CN104889377A - Diffusing argon blowing stopper rod for continuous casting and manufacturing method for stopper rod - Google Patents
Diffusing argon blowing stopper rod for continuous casting and manufacturing method for stopper rod Download PDFInfo
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- CN104889377A CN104889377A CN201510189439.8A CN201510189439A CN104889377A CN 104889377 A CN104889377 A CN 104889377A CN 201510189439 A CN201510189439 A CN 201510189439A CN 104889377 A CN104889377 A CN 104889377A
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- stopper
- stopper rod
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Abstract
The invention relates to a diffusing argon blowing stopper rod for continuous casting and a manufacturing method for the stopper rod. The stopper rod is formed by a stopper rod body and a stopper rod head fixed on the front end of the stopper rod body, wherein an argon channel to the stopper rod head is formed in the stopper rod body; the stopper rod head is made from porous material; and argon is diffusedly blown into molten steel via porous material. The manufacturing method comprises material preparation, mixture, formation, sintering, machinery processing, coating and packing. Compared with the prior art, the beneficial effects of the diffusing argon blowing stopper rod for continuous casting and the manufacturing method for the stopper rod are that air guide holes are unnecessary for the stopper rod head; argon is blown via the porous material having great apparent porosity, so argon can be evenly blown and impurities accumulated on the stopper rod head can be removed; control current precision can be improved; compared with a common stopper rod, effects on liquid level fluctuation of a crystallizer by large bubbles due to concentrated argon blowing can be avoided, so argon blowing effect can be enhanced; the stopper rod head having apparent porosity greater than 20%is made from with addition of ignition lost agent to raw material; and simple manufacturing method is provided and low cost is achieved.
Description
Technical field
The present invention relates to a kind of continuous casting stopper, particularly relate to a kind of continuous casting dispersivity Argon stopper and manufacture method thereof.
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 invention 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; Invention also provides the manufacture method of described stopper.
In order to achieve the above object, the present invention realizes by the following technical solutions:
A kind of 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, described stopper head 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%.
Described 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%.
Described additive is one, two or more any combination in metallic silicon power, Al-Mg alloy powder, boron carbide.
A manufacture method for continuous casting dispersivity Argon stopper, comprises the steps:
1) prepare burden: according to weight ratio, each for stopper head raw material is weighed up for subsequent use;
2) mix: stopper head 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 material outer wall brushing antioxidizing paint after machining, is final finished;
7) pack: finished product is qualified rear packaging on inspection.
Compared with prior art, the invention has the beneficial effects as follows:
1) in the present invention, 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;
3) adopt the stopper head that the method making apparent porosity of adding burning mistake agent is in the feed greater than 20%, manufacturing process is simple, and cost is low.
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 of the present invention.
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, the specific embodiment of the present invention is described further:
See Fig. 3, it is the structural representation of continuous casting dispersivity Argon stopper of the present invention, a kind of continuous casting dispersivity Argon stopper of the present invention, 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%.
Described 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%.
Described additive is one, two or more any combination in metallic silicon power, Al-Mg alloy powder, boron carbide.
A manufacture method for continuous casting dispersivity Argon stopper, comprises the steps:
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 present invention 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 solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention 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 manufacturing 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 process for making 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/cm3, 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 process for making 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/cm3, 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 (5)
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 argon gas is blown in molten steel through porous material dispersivity.
2. a kind of continuous casting dispersivity Argon stopper according to claim 1, it is characterized in that, the apparent porosity of described porous material is greater than 20%.
3. a kind of continuous casting dispersivity Argon stopper according to claim 1, it is characterized in that, described 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%.
4. a kind of continuous casting dispersivity Argon stopper according to claim 3, is characterized in that, described additive is one, two or more any combination in metallic silicon power, Al-Mg alloy powder, boron carbide.
5. the manufacture method of a kind of continuous casting dispersivity Argon stopper according to claim 1, is characterized in that, comprise the steps:
1) prepare burden: according to weight ratio, each for stopper head raw material is weighed up for subsequent use;
2) mix: stopper head 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 material outer wall brushing antioxidizing paint after machining, is final finished;
7) pack: finished product is qualified rear packaging on inspection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510189439.8A CN104889377A (en) | 2015-04-18 | 2015-04-18 | Diffusing argon blowing stopper rod for continuous casting and manufacturing method for stopper rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510189439.8A CN104889377A (en) | 2015-04-18 | 2015-04-18 | Diffusing argon blowing stopper rod for continuous casting and manufacturing method for stopper rod |
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| CN201510189439.8A Pending CN104889377A (en) | 2015-04-18 | 2015-04-18 | Diffusing argon blowing stopper rod for continuous casting and manufacturing method for stopper rod |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107598146A (en) * | 2017-08-17 | 2018-01-19 | 中冶连铸技术工程有限责任公司 | With the method for submersed nozzle ladle canal sectional area pre-control plug head location |
| CN107695331A (en) * | 2017-11-03 | 2018-02-16 | 淄博双马新材料科技股份有限公司 | A kind of automatic charging system for stopper production |
| 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 |
| CN108907169A (en) * | 2018-07-06 | 2018-11-30 | 苏州宝明高温陶瓷有限公司 | A kind of stopper and its forming method for preventing caput from cracking |
| CN110695349A (en) * | 2019-11-21 | 2020-01-17 | 辽宁科技大学 | CSP thin slab continuous casting high-pulling-speed submerged nozzle and manufacturing method thereof |
| CN112792960A (en) * | 2021-02-01 | 2021-05-14 | 北京利尔高温材料股份有限公司 | Novel low-cost high-efficiency integral stopper rod head die |
Citations (5)
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|---|---|---|---|---|
| JPS6195756A (en) * | 1984-10-16 | 1986-05-14 | Nippon Steel Corp | Stopper for gas blowing tundish |
| EP0411999A1 (en) * | 1989-08-03 | 1991-02-06 | Vesuvius France S.A. | Stopper rod for regulating the flow of a liquid, having a free space fed with gas |
| CN1075307A (en) * | 1992-02-14 | 1993-08-18 | 淄川区洪山特殊耐火材料厂 | Aluminium carbon integrated filler rod |
| CN101873903A (en) * | 2007-11-24 | 2010-10-27 | 耐火材料知识产权有限两合公司 | Stopper rod |
| CN102416451A (en) * | 2011-12-12 | 2012-04-18 | 辽宁科大东方巨业高级陶瓷有限公司 | Anti-plugging tundish water supplying opening and manufacturing method thereof |
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2015
- 2015-04-18 CN CN201510189439.8A patent/CN104889377A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6195756A (en) * | 1984-10-16 | 1986-05-14 | Nippon Steel Corp | Stopper for gas blowing tundish |
| EP0411999A1 (en) * | 1989-08-03 | 1991-02-06 | Vesuvius France S.A. | Stopper rod for regulating the flow of a liquid, having a free space fed with gas |
| CN1075307A (en) * | 1992-02-14 | 1993-08-18 | 淄川区洪山特殊耐火材料厂 | Aluminium carbon integrated filler rod |
| CN101873903A (en) * | 2007-11-24 | 2010-10-27 | 耐火材料知识产权有限两合公司 | Stopper rod |
| CN102416451A (en) * | 2011-12-12 | 2012-04-18 | 辽宁科大东方巨业高级陶瓷有限公司 | Anti-plugging tundish water supplying opening and manufacturing method thereof |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107598146A (en) * | 2017-08-17 | 2018-01-19 | 中冶连铸技术工程有限责任公司 | With the method for submersed nozzle ladle canal sectional area pre-control plug head location |
| CN107695331A (en) * | 2017-11-03 | 2018-02-16 | 淄博双马新材料科技股份有限公司 | A kind of automatic charging system for stopper production |
| CN107695331B (en) * | 2017-11-03 | 2023-03-14 | 淄博双马新材料科技股份有限公司 | Automatic charging system for stopper rod production |
| 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 |
| CN108907169A (en) * | 2018-07-06 | 2018-11-30 | 苏州宝明高温陶瓷有限公司 | A kind of stopper and its forming method for preventing caput from cracking |
| CN108907169B (en) * | 2018-07-06 | 2020-09-11 | 苏州宝明高温陶瓷有限公司 | Stopper rod capable of preventing rod head from cracking and forming method thereof |
| CN110695349A (en) * | 2019-11-21 | 2020-01-17 | 辽宁科技大学 | CSP thin slab continuous casting high-pulling-speed submerged nozzle and manufacturing method thereof |
| CN110695349B (en) * | 2019-11-21 | 2024-03-12 | 辽宁科技大学 | CSP sheet billet continuous casting high-pulling-speed submerged nozzle and manufacturing method thereof |
| CN112792960A (en) * | 2021-02-01 | 2021-05-14 | 北京利尔高温材料股份有限公司 | Novel low-cost high-efficiency integral stopper rod head die |
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Application publication date: 20150909 |