CN112775423A - Combined integral composite stopper rod and preparation method thereof - Google Patents

Combined integral composite stopper rod and preparation method thereof Download PDF

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Publication number
CN112775423A
CN112775423A CN202110137864.8A CN202110137864A CN112775423A CN 112775423 A CN112775423 A CN 112775423A CN 202110137864 A CN202110137864 A CN 202110137864A CN 112775423 A CN112775423 A CN 112775423A
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China
Prior art keywords
parts
slag line
stopper rod
reinforcing sleeve
rod
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CN202110137864.8A
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Chinese (zh)
Inventor
周胜强
鄢凤明
董燹
魏勇
王次明
刘丽
颜浩
崔志强
任林
刘靖轩
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Beijing Lier High Temperature Materials Co Ltd
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Beijing Lier High Temperature Materials Co Ltd
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Priority to CN202110137864.8A priority Critical patent/CN112775423A/en
Publication of CN112775423A publication Critical patent/CN112775423A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/18—Stopper-rods therefor
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
    • C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
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    • 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
    • C04B35/44—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 aluminates
    • C04B35/443—Magnesium aluminate spinel
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    • C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
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    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
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  • Materials Engineering (AREA)
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  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

The invention belongs to the technical field of continuous casting functional refractory materials, and discloses a combined integral composite stopper rod and a preparation method thereof, wherein the combined integral composite stopper rod comprises a rod head, a transition section, a rod body and an inner cavity arranged in the inner axis of the rod body, a slag line reinforcing sleeve is arranged on the outer circumferential wall of the rod body, the slag line reinforcing sleeve is embedded on the outer wall of the rod body through fire clay, the thickness of the slag line reinforcing sleeve is 10-30mm, the height of the slag line reinforcing sleeve is 200-500mm, and the material is one of an aluminum carbon material, a spinel material, a magnesium carbon material or a zirconium carbon material. According to the invention, the slag line reinforcing sleeve is embedded in the slag line part of the stopper rod body, so that the stress borne by the whole stopper rod body in the use process is reduced, sleeves made of different materials can be adopted according to the erosion mechanism of the covering agent in field use, the erosion of the covering agent to the slag line part of the stopper rod body is effectively avoided, and the phenomenon that the stopper rod body is fractured due to the vibration of a tundish mechanism, the encrusting of the covering agent and the erosion thinning of the slag line of the traditional stopper rod is enhanced.

Description

Combined integral composite stopper rod and preparation method thereof
Technical Field
The invention relates to the technical field of continuous casting functional refractory materials, in particular to a combined integral composite stopper rod and a preparation method thereof.
Background
The integral stopper rod used in the continuous casting process is generally composed of a rod body and a rod head, and is applied to a tundish in the continuous casting process. The stopper rod has very strict use conditions, and can bear the baking of high-temperature gas, the strong thermal shock and the violent scouring in the initial steel casting stage, the impact and the erosion of molten steel and a covering agent, and the stress impact caused by the vibration of a tundish mechanism, particularly under the condition that the tundish covering agent is encrusted, the stress is larger, and the breakage accident of the stopper rod is easily caused.
At present, the whole stopper rod body in the prior art is mainly made of aluminum carbon, the whole stopper rod is subjected to thermal shock when in use, the whole stopper rod must have certain thermal shock resistance and rupture strength, the problems of rod breakage and the like cannot occur, otherwise, the continuous casting can be interrupted, and great economic loss is caused to a steel mill. In addition, the stopper rod body is influenced by vibration of the tundish mechanism and incrustation of the covering agent in the using process, the received breaking resistance is increased, and the breaking resistance is repeatedly applied to the stopper rod body, so that tiny cracks in the stopper rod body are continuously expanded, the stopper rod is finally broken, and tundish accidents are caused to be poured off. Meanwhile, the slag line part of the integral stopper rod is corroded by the tundish covering agent, and the service life of the slag line part is determined by the corrosion resistance. Therefore, in order to prolong the service life of the stopper rod, the improvement of the anti-breaking force bearing capacity and the anti-corrosion performance of the whole stopper rod is particularly necessary according to different steel casting conditions.
