CN108296463A - The method for controlling the continuous casting production degree of superheat - Google Patents
The method for controlling the continuous casting production degree of superheat Download PDFInfo
- Publication number
- CN108296463A CN108296463A CN201711021951.7A CN201711021951A CN108296463A CN 108296463 A CN108296463 A CN 108296463A CN 201711021951 A CN201711021951 A CN 201711021951A CN 108296463 A CN108296463 A CN 108296463A
- Authority
- CN
- China
- Prior art keywords
- ladles
- continuous casting
- duration
- heat
- outlet temperature
- 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.)
- Granted
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
- B22D11/10—Supplying or treating molten metal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of methods of the control continuous casting production degree of superheat, when (1) duration of heat is more than 45 minutes, 1590 °C ± 3 °C of A class ladles outlet temperature, and when the duration of heat≤45 minute, 1587 °C 1592 °C of A2 ladles outlet temperature；(2) when the duration of heat is more than 45 minutes, 1590 °C ± 3 °C of A class ladles outlet temperature；(3) when the duration of heat≤45 minute, 1587 °C ± 5 °C of A2 ladles outlet temperature, liquidus temperature is more than 1528 °C；(4) when the duration of heat≤40 minute, 1587 °C ± 7 °C of A2 ladles outlet temperature；(5) alloy is added and lime melts and top slag deoxidation finishes, 5kg carbon dusts are added at intervals of two minutes, current curve fluctuates in 20mm up and down；(6) argon flow amount is controlled to soft blow pattern, per minute to reduce by 1 °C；(7) 3 °C are reduced per line feeding 100m.The present invention takes optimize technique measure, controls the steel-making continuous casting tundish degree of superheat, improves the coincidence rate of the continuous casting production degree of superheat, reduces continuous casting billet internal flaw, improves steel grade continuous casting billet internal soundness.
Description
Technical field
The invention belongs to steelmaking technical field, especially a kind of method of the continuous casting control continuous casting production degree of superheat.
Background technology
Continuous casting production Prepared by Low Superheat Pouring be continuous casting process it is stable and obtain the high-quality most important technology of strand it
One, if in the high degree of superheat, steel billet green shell can be made to be thinned, molten steel is easy to secondary oxidation, and field trash increases, and easily rouses
A series of quality of production accidents such as tripe, bleed-out, column crystal prosperity, center segregation, shrinkage cavity.Steel-making enterprise slab caster is produced
Most of slab supply hot rolling and Heavy Plate Plant as raw material, the rolling characteristic because of hot rolling and cut deal compared with small reduction ratio, just
It is required that the slab quality provided must be zero defect slab, packet degree of superheat hit rate in conticaster is improved in steel-making region, is to connect
Casting machine obtains one of the important technical parameter of defect free slab.
First have to consider is smoothly to produce steel billet：Tundish temperature is too low（It is near or below the liquidus curve temperature of steel grade
Degree）, molten steel " tied " in mold gap can be caused；Tundish temperature is too high, be easy to cause bleed-out.Both of which is not
Production can be allowed smooth.
Followed by consider the quality requirement of specific steel grade：Surface quality, low multiple quality, component segregation, degree of purity etc..
It is generally believed that higher degree of superheat Surface Quality, degree of purity have certain benefit, but to the control of low power shrinkage cavity, component segregation
It is unfavorable to make；Conversely, result is also substantially opposite.
About specific control method, each factory, the actual conditions of every producing line are different, tundish volume, ladle
Casting cycle, the Insulation etc. of volume, every stove steel.
Invention content
The purpose of the present invention is to provide a kind of method of the control continuous casting production degree of superheat, the present invention takes optimize technique
Measure can control the steel-making continuous casting tundish degree of superheat, improve the coincidence rate of the continuous casting production degree of superheat, reduce the interior of continuous casting billet
Portion's defect improves steel grade continuous casting billet internal soundness.
