CN115338397A - Process arrangement structure of water gap and using method - Google Patents
Process arrangement structure of water gap and using method Download PDFInfo
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- CN115338397A CN115338397A CN202210858733.3A CN202210858733A CN115338397A CN 115338397 A CN115338397 A CN 115338397A CN 202210858733 A CN202210858733 A CN 202210858733A CN 115338397 A CN115338397 A CN 115338397A
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- Prior art keywords
- crystallizer
- water gap
- nozzle
- molten steel
- water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000008569 process Effects 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 51
- 239000010959 steel Substances 0.000 claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 20
- 229910052802 copper Inorganic materials 0.000 claims description 20
- 239000010949 copper Substances 0.000 claims description 20
- 230000004907 flux Effects 0.000 claims description 13
- 238000005266 casting Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 238000007654 immersion Methods 0.000 description 5
- 238000009749 continuous casting Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention relates to a process arrangement structure of a water gap and a using method, and belongs to the technical field of metallurgical industry. The submerged nozzle system comprises at least two nozzles, and one end of each nozzle, which is far away from the tundish, is inserted into the crystallizer and movably arranged in the crystallizer along the extending direction of the crystallizer. The invention guides the liquid molten steel in the tundish into the crystallizer through the plurality of water gaps of the submerged nozzle system, reduces the impact of the molten steel which just flows into the crystallizer at the position of the water gap on the original liquid molten steel in the crystallizer, reduces the fluctuation of the liquid level, and simultaneously, the submerged nozzle system is applied, the axial size of each water gap can be reduced, the flat crystallizer can meet the requirement of the flat crystallizer on the volume of the crystallizer, the cost of the crystallizer is reduced, and the service life of the crystallizer is prolonged.
Description
Technical Field
The invention belongs to the technical field of metallurgical industry, and relates to a process arrangement structure of a water gap and a using method.
Background
The continuous casting and rolling of the sheet billet has the advantages of high production efficiency (high continuous casting and pulling speed), low construction cost, low production cost and the like, and is popular with users of steel companies. At present, two mature thin slab continuous casting and rolling production technologies are available internationally, namely the CSP technology of Simacre and the ESP technology of Avidi. The two technologies adopt a funnel-shaped crystallizer scheme when molten steel is cooled once, liquid molten steel is guided into the funnel-shaped crystallizer through a submerged nozzle in a tundish, and primary cooling is completed in the funnel-shaped crystallizer to form a primary blank shell.
The funnel-shaped crystallizer is used for expanding the volume of an inner cavity of the upper area of the crystallizer, facilitating the immersion nozzle to be inserted into the crystallizer, increasing the distance between the outer wall of the immersion nozzle and the wall of the funnel-shaped crystallizer and facilitating the flow of molten steel. However, this technique also brings about the following problems:
1) Because the continuous casting drawing speed is high, the molten steel flux is large, and the liquid level fluctuation of the crystallizer is large due to large impact on the liquid molten steel in the crystallizer after the molten steel is guided into the crystallizer from the tundish through the submerged nozzle;
2) The wall surface of the copper plate of the funnel-shaped crystallizer is a curved surface, so that the raw material cost and the processing cost are both greatly improved.
3) The funnel-shaped crystallizer is subjected to uneven loads (including thermal loads and stress loads), resulting in a low service life.
Disclosure of Invention
In view of the above, the present invention provides a process arrangement structure of a nozzle and a method for using the same, which are used to solve the above problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a technology arrangement structure of a water gap is sequentially provided with a tundish, an immersion type water gap system and a crystallizer along the flowing direction of molten steel, wherein the immersion type water gap system comprises at least two water gaps, and one end of each water gap, which is far away from the tundish, is inserted into the crystallizer and is movably arranged in the crystallizer along the extending direction of the crystallizer.
Optionally, the number of the nozzles is not more than ten.
Optionally, the crystallizer is a rectangular body, and a cavity is surrounded by 2 relatively arranged wide copper plates and 2 relatively arranged narrow copper plates and used for completing primary cooling to form a primary blank shell.
