CN112404382B - Method for reducing bow defects of casting blank of ultra-wide slab continuous casting machine - Google Patents
Method for reducing bow defects of casting blank of ultra-wide slab continuous casting machine Download PDFInfo
- Publication number
- CN112404382B CN112404382B CN202011184851.8A CN202011184851A CN112404382B CN 112404382 B CN112404382 B CN 112404382B CN 202011184851 A CN202011184851 A CN 202011184851A CN 112404382 B CN112404382 B CN 112404382B
- Authority
- CN
- China
- Prior art keywords
- casting blank
- water distribution
- ultra
- blank
- nozzle
- 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.)
- Active
Links
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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a method for reducing the bow defects of a casting blank of an ultra-wide slab continuous casting machine, which comprises the following steps: adding a pulse water distribution function at the horizontal section; the nozzle in the middle of the inner arc reduces the water amount by 5 percent; the method adopts the real dynamic secondary cooling water distribution, and the ultra-wide slab continuous casting machine adopts infrared detection to detect the temperature of the casting blank out of the fan-shaped section; the blockage condition of the secondary cooling water nozzle is effectively monitored by adopting the nozzle detection function of the roll gap instrument; optimizing the dynamic soft reduction function, and setting 10 roll gaps and soft reduction models according to different steel types, wherein the soft reduction is 1.6-3.2 mm; according to the reduction amount, the materials are proportionally distributed on 2 fan-shaped sections. The invention improves the blank shape control capability of the casting blank and can effectively avoid the defect of the bow-shaped blank shape of the casting blank.
Description
Technical Field
The invention relates to the technical field of continuous casting billet processing, in particular to a method for reducing the bow-shaped defect of a casting billet of an ultra-wide slab continuous casting machine.
Background
With the rapid development and large-scale of high-end manufacturing industries such as petroleum delivery pipelines, nuclear power boilers and the like in China, in order to reduce the manufacturing cost, the cost processing and manufacturing industry puts higher requirements on a raw material plate (coil) used by the industry, and the outstanding characteristics are that the size is larger, the quality is higher, and the product performance is more stable, so that a plate blank required by rolling the plate blank is required to have good quality and an oversized width.
Disclosure of Invention
The invention aims to provide a method for reducing the bow-shaped defect of a casting blank of an ultra-wide slab continuous casting machine, which improves the control capability of the casting blank and can effectively avoid the bow-shaped defect of the casting blank.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for reducing the bow defects of a casting blank of an ultra-wide slab continuous casting machine comprises the following steps:
(1) the pulse water distribution function is added in the horizontal section, the cooling water quantity of the inner arc at low pulling speed is reduced, and the bow problem caused by supercooling of the casting blank of the inner arc is reduced; when the pulling speed is lower than 1.1m/min and kept for more than 3min, the secondary cooling pulse water distribution can be automatically opened, and the secondary cooling water of the horizontal section is closed at intervals; the pulse water distribution is provided with a plurality of tables, and a pulse water distribution meter can be selected according to the specific situation of field production;
(2) the nozzle in the middle of the inner arc reduces the water amount by 5 percent;
(3) the method adopts real dynamic secondary cooling water distribution, the ultra-wide slab continuous casting machine adopts infrared detection to detect the temperature of the casting blank out of the fan-shaped section, and the proper amount of water required by the cooling of the casting blank is reversely pushed according to the cooling relation, so that the real dynamic water distribution function is achieved; after dynamic water distribution is adopted, the arch defect of the casting blank is obviously improved;
(4) the blockage condition of the secondary cooling water nozzle is effectively monitored by adopting the nozzle detection function of the roll gap instrument;
(5) optimizing the dynamic soft reduction function, and formulating 10 roll gaps and soft reduction models according to different steel types, wherein the soft reduction is 1.6-3.2 mm; according to the reduction amount, the materials are proportionally distributed on 2 fan-shaped sections.
The invention has the following beneficial effects: the method for reducing the bow-shaped defects of the casting blank of the ultra-wide slab continuous casting machine adopts the dynamic water distribution and water distribution principle, the retention time, the soft reduction adjustment and the model, the inner arc water reduction and water quantity and the secondary cold water roll gap detection functions, improves the blank shape control capability of the casting blank, and can effectively avoid the bow-shaped blank shape defects of the casting blank.
