CN113560559A - Preparation method of long-life submerged nozzle and long-life submerged nozzle - Google Patents

Preparation method of long-life submerged nozzle and long-life submerged nozzle Download PDF

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Publication number
CN113560559A
CN113560559A CN202111132460.6A CN202111132460A CN113560559A CN 113560559 A CN113560559 A CN 113560559A CN 202111132460 A CN202111132460 A CN 202111132460A CN 113560559 A CN113560559 A CN 113560559A
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China
Prior art keywords
layer
slag line
life
resistance wire
long
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CN202111132460.6A
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CN113560559B (en
Inventor
颜浩
王团收
李健
张盛
赵伟
邓伟
任林
刘靖轩
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Rizhao lier high temperature New Material Co.,Ltd.
Rizhao Ruihua New Material Technology Co.,Ltd.
Beijing Lier High Temperature Materials Co Ltd
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Beijing Lier High Temperature Materials Co Ltd
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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
    • B22D41/50—Pouring-nozzles
    • B22D41/52—Manufacturing or repairing thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
    • B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
    • B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon

Abstract

The invention relates to a preparation method of a long-life submerged nozzle and the long-life submerged nozzle, which comprises the following preparation steps: performing cold isostatic pressing prefabrication molding on part of the body material and the slag line material to obtain a to-be-processed piece comprising a body layer and a slag line layer; wrapping a layer of paraffin wax sheet on the outer surface of the joint of a body layer and a slag line layer of a piece to be processed, winding a resistance wire outside the paraffin wax sheet on the slag line layer to obtain a prefabricated piece, putting the prefabricated piece into a mold, correspondingly putting the rest body material and the rest breathable layer material into the mold, covering the resistance wire with the breathable layer material, and drying to obtain a prefabricated piece with the breathable layer; forming a through hole communicated with a paraffin sheet on an outer body layer of the preformed piece, firing, and mounting an argon blowing nozzle and a power line communicated with a resistance wire at the through hole to obtain an immersion type water gap; the obtained submerged nozzle is not eroded by the crystallizer casting powder, and the service life is long.

Description

Preparation method of long-life submerged nozzle and long-life submerged nozzle
Technical Field
The invention relates to the technical field of long nozzles, in particular to a preparation method of a long-life submerged nozzle and the long-life submerged nozzle.
Background
The submerged nozzle mainly plays a role in connecting the tundish and the crystallizer, and the molten steel in the tundish is drained into the crystallizer through the inner cavity of the submerged nozzle, so that the molten steel forms a stable flow field and a stable temperature field in the crystallizer. In the normal use process, the part of the slag line of the submerged nozzle inserted into the crystallizer is partially covered by the crystallizer protecting slag, and is continuously corroded by the protection of the crystallizer in the steel casting process. The biggest factor limiting the service life is that the slag line is partially inserted into the crystallizer and is continuously eroded by the mold flux, and finally the slag line is off-line due to severe erosion.
Therefore, in view of the above problems, the present invention is directed to a method for manufacturing a long-life submerged nozzle and a long-life submerged nozzle.
Disclosure of Invention
The invention aims to provide a preparation method of a long-service-life submerged nozzle and the long-service-life submerged nozzle, and the technical problem that in the prior art, a slag line part is inserted into a crystallizer and is continuously eroded by crystallizer protective slag, and finally, the slag line is off-line due to severe erosion is solved through the structural design of the long-service-life submerged nozzle.