The object of the present invention is achieved like this：A method of the control continuous casting production degree of superheat,
(1) when the duration of heat is more than 45 minutes, 1590 °C ± 3 °C of A class ladles outlet temperature, when the duration of heat≤45 minute, A2
1587 °C -1592 °C of ladle outlet temperature；
(2) when the duration of heat is more than 45 minutes, 1590 °C ± 3 °C of A class ladles outlet temperature, big cross section strand allowed minus deviation,
Light section strand allows overgauge；
(3) when the duration of heat≤45 minute, 1587 °C ± 5 °C of A2 ladles outlet temperature, big cross section strand allowed minus deviation is small disconnected
Face allows overgauge, and liquidus temperature is more than 1528 °C of permission overgauges, but deviation range must not exceed ± 7 °C；
(4) when the duration of heat≤40 minute, 1587 °C ± 7 °C of A2 ladles outlet temperature, big cross section strand allowed minus deviation is small disconnected
Face strand allows overgauge；
(5) alloy is added before smelting molten steel and lime melts and top slag deoxidation finishes, 5kg carbon dusts are added at intervals of two minutes, electric current is bent
Line fluctuates in 20mm up and down；
(6) under electricity condition of not bothering to see me out, argon flow amount is controlled to soft blow pattern, and per minute to reduce by 1 °C, reduction is excessive, recompenses
Temperature；
(7) the pure forward and backward equal thermometric of calcium line is fed, 3 °C can be reduced per line feeding 100m, temperature of otherwise recompensing, compensation temperature control
At 5-10 °C.
A classes ladle is the ladle of continuous use.
A2 class ladles are the ladle that converter tapping is come under continuous casting platform within vacant 2 hours.
Invent the advantageous effect generated：
By taking the above measure, continuous casting production degree of superheat coincidence rate to rise to 98.4%, 2.1% is improved than before, effect
Obviously, the corner crack of continuous casting billet is substantially eliminated, the defects of central pipe.
This method is suitable for same type steel-making enterprise, to because of caused by continuous casting production degree of superheat problem in continuous casting billet
Portion's quality problems have greatly improved, and take the measure of optimize technique, and the internal flaw rate of continuous casting billet is made to be reduced to relatively low water
It is flat, improve the quality of continuous casting billet.
The present invention takes optimize technique measure, controls the steel-making continuous casting tundish degree of superheat, improves continuous casting production mistake
The coincidence rate of temperature reduces the internal flaw of continuous casting billet, improves steel grade continuous casting billet internal soundness.
Specific implementation mode
The technical solution further illustrated the present invention below by specific implementation mode
It is a kind of control the continuous casting production degree of superheat method include the following steps：
1, A class ladles when the duration of heat is more than 45 minutes, A class ladles are exactly the ladle being used continuously, and 1590 DEG C of outlet temperature is whole
Point temperature allows ± 2 DEG C, A2 ladles when the duration of heat≤45min, and A2 ladles refer to that converter tapping sky is come under continuous casting platform
Set ladle within 2 hours, 1591 DEG C of outlet temperature ,+4 DEG C of outlet temperature, big cross section（More than 1300*220mmg specifications strand) permit
Perhaps minus deviation, light section (specification strand between 950*220mm-1300*220mmg）Allow overgauge but deviation range must not surpass
Cross ± 5 DEG C.
2, A class ladle outlet temperatures allow ± 3 DEG C when the duration of heat is more than 45 minutes, and big cross section allowed minus deviation is small disconnected
Face allows overgauge but deviation range must not exceed 3 DEG C.
3, A2 ladles outlet temperature is 1587 DEG C when the duration of heat≤45min, and big cross section allowed minus deviation, light section allows
Overgauge but deviation range must not exceed ± 4 DEG C, and liquidus temperature is more than 1528 DEG C of permission overgauges but deviation range must not surpass
Cross ± 5 DEG C.
