CN106513611A - Continuous casting process for producing 450mm extremely-thick plate blank on straight arc-shaped continuous casting machine - Google Patents
Continuous casting process for producing 450mm extremely-thick plate blank on straight arc-shaped continuous casting machine Download PDFInfo
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- CN106513611A CN106513611A CN201610902079.6A CN201610902079A CN106513611A CN 106513611 A CN106513611 A CN 106513611A CN 201610902079 A CN201610902079 A CN 201610902079A CN 106513611 A CN106513611 A CN 106513611A
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- continuous casting
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- molten steel
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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
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
-
- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/22—Controlling or regulating processes or operations for cooling cast stock or mould
- B22D11/225—Controlling or regulating processes or operations for cooling cast stock or mould for secondary cooling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention relates to a continuous casting process for producing a 450mm extremely-thick plate blank on a straight arc-shaped continuous casting machine. The continuous casting process comprises the steps that the specification range of a casting blank is adjusted to be 450mm*(1600mm-2600mm), a large tundish is utilized, dummy ingot sealing operation is achieved, and a tundish water gap is subjected to centring; qualified molten steel is injected into the large tundish, a tundish covering agent is added into the molten steel, crystallizer casting powder matched with the molten steel is selected, cold steel quenching and slag adding operation is carried out on the inner molten steel face of a crystallizer, the typical pull speed is controlled to range from 0.30 m/min to 0.55 m/min, and the typical superheat temperature is controlled to range from 20 DEG C to 30 DEG C; and a crystallizer expert system is used for avoiding the bleed-out risk in the casting process, and the dynamic secondary cooling technology and the dynamic soft reduction technology are used for preventing straightening cracks from being generated in the casting process. According to the continuous casting process, the defect that bulging and straightening cracks are prone to happening in the casting process of 450mm large-thickness plate blanks and the like is overcome, the production efficiency is improved, and the cost is greatly reduced.
Description
Technical field
The invention belongs to continuous-casting of steel billet technical field, and in particular to produce 450mm extra-thick plate blanks using straight circular-arc type continuous casting machine
Continuous casting process.
Background technology
With flourishing for the industries such as naval vessel, ocean platform, low-temperature pressure container, skyscraper, weight equipment manufacture,
The demand of special heavy plate is increased year by year, many steel mills all Program Construction special heavy plate conticasters, special thick stock is provided for super-heavy plate mill
Material.
At present, special heavy plate blank is produced still using molding or vertical continuous casting method.Steel for example for more than 100mm
Plate, substantially all with large steel ingot as raw material, the production method become a useful person using two fire, to ensure that steel plate obtains enough compression ratios.It is existing
Mold with the presence of special heavy plate or vertical continuous casting low production efficiency, energy consumption is big, the problems such as production cost is high.
And continuous cast method has that production procedure is short, production efficiency is high, it is energy-saving the features such as, more suitable for the system of slab
Make.But continuous cast method is mainly or for producing thin blank, for special thick stock yet suffers from many production difficulties.How use connects
The method of casting is always the focus of continuous casting worker research to produce high-quality extra-thick plate blank, due to strand dimensions greatly, generally
Think to be also easy to produce bulge and straightening cracks by the way of straight circular-arc type continuous casting machine manufactures big thickness slab, surface quality is difficult to protect
Card.
The content of the invention
It is an object of the invention to provide a kind of continuous casting process for producing 450mm extra-thick plate blanks on straight circular-arc type continuous casting machine, gram
Big thickness slab easy bulge and straightening cracks in casting process such as 450mm are taken, improve production efficiency, have been greatly reduced into
This.