The invention provides a preparation method of a long-life submerged nozzle, which comprises the following preparation steps:
performing cold isostatic pressing prefabrication molding on part of the body material and the slag line material to obtain a to-be-processed piece comprising a body layer and a slag line layer;
wrapping a paraffin wax sheet on the outer surface of the joint of the body layer and the slag line layer of the piece to be processed, and winding a resistance wire outside the paraffin wax sheet on the slag line layer to obtain a prefabricated piece;
putting the prefabricated member into a mold, correspondingly putting the rest of the body material and the air-permeable layer material into the mold, covering the resistance wire with the air-permeable layer material, and drying to obtain a prefabricated member with an air-permeable layer;
forming a through hole communicated with a paraffin sheet on an outer body layer of the preformed piece, firing, and mounting an argon blowing nozzle and a power line communicated with a resistance wire at the through hole to obtain an immersion type water gap;
wherein, the air permeable layer material comprises 7 to 10 parts of +199 graphite, 89 to 105 parts of zirconia, 0.1 to 1 part of 98 metal silicon powder, 0.1 to 1 part of boron carbide with the grain diameter of 325 meshes, 7 to 12 parts of additional thermosetting liquid resin and 1 to 5 parts of phenolic resin powder according to the parts by weight.
Preferably, the zirconia comprises 36-55 parts of zirconia with the grain diameter of 20 meshes, 20-25 parts of zirconia with the grain diameter of 40 meshes, 8-15 parts of zirconia with the grain diameter of 100 meshes and 5-10 parts of zirconia with the grain diameter of 200 meshes; the particle size of 98 metal silicon powder is 325 meshes; the particle size of the boron carbide is 325 meshes.
Preferably, the thickness of the breathable layer is 5mm-15 mm.
Preferably, the thickness of the paraffin plate is 2-5mm, and the width of the paraffin plate is 10-20 mm; the diameter of the resistance wire is 0.5-2 mm.
Preferably, when part of the bulk material and the slag line material are preformed and molded by cold isostatic pressing, the pressure is 20-40 MPa.
Preferably, the height of the winding of the resistance wire is more than or equal to 30 mm.
Preferably, the inner diameter of the through-hole is 5-10 mm.
Preferably, the apparent porosity of the air-permeable layer is more than or equal to 25 percent.
The invention also provides a long-life submerged nozzle obtained based on the preparation method of the long-life submerged nozzle.
Preferably, including body layer and slag line layer, the outer parcel of slag line layer has ventilative layer, is equipped with the passageway between ventilative layer and the slag line layer, and the passageway upwards extends to the body layer, is equipped with the through-hole with the passageway intercommunication on the body layer outer wall, still is equipped with the resistance wire in the passageway between ventilative layer and the slag line layer, and the resistance wire twines in slag line layer outer wall.
Compared with the prior art, the preparation method of the long-life submerged nozzle and the long-life submerged nozzle provided by the invention have the following advantages:
1. according to the preparation method of the long-life submerged nozzle, the air permeability is improved through the design of the air permeable layer, meanwhile, heat is rapidly transmitted outwards, the heating purpose is achieved, the submerged nozzle slag line part can be prevented from being in contact with the crystallizer protection slag, the resistance wire continuously provides temperature for the molten steel around the submerged nozzle slag line in the electrified state, the phenomenon that the molten steel around the submerged nozzle is solidified due to the fact that the temperature is too low is effectively avoided, the submerged nozzle slag line part is not corroded by the crystallizer protection slag, and the service life of the submerged nozzle is prolonged; argon blown out from the slag line part uniformly covers the periphery of the water gap and the molten steel surface of the crystallizer, so that the oxidation of the molten steel is avoided.
2. The preparation method of the long-life submerged nozzle and the long-life submerged nozzle, which are disclosed by the invention, have the advantages that the service life is prolonged, the frequency of replacing the submerged nozzle is reduced, the problem of embryo waste caused by replacing the submerged nozzle is reduced, the labor intensity of operators is reduced, and the energy consumption of baking the submerged nozzle each time is reduced.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view illustrating a method for manufacturing a long-life submerged entry nozzle according to the present invention;
fig. 2 is an enlarged view of a point a in fig. 1.