Disclosure of Invention
The invention aims to provide a combined integral composite stopper rod and a preparation method thereof, and the composite stopper rod can effectively relieve the stress of a rod body and simultaneously avoid the problem that the slag line part of the traditional integral stopper rod body is gradually thinned to form a weak point in the using process due to corrosion, so that the rod body is finally broken.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a combined integral composite stopper rod, which comprises a rod head, a transition section and a rod body;
one end of the rod body is fixedly connected with the rod head through a transition section, the other end of the rod body is provided with an inlet hole, and the screw rod is in threaded connection with the screw block through the inlet hole when the stopper rod works;
the outer circumferential wall of the rod body is provided with a slag line reinforcing sleeve, and the slag line reinforcing sleeve is embedded in the outer wall of the rod body through fire clay;
an inner cavity is arranged at the inner axis of the composite stopper rod; a silk block is arranged at the position 50-100mm away from one end of the rod head in the inner cavity; the silk piece is fixed at the outer circumferential wall of the inner cavity.
Preferably, in the combined integral composite stopper rod, the thickness of the slag line reinforcing sleeve is 10-30mm, and the height is 200-500 mm.
Preferably, in the above combined integral composite stopper rod, the distance between the end of the slag line reinforcing sleeve far away from the rod head and the end of the rod body far away from the rod head is h1, the height of the slag line reinforcing sleeve is h2, and the ratio of the height of the slag line reinforcing sleeve to the height of the rod body is h 1: h2 is 1-3: 1-2.
Preferably, in the above-mentioned compound stopper rod of whole combination, the stick head is one of magnesium carbon material, spinel material or aluminium carbon material, the changeover portion is spinel material or aluminium carbon material, the barrel is aluminium carbon material, the slag line uide bushing is one of aluminium carbon material, spinel material, magnesium carbon material or zirconium carbon material.
Preferably, in the above combined integral composite stopper rod, the slag line reinforcing sleeve made of aluminum carbon is composed of the following raw materials in parts by weight: 70-85 parts of white corundum or brown corundum, 10-25 parts of graphite, 2-5 parts of additive and 10-15 parts of binding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the binding agent is phenolic resin.
Preferably, in the above combined integral composite stopper rod, the spinel slag line reinforcing sleeve is composed of the following raw materials in parts by weight: 70-85 parts of sintered or fused spinel, 10-25 parts of graphite, 2-5 parts of additive and 10-15 parts of bonding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the binding agent is phenolic resin.
Preferably, in the above combined integral composite stopper rod, the slag line reinforcing sleeve made of magnesium carbon is composed of the following raw materials in parts by weight: 70-85 parts of sintered or fused magnesia, 10-25 parts of graphite, 2-5 parts of an additive and 10-15 parts of a bonding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the binding agent is phenolic resin.
Preferably, in the above combined integral composite stopper rod, the slag line reinforcing sleeve made of zirconium carbon is composed of the following raw materials in parts by weight: 70-85 parts of electric melting stable zirconia, 10-25 parts of graphite, 2-5 parts of an additive and 10-15 parts of a bonding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the binding agent is phenolic resin.
The invention also provides a preparation method of the combined integral composite stopper rod, wherein the slag line reinforcing sleeve is embedded on the outer wall of the stopper body through fire clay, and is dried and sprayed with the anti-oxidation coating, so that the combined integral composite stopper rod is obtained.
