CN112743070A - Integral stopper rod for air curtain - Google Patents
Integral stopper rod for air curtain Download PDFInfo
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- CN112743070A CN112743070A CN202110031683.7A CN202110031683A CN112743070A CN 112743070 A CN112743070 A CN 112743070A CN 202110031683 A CN202110031683 A CN 202110031683A CN 112743070 A CN112743070 A CN 112743070A
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- rod
- argon
- head
- area
- gas
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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
- B22D41/186—Stopper-rods therefor with means for injecting a fluid into the melt
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses an air curtain integral stopper rod which comprises a rod head and a rod body, wherein the rod head is arranged at the top end of the rod body, an argon channel is formed in the rod body, the argon channel extends to the interior of the rod head, and an air curtain block is arranged at the upper end of the rod head. The invention provides an integral gas curtain stopper rod, which can continuously provide argon bubbles by means of an argon bubble gas curtain formed by a ventilation area at the top of the stopper rod, has a large action area, is more beneficial to floating and removing impurities in molten steel and improves the purity of the molten steel; argon forms the gas curtain protection at the stick head, has solved the bad condition of traditional tube beam form gas jet, has avoidd molten steel inclusion and has gathered the deposit on the stick head surface, influences the problem with the cooperation accuse stream precision of mouth of a river bowl portion.
Description
Technical Field
The invention relates to the technical field of functional fire-resistant materials for continuous casting, in particular to an air curtain integral stopper rod.
Background
Continuous casting of steel in this century has become the mainstream metallurgical casting process, and more than 90% of steel in the world is produced by continuous casting. In the continuous casting production, the integral stopper rod and the upper nozzle are matched to work, so that the flow of the molten steel is controlled, and the flow of the molten steel from the tundish to the crystallizer is adjusted. In the continuous casting production, in order to solve the problem of floating of inclusions in molten steel, a central hole is formed in the top end of a stopper rod head and is connected with the inside of the stopper rod, argon enters from the tail end of the stopper rod and is blown out through an opening of the stopper rod head, so that argon blowing is completed, and floating of inclusions is promoted.
In the actual use process, the argon blowing of the rod head is mainly completed through single-hole argon blowing, as shown in fig. 3, a central hole is formed in the center of the rod head, the central hole is communicated with an argon gas channel inside the stopper rod, and the argon gas enters the argon gas channel through the tail end of the stopper rod and is blown out through the central hole of the rod head, so that the argon blowing is completed, and the floating of inclusions is promoted. Chinese patent with application number cn201310129083.x and publication number CN104096828A discloses a porous stopper rod for continuous casting, as shown in fig. 4, a plurality of argon blowing holes are formed in the head of the stopper rod, and argon is delivered to the head through the tail and then discharged through the plurality of argon blowing holes formed in the head, so as to promote floating of inclusions, and also solve the problem that the flow control accuracy is affected by adhesion and accumulation of nodules on the head. However, in practical production applications, no matter the argon blowing structure is a single-hole argon blowing structure or a multi-hole argon blowing structure, the argon bubbles formed by blowing are bunched, the bonding and floating influence area on molten steel inclusion is small, and the purpose of bonding the molten steel inclusion by the argon bubbles and promoting the floating of the molten steel inclusion cannot be well realized.
Disclosure of Invention
The invention aims to provide an integral gas curtain stopper rod, which solves the problems that argon bubbles formed by argon blowing are bunched, the bonding and floating influence area on molten steel inclusion is small, the argon bubbles cannot fully bond the molten steel inclusion, and the floating of the molten steel inclusion is promoted.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to an air curtain integral stopper rod which comprises a rod head and a rod body, wherein the rod head is arranged at the top end of the rod body, an argon channel is formed in the rod body, the argon channel extends to the interior of the rod head, and an air curtain block is arranged at the upper end of the rod head.
Further, the air curtain block comprises a ventilation area, a combination area and an air guide hole, the top end of the air curtain block is arranged as the ventilation area, the bottom end of the ventilation area is provided with the combination area, the air guide hole is arranged in the combination area, the upper end of the air guide hole extends into the ventilation area, and the lower end of the air guide hole is communicated with the argon channel.
Still further, the cross section of the ventilation area is designed into a sector shape.
Still further, the outside of combining the district is provided with annular groove-shaped structure, just the combination district is the triangle-shaped and arranges.
Still further, the diameter of the gas guide hole is smaller than that of the argon gas channel.
Still further, the diameter of air guide hole sets up to 5 ~ 10 mm.