Description of reference numerals:
1. a body layer; 2. a slag line layer; 3. a resistance wire; 4. a through hole; 5. a breathable layer; 6. an argon blowing nozzle; 7. a power line; 8. a channel.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 and fig. 2, the present embodiment provides a method for preparing a long-life submerged nozzle, which includes the following steps:
s1) performing cold isostatic pressing prefabrication and molding on part of the body material and the slag line material to obtain a to-be-processed piece comprising a body layer 1 and a slag line layer 2;
s2) wrapping a layer of paraffin wax sheet on the outer surface of the joint of the body layer 1 and the slag line layer 2 of the workpiece to be processed, and winding the resistance wire 3 outside the paraffin wax sheet on the slag line layer 2 to obtain a prefabricated member;
s3) putting the prefabricated member into a mold, correspondingly putting the rest of the body material and the air-permeable layer material into the mold, covering the resistance wire 3 with the air-permeable layer material, and drying to obtain a preformed member with an air-permeable layer 5;
s4) forming a through hole 4 communicated with a paraffin plate on the outer body layer 1 of the preformed piece, firing, and then installing an argon blowing nozzle 6 and a power line 7 communicated with a resistance wire on the through hole 4 to obtain an immersion nozzle;
wherein, the air permeable layer material comprises 7 to 10 parts of +199 graphite, 89 to 105 parts of zirconia, 0.1 to 1 part of 98 metal silicon powder, 0.1 to 1 part of boron carbide with the grain diameter of 325 meshes, 7 to 12 parts of additional thermosetting liquid resin and 1 to 5 parts of phenolic resin powder according to the parts by weight.
Specifically, the zirconia comprises 36-55 parts of zirconia with the grain diameter of 20 meshes, 20-25 parts of zirconia with the grain diameter of 40 meshes, 8-15 parts of zirconia with the grain diameter of 100 meshes and 5-10 parts of zirconia with the grain diameter of 200 meshes; the particle size of 98 metal silicon powder is 325 meshes; the particle size of the boron carbide is 325 meshes.
Specifically, the thickness of the air-permeable layer 5 is 5mm to 15 mm.
Specifically, the thickness of the paraffin slice is 2-5mm, and the width of the paraffin slice is 10-20 mm; the diameter of the resistance wire 3 is 0.5-2 mm.
Specifically, when part of the body material and the slag line material are preformed and molded by cold isostatic pressing, the pressure is 20-40 MPa.
Specifically, the winding height of the resistance wire 3 is more than or equal to 30 mm.
Specifically, the inner diameter of the through-hole 4 is 5 to 10 mm.
Specifically, the apparent porosity of the air-permeable layer 5 is not less than 25%.
The invention also provides a long-life submerged nozzle obtained based on the preparation method of the long-life submerged nozzle.
Specifically, including body layer 1 and slag line layer 2, the outer parcel in slag line layer 2 has ventilative layer 5, is equipped with passageway 8 between ventilative layer 5 and slag line layer 2, and passageway 8 upwards extends to body layer 1, is equipped with the through-hole 4 with the 8 intercommunication of passageway on the 1 outer wall of body layer, still is equipped with resistance wire 3 in the passageway 8 between ventilative layer 5 and slag line layer 2, and resistance wire 3 twines in 2 outer walls on slag line layer.
The preparation method of the long-life submerged nozzle provided by the invention improves the air permeability, simultaneously and quickly transfers heat outwards to realize the purpose of heating, can avoid the contact of the submerged nozzle slag line part and the crystallizer protecting slag, and the resistance wire continuously provides temperature for the molten steel around the submerged nozzle slag line in the electrified state, thereby effectively avoiding the phenomenon that the molten steel around the submerged nozzle is solidified due to the over-low temperature, so that the submerged nozzle slag line part is not eroded by the crystallizer protecting slag, and the service life of the submerged nozzle is prolonged; argon blown out from the slag line part uniformly covers the periphery of the water gap and the molten steel surface of the crystallizer, so that the oxidation of the molten steel is avoided.
The preparation method of the long-life submerged nozzle and the long-life submerged nozzle, which are disclosed by the invention, have the advantages that the service life is prolonged, the frequency of replacing the submerged nozzle is reduced, the problem of embryo waste caused by replacing the submerged nozzle is reduced, the labor intensity of operators is reduced, and the energy consumption of baking the submerged nozzle each time is reduced.
