CN204686008U - A kind of continuous casting dispersivity Argon stopper - Google Patents
A kind of continuous casting dispersivity Argon stopper Download PDFInfo
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- CN204686008U CN204686008U CN201520241089.0U CN201520241089U CN204686008U CN 204686008 U CN204686008 U CN 204686008U CN 201520241089 U CN201520241089 U CN 201520241089U CN 204686008 U CN204686008 U CN 204686008U
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- stopper
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Abstract
The utility model relates to a kind of continuous casting dispersivity Argon stopper and manufacture method thereof, stopper comprises stopper body and is fixed on the stopper head of stopper body front end, the ar gas passage towards stopper head is provided with in stopper body, stopper head adopts porous material to make, and argon gas is blown in molten steel through porous material dispersivity.Compared with prior art, the beneficial effects of the utility model are: 1) stopper head does not establish gas port, but are blown into argon gas by the larger porous material dispersivity of apparent porosity, and the uniformity that argon gas is blown into is good, the impurity be deposited on stopper head can be disposed, improve flow control precision; 2) compared with conventional stopper, avoid the impact of concentrating the air pocket being blown into argon gas formation to fluctuate on mould liquid level, improve Argon effect.
Description
Technical field
The utility model relates to a kind of continuous casting stopper, particularly relates to a kind of continuous casting dispersivity Argon stopper.
Background technology
Stopper is contained in the fire proofed wood charge bar by lifting Bit andits control mouth of a river opening and closing and molten steel flow in tundish, and become with stopper head group by stopper body, upper end connects by the transverse arm of bolt and elevating mechanism, and lower end is connected with stopper brick by screw thread or pin, intermediate sleeve sleeve brick.Stopper is the critical function refractory material during continuous casting steel machine is produced, it coordinates with tundish upper nozzle, control the steel stream in from tundish to crystallizer, argon gas is blown into ladle canal by stopper, prevent in passage due to the blocking of field trash deposition, improve steel quality, maintain normally carrying out of continuous casting production.
The Argon type stopper generally used at present is divided into single-orifice type Argon stopper (as shown in Figure 1) and porous type Argon stopper (as shown in Figure 2) by version, namely on stopper head 1, have the gas port that quantity does not wait, these gas ports are connected with the ar gas passage 3 in stopper body 2.In use, the argon gas be blown into by gas port is more concentrated, in molten steel, easily form air pocket, causes mould liquid level to fluctuate; In addition, impurity in molten steel is easily deposited on stopper head surface affects stopper head flow control precision, and the argon gas skewness that current single hole or porous type stopper are blown into by gas port, in spot distribution, cannot effectively the floccule being deposited on stopper head surface be cleaned out.
Summary of the invention
The utility model provides a kind of continuous casting dispersivity Argon stopper, stopper head does not establish gas port, but be blown into argon gas by the larger porous material dispersivity of apparent porosity, the uniformity that argon gas is blown into is good, can effectively dispose the impurity be deposited on stopper head, improve flow control precision, reduce the impact of concentrating the air pocket being blown into argon gas formation to fluctuate on mould liquid level simultaneously, promote Argon effect.
In order to achieve the above object, the utility model realizes by the following technical solutions:
A kind of continuous casting dispersivity Argon stopper, comprises stopper body and the stopper head being fixed on stopper body front end, is provided with the ar gas passage towards stopper head in stopper body, and described stopper head adopts porous material to make.
The apparent porosity of described porous material is greater than 20%.
Compared with prior art, the beneficial effects of the utility model are:
1) in the utility model, stopper head does not establish gas port, but is blown into argon gas by the larger porous material dispersivity of apparent porosity, and the uniformity that argon gas is blown into is good, can effectively dispose the impurity be deposited on stopper head, improves flow control precision;
2) compared with the conventional stopper with Argon pore, avoid the impact of concentrating the air pocket being blown into argon gas formation to fluctuate on mould liquid level, improve Argon effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing single-orifice type Argon stopper.
Fig. 2 is the structural representation of existing porous type Argon stopper.
Fig. 3 is the structural representation of dispersivity Argon stopper described in the utility model.
In figure: 1. stopper head 2. stopper body 3. ar gas passage 4. gas port
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described further:
See Fig. 3, it is the structural representation of continuous casting dispersivity Argon stopper described in the utility model, a kind of continuous casting dispersivity Argon stopper of the utility model, comprise stopper body 2 and the stopper head 1 being fixed on stopper body 2 front end, the ar gas passage 3 towards stopper head 1 is provided with in stopper body 2, described stopper head 1 adopts porous material to make, and argon gas is blown in molten steel through porous material dispersivity.
The apparent porosity of described porous material is greater than 20%.
For stopper head porous material by following compositions by weight ratio form: crystalline flake graphite 5 ~ 20 parts, 65 ~ 85 parts, corundum, additive 0.5 ~ 10 part, burn lose agent 0.5 ~ 10 part; The phenolic resins of additional above-mentioned composition gross weight 4 ~ 12%.Additive can be one, two or more any combination in metallic silicon power, Al-Mg alloy powder, boron carbide.
The manufacture method of a kind of continuous casting of the utility model dispersivity Argon stopper is as follows:
1) prepare burden: according to weight ratio, each for stopper head 1 raw material is weighed up for subsequent use;
2) mix: stopper head 1 raw material is added in high-speed mixer successively, and Homogeneous phase mixing is stopper head material, drying for standby; The another mixing of technique routinely stopper rod body material is for subsequent use;
3) shaping: the stopper head material mixed and stopper rod body material are joined in mould respectively, shaping in equal pressing equipment, briquetting pressure 120 ~ 150MPa;
4) burn till: under reducing atmosphere, 1000 ~ 1200 DEG C of temperature burn till the stopper material of forming for more than 6 hours;
5) machining: the stopper material burnt till carries out turnery processing by drawing;
6) apply: the stopper outer wall brushing antioxidizing paint after machining, is final finished;
7) pack: finished product is qualified rear packaging on inspection.