The method for manufacturing the integral air curtain stopper rod is characterized by comprising the following steps:
the method comprises the following steps: uniformly mixing the raw materials of the ventilation area, wherein the ventilation area is made of a dispersion hole material with through air holes, and the material is formed by mixing several materials of white corundum, tabular corundum, zirconium mullite, spinel, alumina micro powder and resin with phenolic resin;
step two: preparing the air curtain block by adopting a preforming method, adding the mixed raw material of the air-permeable area and the powder of the combining area into a designed mould, and prepressing and forming according to a pressure value which is 70-90% of a stopper rod forming pressure value to prepare the air curtain block;
step three: during charging, powder of the rod head and the rod body are placed into a forming die, then the preformed air curtain block is directly placed into the powder of the rod head, the air curtain block and the rod head are mechanically embedded together after pressing, and meanwhile, the rod head and the rod body are pressed into an integral structure.
Still further, the bonded region and the club head are both formed from an air impermeable material.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention relates to an air curtain integral stopper rod, which comprises a rod head and a rod body, wherein the rod head is arranged at the top end of the rod body, an argon channel is formed in the rod body, the argon channel extends to the interior of the rod head, and an air curtain block is arranged at the upper end of the rod head; the invention provides an integral gas curtain stopper rod, which can continuously provide argon bubbles by means of an argon bubble gas curtain formed by a ventilation area at the top of the stopper rod, has a large action area, is more beneficial to floating and removing impurities in molten steel and improves the purity of the molten steel; argon forms the gas curtain protection at the stick head, has solved the bad condition of traditional tube beam form gas jet, has avoidd molten steel inclusion and has gathered the deposit on the stick head surface, influences the problem with the cooperation accuse stream precision of mouth of a river bowl portion.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic view of an integral stopper rod for an air curtain according to the present invention;
FIG. 2 is a schematic view of the structure of the air curtain block of the present invention;
FIG. 3 is a schematic view of a prior art single hole argon blowing stopper rod argon blowing structure;
FIG. 4 is a schematic view of a prior art porous argon-blowing stopper rod argon-blowing structure;
description of reference numerals: 1. an air curtain block; 2. a rod head; 3. a barrel; 4. a breathable zone; 5. a binding region; 6. an air vent; 7. an argon gas channel.
Detailed Description
As shown in fig. 1-2, an air curtain integral stopper rod comprises a rod head 2 and a rod body 3, wherein the rod head 2 is arranged at the top end of the rod body 3, an argon gas channel 7 is arranged in the rod body 3, the argon gas channel 7 extends to the inside of the rod head 2, and an air curtain block 1 is arranged at the upper end of the rod head 2.
Specifically, as shown in fig. 2, the gas curtain block 1 includes a gas permeable area 4, a combining area 5 and gas guide holes 6, the top end of the gas curtain block 1 is set as the gas permeable area 4, the bottom end of the gas permeable area 4 is set as the combining area 5, the gas guide holes 6 are arranged in the combining area 5, the upper ends of the gas guide holes 6 extend into the gas permeable area 4, and the lower ends of the gas guide holes 6 are communicated with the argon gas channel 7.
The section of the ventilation area 4 is designed to be fan-shaped; the argon bubble air curtain formed by the air curtain block 1 at the top of the stopper rod can continuously provide argon bubbles, has a large action area, is more beneficial to floating and removing impurities in molten steel, and improves the purity of the molten steel.
The outer side of the combination area 5 is provided with an annular groove-shaped structure, and the combination area 5 is arranged in an inverted triangle shape; the air curtain block 1 is connected with the rod head 2 through a combining area 5; the combination district 5 can increase the pressure of argon gas, and the inside of combination district 5 is provided with air guide hole 6, the diameter of air guide hole 6 sets up to 5 ~ 10mm, and the diameter of air guide hole 6 is less than the diameter of argon gas passageway 7, and the argon gas enters into air guide hole 6 middling pressure increase by argon gas passageway 7, is favorable to the argon gas to get into the argon gas bubble air curtain that ventilative district 4 formed, can produce the argon gas bubble constantly.
The method for manufacturing the integral air curtain stopper rod is characterized by comprising the following steps:
the method comprises the following steps: uniformly mixing the raw materials of the breathable zone 4, wherein the breathable zone 4 is made of a dispersed hole material with through air holes, and the material is formed by mixing several materials of white corundum, tabular corundum, zirconium mullite, spinel, alumina micro powder and resin with phenolic resin;
step two: manufacturing the air curtain block 1 by adopting a preforming method, adding the mixed raw material of the air-permeable area 4 and the powder of the combining area 5 into a designed mould, and prepressing and forming according to a pressure value of 70-90% of a stopper rod forming pressure value to manufacture the air curtain block 1;
step three: during charging, powder of the rod head 2 and the rod body 3 is placed into a forming die, then the preformed air curtain block 1 is directly placed into the powder of the rod head, the air curtain block 1 and the rod head 2 are mechanically embedded together after pressing, and meanwhile, the rod head 2 and the rod body 3 are pressed into an integral structure.