The present invention the adopted technical scheme that solves the above problems is：It is special that one kind produces 450mm on straight circular-arc type continuous casting machine
The continuous casting process of heavy slab, comprises the steps：Adjustment casting blank specification scope be 450mm ×（1600mm～2600mm）, use
Big tundish, carries out envelope dummy ingot operation, and centering water-coating port carries out centering；Qualified molten steel is injected toward big tundish, in molten steel
Covering agent in addition, selects and the matched crystallizer protecting residue of molten steel, to the cold steel of Mold millet cake, adds slag behaviour
Make, typical casting speed control is controlled at 20 DEG C～30 DEG C in 0.30m/min～0.55 m/min, the typical degree of superheat；Using crystallizer
Expert system avoids bleed-out risk in casting process, avoids producing in casting process using dynamic secondary cooling and dynamic soft reduction technology
Straightening cracks.
Alternatively, according to steel grade C content using corresponding dynamic secondary cooling target temperature it is
Straight circular-arc type continuous casting machine of the straight circular-arc type continuous casting machine of the present invention from arc radius R11m.
Compared with prior art, it is an advantage of the current invention that：The present invention produces 450mm special heavy plates by straight circular-arc type continuous casting machine
In 0.30～0.55 m/min, the typical degree of superheat is controlled at 20～30 DEG C the typical casting speed control of base, to Mold face
The cold steel of point, plus slag operation, it is to avoid straightening cracks, improve production efficiency, are greatly reduced cost, realize 450mm extra-thick plate blanks
Continuous casting, improve production efficiency.
In addition, according to the dynamic control in dynamic secondary cooling area to Preform surface temperature, billet surface crackle can be avoided
Formed.
Specific embodiment
With reference to embodiments the present invention is described in further detail.
The special thickness continuous casting billets of 450mm are produced on the straight circular-arc type continuous casting machine of arc radius R11m, and step is as follows,
Ladle is hung in into continuous caster turret：
（1）Adjustment casting blank specification scope is 450mm* (1600mm～2600mm).
（2）Carry out the envelope dummy ingot operation of conticaster.
（3）Using big tundish, centering water-coating port carries out centering.
（4）Covering agent in addition, using matched crystallizer protecting residue.
（5）Typical casting speed control is controlled at 20 DEG C～30 DEG C in 0.30m/min～0.55 m/min, the typical degree of superheat；Make
Precise manipulation is carried out with mold expert system and avoids bleed-out risk in casting process, using dynamic secondary cooling and dynamic soft-reduction skill
Art produces face crack in avoiding casting process.
（6）Dynamic secondary cooling target temperature is selected according to steel grade C content, 1 is shown in Table.
1 dynamic secondary cooling target temperature of table
（7）Obtain qualified 450mm extra-thick plate blanks.
By above-mentioned processing step, the cooperation in particular by dynamic secondary cooling and dynamic soft-reduction both techniques is realized
The technique for producing the special thickness continuous casting billets of 450mm on straight circular-arc type continuous casting machine.Avoid and wipe the drum for confusing the presence of special heavy plate continuous casting
Tripe and straightening cracks defect.
In addition to the implementation, present invention additionally comprises there is other embodiment, all employing equivalents or equivalence replacement
The technical scheme that mode is formed, all should fall within the scope of the hereto appended claims.
