CN107755679B - Argon blowing sealing and molten steel cleaning long nozzle device and argon blowing method - Google Patents
Argon blowing sealing and molten steel cleaning long nozzle device and argon blowing method Download PDFInfo
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- CN107755679B CN107755679B CN201711282961.6A CN201711282961A CN107755679B CN 107755679 B CN107755679 B CN 107755679B CN 201711282961 A CN201711282961 A CN 201711282961A CN 107755679 B CN107755679 B CN 107755679B
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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
- B22D41/58—Pouring-nozzles with gas injecting means
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Abstract
The invention discloses an argon blowing sealing and molten steel cleaning long nozzle device and an argon blowing method, and belongs to the technical field of ferrous metallurgy. The long nozzle is characterized in that the shape of the middle part is changed, a flow storage area is formed in the middle of the long nozzle, and meanwhile, an argon blowing hole is formed in the flow storage area.
Description
Technical Field
The invention relates to the technical field of ferrous metallurgy, in particular to a long nozzle device for argon blowing sealing and cleaning molten steel and an argon blowing method.
Background
With the development of social economy and science and technology, the performance requirements on steel materials are increasingly improved. How to effectively prevent and maximally remove the inclusions so as to improve the cleanliness of molten steel is the main direction of current researches. The cleanliness of the casting blank can be controlled from two aspects, on one hand, the inclusion in molten steel can be removed in various ways, on the other hand, the inclusion entering and generating in the smelting and pouring processes are reduced, particularly, the molten steel suction problem is solved, the molten steel suction can bring two hazards, one hazard is secondary oxidation of molten steel, namely, elements such as acid-soluble aluminum in the molten steel are oxidized into oxides, and the other hazard is the increase of the nitrogen element content in the molten steel. With the improvement of the refining technology level, the removal of inclusions in molten steel has reached a higher level, and at present, it is becoming more and more important to prevent the molten steel from being sucked in during the casting process.
Nitrogen is a solid solution strengthening element in steel, can cause phenomena of aging, blue brittleness and the like, and can generate sharper inclusions with titanium, aluminum and the like; nitrogen in steel may reduce toughness, plasticity, weldability, etc. of steel. The nitrogen content in the molten steel is the lowest at the steelmaking end point, and the increase of nitrogen element in the molten steel is mainly caused by air suction in the subsequent refining and pouring processes. Therefore, in order to prevent the gettering during the casting, it is necessary to take a protective casting to prevent the nitrogen gettering of the molten steel.
Aluminum is used for deoxidization in molten steel, and in order to obtain lower dissolved oxygen, the content of acid-soluble aluminum is generally controlled to be between 0.025 and 0.045 percent, and the content of acid-soluble aluminum in some high-aluminum steels such as 38CrMoAl is more high to be between 0.7 and 1.1 percent. If the molten steel is sucked in during the pouring process, acid-soluble aluminum in the molten steel and oxygen in the air can generate alumina inclusions, so that a series of problems such as nozzle blockage, flow accumulation and the like are caused during the pouring process.
In order to prevent ladle transfer and air suction in the casting process and improve the purity of molten steel, a ladle nozzle and a ladle long nozzle are generally adopted to realize ladle protection casting in the continuous casting production process at present by argon blowing and sealing. However, the joint therebetween is liable to suck air due to the negative pressure caused by the poured steel flow, resulting in an increase in nitrogen content and oxygen content in the molten steel. The ventilation ring type argon blowing sealing mode mainly has the defects of poor later-stage effect, easy blockage during steel overflow and the like, and the sealing gasket has the defects of easy damage, unstable sealing effect and the like.
Some patents currently use long nozzle to blow argon to use large ladle potential energy, such as patent CN102864283a, with the patent name: argon blowing long nozzle for clean steel; in the application, an annular air chamber communicated with an argon blowing conduit is arranged between the inner side wall and the outer side wall of a long water gap; the annular air chamber extends to the radial direction of the inner side wall of the water gap, and a plurality of air holes for communicating the inside of the water gap with the annular air chamber are also formed in the inner side wall of the water gap. According to the application, argon is blown into the gas chamber through the argon blowing connecting pipe, argon is blown into molten steel through each air hole in the gas chamber, a plurality of small bubbles can be generated on the inner wall of the water gap, and meanwhile, the small bubbles can be broken into finer bubbles through shearing force generated by the velocity gradient of molten steel flowing. The small bubbles capture the inclusion and float up quickly after entering the tundish, and are adsorbed by the tundish covering agent, so that the cleanliness of the casting blank is improved. Invention patent CN104139179a, patent name: the application also proposes to improve the argon-blowing long nozzle for better argon sealing and small bubbles generation by using the potential energy of the ladle. However, the above applications are all technical improvements to the argon blowing portion of the long nozzle, and do not improve or innovate the long nozzle. The invention patent CN102864283A is provided with the step funnel at the upper end of the long nozzle, and also mainly aims to better butt joint the long nozzle with a ladle, better wrap the ladle, achieve better sealing effect and not play a role in dissipating the potential energy of molten steel.