In particular, the bonding zone 5 and the club head 2 are both made of a gas-impermeable material.
The using process of the invention is as follows:
firstly, argon enters an argon channel 7 in the rod body 3 through a pipeline, is transmitted into the rod head 2 along the argon channel 7, enters the air guide holes 6, enters the ventilation zone 4 through the air guide holes 6, and is emitted in an argon bubble mode after passing through the ventilation zone 4, a continuous argon bubble air curtain is formed at the top end of the rod head 2, and the emitted argon bubbles are combined with impurities to form a combined body in the flowing process of steel flow, so that the density of the combined body is far lower than that of molten steel, the floating probability of the combined body is increased, and the aim of purifying the molten steel is fulfilled.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (8)
1. The utility model provides an integral stopper rod of air curtain which characterized in that: including stick head (2) and barrel (3), stick head (2) set up the top of barrel (3), argon gas passageway (7) have been seted up to the inside of barrel (3), argon gas passageway (7) extend to the inside of stick head (2), the upper end of stick head (2) is provided with air curtain piece (1).
2. The gas curtain integral stopper rod of claim 1, wherein: the gas curtain block (1) comprises a ventilating area (4), a combining area (5) and a gas guide hole (6), the top end of the gas curtain block (1) is arranged to be the ventilating area (4), the bottom end of the ventilating area (4) is provided with the combining area (5), the inside of the combining area (5) is provided with the gas guide hole (6), the upper end of the gas guide hole (6) extends to the inside of the ventilating area (4), and the lower end of the gas guide hole (6) is communicated with the argon channel (7).
3. The gas curtain integral stopper rod of claim 2, wherein: the section of the ventilation area (4) is designed to be fan-shaped.
4. The gas curtain integral stopper rod of claim 2, wherein: the outer side of the combination area (5) is provided with an annular groove-shaped structure, and the combination area (5) is arranged in an inverted triangle manner.
5. The gas curtain integral stopper rod of claim 2, wherein: the diameter of the air guide hole (6) is smaller than that of the argon channel (7).
6. The gas curtain integral stopper rod of claim 2, wherein: the diameter of the air guide hole (6) is set to be 5-10 mm.
7. A method of making an integral air curtain stopper rod as claimed in any one of claims 1 to 6, wherein the method comprises the steps of:
the method comprises the following steps: uniformly mixing the raw materials of the ventilation zone (4), wherein the ventilation zone (4) is made of a dispersion hole material with through air holes, and the material is formed by mixing several materials of white corundum, tabular corundum, zircon mullite, spinel, alumina micropowder and resin with phenolic resin;
step two: manufacturing the air curtain block (1) by adopting a pre-forming method, adding the mixed raw material of the air permeable area (4) and the powder of the combining area (5) into a designed mould, and pre-pressing and forming according to a pressure value which is 70-90% of a stopper rod forming pressure value to manufacture the air curtain block (1);
step three: when the material is fed in a forming mode, powder of the rod head (2) and the rod body (3) is placed into a forming die, then the preformed air curtain block (1) is directly placed in the powder of the rod head, the air curtain block (1) and the rod head (2) are mechanically inlaid together after pressing, and meanwhile, the rod head (2) and the rod body (3) are pressed into an integral structure.
8. The method for making an integral air curtain stopper as claimed in claim 7, wherein: the bonding zone (5) and the club head (2) are both made of an air-impermeable material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110031683.7A CN112743070A (en) | 2021-01-11 | 2021-01-11 | Integral stopper rod for air curtain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110031683.7A CN112743070A (en) | 2021-01-11 | 2021-01-11 | Integral stopper rod for air curtain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112743070A true CN112743070A (en) | 2021-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110031683.7A Pending CN112743070A (en) | 2021-01-11 | 2021-01-11 | Integral stopper rod for air curtain |
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| Country | Link |
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| CN (1) | CN112743070A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024017662A1 (en) | 2022-07-18 | 2024-01-25 | Refractory Intellectual Property Gmbh & Co. Kg | Stopper rod and method for inducing a rotational flow of a molten metal |
| 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 |
-
2021
- 2021-01-11 CN CN202110031683.7A patent/CN112743070A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024017662A1 (en) | 2022-07-18 | 2024-01-25 | Refractory Intellectual Property Gmbh & Co. Kg | Stopper rod and method for inducing a rotational flow of a molten metal |
| 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 |
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