4, A2 ladles outlet temperature is 1590 DEG C when the duration of heat≤40min, and big cross section allowed minus deviation, light section allows
Overgauge but deviation range must not exceed ± 5 DEG C.
5, fusing is added in smelting molten steel high-volume early period alloy and lime and top slag deoxidation finishes, and adds every 2min small batches
Entering submerged arc agent, submerged arc agent is exactly C powder, each addition 5kg, and current curve fluctuates in 20mm up and down, such as：8 grades of power transmissions are every
4 DEG C of minute heating, does not consider the chemical heat generated, less than 4 DEG C it is contemplated that reducing continuous casting for packet time and temperature of recompensing.
6, under electricity condition of not bothering to see me out, argon flow amount is controlled to soft blow pattern, per minute to reduce by 1 DEG C, temperature of excessively recompensing
Degree.
7, it feeds thermometric before silk and feeds thermometric after silk, can be reduced by often feeding silk 100m silk threads by 3 DEG C, otherwise consider to recompense temperature
Degree.The above compensation temperature control is at 8 DEG C, according to the standby packet time adjustment of continuous casting.
Claims (3)
1. a kind of method of the control continuous casting production degree of superheat, it is characterised in that：
(1) when the duration of heat is more than 45 minutes, 1590 °C ± 3 °C of A class ladles outlet temperature, when the duration of heat≤45 minute, A2
1587 °C -1592 °C of ladle outlet temperature；
(2) when the duration of heat is more than 45 minutes, 1590 °C ± 3 °C of A class ladles outlet temperature, big cross section strand allowed minus deviation,
Light section strand allows overgauge；
(3) when the duration of heat≤45 minute, 1587 °C ± 5 °C of A2 ladles outlet temperature, big cross section strand allowed minus deviation is small disconnected
Face allows overgauge, and liquidus temperature is more than 1528 °C of permission overgauges, but deviation range must not exceed ± 7 °C；
(4) when the duration of heat≤40 minute, 1587 °C ± 7 °C of A2 ladles outlet temperature, big cross section strand allowed minus deviation is small disconnected
Face strand allows overgauge；
(5) alloy is added before smelting molten steel and lime melts and top slag deoxidation finishes, 5kg carbon dusts are added at intervals of two minutes, electric current is bent
Line fluctuates in 20mm up and down；
(6) under electricity condition of not bothering to see me out, argon flow amount is controlled to soft blow pattern, and per minute to reduce by 1 °C, reduction is excessive, recompenses
Temperature；
(7) the pure forward and backward equal thermometric of calcium line is fed, 3 °C can be reduced per line feeding 100m, temperature of otherwise recompensing, compensation temperature control
At 5-10 °C.
2. the method for the control continuous casting production degree of superheat according to claim 1, it is characterised in that：A class ladles are continuous
The ladle used.