Detailed Description
A method for reducing the bow defects of a casting blank of an ultra-wide slab continuous casting machine comprises the following steps:
(1) the pulse water distribution function is added in the horizontal section, the cooling water quantity of the inner arc at low pulling speed is reduced, and the bow problem caused by supercooling of the casting blank of the inner arc is reduced; when the pulling speed is lower than 1.1m/min and kept for more than 3min, the secondary cooling pulse water distribution can be automatically opened, and the secondary cooling water of the horizontal section is closed at intervals; the pulse water distribution is provided with a plurality of tables, and a pulse water distribution meter can be selected according to the specific situation of field production;
(2) the nozzle in the middle of the inner arc reduces the water amount by 5 percent;
(3) the method adopts real dynamic secondary cooling water distribution, the ultra-wide slab continuous casting machine adopts infrared detection to detect the temperature of the casting blank out of the fan-shaped section, and the proper amount of water required by the cooling of the casting blank is reversely pushed according to the cooling relation, so that the real dynamic water distribution function is achieved; after dynamic water distribution is adopted, the arch defect of the casting blank is obviously improved;
(4) the blockage condition of the secondary cooling water nozzle is effectively monitored by adopting the nozzle detection function of the roll gap instrument; the ultra-wide slab caster is very difficult to inspect the nozzle on line manually, the problem is effectively solved by adopting a roll gap instrument to detect the blockage condition of the nozzle, the blockage condition of the nozzle is effectively detected, the blocked nozzle is timely treated, and the detection qualified rate is up to more than 96%.
(5) The dynamic soft reduction function is optimized, the casting blank arch is easy to cause when the reduction is too small, and the casting blank is easy to deform and the equipment is easy to damage due to large running resistance when the reduction is too large. According to different steel grades, 10 roll gaps and light reduction models are made, and the light reduction is 1.6-3.2 mm; according to the reduction amount, the steel plate is proportionally distributed on 2 fan-shaped sections, so that the bow problem of the casting blank is effectively solved.
The method for reducing the bow-shaped defects of the casting blank of the ultra-wide slab continuous casting machine adopts the dynamic water distribution and water distribution principle, the retention time, the soft reduction adjustment and the model, the inner arc water reduction and water quantity and the secondary cold water roll gap detection functions, improves the blank shape control capability of the casting blank, and can effectively avoid the bow-shaped blank shape defects of the casting blank.
Claims (1)
1. The method for reducing the bow defects of the casting blank of the ultra-wide slab continuous casting machine is characterized by comprising the following steps of:
(1) the pulse water distribution function is added in the horizontal section, the cooling water quantity of the inner arc at low pulling speed is reduced, and the bow problem caused by supercooling of the casting blank of the inner arc is reduced; when the pulling speed is lower than 1.1m/min and kept for more than 3min, the secondary cooling pulse water distribution can be automatically opened, and the secondary cooling water of the horizontal section is closed at intervals; the pulse water distribution is provided with a plurality of tables, and a pulse water distribution meter can be selected according to the specific situation of field production;
(2) the nozzle in the middle of the inner arc reduces the water amount by 5 percent;
(3) dynamic secondary cooling water distribution is adopted, the temperature of the casting blank outlet fan-shaped section of the ultra-wide slab continuous casting machine is detected by infrared, and the proper amount of water required by the cooling of the casting blank is reversely pushed according to the cooling relation, so that the function of dynamic water distribution is achieved; after dynamic water distribution is adopted, the arch defect of the casting blank is obviously improved;
(4) the blockage condition of the secondary cooling water nozzle is effectively monitored by adopting the nozzle detection function of the roll gap instrument;