Chinese patent No. ZL201621488358.4, authorized bulletin day of 14 days 7 month of 2017, and the invention is named: a steel ladle long nozzle for immersion casting; the top of this application long mouth of a river body is equipped with the bowl mouth, bowl mouth and inner chamber looks UNICOM, long mouth of a river body lower extreme inner chamber diameter is greater than the inner chamber diameter of long mouth of a river body upper end, and the inner chamber is horn mouth form. According to the application, the inner cavity volume of the lower end of the ladle long nozzle body is enlarged, even if residual air exists during casting, the heated expansion pressure is very small, the sealing between the long nozzle and the ladle outlet cannot be impacted, the sealing leakage between the long nozzle and the ladle outlet is avoided, and the casting quality is improved. However, the application mainly relies on a bell mouth structure arranged at the lower end of the long nozzle body to avoid forming impact, molten steel can be further dispersed at the last moment of passing through the long nozzle, and the potential energy of the molten steel is dissipated passively, so that the effect is not ideal; in order not to generate larger impact depth, the cross section area of the bell mouth structure at the lower end is designed to be larger, and the long water gap has defects in structural design.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention provides a long nozzle device for argon blowing sealing and cleaning molten steel and an argon blowing method, aiming at the problems of the background technology; the kinetic energy dissipated by the molten steel in the flow storage area is utilized to break argon into small bubbles, and the small bubbles are carried by the molten steel into a tundish to further remove impurities; the long nozzle outlet is in a horn mouth shape, so that the potential energy of molten steel is further dissipated to reduce the impact on the molten steel of the tundish.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the invention relates to an argon blowing sealing and molten steel cleaning long nozzle device, which comprises a long nozzle body, wherein a hollow inner cavity is arranged in the long nozzle body, and the diameter of the inner cavity in the middle of the long nozzle body is larger than that of the inner cavities at two ends, so that a flow storage area is formed.
As a further improvement of the invention, one end of the long nozzle body is provided with a bowl opening, the bowl opening is abutted with the ladle water outlet, and a sealing gasket is arranged between the bowl opening and the ladle water outlet.
As a further improvement of the invention, an argon blowing hole is arranged on the side wall of one end of the flow storage area, which is close to the bowl mouth, and an argon blowing pipe is connected with the argon blowing hole, and argon is blown into the long water gap flow storage area through the argon blowing pipe.
As a further improvement of the invention, the argon blowing pipes are circumferentially arranged at intervals of 4-6 along the side wall of the storage area.
As a further improvement of the invention, at least one row of argon blowing pipes which are uniformly distributed along the circumferential direction is arranged on the side wall of the flow storage area at a position which is 30cm away from the junction position of the flow storage area and the upper long nozzle body, and 4-6 argon blowing pipes are arranged in each row.
As a further improvement of the invention, the diameter of the inner cavity of the flow storage area is 1.3-1.8 times of the diameter of the inner cavity of the long water gap body at two ends.
As a further improvement of the invention, the flow storage area is arranged 140-170cm away from the lower part of the bowl mouth.
As a further improvement of the invention, the 10cm section of the outlet of the long nozzle body is provided with a bell mouth, and the diameter of the inner cavity of the bell mouth is 1.4-1.6 times of that of the inner cavity of the long nozzle body.
According to the argon blowing method by utilizing the long nozzle device, firstly, the ladle water outlet is opened, after the ladle water outlet is confirmed to be opened, the ladle water outlet is closed, then the bowl opening of the long nozzle body is in butt joint with the ladle water outlet, argon is blown into a flow storage area through an argon blowing guide pipe, and then the ladle water outlet is opened for the second time to open molten steel.
