CN102266921B - Method for regulating conicity change under resistance to widening of continuous casting crystallizer on line - Google Patents
Method for regulating conicity change under resistance to widening of continuous casting crystallizer on line Download PDFInfo
- Publication number
- CN102266921B CN102266921B CN 201110233077 CN201110233077A CN102266921B CN 102266921 B CN102266921 B CN 102266921B CN 201110233077 CN201110233077 CN 201110233077 CN 201110233077 A CN201110233077 A CN 201110233077A CN 102266921 B CN102266921 B CN 102266921B
- Authority
- CN
- China
- Prior art keywords
- tapering
- obstructed
- crystallizer
- change
- wide
- 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
Images
Landscapes
- Casting Devices For Molds (AREA)
Abstract
The invention provides a method for regulating conicity change under resistance to widening of continuous casting crystallizer on line. The method comprises a step of introducing a stroke obstruction working condition during width increase of the crystallizer into an online adjustment width increase process by taking solidification and contraction of a solidified shell as a starting point so as to determine control parameters of a conical degree change process of a casting machine, namely a conical degree adjustment acceleration and a conical degree adjustment resetting time, so that reliable guarantee is provided for secure and continuous production of the casting machine. The method has great significance for reduction of the production cast, improvement of the production quality, increase of the metal yield and enhancement of the market competitive power.
Description
Technical field
Tapering change process when the online hot adjustment width increase process of the online tapering change of continuous cast mold technical field, especially continuous cast mold that the present invention relates to is obstructed.
Background technology
Continuous cast mold is the heart of continuous casting, can directly affect slab quality and steel grade adaptability.For adapting to the requirement of continuous casting and rolling production frequent variations, crystallizer often need to be adjusted the strand that width obtains different size.In addition, for improving the operating rate of conticaster, also need to obtain uninterrupted production continuously of conticaster.For this reason, people develop the continuous need of production of the multiple rules strand of adaptation, shorten the continuous on-line width adjustment technology of crystallizer of producing time, reduction labour intensity, improving slab quality.But after causing continuous cast mold to adjust online the width stroke to be obstructed for the special operation condition that may occur, recover rapidly the initial tapering of casting machine, realize that the technology of safety in production just seems more important.Real-time online tapering change technology is kept the safety in production for continuous casting, reduces production accident, and the aspects such as raising operating rate all have extremely important effect.
Tradition on-line width adjustment technology transfers the urgency of wide speed to increase and anxious subtracting because crystallizer upper and lower opening speed difference causes transferring the instantaneous pressure variation effect that in wide process, hydraulic cylinder occurs, and it is unfavorable that equipment is used; In addition, there is adverse effect in this process of billet withdrawal and continuously normal diabatic process of also exchanging wide process high temperature coagulation base shell, easily safety in production is impacted.
Based on above-mentioned situation, be necessary to develop a kind of method that is applicable to continuously online tapering change when adjusting continuous cast mold width increase process and being obstructed, to adapt to the continuous need of production of multiple rules strand, shorten and produce time, reduce labour intensity, improve the quality of strand.
Summary of the invention
Technical problem to be solved by this invention is: a kind of method that tapering change when being obstructed for continuous cast mold on-line width adjustment width increase process is provided.The method simple and feasible, after being obstructed for the wide process of the online hot accent of continuous casting production process, the tapering change provides approach easily, gives security thereby produce for the continuous casting safe and continuous.
The present invention solves its technical problem and adopts following technical scheme:
The method of tapering change when adjusting online width increase process and be obstructed for continuous cast mold provided by the invention, specifically: with base shell solidification shrinkage as starting point, stroke in crystallizer width increase process is obstructed, and operating mode is real-time to be imported in the process of adjusting online the width increase, determine control parameter in casting machine tapering change process with this, for the safe and continuous production of casting machine provides Reliable guarantee.