The porous material that the utility model adopts the method making apparent porosity of adding burning mistake agent to be in the feed greater than 20% is used as stopper head 1, in moulded section process, the ar gas passage 3 of stopper body 2 extends in stopper head 1, stopper head 1 is not offered special gas port 4, but make argon gas be blown in molten steel by the hole dispersivity in porous material, Argon process is soft, even, can not cause the fluctuation of mould liquid level.
Following examples are implemented under premised on technical solutions of the utility model, give detailed embodiment and concrete operating process, but protection domain of the present utility model are not limited to following embodiment.In following embodiment, method therefor is conventional method if no special instructions.
[embodiment 1]
In the present embodiment stopper head 1 by following compositions by weight ratio form: crystalline flake graphite 15 parts; 80 parts, corundum; Metallic silicon power 3 parts; Burning mistake agent is starch 2 parts; The phenolic resins of additional mentioned component gross weight 12%.Stopper body 2 adopts conventional material, is not described in detail here.
The manufacture process of the present embodiment continuous casting dispersivity Argon stopper is as follows:
1) prepare burden: according to weight ratio, each for stopper head 1 raw material is weighed up for subsequent use;
2) mix: stopper head 1 raw material is added in high-speed mixer successively, and Homogeneous phase mixing is stopper head material, drying for standby; The another mixing of technique routinely stopper rod body material is for subsequent use;
3) shaping: the stopper head material mixed and stopper rod body material are joined in mould respectively, shaping in equal pressing equipment, briquetting pressure 130MPa;
4) burn till: the stopper material of forming is under carbon reducing atmosphere, and 1000 DEG C of temperature burn till for 6 hours;
5) machining: the stopper material burnt till carries out turnery processing by drawing;
6) apply: the stopper material outer wall brushing antioxidizing paint after machining, is final finished;
7) pack: finished product is qualified rear packaging on inspection.
After testing, the physical performance index of the present embodiment stopper head 1 is: apparent porosity 21.3%, bulk density 2.45g/cm
3strength at normal temperature 8.7MPa.
[embodiment 2]
In the present embodiment stopper head 1 by following compositions by weight ratio form: crystalline flake graphite 10 parts, 82 parts, corundum, boron carbide 2 parts, Al-Mg alloy powder 3 parts, burn that to lose agent be the phenolic resins of 4 parts, dextrin, additional mentioned component gross weight 9%.Stopper body 2 adopts conventional material, is not described in detail here.
The manufacture process of the present embodiment continuous casting dispersivity Argon stopper is identical with embodiment 1, and wherein in forming process, briquetting pressure is 140MPa; In sintering process under carbon reducing atmosphere, 1100 DEG C of temperature burn till for 6.5 hours.
After testing, the physical performance index of the made stopper head 1 of the present embodiment is: apparent porosity 24.3%, bulk density 2.40g/cm
3, strength at normal temperature 8.4MPa.
[embodiment 3]
In the present embodiment, stopper head 1 is made up of by weight proportion following compositions: crystalline flake graphite 5 parts, 81 parts, corundum, boron carbide 2 parts, metallic silicon power 3 parts, Al-Mg alloy powder 2 parts, burns and loses the phenolic resins that agent is polyethylene 7 parts, additional mentioned component gross weight 7%.Stopper body 2 adopts conventional material, is not described in detail here.
The manufacturing process of the present embodiment continuous casting dispersivity Argon stopper is identical with embodiment 1, and wherein in forming process, briquetting pressure is 150MPa; In sintering process under carbon reducing atmosphere, 1200 DEG C of temperature burn till for 7 hours.
After testing, the physical performance index of the made stopper head 1 of the present embodiment is: apparent porosity 25.5%, bulk density 2.32g/cm
3, strength at normal temperature 8.0MPa.
Stopper made by above 3 embodiments, through in the actual use of different steel mills, compared with the Argon stopper of routine, dispersivity Argon stopper rod flow control is stablized, and mould liquid level fluctuation is little, and user is very satisfied.
Claims (1)
1. a continuous casting dispersivity Argon stopper, comprise stopper body and the stopper head being fixed on stopper body front end, be provided with the ar gas passage towards stopper head in stopper body, it is characterized in that, described stopper head adopts porous material to make, and the apparent porosity of porous material is greater than 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520241089.0U CN204686008U (en) | 2015-04-18 | 2015-04-18 | A kind of continuous casting dispersivity Argon stopper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520241089.0U CN204686008U (en) | 2015-04-18 | 2015-04-18 | A kind of continuous casting dispersivity Argon stopper |
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| CN204686008U true CN204686008U (en) | 2015-10-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111906289A (en) * | 2020-08-27 | 2020-11-10 | 北京利尔高温材料股份有限公司 | Argon blowing stopper rod and manufacturing method thereof |
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2015
- 2015-04-18 CN CN201520241089.0U patent/CN204686008U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111906289A (en) * | 2020-08-27 | 2020-11-10 | 北京利尔高温材料股份有限公司 | Argon blowing stopper rod and manufacturing method thereof |
| CN111906289B (en) * | 2020-08-27 | 2022-04-12 | 日照利尔高温新材料有限公司 | Argon blowing stopper rod and manufacturing method thereof |
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