(5) optimizing the dynamic soft reduction function, and formulating 10 roll gaps and soft reduction models according to different steel types, wherein the soft reduction is 1.6-3.2 mm; according to the reduction amount, the materials are proportionally distributed on 2 fan-shaped sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011184851.8A CN112404382B (en) | 2020-10-30 | 2020-10-30 | Method for reducing bow defects of casting blank of ultra-wide slab continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011184851.8A CN112404382B (en) | 2020-10-30 | 2020-10-30 | Method for reducing bow defects of casting blank of ultra-wide slab continuous casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112404382A CN112404382A (en) | 2021-02-26 |
| CN112404382B true CN112404382B (en) | 2022-03-08 |
Family
ID=74826950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011184851.8A Active CN112404382B (en) | 2020-10-30 | 2020-10-30 | Method for reducing bow defects of casting blank of ultra-wide slab continuous casting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112404382B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113927004A (en) * | 2021-09-08 | 2022-01-14 | 山东钢铁集团日照有限公司 | Method for prolonging online service life of Danieli slab caster |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10263778A (en) * | 1997-03-24 | 1998-10-06 | Kawasaki Steel Corp | Method for secondarily cooling cast slab in continuous casting |
| CN202006272U (en) * | 2011-03-04 | 2011-10-12 | 上海梅山钢铁股份有限公司 | Horizontal segment cooling device of continuous casting machine |
| CN108356242A (en) * | 2018-04-13 | 2018-08-03 | 东北大学 | A kind of micro alloyed steel sheet billet Corner Crackss control equipment and technique |
| CN108543922A (en) * | 2018-07-03 | 2018-09-18 | 东北大学 | Fan-shaped section secondary cooling system is used under a kind of solidification end weight |
-
2020
- 2020-10-30 CN CN202011184851.8A patent/CN112404382B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10263778A (en) * | 1997-03-24 | 1998-10-06 | Kawasaki Steel Corp | Method for secondarily cooling cast slab in continuous casting |
| CN202006272U (en) * | 2011-03-04 | 2011-10-12 | 上海梅山钢铁股份有限公司 | Horizontal segment cooling device of continuous casting machine |
| CN108356242A (en) * | 2018-04-13 | 2018-08-03 | 东北大学 | A kind of micro alloyed steel sheet billet Corner Crackss control equipment and technique |
| CN108543922A (en) * | 2018-07-03 | 2018-09-18 | 东北大学 | Fan-shaped section secondary cooling system is used under a kind of solidification end weight |
Non-Patent Citations (2)
| Title |
|---|
| 宽厚板铸坯中间裂纹缺陷的研究与控制;于铭杰;《莱钢科技》;20160615(第03期);28-30 * |
| 连铸坯的形状缺陷;卢盛意;《连铸》;19950515(第05期);19-23 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112404382A (en) | 2021-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112404382B (en) | Method for reducing bow defects of casting blank of ultra-wide slab continuous casting machine | |
| CN109967528A (en) | A method of prevent hot-strip SPHC high temperature coiling from scratching | |
| CN102921750A (en) | Method for removing bright trace on surface of strip steel | |
| CN104889358A (en) | Method for controlling surface cracks of continuous casting slab | |
| CN111155046A (en) | Air knife control device and method for hot galvanizing unit | |
| CN107552753B (en) | Water distribution process of secondary cooling chamber in molten steel continuous casting process | |
| CN103357661B (en) | A kind of universal rolling technique of round steel | |
| CN203750993U (en) | Integrated inclined and longitudinal rolling anchor rod rolling mill | |
| CN203356560U (en) | Device for removing slag on surface of continuous casting billet | |
| CN109365543B (en) | Control system and method for hot rolling rough rolling final stand rolling mill in fault state | |
| CN102371284A (en) | Dual-descaling method for hot rolling strip steel slab | |
| CN112742880B (en) | Method for controlling head and tail shapes of narrow-specification steel plates through local temperature difference | |
| CN202638906U (en) | Surface blowing and sweeping device for hot rolling product | |
| CN204672698U (en) | A kind of hot rolled rod, the pre-water-cooling apparatus control system of wire rod | |
| CN110355216B (en) | Control method for eliminating tail transverse vibration line offset of short-process thin strip steel | |
| CN104438380B (en) | Four-roller reversible type rolling mill side-spraying sweeping system | |
| CN101954382B (en) | High-speed wire rod water-cooling backward control method | |
| CN203541473U (en) | Continuous casting secondary cooling water spray strip base tube automatic water distribution device | |
| CN203816412U (en) | Water spray dust removal system of rough mill | |
| CN201871535U (en) | High-pressure latex spraying and cleaning device of roller | |
| CN204234461U (en) | A kind of edger roll of energy cancellation band steel surface point line defect | |
| CN205834146U (en) | The chiller of the secondary cooling section of continuous caster improved | |
| CN201399473Y (en) | Roller cooling water assembly | |
| CN202606538U (en) | Automatic control device of bending rollers | |
| CN204227860U (en) | Edge purging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |