example 11
60 Parts of bauxite, 35 parts of magnesia, 13 parts of white corundum, 7 parts of brown corundum, 4 parts of borax, 6 parts of silicon micropowder and 3 parts of 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed in a stirrer for 5min, 7 parts of phenolic resin, 9.5 parts of water and 4 parts of 1, 3-di (2-isocyano-2-propyl) benzene are added, the mixture is continuously mixed for 10min, the mixture is transferred into a mould to be subjected to vibration molding, naturally placed for 10h, then demoulded, naturally cured for 3 days, then placed in a heating furnace to be baked for 1.5h at 50 ℃, heated to 100 ℃ to be continuously baked for 1.5h, finally baked for 1h at 200 ℃, and cooled to obtain a slag blocking plug.
Example 12
60 Parts of bauxite, 35 parts of magnesia, 13 parts of white corundum, 7 parts of brown corundum, 4 parts of borax, 6 parts of silicon micropowder and 3 parts of 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed in a stirrer for 5min, 7 parts of phenolic resin, 9.5 parts of water and 5 parts of 1, 3-di (2-isocyano-2-propyl) benzene are added, the mixture is continuously mixed for 10min, the mixture is transferred into a mould to be subjected to vibration molding, naturally placed for 10h, then demoulded, naturally cured for 3 days, then placed in a heating furnace to be baked for 1.5h at 50 ℃, heated to 100 ℃ to be continuously baked for 1.5h, finally baked for 1h at 200 ℃, and cooled to obtain a slag blocking plug.
Comparative example 1
60 Parts of bauxite, 35 parts of magnesia, 13 parts of white corundum, 7 parts of brown corundum, 4 parts of borax and 6 parts of silicon micropowder are uniformly mixed in a stirrer for 5min, 7 parts of phenolic resin and 9.5 parts of water are added, the mixture is continuously mixed for 10min, the mixture is transferred into a mould for vibration molding, the mould is naturally placed for 10h and then is demolded, the mould is naturally maintained for 3 days, the mould is placed in a heating furnace and is baked at 50 ℃ for 1.5h, the temperature is raised to 100 ℃ and is continuously baked at 200 ℃ for 1h, and finally, the slag stopper is obtained after cooling.
Performance test:
the compressive strength at 1100 ℃ and 1500 ℃ for 1 hour were measured by referring to the method in GB/T34218-2017 method for high temperature compressive strength test of refractory materials, respectively, and the test results are recorded in Table 1.
TABLE 1 compressive Strength of slag stopper
As can be seen from Table 1, the slag stopper provided by the invention has the compressive strength of more than 54.8MPa at 1100 ℃ for 1h, the compressive strength of more than 76.2MPa at 1500 ℃ for 1h, and good compressive strength.
Examples 1 to 12 compared with comparative example 1, phenolic resins and 1, 4-bis (ethylene oxide-2-yl) benzene were used in examples 1 to 12, phenolic resins were used in comparative example 1, and the compressive strength of the stopper obtained in examples 1 to 12 was higher than that of comparative example 1, indicating that 1, 4-bis (ethylene oxide-2-yl) benzene can improve the compressive strength of the stopper made of phenolic resins.
Examples 8 to 12 compared with examples 1 to 7, examples 8 to 12 were added with 1, 3-bis (2-isocyano-2-propyl) benzene, examples 1 to 7 were not added with 1, 3-bis (2-isocyano-2-propyl) benzene, and the slag stopper obtained in examples 8 to 12 had a higher compressive strength than examples 1 to 7, indicating that the addition of 1, 3-bis (2-isocyano-2-propyl) benzene further improved the compressive strength of the slag stopper made of phenolic resin.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims (9)

1. The slag blocking plug comprises a plug head part and a plug body part, and is characterized in that the plug head part and the plug body part respectively independently comprise the following raw materials in parts by mass: 55-65 parts of bauxite, 30-40 parts of magnesia, 10-15 parts of white corundum, 5-10 parts of brown corundum, 2-5 parts of borax, 4-8 parts of silica powder, 5-9 parts of phenolic resin, 1-5 parts of 1, 4-bis (ethylene oxide-2-yl) benzene and 1-5 parts of 1, 3-bis (2-isocyano-2-propyl) benzene.
2. The slag stopper according to claim 1, wherein the mass ratio of the phenolic resin to the 1, 4-di (ethylene oxide-2-yl) benzene is 7:2-4.
3. The slag stopper according to claim 1, wherein the mass ratio of the 1, 4-di (ethylene oxide-2-yl) benzene to the 1, 3-di (2-isocyano-2-propyl) benzene is 3:2-4.
4. The slag stopper according to claim 1, wherein the bauxite is composed of particles with a particle size of 0 < 1mm, particles with a particle size of 3mm, particles with a particle size of 5mm, and particles with a particle size of 8mm, wherein the mass ratio of the particles is 5:11:3:1.
5. The slag stopper according to claim 1, wherein the magnesia consists of particles with a particle size of 0 < 1mm, particles with a particle size of 1mm < 3mm and particles with a particle size of 3mm < 5mm in a mass ratio of 2:1:1.
6. A slag stopper according to claim 1, wherein the white corundum is composed of particles with a particle size of 0 < 1mm and particles with a particle size of 1mm < 3mm in a mass ratio of 1:1.
7. The method for preparing the slag stopper according to any one of claims 1 to 6, comprising the steps of: bauxite, magnesia, white corundum, brown corundum, borax, silicon micropowder and 1, 4-di (ethylene oxide-2-yl) benzene are uniformly mixed, and then the rest raw materials and water are added for continuous mixing, molding, demoulding and baking, so as to obtain the slag stopper.
8. The method for preparing the slag stopper according to claim 7, wherein the water is used in an amount of 6.5% -7.5% of the total mass of the raw materials.
9. The use of the slag stopper according to any one of claims 1 to 6 or the slag stopper produced by the production method according to any one of claims 7 to 8 in slag tapping.
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Publication number Priority date Publication date Assignee Title
CN103342568A (en) * 2013-07-31 2013-10-09 高金菊 Flame-retardant coating casting material for guide rod of skimming plug
CN103740885A (en) * 2014-02-28 2014-04-23 芜湖市天雄新材料科技有限公司 Preparation method of slag blocking plug
CN103755360A (en) * 2013-12-16 2014-04-30 芜湖市天雄新材料科技有限公司 Guide rod pouring material of slag blocking plug used for converter tapping slag blocking
CN103936446A (en) * 2014-04-14 2014-07-23 芜湖奕辰模具科技有限公司 Method for preparing guide rod casting material for floating plug
WO2022237727A1 (en) * 2021-05-10 2022-11-17 淄博市鲁中耐火材料有限公司 Corrosion-resistant refractory material, preparation method therefor, and use thereof
CN116675517A (en) * 2023-07-31 2023-09-01 河北国亮新材料股份有限公司 Environment-friendly tundish dry material and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103342568A (en) * 2013-07-31 2013-10-09 高金菊 Flame-retardant coating casting material for guide rod of skimming plug
CN103755360A (en) * 2013-12-16 2014-04-30 芜湖市天雄新材料科技有限公司 Guide rod pouring material of slag blocking plug used for converter tapping slag blocking
CN103740885A (en) * 2014-02-28 2014-04-23 芜湖市天雄新材料科技有限公司 Preparation method of slag blocking plug
CN103936446A (en) * 2014-04-14 2014-07-23 芜湖奕辰模具科技有限公司 Method for preparing guide rod casting material for floating plug
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