Optionally, the width of the wide copper plate is not less than 900mm, the thickness of the wide copper plate is not more than 50mm, and the surface of the wide copper plate is a plane.
The use method of the nozzle adopts the process arrangement structure of the nozzle, and adjusts the number of the nozzles, the depth of the nozzle inserted into the crystallizer and the molten steel flux of the nozzle according to the process requirements.
Optionally, the number of the water gaps depends on the width of a produced casting blank and the distance between the adjacent water gaps, and in order to avoid the liquid level fluctuation of the molten steel in the crystallizer caused by the mutual impact of the upper circulating flows of the molten steel sprayed by the water gaps, the distance between the adjacent water gaps is not less than 150mm.
Optionally, in order to avoid that molten steel sprayed from the water gap seriously erodes the crystallizer and reduces the service life of the crystallizer, the distance between the water gap and the side copper plate of the crystallizer is not less than 100mm.
Optionally, the depth of the water gap inserted into the crystallizer is based on the fluctuation condition of the liquid level of the crystallizer, and is between 100mm and 200mm based on the condition that the proportion of fluctuation of the liquid level is less than +/-3 mm and greater than 95% and the proportion of +/-5 mm and greater than 99%, and when the pulling speed is increased and the fluctuation of the liquid level of the crystallizer is too large, the depth of the water gap inserted into the crystallizer is increased.
Optionally, the molten steel flux of the water gap is not more than 10t/min.
Optionally, when the molten steel flux of the water gap is less than 3t/min, the depth of the water gap inserted into the crystallizer is less than 130mm; when the molten steel flow rate of the water gap is 3-5t/min, the depth of the water gap inserted into the crystallizer is 130-150 mm; when the molten steel flow rate of the water gap is 4-7t/min, the depth of the water gap inserted into the crystallizer is 150-180mm; when the molten steel flux of the water gap is more than 7t/min, the depth of the water gap inserted into the crystallizer is between 180mm and 200 mm.
The invention has the beneficial effects that:
compared with the prior art, the invention reduces the impact of the molten steel which just flows into the crystallizer at the position of the water gap on the original liquid molten steel in the crystallizer and reduces the fluctuation of the liquid level by guiding the liquid molten steel in the tundish into the crystallizer through the plurality of water gaps of the submerged water gap system.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a submerged entry nozzle.
Reference numerals: the device comprises a tundish 1, an immersion type water gap system 2, a crystallizer 3, a molten steel outlet 21 and a water gap 22.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and embodiments may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 2, in the embodiment of the present invention, the process layout scheme includes: the arrangement of the tundish 1, the submerged nozzle system 2 and the crystallizer 3 is that as shown in fig. 1, the tundish 1, the submerged nozzle system 2 and the crystallizer 3 are arranged in sequence along the flowing direction of molten steel; the using method is the using method of the submerged nozzle system 2;
optionally, the tundish 1 is a buffer of liquid molten steel, the volume of the buffer is 50t, and the liquid molten steel in the buffer flows into the crystallizer 3 through the submerged nozzle system 2; the submerged entry nozzle system 2 comprises 3 nozzles 22, and as shown in fig. 2, molten steel flows into the mold through 6 molten steel outlets of the 3 nozzles 22 in a dispersed manner. The crystallizer 3 comprises 4 copper plates, namely 2 wide copper plates and 2 narrow copper plates; 4 copper plates surround to form a cavity, and liquid molten steel enters the cavity to finish primary cooling to form a primary blank shell. The wide-face copper plate is 1500mm wide, 35mm thick and planar in surface, in the embodiment, each nozzle 22 is provided with 2 molten steel outlets, and in different embodiments, each nozzle 22 can also be provided with more or less molten steel outlets 21.
Optionally, the number of the water gaps 22 depends on the width of the produced casting blank and the distance between the water gaps 22, the distance between the water gaps 22 and the copper plate on the side of the mold 3 is 300mm, and the distance between the adjacent water gaps 22 is 450mm. The insertion depth of the water gap 22 is 140mm,150mm and 140mm in sequence, the liquid level fluctuation is less than +/-3 mm, and the molten steel flow of the water gap 22 is 3t/min.