Preferably, in the above method for preparing the combined integral composite stopper rod, the forming method of the slag line reinforcing sleeve is isostatic pressing or mechanical pressing;
the isostatic compaction step comprises the following steps: weighing raw materials in proportion, uniformly mixing, granulating, drying, isostatic pressing, and calcining at the temperature of 900-1100 ℃ in a non-oxidizing atmosphere to obtain a slag line reinforcing sleeve;
the machine pressing molding step is as follows: weighing the raw materials in proportion, uniformly mixing, molding by mechanical pressing, and drying in an atmosphere with the temperature of 180-.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
according to the combined integral composite stopper rod provided by the invention, the sleeve made of the aluminum carbon material or the spinel material or the magnesium carbon material or the zirconium carbon material is embedded at the slag line part of the stopper rod body, and meanwhile, the arrangement of the slag line reinforcing sleeve structure not only reduces the stress borne by the integral stopper rod body in the use process, but also adopts the sleeves made of different materials aiming at the erosion mechanism of the covering agent in the field use, so that the erosion of the covering agent to the slag line part of the stopper rod body is effectively avoided, and the phenomenon that the stopper rod body is fractured due to the vibration of a tundish mechanism, the crusting of the covering agent and the erosion thinning of the slag line of the traditional stopper rod is enhanced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of the combined integral composite stopper rod of the present invention.
In the figure, 1-club head; 2-a transition section; 3-a stick body; 4-slag line reinforcing sleeve; 5-inner cavity; 6-silk block; 7-entering the hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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 provides a combined integral composite stopper rod, which comprises a rod head 1, a transition section 2 and a rod body 3, as shown in figure 1; one end of the rod body 3 is fixedly connected with the rod head 1 through the transition section 2, the other end of the rod body is provided with a feed hole 7, and the screw rod is in threaded connection with the screw block 6 through the feed hole 7 when the composite stopper rod works; the outer circumferential wall of the rod body 3 is provided with a slag line reinforcing sleeve 4, and the slag line reinforcing sleeve 4 is embedded in the outer wall of the rod body 3 through fire clay; an inner cavity 5 is arranged at the inner axis of the composite stopper rod; a silk block 6 is arranged at the 50-100mm position of one end of the inner cavity 5 far away from the rod head 1; the wire block 6 is fixed on the outer circumferential wall of the inner cavity 5.
Wherein, the thickness of the slag line reinforcing sleeve 4 is 10-30mm, and the height thereof is 200-500 mm; the distance between one end of the slag line reinforcing sleeve 4 far away from the rod head 1 and one end of the rod body 3 far away from the rod head 1 is h1, the height of the slag line reinforcing sleeve 4 is h2, h 1: h2 is 1-3: 1-2.
Club head 1 is one of magnesium carbon material, spinel material or aluminium carbon material, and changeover portion 2 is spinel material or aluminium carbon material, and shaft 3 is aluminium carbon material, and slag line uide bushing 4 is one of aluminium carbon material, spinel material, magnesium carbon material or zirconium carbon material.
The aluminum-carbon slag line reinforcing sleeve 4 is composed of the following raw materials in parts by weight: 70-85 parts of white corundum or brown corundum, 10-25 parts of graphite, 2-5 parts of additive and 10-15 parts of binding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the bonding agent is phenolic resin.
The spinel slag line reinforcing sleeve 4 is composed of the following raw materials in parts by weight: 70-85 parts of sintered or fused spinel, 10-25 parts of graphite, 2-5 parts of additive and 10-15 parts of bonding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the bonding agent is phenolic resin.
The slag line reinforcing sleeve 4 made of the magnesium-carbon material is composed of the following raw materials in parts by weight: 70-85 parts of sintered or fused magnesia, 10-25 parts of graphite, 2-5 parts of an additive and 10-15 parts of a bonding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the bonding agent is phenolic resin.
The slag line reinforcing sleeve 4 made of zirconium carbon is composed of the following raw materials in parts by weight: 70-85 parts of electric melting stable zirconia, 10-25 parts of graphite, 2-5 parts of an additive and 10-15 parts of a bonding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the bonding agent is phenolic resin.