Claims (2)
1. it is a kind of on straight circular-arc type continuous casting machine produce 450mm extra-thick plate blanks continuous casting process, it is characterised in that：Adjustment casting blank specification
Scope be 450mm ×（1600mm～2600mm）, using big tundish, envelope dummy ingot operation is carried out, centering water-coating port carries out centering；
Qualified molten steel is injected toward big tundish, covering agent in adding in molten steel is selected and the matched crystallizer protection of molten steel
Slag, to the cold steel of Mold millet cake, adds slag operation, and typical casting speed control is in 0.30m/min～0.55 m/min, typical mistake
Temperature is controlled at 20 DEG C～30 DEG C；Bleed-out risk in casting process is avoided using mold expert system, using dynamic secondary cooling and
Dynamic soft reduction technology produces straightening cracks in avoiding casting process, wherein dynamic secondary cooling target temperature is set according to steel grade C content
It is set to
。
2. the continuous casting process for producing 450mm extra-thick plate blanks on straight circular-arc type continuous casting machine according to claim 1, its feature exists
In：Straight circular-arc type continuous casting machine of the straight circular-arc type continuous casting machine from arc radius R11m.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610902079.6A CN106513611A (en) | 2016-10-17 | 2016-10-17 | Continuous casting process for producing 450mm extremely-thick plate blank on straight arc-shaped continuous casting machine |
| PCT/CN2017/098391 WO2018072550A1 (en) | 2016-10-17 | 2017-08-22 | Continuous casting process for producing 450 mm ultra-thick blank on straight arc continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610902079.6A CN106513611A (en) | 2016-10-17 | 2016-10-17 | Continuous casting process for producing 450mm extremely-thick plate blank on straight arc-shaped continuous casting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106513611A true CN106513611A (en) | 2017-03-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610902079.6A Pending CN106513611A (en) | 2016-10-17 | 2016-10-17 | Continuous casting process for producing 450mm extremely-thick plate blank on straight arc-shaped continuous casting machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106513611A (en) |
| WO (1) | WO2018072550A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018072550A1 (en) * | 2016-10-17 | 2018-04-26 | 江阴兴澄特种钢铁有限公司 | Continuous casting process for producing 450 mm ultra-thick blank on straight arc continuous casting machine |
| CN110016626A (en) * | 2019-05-07 | 2019-07-16 | 南京钢铁股份有限公司 | A kind of production method improving low Grade Pipeline Steel surface quality |
| CN110066965A (en) * | 2019-05-13 | 2019-07-30 | 南京钢铁股份有限公司 | A kind of production method improving thin gauge pipeline steel surface quality |
| CN110157978A (en) * | 2019-05-07 | 2019-08-23 | 南京钢铁股份有限公司 | A kind of production method improving Hi-grade steel pipeline steel surface quality |
| CN110181004A (en) * | 2018-04-26 | 2019-08-30 | 江阴兴澄特种钢铁有限公司 | A kind of detection method judging continuous casting and solidifying green shell according to dotted crack position |
| CN115747659A (en) * | 2022-11-29 | 2023-03-07 | 湖南华菱湘潭钢铁有限公司 | Production method of large-piece-weight extra-thick continuous casting slab for wind power |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018072550A1 (en) * | 2016-10-17 | 2018-04-26 | 江阴兴澄特种钢铁有限公司 | Continuous casting process for producing 450 mm ultra-thick blank on straight arc continuous casting machine |
| CN110181004A (en) * | 2018-04-26 | 2019-08-30 | 江阴兴澄特种钢铁有限公司 | A kind of detection method judging continuous casting and solidifying green shell according to dotted crack position |
| CN110181004B (en) * | 2018-04-26 | 2021-07-23 | 江阴兴澄特种钢铁有限公司 | Detection method for judging continuous casting solidified blank shell according to point crack positions |
| CN110016626A (en) * | 2019-05-07 | 2019-07-16 | 南京钢铁股份有限公司 | A kind of production method improving low Grade Pipeline Steel surface quality |
| CN110157978A (en) * | 2019-05-07 | 2019-08-23 | 南京钢铁股份有限公司 | A kind of production method improving Hi-grade steel pipeline steel surface quality |
| CN110016626B (en) * | 2019-05-07 | 2020-12-18 | 南京钢铁股份有限公司 | Production method for improving surface quality of low-steel-grade pipeline steel |
| CN110066965A (en) * | 2019-05-13 | 2019-07-30 | 南京钢铁股份有限公司 | A kind of production method improving thin gauge pipeline steel surface quality |
| CN115747659A (en) * | 2022-11-29 | 2023-03-07 | 湖南华菱湘潭钢铁有限公司 | Production method of large-piece-weight extra-thick continuous casting slab for wind power |
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| Publication number | Publication date |
|---|---|
| WO2018072550A1 (en) | 2018-04-26 |
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