CN111922309A - Method for protecting pouring of continuous casting tundish - Google Patents
Method for protecting pouring of continuous casting tundish Download PDFInfo
- Publication number
- CN111922309A CN111922309A CN202010694053.3A CN202010694053A CN111922309A CN 111922309 A CN111922309 A CN 111922309A CN 202010694053 A CN202010694053 A CN 202010694053A CN 111922309 A CN111922309 A CN 111922309A
- Authority
- CN
- China
- Prior art keywords
- tundish
- hole
- covering
- pouring
- molten steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000009749 continuous casting Methods 0.000 title claims abstract description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 89
- 229910052786 argon Inorganic materials 0.000 claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 23
- 241000209094 Oryza Species 0.000 claims abstract description 10
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 10
- 235000009566 rice Nutrition 0.000 claims abstract description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims abstract description 8
- 239000002893 slag Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000005266 casting Methods 0.000 claims 3
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 238000004321 preservation Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing 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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
-
- 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
- B22D11/11—Treating the molten metal
- B22D11/111—Treating the molten metal by using protecting powders
-
- 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
- B22D11/11—Treating the molten metal
- B22D11/116—Refining the metal
- B22D11/117—Refining the metal by treating with gases
-
- 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
Abstract
The invention relates to a method for protecting pouring of a continuous casting tundish, which comprises the following steps: s1, after the tundish roaster is lifted, the argon filling pipe is arranged at the roasting hole (argon filling hole) and the impact hole, and after the tundish flat car is started, the argon valve is completely opened; s2, opening a ladle sliding water gap, feeding tundish covering agents when molten steel of the tundish flows into about 25 tons, and feeding the tundish covering agents sequentially from a baking hole, wherein the feeding standard is 60-80 kg/hole, S3, closing an argon filling switch of the tundish after the feeding of the tundish covering agents is finished, withdrawing an argon filling pipe, continuously feeding rice hull ash for covering and heat preservation, and feeding standard 2 bags/hole; s4: after covering of a tundish covering agent and rice hull ash is finished, pouring the tundish, and adding crystallizer covering slag into the copper pipe when molten steel in the copper pipe submerges a lower opening of the submerged nozzle, wherein the crystallizer covering slag completely covers the liquid level of the molten steel; by the method, argon filling efficiency is improved, contact between molten steel and air is reduced, and the aim of reducing secondary oxidation of the molten steel is fulfilled.
Description
Technical Field
The invention belongs to the field of smelting, and particularly relates to a method for protecting pouring of a continuous casting tundish.
Background
After the tundish is built, the interior of the tundish is filled with air, so that secondary oxidation of the topping furnace is serious, and the cleanliness of the billet is influenced. The pouring protection of the continuous casting tundish is directly influenced by the quality of the argon filling effect of the tundish, the currently used tundish cover generally comprises a stopper rod hole, a baking hole (argon filling hole) and an impact hole, the stopper rod hole has a better sealing effect due to the existence of the stopper rod, and the baking hole and the impact hole generally adopt the argon filling operation to perform the pouring protection, but the argon filling mode is the same for all parts, so the argon filling effect is different, and the pouring protection of the tundish is further influenced;
chinese patent CN105964998A discloses a method and a device for filling argon into a continuous casting tundish, wherein an argon filling pipeline is arranged in a tundish cover, but the argon filling pipe is adopted for filling argon, and the concepts are different;
in conclusion, how to reduce the contact between molten steel and air and achieve the purpose of reducing the secondary oxidation of molten steel is a problem which needs to be solved urgently by researchers of the company.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to reduce the contact between molten steel and air;
in order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a method for protecting pouring of a continuous casting tundish, which comprises the following steps:
s1, after the tundish roaster is lifted, the argon filling pipe is arranged at the roasting hole (argon filling hole) and the impact hole, and after the tundish flat car is started, the argon valve is completely opened; s2, opening a ladle sliding water gap, feeding tundish covering agents when molten steel of the tundish flows into about 25 tons, and feeding the tundish covering agents sequentially from a baking hole, wherein the feeding standard is 60-80 kg/hole, S3, closing an argon filling switch of the tundish after the feeding of the tundish covering agents is finished, withdrawing an argon filling pipe, continuously feeding rice hull ash for covering and heat preservation, and feeding standard 2 bags/hole; s4: and after the covering of the tundish covering agent and the rice hull ash is finished, the tundish is poured, and crystallizer covering slag is added into the copper pipe when the molten steel in the copper pipe submerges the lower opening of the submerged nozzle and completely covers the liquid level of the molten steel.