A use method of the water gap 22 applies the process arrangement structure of the water gap 22, and adjusts the number of the water gaps 22, the depth of the water gap 22 inserted into the crystallizer 3 and the molten steel flux of the water gap 22 according to the process requirements.
The number of the water gaps 22 depends on the width of the produced casting blank and the distance between the adjacent water gaps 22, and the distance between the adjacent water gaps 22 is not less than 150mm in order to avoid the liquid level fluctuation of the molten steel in the crystallizer caused by the mutual impact of the upper circulating flows of the molten steel sprayed by the water gaps 22. In order to avoid that the molten steel sprayed out of the water gap 22 seriously erodes the crystallizer 3 and leads to the reduction of the service life of the crystallizer 3, the distance between the water gap 22 and the copper plate at the side surface of the crystallizer 3 is not less than 100mm.
The depth of the water gap 22 inserted into the crystallizer 3 is based on the fluctuation condition of the liquid level of the crystallizer 3, the ratio of the fluctuation of the liquid level to be less than +/-3 mm is more than 95%, and the ratio of +/-5 mm is more than 99%, the depth of the water gap 22 inserted into the crystallizer 3 is between 100mm and 200mm, and when the pulling speed is increased and the fluctuation of the liquid level of the crystallizer 3 is overlarge, the depth of the water gap 22 inserted into the crystallizer 3 is increased.
The molten steel flow of the water gap 22 is not more than 10t/min. When the molten steel flux of the water gap 22 is less than 3t/min, the depth of the water gap 22 inserted into the crystallizer 3 is less than 130mm; when the molten steel flow of the water gap 22 is 3-5t/min, the depth of the water gap 22 inserted into the crystallizer 3 is 130-150 mm; when the molten steel flow of the water gap 22 is 4-7t/min, the depth of the water gap 22 inserted into the crystallizer 3 is 150-180mm; when the molten steel flux of the water gap 22 is more than 7t/min, the depth of the water gap 22 inserted into the crystallizer 3 is between 180mm and 200 mm.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. A process arrangement for a nozzle, characterized by: the submerged nozzle system comprises at least two nozzles, and one end of each nozzle, which is far away from the tundish, is inserted into the crystallizer and movably arranged in the crystallizer along the extending direction of the crystallizer.
2. A process arrangement for a nozzle as claimed in claim 1, wherein: the number of the water gaps is not more than ten.
3. A process arrangement for a nozzle as claimed in claim 1, wherein: the crystallizer is a rectangular body, and a cavity is surrounded by 2 oppositely arranged wide copper plates and 2 oppositely arranged narrow copper plates and is used for completing primary cooling to form a primary blank shell.
4. A process arrangement for a nozzle as claimed in claim 3, wherein: the width of the wide copper plate is not less than 900mm, the thickness of the wide copper plate is not more than 50mm, and the surface of the wide copper plate is a plane.
5. A method of using a nozzle, comprising: the process arrangement of the nozzle according to any of claims 1 to 4 is applied and the number of nozzles, the depth of insertion of the nozzle into the crystallizer and the molten steel flux of the nozzle are adjusted according to the process requirements.
6. A method of using a nozzle as claimed in claim 5, wherein: the number of the water gaps depends on the width of a produced casting blank and the distance between the adjacent water gaps, and in order to avoid the liquid level fluctuation of the molten steel in the crystallizer caused by the mutual impact of the upper circulating flows of the molten steel sprayed by the water gaps, the distance between the adjacent water gaps is not less than 150mm.
7. A method of using a nozzle as claimed in claim 6, wherein: in order to avoid that the service life of the crystallizer is reduced because molten steel sprayed from the water gap seriously erodes the crystallizer, the distance between the water gap and the side copper plate of the crystallizer is not less than 100mm.