Example one
The embodiment provides a preparation method of a long-service-life submerged nozzle, which comprises the following preparation steps:
101) performing cold isostatic pressing on part of the body material and the slag line material to obtain a to-be-processed piece comprising a body layer 1 and a slag line layer 2, wherein the pressure is 30 MPa;
102) wrapping a layer of paraffin wax sheet on the outer surface of the joint of the body layer 1 and the slag line layer 2 of the piece to be processed, and winding a resistance wire 3 outside the paraffin wax sheet on the slag line layer 2 to obtain a prefabricated piece;
103) putting the prefabricated member into a mold, correspondingly putting the rest of the body material and the air-permeable layer material into the mold, covering the resistance wire 3 with the air-permeable layer material, and drying to obtain a prefabricated member with an air-permeable layer 5, wherein the drying temperature is 220 ℃ and the drying time is 24 hours;
104) the method comprises the steps of forming a through hole 4 communicated with a paraffin plate in an outer body layer 1 of a preformed piece, conducting firing treatment, wherein the firing temperature is 950 ℃, the firing time is 22 hours, installing an argon blowing nozzle 6 and a power line 7 communicated with a resistance wire in the through hole 4 after firing, and obtaining an immersion type water gap, wherein the firing temperature is 950 ℃, and the firing time is 22 hours;
the breathable layer material comprises, by weight, 9 parts of +199 graphite, 90 parts of zirconia, 0.5 part of 98 metal silicon powder, 0.5 part of 325-mesh boron carbide, 10 parts of additional thermosetting liquid resin and 2 parts of phenolic resin powder.
Specifically, 45% by weight of zirconia having a particle size of 20 mesh, 22% by weight of zirconia having a particle size of 40 mesh, 14% by weight of zirconia having a particle size of 100 mesh, and 9% by weight of zirconia having a particle size of 200 mesh; the particle size of the boron carbide is 325 meshes.
Specifically, the thickness of the air-permeable layer 5 is 10 mm.
Specifically, the thickness of the paraffin plate is 2mm, and the width of the paraffin plate is 10 mm; the diameter of the resistance wire 3 is 1.5 mm.
Specifically, when part of the body material and the slag line material are preformed and molded by cold isostatic pressing, the pressure is 30 MPa.
Specifically, the height of winding of the resistance wire 3 is 35 mm.
Specifically, the inner diameter of the through-hole 4 is 10 mm.
The immersion nozzle who obtains, including body layer 1 and slag line layer 2, the outer parcel of slag line layer 2 has ventilative layer 5, is equipped with passageway 8 between ventilative layer 5 and slag line layer 2, and passageway 8 upwards extends to body layer 1, is equipped with the through-hole 4 with the 8 intercommunication of passageway on the 1 outer wall of body layer, still is equipped with resistance wire 3 in the passageway 8 between ventilative layer 5 and slag line layer 2, and resistance wire 3 twines in 2 outer walls on slag line layer.
Under the conditions that the pressure of argon is 2.4MPa and the flow is 5NL/min, the air permeability of the air permeable layer 5 is good, the porosity of the air permeable material is 26%, the temperature of the resistance wire is increased quickly, heat can be quickly transferred to the air permeable material, the heat is transferred to the outside by the air permeable material, and the purpose of final heating is achieved.