In the scheme, the covering agent and the rice hull ash are coated in the middle to play roles in preserving heat and isolating air;
when it is necessary to charge the tundish covering agent into the holes, the tundish covering agent is first charged into the side-stream baking holes, and then sequentially charged into the baking holes adjacent to the impingement holes.
In order to concretely explain the concrete structure of the argon filling pipe, the argon filling pipe comprises a first pipe body and an I-shaped second pipe body; a plurality of air outlet holes are formed in the second pipe body.
Argon is filled into the tundish through the first pipe body and the second pipe body; the argon filling area of the second pipe body in the I shape is increased compared with that of the first pipe body which is directly introduced into the tundish.
In this scheme, the centre package is fixed at the centre package flatcar, and the centre package flatcar is sent the centre package from toasting the displacement to the position of watering.
The invention has the beneficial effects that: the invention relates to a method for protecting the pouring of a continuous casting tundish, which improves the argon filling efficiency, reduces the contact between molten steel and air and achieves the aim of reducing the secondary oxidation of the molten steel.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the construction of the tundish cover of the present invention;
FIG. 2 is a schematic view of an argon-filled tube configuration of the present invention;
FIG. 3 is a schematic view of the argon-filled tube of the present invention in cooperation with a tundish cover;
in the figure: 1-argon filling pipe, 2-baking hole, 3-impact hole, 4-first pipe body, 5-second pipe body and 6-air outlet hole.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1-2, the present invention is a method for protecting the pouring of a continuous casting tundish, comprising the steps of: s1, after the tundish roaster is lifted, the argon filling pipe 1 is arranged at the roasting hole 2 (argon filling hole) and the impact hole 3, and after the tundish flat car is started, the argon valve is completely opened; s2, opening a ladle sliding water gap, feeding tundish covering agents when molten steel of the tundish flows into about 25 tons, sequentially feeding the tundish covering agents from a baking hole 2, wherein the feeding standard is 60-80 kg/hole, and S3, closing an argon filling switch of the tundish after the feeding of the tundish covering agents is finished, withdrawing an argon filling pipe 1, continuously feeding rice hull ash for covering and heat preservation, and feeding standard 2 bags/hole; s4: and after the covering of the tundish covering agent and the rice hull ash is finished, the tundish is poured, and crystallizer covering slag is added into the copper pipe when the molten steel in the copper pipe submerges the lower opening of the submerged nozzle and completely covers the liquid level of the molten steel.
As shown in fig. 1, in this embodiment, 3 baking holes and 1 impact hole are provided.
In the scheme, the covering agent and the rice hull ash are coated in the middle to play roles in preserving heat and isolating air;
when it is necessary to charge the tundish covering agent into the holes, the tundish covering agent is first charged into the side-stream baking holes, and then sequentially charged into the baking holes adjacent to the impingement holes.
As shown in fig. 3, in order to specifically describe the specific structure of the argon-filled tube, the argon-filled tube 1 of the present invention includes a first tube 4 and a second tube 5 in the shape of "i"; a plurality of air outlet holes 6 are arranged on the second pipe body 5.
Argon is filled into the tundish through the first pipe body and the second pipe body; the argon filling area of the second pipe body in the I shape is increased compared with that of the first pipe body which is directly introduced into the tundish.
The first pipe body is made of a steel pipe with the diameter of 10mm, one end of the first pipe body is connected with an argon valve, the other end of the first pipe body is connected with the second pipe body, the second pipe body is welded into an I shape by the steel pipe with the diameter of 6mm, and the air outlet is arranged in a size mode to ensure that the flow is 10 NL/min.
In this scheme, the centre package is fixed at the centre package flatcar, and the centre package flatcar is sent the centre package from toasting the displacement to the position of watering.
How to extend the argon filling pipe into the tundish, the diameter of a circle where two parallel pipe bodies on the second pipe body are located is smaller than that of the baking hole.
Thus, when in operation, one pipe body firstly passes through the baking hole, and then the other pipe body passes through the baking hole.