8. A method of using a nozzle as claimed in claim 5, wherein: the depth of the water gap inserted into the crystallizer is based on the fluctuation condition of the liquid level of the crystallizer, the ratio of the fluctuation of the liquid level to be less than +/-3 mm is greater than 95%, and the ratio of +/-5 mm is greater than 99%, the depth of the water gap inserted into the crystallizer is between 100mm and 200mm, and when the pulling speed is increased and the fluctuation of the liquid level of the crystallizer is overlarge, the depth of the water gap inserted into the crystallizer is increased.
9. A method of using a nozzle as claimed in claim 5, wherein: the molten steel flux of the water gap is not more than 10t/min.
10. A method of using a nozzle as claimed in claim 9, wherein: when the molten steel flux of the water gap is less than 3t/min, the depth of the water gap inserted into the crystallizer is less than 130mm; when the molten steel flux of the water gap is 3-5t/min, the depth of the water gap inserted into the crystallizer is 130-150 mm; when the molten steel flow rate of the water gap is 4-7t/min, the depth of the water gap inserted into the crystallizer is 150-180mm; when the molten steel flux of the water gap is more than 7t/min, the depth of the water gap inserted into the crystallizer is between 180mm and 200 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210858733.3A CN115338397A (en) | 2022-07-20 | 2022-07-20 | Process arrangement structure of water gap and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210858733.3A CN115338397A (en) | 2022-07-20 | 2022-07-20 | Process arrangement structure of water gap and using method |
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| Publication Number | Publication Date |
|---|---|
| CN115338397A true CN115338397A (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210858733.3A Pending CN115338397A (en) | 2022-07-20 | 2022-07-20 | Process arrangement structure of water gap and using method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201455251U (en) * | 2009-08-10 | 2010-05-12 | 鞍钢股份有限公司 | Combined device of plate blank continuous casting crystallizer for submersed nozzle defection flow injection |
| CN102319885A (en) * | 2011-09-28 | 2012-01-18 | 中冶南方工程技术有限公司 | Continuous casting method and device for double-nozzle cast ultra-thick plate blank |
| CN102764865A (en) * | 2012-06-26 | 2012-11-07 | 中冶南方工程技术有限公司 | Submersed nozzle for high-casting-speed continuous casting crystallizer |
| CN202701328U (en) * | 2012-08-23 | 2013-01-30 | 北京科技大学 | Gating system for pouring wide and thick slab by two water gaps |
| CN214349589U (en) * | 2020-12-30 | 2021-10-08 | 江苏龙泰合金科技有限公司 | Two-hole submerged nozzle for high-pulling-speed billet continuous casting crystallizer |
| CN218361966U (en) * | 2022-07-20 | 2023-01-24 | 中冶赛迪工程技术股份有限公司 | Crystallizer water gap arrangement structure |
-
2022
- 2022-07-20 CN CN202210858733.3A patent/CN115338397A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201455251U (en) * | 2009-08-10 | 2010-05-12 | 鞍钢股份有限公司 | Combined device of plate blank continuous casting crystallizer for submersed nozzle defection flow injection |
| CN102319885A (en) * | 2011-09-28 | 2012-01-18 | 中冶南方工程技术有限公司 | Continuous casting method and device for double-nozzle cast ultra-thick plate blank |
| CN102764865A (en) * | 2012-06-26 | 2012-11-07 | 中冶南方工程技术有限公司 | Submersed nozzle for high-casting-speed continuous casting crystallizer |
| CN202701328U (en) * | 2012-08-23 | 2013-01-30 | 北京科技大学 | Gating system for pouring wide and thick slab by two water gaps |
| CN214349589U (en) * | 2020-12-30 | 2021-10-08 | 江苏龙泰合金科技有限公司 | Two-hole submerged nozzle for high-pulling-speed billet continuous casting crystallizer |
| CN218361966U (en) * | 2022-07-20 | 2023-01-24 | 中冶赛迪工程技术股份有限公司 | Crystallizer water gap arrangement structure |
Non-Patent Citations (1)
| Title |
|---|
| 中国金属学会: "2006年全国轧钢生产技术会议文集", 31 May 2006, pages: 108 * |
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