The invention also provides a preparation method of the combined integral composite stopper rod, which is characterized in that the slag line reinforcing sleeve 4 is embedded on the outer wall of the stopper body 3 through fire clay, and after being dried at room temperature or 110-220 ℃, an anti-oxidation coating is sprayed to obtain the combined integral composite stopper rod.
Wherein the forming method of the slag line reinforcing sleeve 4 is isostatic pressing forming or mechanical pressing forming; the isostatic compaction step comprises: weighing raw materials in proportion, uniformly mixing, granulating, drying, isostatic pressing, calcining at the temperature of 900-1100 ℃ in a non-oxidizing atmosphere to obtain a slag line reinforcing sleeve 4; the mechanical pressing molding step is as follows: weighing the raw materials in proportion, uniformly mixing, molding by mechanical pressing, and drying in an atmosphere with the temperature of 180-.
Example 1
The slag line reinforcing sleeve 4 is made of spinel and is composed of the following raw materials in parts by weight: 75 parts of sintered spinel, 23 parts of graphite, 2 parts of metal silicon powder and 15 parts of phenolic resin. The raw materials are weighed according to a proportion, evenly mixed, granulated, dried, shaped by isostatic pressing, calcined at 900 ℃ in a non-oxidizing atmosphere to obtain a slag line reinforcing sleeve 4 with the thickness of 20mm and the height of 300mm, then embedded on the outer wall of the corresponding rod body 3 by using fire clay, and after being dried at room temperature, an anti-oxidation coating is sprayed, and the manufactured combined integral composite stopper rod is used in a certain steel mill for 45 furnaces for 32 hours, and the slag line part of the stopper rod has good erosion resistance and does not have the phenomenon of rod breakage in the using process.
Example 2
The slag line reinforcing sleeve 4 is made of aluminum carbon and is composed of the following raw materials in parts by weight: 70 parts of brown corundum, 25 parts of graphite, 5 parts of metal silicon powder and 12 parts of phenolic resin. The raw materials are weighed according to a proportion, evenly mixed, granulated, dried, shaped by isostatic pressing, calcined at 950 ℃ in a non-oxidizing atmosphere to obtain a slag line reinforcing sleeve 4 with the thickness of 15mm and the height of 350mm, then embedded on the outer wall of the corresponding rod body 3 by using fire clay, and after being dried at room temperature, an anti-oxidation coating is sprayed, and the manufactured combined integral composite stopper rod is used in a certain steel mill for 60 hours, and is used for 42 hours, and in the using process, the slag line part of the stopper rod has good erosion resistance and the phenomenon of rod breakage does not occur.
Example 3
The slag line reinforcing sleeve 4 is made of magnesium carbon and is composed of the following raw materials in parts by weight: 75 parts of sintered magnesia, 20 parts of graphite, 2 parts of metal silicon powder, 3 parts of silicon carbide powder and 13 parts of phenolic resin. The raw materials are weighed according to a proportion, evenly mixed, granulated, dried, shaped by isostatic pressing, calcined at 900 ℃ in a non-oxidizing atmosphere to obtain a slag line reinforcing sleeve 4 with the thickness of 30mm and the height of 400mm, then embedded on the outer wall of the corresponding rod body 3 by using fire clay, and after being dried at room temperature, an anti-oxidation coating is sprayed, and the manufactured combined integral composite stopper rod is used in a certain steel mill for 45 furnaces for 32 hours, and the slag line part of the stopper rod has good erosion resistance and does not have the phenomenon of rod breakage in the using process.
Example 4
The slag line reinforcing sleeve 4 is made of spinel and is composed of the following raw materials in parts by weight: 85 parts of electric melting spinel, 10 parts of graphite, 3 parts of metal silicon powder, 2 parts of silicon carbide powder and 10 parts of phenolic resin. The raw materials are weighed according to a proportion, evenly mixed, granulated, dried, shaped by isostatic pressing, calcined at the temperature of 1100 ℃ in a non-oxidizing atmosphere to obtain a slag line reinforcing sleeve 4 with the thickness of 10mm and the height of 200mm, then embedded on the outer wall of the corresponding rod body 3 by using fire clay, dried at room temperature, and sprayed with an anti-oxidation coating, and the manufactured combined integral composite stopper rod is used in a certain steel mill for 55 furnaces for 40 hours, and the slag line part of the stopper rod has good erosion resistance and does not have the phenomenon of rod breakage in the using process.
Example 5
The slag line reinforcing sleeve 4 is made of zirconium carbon and comprises the following raw materials in parts by weight: 85 parts of electrofusion-stabilized zirconia, 10 parts of graphite, 4 parts of metal silicon powder, 1 part of boron carbide and 11 parts of phenolic resin. The raw materials are weighed according to a proportion, evenly mixed, granulated, dried, shaped by isostatic pressing, calcined at the temperature of 1000 ℃ in a non-oxidizing atmosphere to obtain the slag line reinforcing sleeve 4 with the thickness of 15mm and the height of 350mm, then embedded on the outer wall of the corresponding rod body 3 by using fire clay, and after being dried at room temperature, sprayed with an anti-oxidation coating, and the manufactured combined integral composite stopper rod is used in a certain steel mill for 80 hours, and is used for 58 hours, and in the using process, the slag line part of the stopper rod has good erosion resistance and the phenomenon of rod breakage does not occur.
Example 6
The slag line reinforcing sleeve 4 is made of zirconium carbon and comprises the following raw materials in parts by weight: 70 parts of electrofusion-stabilized zirconia, 25 parts of graphite, 4 parts of metal silicon powder, 1 part of silicon carbide powder and 15 parts of phenolic resin. The raw materials are weighed according to a proportion, uniformly mixed, molded by machine pressing, dried in the atmosphere at the temperature of 200 ℃ to obtain the slag line reinforcing sleeve 4 with the thickness of 25mm and the height of 250mm, then embedded on the outer wall of the corresponding rod body 3 by using fire clay, and sprayed with the anti-oxidation coating after being dried at room temperature, so that the prepared combined integral composite stopper rod is used in a steel mill for 65 hours and is used for 51 hours, and in the using process, the slag line part of the stopper rod has good erosion resistance and the phenomenon of rod breakage does not occur.
Example 7
The slag line reinforcing sleeve 4 is made of aluminum carbon and is composed of the following raw materials in parts by weight: 85 parts of white corundum, 10 parts of graphite, 5 parts of metal silicon powder and 15 parts of phenolic resin. The raw materials are weighed according to a proportion, uniformly mixed, molded by machine pressing, dried in the atmosphere at the temperature of 200 ℃ to obtain the slag line reinforcing sleeve 4 with the thickness of 25mm and the height of 250mm, then embedded on the outer wall of the corresponding rod body 3 by using fire clay, and sprayed with the anti-oxidation coating after being dried at room temperature, so that the prepared combined integral composite stopper rod is used in a steel mill for 65 hours and is used for 51 hours, and in the using process, the slag line part of the stopper rod has good erosion resistance and the phenomenon of rod breakage does not occur.
Example 8
The slag line reinforcing sleeve 4 is made of zirconium carbon and comprises the following raw materials in parts by weight: 70 parts of electrofusion-stabilized zirconia, 25 parts of graphite, 4 parts of metal silicon powder, 1 part of boron carbide and 15 parts of phenolic resin. The raw materials are weighed according to a proportion, uniformly mixed, molded by machine pressing, dried in the atmosphere at the temperature of 200 ℃ to obtain a slag line reinforcing sleeve 4 with the thickness of 10mm and the height of 250mm, then embedded on the outer wall of the corresponding rod body 3 by using fire clay, and sprayed with an anti-oxidation coating after being dried at room temperature, so that the prepared combined integral composite stopper rod is used in a certain steel mill for 50 hours, and the combined integral composite stopper rod has good erosion resistance of the slag line part of the stopper rod and does not have the phenomenon of rod breakage in the use process.