The invention relates to a method for protecting the pouring of a continuous casting tundish, which improves the argon filling efficiency, reduces the contact between molten steel and air and achieves the aim of reducing the secondary oxidation of the molten steel.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (4)
1. A method for protecting pouring of a continuous casting tundish is characterized by comprising the following steps: comprises the following steps:
s1: after the tundish roaster is lifted, the argon filling pipe extends into a roasting hole and an impact hole which are formed on a tundish cover, and argon is introduced into the tundish;
s2: opening a sliding water gap of a steel ladle above the tundish, and when 25 tons of molten steel are stored in the tundish, pouring a tundish covering agent into the tundish from the baking hole, wherein the standard of the pouring is 60-80 kg/hole;
s3: after the pouring of the tundish covering agent is finished, stopping introducing argon, withdrawing the argon filling pipe, continuously pouring rice hull ash into the baking hole, covering and preserving heat, and pouring standard 2 bags/hole;
s4: and after the covering of the tundish covering agent and the rice hull ash is finished, the tundish is poured, and crystallizer covering slag is added into the copper pipe when the molten steel in the copper pipe submerges the lower opening of the submerged nozzle and completely covers the liquid level of the molten steel.
2. The method of continuous casting tundish casting according to claim 1, wherein the method comprises: when pouring the tundish covering agent, the tundish covering agent is poured in from the baking holes far away from the impact holes in sequence.
3. The method of continuous casting tundish casting according to claim 1, wherein the method comprises: the argon filling pipe comprises a first pipe body and an I-shaped second pipe body;
a plurality of air outlet holes are formed in the second pipe body.
4. The method of continuous casting tundish casting according to claim 1, wherein the method comprises: the tundish is arranged on the movable tundish flat car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010694053.3A CN111922309A (en) | 2020-07-17 | 2020-07-17 | Method for protecting pouring of continuous casting tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010694053.3A CN111922309A (en) | 2020-07-17 | 2020-07-17 | Method for protecting pouring of continuous casting tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111922309A true CN111922309A (en) | 2020-11-13 |
Family
ID=73313808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010694053.3A Withdrawn CN111922309A (en) | 2020-07-17 | 2020-07-17 | Method for protecting pouring of continuous casting tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111922309A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0857599A (en) * | 1994-08-26 | 1996-03-05 | Nisshin Steel Co Ltd | Method and device for removing slag in tundish and continuous casting apparatus |
| KR20050006402A (en) * | 2003-07-08 | 2005-01-17 | 주식회사 포스코건설 | A device for pouring the molten metal in continuous steel casting |
| CN104278197A (en) * | 2014-10-16 | 2015-01-14 | 江苏省沙钢钢铁研究院有限公司 | Smelting method of steel for low-silicon high-titanium welding wire |
| CN110722148A (en) * | 2019-10-22 | 2020-01-24 | 芜湖新兴铸管有限责任公司 | Tundish argon gas replacement device and tundish argon gas replacement method |
| WO2020045544A1 (en) * | 2018-08-31 | 2020-03-05 | Ｊｆｅスチール株式会社 | Method for starting continuous casting of steel |
-
2020
- 2020-07-17 CN CN202010694053.3A patent/CN111922309A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0857599A (en) * | 1994-08-26 | 1996-03-05 | Nisshin Steel Co Ltd | Method and device for removing slag in tundish and continuous casting apparatus |
| KR20050006402A (en) * | 2003-07-08 | 2005-01-17 | 주식회사 포스코건설 | A device for pouring the molten metal in continuous steel casting |
| CN104278197A (en) * | 2014-10-16 | 2015-01-14 | 江苏省沙钢钢铁研究院有限公司 | Smelting method of steel for low-silicon high-titanium welding wire |
| WO2020045544A1 (en) * | 2018-08-31 | 2020-03-05 | Ｊｆｅスチール株式会社 | Method for starting continuous casting of steel |
| CN110722148A (en) * | 2019-10-22 | 2020-01-24 | 芜湖新兴铸管有限责任公司 | Tundish argon gas replacement device and tundish argon gas replacement method |
Non-Patent Citations (1)
| Title |
|---|
| 刘文凭: "J65Mn 钢中夹杂物控制技术研究", 《中国优秀硕士论文全文数据库》 * |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201113 |