3. the method for the control continuous casting production degree of superheat according to claim 1, it is characterised in that：A2 class ladles are from even
Ladle of the converter tapping within vacant 2 hours is come under casting platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021951.7A CN108296463B (en) | 2017-10-26 | 2017-10-26 | Method for controlling superheat degree of continuous casting tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711021951.7A CN108296463B (en) | 2017-10-26 | 2017-10-26 | Method for controlling superheat degree of continuous casting tundish |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108296463A true CN108296463A (en) | 2018-07-20 |
| CN108296463B CN108296463B (en) | 2021-01-01 |
Family
ID=62870154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711021951.7A Active CN108296463B (en) | 2017-10-26 | 2017-10-26 | Method for controlling superheat degree of continuous casting tundish |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108296463B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111715858A (en) * | 2020-06-30 | 2020-09-29 | 南阳汉冶特钢有限公司 | Production method for realizing low-superheat-degree continuous casting |
| CN111957918A (en) * | 2020-09-08 | 2020-11-20 | 福建三钢闽光股份有限公司 | Control method for stabilizing superheat degree of 400VN steel in starting process |
| CN115138816A (en) * | 2021-03-29 | 2022-10-04 | 上海梅山钢铁股份有限公司 | Integral control method for superheat range of multi-heat continuous casting tundish |
| CN116117095A (en) * | 2023-01-06 | 2023-05-16 | 江苏省沙钢钢铁研究院有限公司 | High-carbon steel wire rod and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1217959A (en) * | 1997-11-14 | 1999-06-02 | 中国科学技术大学 | Method for plasma heating ladle online to cast continuously at constant low overheated temperature |
| KR20030053729A (en) * | 2001-12-22 | 2003-07-02 | 주식회사 포스코 | Monitering system for temperature of melten steel in tundish |
| JP2009041842A (en) * | 2007-08-09 | 2009-02-26 | Nippon Steel Corp | In-ladle molten steel temperature measuring device |
| CN102974794A (en) * | 2012-11-23 | 2013-03-20 | 莱芜钢铁集团有限公司 | Device and method for reducing superheat degree of molten steel of continuous casting ladle or intermediate ladle |
| JP2013076133A (en) * | 2011-09-30 | 2013-04-25 | Nisshin Steel Co Ltd | Continuous casting method |
| CN104841901A (en) * | 2015-05-11 | 2015-08-19 | 首钢总公司 | Method for improving solidifying ditch on surface of ultra-low carbon steel continuous casting slab |
| KR20160032307A (en) * | 2014-09-15 | 2016-03-24 | 주식회사 포스코 | Apparatus for measuring level of molten steel in mold during startup period of casting process |
| CN106363149A (en) * | 2015-07-24 | 2017-02-01 | 上海梅山钢铁股份有限公司 | Dynamic temperature control system and control method in steel-making liquid steel continuous casting process |
| CN106480367A (en) * | 2015-08-28 | 2017-03-08 | 宝钢集团新疆八钢铁有限公司 | A kind of production method of high-strength cold-formed automobile axle housing steel |
| CN106938325A (en) * | 2017-03-08 | 2017-07-11 | 内蒙古包钢钢联股份有限公司 | The pouring procedure of low overheat rare earth steel and Aluminum steel |
-
2017
- 2017-10-26 CN CN201711021951.7A patent/CN108296463B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1217959A (en) * | 1997-11-14 | 1999-06-02 | 中国科学技术大学 | Method for plasma heating ladle online to cast continuously at constant low overheated temperature |
| KR20030053729A (en) * | 2001-12-22 | 2003-07-02 | 주식회사 포스코 | Monitering system for temperature of melten steel in tundish |
| JP2009041842A (en) * | 2007-08-09 | 2009-02-26 | Nippon Steel Corp | In-ladle molten steel temperature measuring device |
| JP2013076133A (en) * | 2011-09-30 | 2013-04-25 | Nisshin Steel Co Ltd | Continuous casting method |
| CN102974794A (en) * | 2012-11-23 | 2013-03-20 | 莱芜钢铁集团有限公司 | Device and method for reducing superheat degree of molten steel of continuous casting ladle or intermediate ladle |
| KR20160032307A (en) * | 2014-09-15 | 2016-03-24 | 주식회사 포스코 | Apparatus for measuring level of molten steel in mold during startup period of casting process |
| CN104841901A (en) * | 2015-05-11 | 2015-08-19 | 首钢总公司 | Method for improving solidifying ditch on surface of ultra-low carbon steel continuous casting slab |