Example two
The embodiment provides a preparation method of a long-service-life submerged nozzle, which comprises the following preparation steps:
201) performing cold isostatic pressing on part of the body material and the slag line material to obtain a to-be-processed piece comprising a body layer 1 and a slag line layer 2, wherein the pressure is 30 MPa;
202) wrapping a layer of paraffin wax sheet on the outer surface of the joint of the body layer 1 and the slag line layer 2 of the piece to be processed, and winding a resistance wire 3 outside the paraffin wax sheet on the slag line layer 2 to obtain a prefabricated piece;
203) putting the prefabricated member into a mold, correspondingly putting the rest of the body material and the air-permeable layer material into the mold, covering the resistance wire 3 with the air-permeable layer material, and drying to obtain a prefabricated member with an air-permeable layer 5, wherein the drying temperature is 220 ℃ and the drying time is 24 hours;
204) the method comprises the steps of forming a through hole 4 communicated with a paraffin plate in an outer body layer 1 of a preformed piece, conducting firing treatment, wherein the firing temperature is 950 ℃, the firing time is 22 hours, installing an argon blowing nozzle 6 and a power line 7 communicated with a resistance wire in the through hole 4 after firing, and obtaining an immersion type water gap, wherein the firing temperature is 950 ℃, and the firing time is 22 hours;
the breathable layer material comprises, by weight, 10 parts of +199 graphite, 89 parts of zirconia, 0.5 part of 98 metal silicon powder, 0.5 part of 325-mesh boron carbide, 12 parts of additional thermosetting liquid resin and 3 parts of phenolic resin powder.
Specifically, 45% by weight of zirconia having a particle size of 20 mesh, 20% by weight of zirconia having a particle size of 40 mesh, 15% by weight of zirconia having a particle size of 100 mesh, and 9% by weight of zirconia having a particle size of 200 mesh; the particle size of the boron carbide is 325 meshes.
Specifically, the thickness of the air-permeable layer 5 is 10 mm.
Specifically, the thickness of the paraffin plate is 2mm, and the width of the paraffin plate is 10 mm; the diameter of the resistance wire 3 is 1.5 mm.
Specifically, when part of the body material and the slag line material are preformed and molded by cold isostatic pressing, the pressure is 30 MPa.
Specifically, the height of winding of the resistance wire 3 is 35 mm.
Specifically, the inner diameter of the through-hole 4 is 10 mm.
The immersion nozzle who obtains, including body layer 1 and slag line layer 2, the outer parcel of slag line layer 2 has ventilative layer 5, is equipped with passageway 8 between ventilative layer 5 and slag line layer 2, and passageway 8 upwards extends to body layer 1, is equipped with the through-hole 4 with the 8 intercommunication of passageway on the 1 outer wall of body layer, still is equipped with resistance wire 3 in the passageway 8 between ventilative layer 5 and slag line layer 2, and resistance wire 3 twines in 2 outer walls on slag line layer.
Under the argon pressure of 2.4MPa and the flow of 5NL/min, the air permeability of the air permeable layer 5 is good, the porosity is 26.7%, the resistance wire is heated quickly, heat can be quickly transferred to the air permeable material, and the air permeable material transfers the heat to the outside, so that the purpose of final heating is achieved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A preparation method of a long-service-life submerged nozzle is characterized by comprising the following steps: the preparation method comprises the following preparation steps:
performing cold isostatic pressing prefabrication molding on part of the body material and the slag line material to obtain a to-be-processed part comprising a body layer (1) and a slag line layer (2);
wrapping a paraffin slice on the outer surface of the joint of the body layer (1) and the slag line layer (2) of the piece to be processed, and winding a resistance wire (3) outside the paraffin slice on the slag line layer (2) to obtain a prefabricated piece;
putting the prefabricated member into a mold, correspondingly putting the rest body material and the rest breathable layer material into the mold, covering the resistance wire (3) with the breathable layer material, and drying to obtain a prefabricated member with a breathable layer (5);
a through hole (4) communicated with a paraffin plate is formed in an outer body layer (1) of the preformed piece, the preformed piece is subjected to firing treatment, and an argon blowing nozzle (6) and a power line (7) communicated with a resistance wire are installed at the through hole (4) after the firing treatment, so that an immersion type water gap is obtained;
wherein, the air permeable layer material comprises 7 to 10 parts of +199 graphite, 89 to 105 parts of zirconia, 0.1 to 1 part of 98 metal silicon powder, 0.1 to 1 part of boron carbide with the grain diameter of 325 meshes, 7 to 12 parts of additional thermosetting liquid resin and 1 to 5 parts of phenolic resin powder according to the parts by weight.