Example 9
The slag line reinforcing sleeve 4 is made of magnesium carbon and is composed of the following raw materials in parts by weight: 85 parts of sintered magnesia, 10 parts of graphite, 5 parts of silicon carbide powder and 15 parts of phenolic resin. The raw materials are weighed according to a proportion, uniformly mixed, molded by machine pressing, dried in the atmosphere at the temperature of 180 ℃ to obtain the slag line reinforcing sleeve 4 with the thickness of 30mm and the height of 250mm, then embedded on the outer wall of the corresponding rod body 3 by using fire clay, and sprayed with the anti-oxidation coating after being dried at room temperature, so that the prepared combined integral composite stopper rod is used in a steel mill for 65 hours and is used for 51 hours, and in the using process, the slag line part of the stopper rod has good erosion resistance and the phenomenon of rod breakage does not occur.
Example 10
The slag line reinforcing sleeve 4 is made of spinel and is composed of the following raw materials in parts by weight: 70 parts of fused spinel, 25 parts of graphite, 4 parts of metal silicon powder, 1 part of boron carbide and 15 parts of phenolic resin. The raw materials are weighed according to a proportion, uniformly mixed, molded by machine pressing, dried in the atmosphere at the temperature of 180 ℃ to obtain a slag line reinforcing sleeve 4 with the thickness of 30mm and the height of 200mm, then embedded on the outer wall of the corresponding rod body 3 by using fire clay, and sprayed with an anti-oxidation coating after being dried at room temperature, so that the prepared combined integral composite stopper rod is used in a steel mill for 65 hours and is used for 51 hours, and in the using process, the slag line part of the stopper rod has good erosion resistance and the phenomenon of rod breakage does not occur.
Example 11
The slag line reinforcing sleeve 4 is made of aluminum carbon and is composed of the following raw materials in parts by weight: 70 parts of brown corundum, 25 parts of graphite, 2 parts of metal silicon powder, 3 parts of silicon carbide powder and 15 parts of phenolic resin. The raw materials are weighed according to a proportion, evenly mixed, molded by machine pressing, dried in the atmosphere with the temperature of 180 ℃ to obtain the slag line reinforcing sleeve 4 with the thickness of 10mm and the height of 500mm, then embedded on the outer wall of the corresponding rod body 3 by using fire clay, and sprayed with the anti-oxidation coating after being dried at room temperature, and the manufactured combined integral composite stopper rod is used in a certain steel factory for 48 hours, and has good corrosion resistance and no rod breakage phenomenon in the use process.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The combined integral composite stopper rod is characterized by comprising a rod head (1), a transition section (2) and a rod body (3);
one end of the rod body (3) is fixedly connected with the rod head (1) through the transition section (2), and the other end of the rod body is provided with an inlet hole (7);
the outer circumferential wall of the rod body (3) is provided with a slag line reinforcing sleeve (4), and the slag line reinforcing sleeve (4) is embedded in the outer wall of the rod body (3) through fire clay;
an inner cavity (5) is arranged at the inner axis of the composite stopper rod; a silk block (6) is arranged at the position 50-100mm away from one end of the rod head (1) of the inner cavity (5); the silk block (6) is fixed on the outer circumferential wall of the inner cavity (5).
2. A composite integral stopper rod as claimed in claim 1 wherein the slag line reinforcement sleeve (4) has a thickness of 10-30mm and a height of 200-500 mm.
3. A combined integral composite stopper rod according to claim 1 wherein the distance between the end of the slag line reinforcing sleeve (4) remote from the rod head (1) and the end of the rod body (3) remote from the rod head (1) is h1, the height of the slag line reinforcing sleeve (4) is h2, the height of h 1: h2 is 1-3: 1-2.
4. A composite integral stopper rod according to claim 1, wherein the tip (1) is one of a magnesium carbon material, a spinel material or an aluminum carbon material, the transition section (2) is a spinel material or an aluminum carbon material, the body (3) is an aluminum carbon material, and the slag line reinforcement sleeve (4) is one of an aluminum carbon material, a spinel material, a magnesium carbon material or a zirconium carbon material.
5. A combined integral composite stopper rod as claimed in claim 4, wherein the slag line reinforcing sleeve (4) made of aluminum carbon material is composed of the following raw materials in parts by weight: 70-85 parts of white corundum or brown corundum, 10-25 parts of graphite, 2-5 parts of additive and 10-15 parts of binding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the binding agent is phenolic resin.
6. A combined integral composite stopper rod as claimed in claim 4, wherein the spinel slag line reinforcing sheath (4) is composed of the following raw materials in parts by weight: 70-85 parts of sintered or fused spinel, 10-25 parts of graphite, 2-5 parts of additive and 10-15 parts of bonding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the binding agent is phenolic resin.
7. The combined integral composite stopper rod as claimed in claim 4, wherein the slag line reinforcing sleeve (4) made of magnesium carbon is composed of the following raw materials in parts by weight: 70-85 parts of sintered or fused magnesia, 10-25 parts of graphite, 2-5 parts of an additive and 10-15 parts of a bonding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the binding agent is phenolic resin.
8. A combined integral composite stopper rod as claimed in claim 4, wherein said slag line reinforcing sheath (4) of zirconium carbon material is composed of the following raw materials in parts by weight: 70-85 parts of electric melting stable zirconia, 10-25 parts of graphite, 2-5 parts of an additive and 10-15 parts of a bonding agent; the additive is selected from one or more of metal silicon powder, silicon carbide powder and boron carbide; the binding agent is phenolic resin.
9. A method for preparing a combined integral composite stopper rod as claimed in any one of claims 1 to 8, wherein the slag line reinforcing sleeve (4) is embedded in the outer wall of the rod body (3) through fire clay, dried and sprayed with an anti-oxidation coating to obtain the combined integral composite stopper rod.
10. The method for preparing the combined integral composite stopper rod as claimed in claim 9, wherein the forming method of the slag line reinforcing sleeve (4) is isostatic pressing or mechanical pressing;
the isostatic compaction step comprises the following steps: weighing raw materials according to a proportion, uniformly mixing, granulating, drying, carrying out isostatic pressing, and calcining at the temperature of 900-1100 ℃ in a non-oxidizing atmosphere to obtain a slag line reinforcing sleeve (4);
the machine pressing molding step is as follows: weighing the raw materials in proportion, uniformly mixing, molding by mechanical pressing, and drying in an atmosphere with the temperature of 180-.
CN202110137864.8A 2021-02-01 2021-02-01 Combined integral composite stopper rod and preparation method thereof Pending CN112775423A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115403374A (en) * 2022-08-25 2022-11-29 淄博龙程耐火材料有限公司 Plug rod capable of preventing flocculation and blocking and processing technology thereof
CN117430413A (en) * 2023-12-20 2024-01-23 山西昊业新材料开发有限公司 Stopper rod for continuous casting and preparation method thereof
CN117753957A (en) * 2023-11-29 2024-03-26 浙江铁狮高温材料有限公司 Stopper rod and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115403374A (en) * 2022-08-25 2022-11-29 淄博龙程耐火材料有限公司 Plug rod capable of preventing flocculation and blocking and processing technology thereof
CN115403374B (en) * 2022-08-25 2023-04-07 淄博龙程耐火材料有限公司 Plug rod capable of preventing flocculation and blocking and processing technology thereof
CN117753957A (en) * 2023-11-29 2024-03-26 浙江铁狮高温材料有限公司 Stopper rod and preparation method thereof
CN117430413A (en) * 2023-12-20 2024-01-23 山西昊业新材料开发有限公司 Stopper rod for continuous casting and preparation method thereof
CN117430413B (en) * 2023-12-20 2024-03-12 山西昊业新材料开发有限公司 Stopper rod for continuous casting and preparation method thereof

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