As a further improvement of the invention, after the water outlet of the ladle is opened for the second time, the flow rate of the blown argon is 30-60L/h, and the blowing argon pressure is 0.1-2Mpa.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) According to the long nozzle device for argon blowing sealing and cleaning molten steel, disclosed by the invention, by improving the traditional long nozzle structure, the flow storage areas with the inner cavity diameter larger than that of the inner cavities at the two ends of the long nozzle are arranged in the middle of the long nozzle body, so that molten steel in a ladle enters a tundish below in a stepped manner, the potential energy of the molten steel is fully dissipated in the flow storage areas of the long nozzle, and the impact of the molten steel on the tundish is effectively reduced;
(2) According to the long nozzle device for blowing argon to seal and clean molten steel, argon is blown into a middle flow storage area of the long nozzle and is reserved in the flow storage area, an argon atmosphere is formed in the flow storage area to seal the long nozzle to prevent nitrogen absorption of the molten steel, meanwhile, part of argon is impacted into small argon bubbles by the impact of the molten steel due to the flow storage area in the middle part and then is taken into a tundish by the molten steel, so that the purity of the molten steel is ensured, and the inclusion removing capacity of the tundish is improved;
(3) The invention relates to a long nozzle device for argon blowing sealing and cleaning molten steel, which is characterized in that the outlet end of the long nozzle is improved in a certain shape, namely, the outlet of the long nozzle is designed to be in a horn shape, the diameter of the inner cavity of the horn is only 1.4-1.6 times of that of the inner cavity of a long nozzle body, and compared with the traditional large horn design, on the one hand, the long nozzle device can further dissipate the potential energy of molten steel at the outlet end of the long nozzle on the premise that a storage area is arranged at the front end so as to reduce the impact on the molten steel of a tundish; on the other hand, the horn mouth area is smaller, so that the long nozzle structure is more optimized;
(4) According to the long nozzle device for argon blowing sealing and cleaning molten steel, the argon blowing guide pipes are directly arranged in the flow storage area, a plurality of argon blowing guide pipes are uniformly distributed along the circumferential direction of the side wall of the flow storage area, and the plurality of argon blowing guide pipes are symmetrically and radially designed, so that an argon uniform atmosphere is easy to form and is convenient to seal; the inner cavity of the flow storage area is thickened, more space is provided for argon, molten steel enters the flow storage area, the argon can timely and uniformly protect the molten steel, and when the potential energy of the molten steel is dissipated in the flow storage area, the nearby argon is more convenient to be sucked and scattered to form small bubbles and enter a tundish along with the molten steel;
(5) According to the method for blowing argon by using the long nozzle device, disclosed by the invention, the structural improvement of the long nozzle is matched, the flow rate of the blown argon is 30-60L/h in the normal pouring process of molten steel, the blowing argon pressure is 0.1-2Mpa, under the condition, the argon rises to a sealing area to form a micro-positive argon atmosphere, so that the molten steel can be effectively prevented from being sucked, the kinetic energy dissipated by the molten steel in a flow storage area can fully break the argon to form small bubbles, and the small bubbles enter a tundish to further remove impurities, and the cleanliness of the molten steel is ensured.
Drawings
FIG. 1 is a schematic view of the long nozzle structure of the argon blowing seal and clean molten steel of the present invention.
Reference numerals in the schematic drawings illustrate:
1. a ladle water outlet; 2. a sealing gasket; 3. a long nozzle body; 4. an argon blowing guide pipe; 5. a storage area; 6. a horn mouth.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples.
Example 1
Referring to fig. 1, a long nozzle device for argon blowing sealing and cleaning molten steel in this embodiment is disposed at the junction of a ladle and a tundish. The long water gap body 3 is a reducing body with a convex middle part and a trumpet-shaped lower end outlet, in particular to a funnel-shaped bowl opening at the upper end of the long water gap body 3, the bowl opening is abutted with the ladle water outlet 1, and a sealing gasket 2 is arranged between the bowl opening and the ladle water outlet 1. The long nozzle body 3 is internally provided with a hollow inner cavity, the embodiment is provided with a flow storage area 5 at a position 150cm away from the lower part of the bowl mouth, and the diameter of the inner cavity of the flow storage area 5 is larger than that of the inner cavities of the long nozzle bodies 3 at two ends. The main function of the storage area 5 is to enable molten steel in the ladle to enter the tundish below in a stepped mode, and the potential energy of the molten steel is fully dissipated in the storage area 5 so as to reduce the impact of the molten steel on the tundish. Meanwhile, argon is reserved in the flow storage area, and an argon atmosphere sealing long nozzle is formed to prevent nitrogen absorption of molten steel. Through long-term theoretical research and practical summary in steel mills, the inventor considers that the diameter of the inner cavity of the storage area 5 is 1.3-1.8 times of the diameter of the inner cavity of the long water gap body 3 at two ends, and particularly the diameter of the inner cavity of the storage area 5 of the embodiment is 1.5 times of the diameter of the inner cavity of the long water gap body 3 at two ends.