2. The method of making a long life submerged entry nozzle of claim 1, wherein: the zirconia comprises 36-55 parts of zirconia with the grain diameter of 20 meshes, 20-25 parts of zirconia with the grain diameter of 40 meshes, 8-15 parts of zirconia with the grain diameter of 100 meshes and 5-10 parts of zirconia with the grain diameter of 200 meshes; the particle size of 98 metal silicon powder is 325 meshes; the particle size of the boron carbide is 325 meshes.
3. The method of making a long life submerged entry nozzle of claim 1, wherein: the thickness of the air-permeable layer (5) is 5mm-15 mm.
4. The method of making a long life submerged entry nozzle of claim 1, wherein: the thickness of the paraffin plate is 2-5mm, and the width of the paraffin plate is 10-20 mm; the diameter of the resistance wire (3) is 0.5-2 mm.
5. The method of making a long life submerged entry nozzle of claim 1, wherein: and when part of the body material and the slag line material are preformed and molded by cold isostatic pressing, the pressure is 20-40 MPa.
6. The method of making a long life submerged entry nozzle of claim 1, wherein: the height of the winding of the resistance wire (3) is more than or equal to 30 mm.
7. The method of making a long life submerged entry nozzle of claim 1, wherein: the inner diameter of the through hole (4) is 5-10 mm.
8. The method of making a long life submerged entry nozzle of claim 1, wherein: the apparent porosity of the air-permeable layer (5) is more than or equal to 25 percent.
9. A long-life submerged entry nozzle obtained based on the method for manufacturing a long-life submerged entry nozzle as claimed in any one of claims 1 to 8.
10. The long life submerged entry nozzle of claim 9, wherein: including body layer (1) and slag line layer (2), the outer parcel of slag line layer (2) has ventilative layer (5), be equipped with passageway (8) between ventilative layer (5) and slag line layer (2), passageway (8) upwards extend to body layer (1), be equipped with on body layer (1) outer wall through-hole (4) with passageway (8) intercommunication, still be equipped with resistance wire (3) in passageway (8) between ventilative layer (5) and slag line layer (2), winding in slag line layer (2) outer wall resistance wire (3).
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CN110156462A (en) * 2019-05-31 2019-08-23 鞍山市和丰耐火材料有限公司 The smelting stainless steel submersed nozzle and its production method of resistant to corrosion long-life
CN210254225U (en) * 2019-07-10 2020-04-07 山西通才工贸有限公司 Immersion type water gap

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1536902A1 (en) * 2002-09-03 2005-06-08 Vesuvius Crucible Company Gas purged nozzle
CN101474671A (en) * 2009-01-19 2009-07-08 马鞍山市益江高温陶瓷制造有限公司 Spinelle ventilated tundish filling pipe end and method for producing the same
CN102503461A (en) * 2011-10-21 2012-06-20 山东东耐高温材料股份有限公司 Submerged argon blowing nozzle for continuously casting metals and preparation method thereof
CN103008588A (en) * 2013-01-09 2013-04-03 河北联合大学 Nozzle slag line erosion resistant device and method for protecting pouring by using same
CN108284217A (en) * 2018-03-05 2018-07-17 北京利尔高温材料股份有限公司 A kind of stopper and preparation method thereof of continuous casting purification molten steel effect
CN109732071A (en) * 2019-01-24 2019-05-10 北京利尔高温材料股份有限公司 A kind of stopper with anti-crusting heat insulation function
CN110156462A (en) * 2019-05-31 2019-08-23 鞍山市和丰耐火材料有限公司 The smelting stainless steel submersed nozzle and its production method of resistant to corrosion long-life
CN210254225U (en) * 2019-07-10 2020-04-07 山西通才工贸有限公司 Immersion type water gap

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