| CN106363149A (en) * | 2015-07-24 | 2017-02-01 | 上海梅山钢铁股份有限公司 | Dynamic temperature control system and control method in steel-making liquid steel continuous casting process |
| CN106480367A (en) * | 2015-08-28 | 2017-03-08 | 宝钢集团新疆八钢铁有限公司 | A kind of production method of high-strength cold-formed automobile axle housing steel |
| CN106938325A (en) * | 2017-03-08 | 2017-07-11 | 内蒙古包钢钢联股份有限公司 | The pouring procedure of low overheat rare earth steel and Aluminum steel |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111715858A (en) * | 2020-06-30 | 2020-09-29 | 南阳汉冶特钢有限公司 | Production method for realizing low-superheat-degree continuous casting |
| CN111957918A (en) * | 2020-09-08 | 2020-11-20 | 福建三钢闽光股份有限公司 | Control method for stabilizing superheat degree of 400VN steel in starting process |
| CN111957918B (en) * | 2020-09-08 | 2021-10-26 | 福建三钢闽光股份有限公司 | Control method for stabilizing superheat degree of 400VN steel in starting process |
| CN115138816A (en) * | 2021-03-29 | 2022-10-04 | 上海梅山钢铁股份有限公司 | Integral control method for superheat range of multi-heat continuous casting tundish |
| CN116117095A (en) * | 2023-01-06 | 2023-05-16 | 江苏省沙钢钢铁研究院有限公司 | High-carbon steel wire rod and preparation method thereof |
| CN116117095B (en) * | 2023-01-06 | 2023-06-20 | 江苏省沙钢钢铁研究院有限公司 | High-carbon steel wire rod and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108296463B (en) | 2021-01-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108296463A (en) | The method for controlling the continuous casting production degree of superheat | |
| CN105018669B (en) | A kind of production method of nuclear power ingot iron | |
| CN110340315B (en) | Method for continuously casting martensitic stainless steel by using large-section rectangular billet | |
| CN101890492A (en) | Slag for liquid pouring of electroslag | |
| CN103184304A (en) | Technology for producing 38CrMoAl steel by converter-LF (low frequency)-RH (rockwell hardness)-continuous casting | |
| CN103911524B (en) | A kind of preparation method of copper rare earth binary intermediate alloy | |
| CN103667924B (en) | A kind of production method of 40Cr gren rod | |
| CN101837436B (en) | Function protecting material for special ASP ultra-low carbon continuous casting crystallizer | |
| CN105537549B (en) | The production method of 100 DEG C of low temperature seamless steel pipe steel continuous cast round billets | |
| CN106552910A (en) | A kind of continuous casting process for reducing wind-powered electricity generation medium carbon steel continuous cast round billets carbon segregation | |
| CN105316558A (en) | Preparation method of boron-containing steel preventing casting blank corner cracking | |
| CN103849710A (en) | Method for producing high-carbon-chromium bearing steel employing molten iron smelting process of electric furnace | |
| CN103757171A (en) | High vanadium ferroalloy smelting method and ingot mould for smelting high vanadium ferroalloy | |
| CN104480382A (en) | Method for preparing centrifugal nodular cast iron pipe | |
| CN102825236A (en) | Method for removing transverse crack defects of continuous casting billet corner of boron steel | |
| CN105154623A (en) | Efficient alloying method for smelting 38CrMoAl steel | |
| CN115261706B (en) | Preparation method of martensitic stainless steel continuous casting round billet for photovoltaic glass calendaring roller | |
| CN103436654A (en) | Low-cost production method for container steel casting blanks | |
| CN103146978B (en) | Method for producing high-chromium low-phosphorus electroslag steel for rollers | |
| CN104762488B (en) | A kind of method of direct vanadium alloying in esr process | |
| CN104109760A (en) | Steel ingot medium-frequency induction furnace/electroslag furnace dual-smelting system and method and steel ingot | |
| CN109112418B (en) | Continuous casting method of high manganese steel | |
| CN105624540A (en) | Control method of equiaxial crystal ratio of 30CrMo round pipe billet and steel casting blank | |
| CN116422853B (en) | Die steel and continuous casting production method thereof | |
| CN113388710A (en) | Smelting control method of ultrahigh-strength cord steel |
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 |