In this embodiment, on the side wall of the storage area 5, an argon blowing hole is arranged at a position 30cm away from the junction position of the storage area 5 and the upper long nozzle body 3, the argon blowing pipes 4 are directly connected with the argon blowing hole, and 4 argon blowing pipes 4 are circumferentially arranged at intervals along the side wall of the storage area 5, and argon is blown into the long nozzle storage area 5 through the argon blowing pipes 4. The argon blowing guide pipes 4 are symmetrically and radially designed for 4, so that an argon uniform atmosphere is easy to form, and the sealing is convenient.
It should be noted that, for improvement of purity of molten steel, it is necessary to remove deoxidized products after tapping in addition to preventing the entry of external air into oxide formation. According to the prior theory, the inclusion is captured by bubbles and removed by floating upwards, which is a simple and effective means. Meanwhile, the related studies indicate that: the bubbles effective in removing the inclusions should be fine bubbles, and the optimum range is 2-15mm. The patent name of the invention CN102864283a mentioned in the background art is: argon blowing long nozzle for clean steel; namely, the shearing force generated by the potential energy of the ladle molten steel is utilized to break the large bubbles into small bubbles, so that the small bubbles are formed, and the inclusions are removed better.
In this embodiment, although the above theory is also used, the argon blowing pipe 4 is directly arranged in the storage area 5, and the inner cavity at the storage area 5 is thickened, so that more space is provided for argon. Firstly, argon atmosphere is easy to form, so that the sealing is convenient; secondly, molten steel enters the storage area 5, argon can timely and uniformly protect the molten steel, and nearby argon is more conveniently sucked when the potential energy of the molten steel is dissipated in the storage area 5, so that tiny bubbles are fully scattered and enter the tundish along with the molten steel, and the capability of removing impurities of the tundish is improved. In terms of argon blowing sealing, the argon blowing port is arranged at the upper end of the long water port, argon blowing is carried out at the position of the water outlet 1 of the wrapping ladle, so that the space reserved for argon blowing is relatively small, the sealing effect at the joint is not very good, and nitrogen absorption of molten steel cannot be effectively prevented. In the embodiment, more argon is contained in the flow storage area 5, and the argon can be ejected to the position of the ladle water outlet 1 under a smaller pressure, so that the sealing effect which is the same as or even better than that of the traditional argon blowing mode can be achieved.
The 10cm section of the outlet of the long water gap body 3 is provided with a horn mouth 6, the diameter of the inner cavity at the uppermost end of the horn mouth 6 is 1.4 times that of the inner cavity of the long water gap body 3, and the diameter of the inner cavity at the lowermost end is 1.6 times that of the inner cavity of the long water gap body 3. According to the embodiment, by improving a traditional long nozzle structure, the flow storage area 5 is arranged in the middle of the long nozzle body, so that molten steel in a ladle enters a tundish below in a stepped mode, potential energy of the molten steel is fully dissipated in the flow storage area of the long nozzle, impact of the molten steel on the tundish is effectively lightened, the buffering distance in the middle can be adjusted according to actual conditions, and dissipation of the potential energy is more flexible and active. Compared with the traditional mode that the lower end of the long nozzle is provided with a large bell mouth independently, on one hand, on the premise that the front end is provided with the flow storage area 5, the potential energy of molten steel can be further dissipated at the outlet end of the long nozzle so as to reduce the impact on the molten steel of the tundish; on the other hand, the horn mouth area of the embodiment is smaller, the impact depth is smaller, refractory materials cannot be flushed when the depth of molten steel in the earlier stage is shallower, and a slag layer is not easy to be involved in the molten steel.
The embodiment also designs a method for blowing argon by using the long nozzle device, which is matched with the structural improvement of the long nozzle, and comprises the following specific processes: firstly, the ladle water outlet 1 is opened, after the ladle water outlet 1 is confirmed to be opened, the ladle water outlet 1 is closed, then the bowl mouth of the long nozzle body 3 is in butt joint with the ladle water outlet 1, argon is blown into the flow storage area 5 through the argon blowing pipe 4, then the ladle water outlet 1 is opened for the second time to open molten steel, at the moment, the flow of the blown argon is controlled to be in the range of 30-40L/h, and the blowing pressure is controlled to be in the range of 0.1-1 Mpa. Under the condition, argon rises to the sealing area to form a micro-positive pressure argon atmosphere, so that the suction of molten steel can be effectively prevented, the kinetic energy dissipated by the molten steel in the flow storage area can fully break up the argon to form small bubbles, and the small bubbles enter the tundish to further remove impurities, so that the cleanliness of the molten steel is ensured.
Example 2
The long nozzle device for argon blowing sealing and cleaning molten steel in this embodiment is basically the same as that in embodiment 1, and is different in that: in the embodiment, a flow storage area 5 is arranged at a position 140cm away from the lower part of the long water gap bowl mouth, and the diameter of the inner cavity of the flow storage area 5 is 1.3 times that of the inner cavity of the long water gap body 3 at two ends. Two rows of argon blowing pipes which are uniformly distributed along the circumferential direction are arranged on the side wall of the flow storage area 5 and at a position 30cm away from the junction position of the flow storage area 5 and the upper end long nozzle body 3, and each row is provided with 6 argon blowing pipes. In order to match with the structural improvement of the long nozzle, the embodiment controls the flow of the blown argon to be in the range of 50-60L/h and the pressure of the blown argon to be in the range of 0.5-1.5Mpa after the water outlet of the ladle is opened for the second time.
Example 3
The long nozzle device for argon blowing sealing and cleaning molten steel in this embodiment is basically the same as that in embodiment 1, and is different in that: in the embodiment, a flow storage area 5 is arranged at a position 170cm away from the lower part of the long water gap bowl mouth, and the diameter of the inner cavity of the flow storage area 5 is 1.8 times that of the inner cavity of the long water gap body 3 at two ends. Two rows of argon blowing pipes uniformly distributed along the circumferential direction are arranged on the side wall of the flow storage area 5 at a position 30cm away from the junction position of the flow storage area 5 and the upper end long nozzle body 3, and each row is provided with 5 argon blowing pipes. In order to match with the structural improvement of the long nozzle, the embodiment controls the flow of the blown argon to be in the range of 40-50L/h and the pressure of the blown argon to be in the range of 1-2Mpa after the water outlet of the ladle is opened for the second time.
The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.
Claims (4)
1. The utility model provides a long mouth of a river device of sealed and clean molten steel of argon blowing, includes long mouth of a river body (3), long mouth of a river body (3) inside is equipped with cavity inner chamber, its characterized in that: the diameter of the inner cavity in the middle of the long nozzle body (3) is larger than that of the inner cavities at the two ends, so as to form a flow storage area (5); one end of the long water gap body (3) is provided with a bowl opening, the bowl opening is in butt joint with the ladle water outlet (1), and a sealing gasket (2) is arranged between the bowl opening and the ladle water outlet (1); an argon blowing hole is formed in the side wall of one end, close to the bowl mouth, of the flow storage area (5), an argon blowing pipe (4) is connected with the argon blowing hole, and argon is blown into the long water gap flow storage area (5) through the argon blowing pipe (4); at least one row of argon blowing guide pipes (4) which are uniformly distributed along the circumferential direction are arranged on the side wall of the flow storage area (5) at a position which is 30cm away from the junction position of the flow storage area (5) and the upper end long nozzle body (3), and 4-6 argon blowing guide pipes (4) are arranged in each row;
the diameter of the inner cavity of the flow storage area (5) is 1.3-1.8 times of the diameter of the inner cavity of the long water gap body (3) at the two ends;
the flow storage area (5) is arranged at a position 140-170cm away from the lower part of the bowl mouth.
2. The long nozzle apparatus for argon blowing sealing and cleaning molten steel as claimed in claim 1, wherein: the 10cm section of the outlet of the long water gap body (3) is provided with a horn mouth (6), and the diameter of the inner cavity of the horn mouth (6) is 1.4-1.6 times of the diameter of the inner cavity of the long water gap body (3).
3. A method of argon blowing using the long nozzle apparatus of claim 1 or 2, characterized in that: firstly, a ladle water outlet (1) is opened, after the ladle water outlet (1) is confirmed to be opened, the ladle water outlet (1) is closed, then a bowl mouth of a long water gap body (3) is butted with the ladle water outlet (1), argon is blown to a flow storage area (5) through an argon blowing conduit (4), and then the ladle water outlet (1) is opened for the second time to open molten steel.
4. A method of argon blowing according to claim 3, wherein: after the ladle water outlet (1) is opened for the second time, the flow rate of the blown argon is 30-60L/h, and the pressure of the blown argon is 0.1-2Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711282961.6A CN107755679B (en) | 2017-12-07 | 2017-12-07 | Argon blowing sealing and molten steel cleaning long nozzle device and argon blowing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711282961.6A CN107755679B (en) | 2017-12-07 | 2017-12-07 | Argon blowing sealing and molten steel cleaning long nozzle device and argon blowing method |
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| CN107755679A CN107755679A (en) | 2018-03-06 |
| CN107755679B true CN107755679B (en) | 2023-09-19 |
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| CN108927511B (en) * | 2018-09-28 | 2020-03-03 | 北京科技大学 | Prevent long mouth of a river of export bias flow |
| US11897027B2 (en) * | 2021-04-15 | 2024-02-13 | Shinagawa Refractories Co., Ltd | Immersion nozzle for continuous casting |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07148561A (en) * | 1993-09-28 | 1995-06-13 | Kobe Steel Ltd | Pouring nozzle for continuous casting and continuous casting method |
| JP2004322119A (en) * | 2003-04-22 | 2004-11-18 | Jfe Steel Kk | Fountain for continuous casting |
| JP2006346688A (en) * | 2005-06-13 | 2006-12-28 | Kurosaki Harima Corp | Long nozzle with swing flow |
| CN202316999U (en) * | 2011-09-15 | 2012-07-11 | 华耐国际（宜兴）高级陶瓷有限公司 | Immersed ladle long nozzle for preventing secondary oxidation of molten steel |
| CN102864283A (en) * | 2012-09-19 | 2013-01-09 | 中冶南方工程技术有限公司 | Argon-blowing long nozzle for clean steel |
| CN203664656U (en) * | 2013-09-12 | 2014-06-25 | 北京科技大学 | Consumption type steel ladle long nozzle |
| CN104226973A (en) * | 2014-08-20 | 2014-12-24 | 马钢(集团)控股有限公司 | Continuous casting protection casting device of high-quality steel |
| CN204818038U (en) * | 2015-06-30 | 2015-12-02 | 新疆八一钢铁股份有限公司 | Seal structure at long mouth of a river of modified ladle |
| CN206326126U (en) * | 2016-12-30 | 2017-07-14 | 维苏威高级陶瓷(中国)有限公司 | A kind of immersion, which is opened to pour, uses ladle long nozzle |
| CN207521700U (en) * | 2017-12-07 | 2018-06-22 | 安徽工业大学 | A kind of long nozzle device of argon blowing seal and purifying of steel |
-
2017
- 2017-12-07 CN CN201711282961.6A patent/CN107755679B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07148561A (en) * | 1993-09-28 | 1995-06-13 | Kobe Steel Ltd | Pouring nozzle for continuous casting and continuous casting method |
| JP2004322119A (en) * | 2003-04-22 | 2004-11-18 | Jfe Steel Kk | Fountain for continuous casting |
| JP2006346688A (en) * | 2005-06-13 | 2006-12-28 | Kurosaki Harima Corp | Long nozzle with swing flow |
| CN202316999U (en) * | 2011-09-15 | 2012-07-11 | 华耐国际（宜兴）高级陶瓷有限公司 | Immersed ladle long nozzle for preventing secondary oxidation of molten steel |
| CN102864283A (en) * | 2012-09-19 | 2013-01-09 | 中冶南方工程技术有限公司 | Argon-blowing long nozzle for clean steel |
| CN203664656U (en) * | 2013-09-12 | 2014-06-25 | 北京科技大学 | Consumption type steel ladle long nozzle |
| CN104226973A (en) * | 2014-08-20 | 2014-12-24 | 马钢(集团)控股有限公司 | Continuous casting protection casting device of high-quality steel |
| CN204818038U (en) * | 2015-06-30 | 2015-12-02 | 新疆八一钢铁股份有限公司 | Seal structure at long mouth of a river of modified ladle |
| CN206326126U (en) * | 2016-12-30 | 2017-07-14 | 维苏威高级陶瓷(中国)有限公司 | A kind of immersion, which is opened to pour, uses ladle long nozzle |
| CN207521700U (en) * | 2017-12-07 | 2018-06-22 | 安徽工业大学 | A kind of long nozzle device of argon blowing seal and purifying of steel |
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| CN107755679A (en) | 2018-03-06 |
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