The method of described tapering change when adjusting online width increase process and be obstructed for continuous cast mold, its step comprises:
The first step, judge the interval of being obstructed:
At first, step wide according to current accent judged the interval of being obstructed, and confirms that delay process starts from the crystallizer cone adjusting or narrow limit translation width increases process.Be obstructed if start from the crystallizer cone adjusting, carry out be obstructed tapering change of cone adjusting; Be obstructed if start from mould at narrow translation width increase process, transfer be obstructed tapering change of wide translation;
Second step, tapering change process acceleration:
Tapering change acceleration can be determined by formula (1):
（1）
In formula, a is tapering change acceleration; Vc is the strand casting speed; Tan θ transfers in wide process, tapering default angle value after changing; Tan α is when transferring wide the beginning, the angle value of the initial tapering of crystallizer;
The 3rd step, tapering change process time:
The tapering change time is obstructed in cone adjusting can be definite by formula (2):
In formula, t is the tapering change time; L is the actual use height of crystallizer; Δ L
/Tapering change amount when transferring wide being obstructed; Vc is the strand casting speed; Tan θ transfers in wide process, tapering default angle value after changing; Tan α is when transferring wide the beginning, the angle value of the initial tapering of crystallizer;
Transferring wide translation to be obstructed the tapering change time can be definite by formula (3)
（3）
In formula, t is the tapering change time; L is the actual use height of crystallizer; H is the crystallizer height; Vc is the strand casting speed;
Change tapering acceleration and the change tapering time of the present invention by setting, just can know in detail that tapering changes each stage, carry out the online tapering change of continuous cast mold.
The present invention compared with prior art has following main beneficial effect:
This method simple and feasible, easy to operate.by considering that casting blank solidification shrinks characteristics, tapering corresponding under default different operating modes changes process, the essential characteristic of utilizing the natural shrinking amount of high temperature billet shell in the process of setting of tapering change and molten steel to conform to, the process of billet withdrawal of high temperature billet shell is limited on the mould at narrow copper coin of adjustment all the time, successfully overcome in the wide technique of traditional accent, the impact that crystallizer upper and lower opening speed difference causes the transient change of hydraulic cylinder in the translation process that equipment is caused, slow down and transfer in wide process, the wearing and tearing of molten steel to narrow copper plate, also stablized simultaneously the solidification heat transfer process of molten steel in continuous cast mold.
When transferring wide process to be obstructed, import in real time in the process that the adjustment width increases online by the operating mode of being obstructed with this process, determine fast the control parameter in casting machine tapering change process, comprise that tapering is adjusted acceleration and the tapering adjustment is required consuming time.When transferring wide process to be obstructed, set continuous, the stable course of action of normal hydraulic cylinder, when having solved the crystallizer on-line width modulation process and being obstructed, the potential threat that safety in production brings to continuous casting is for the safe and continuous production of casting machine provides reliable assurance.Therefore, when the method can realize that continuous cast mold on-line width adjustment width process is obstructed tapering continuously, stable change, for high efficiency continuous casting provides basic guarantee, to reducing production costs, improve the quality of production, increase recovery rate of iron, improve the competitiveness of product in market and all have very important meaning.
For example: in actual production, be 4.5 mm at the one-sided tapering of crystallizer, casting speed 1.0 m/min, both sides transfer wide degree to increase, in transferring wide process because the tapering cone adjusting causes one-sided top oil cylinder fault, this moment modulated cone 1.5 mm.In this process, need to adjust rapidly tapering and change the process that returns to normal production.In conventional procedure, when transferring wide fault to occur, often make stopping watering and process or to recover rapidly initial tapering than high acceleration, keep producing continuously.Stop watering to process and interrupted the default production schedule, continuous production is had a negative impact.And recover rapidly in initial tapering process, because tapering change acceleration is excessive, the translation that causes the solidified shell contraction change of initial solidification shell before going out crystallizer that meniscus begins to solidify not catch up with narrow copper plate changes, cause between solidified shell and mould at narrow copper coin effect of stress is arranged, high temperature coagulation base shell extruding copper plate of crystallizer, in the service life of reducing narrow face copper plate of crystallizer on the one hand, the normal freezing that affects on the other hand strand is shunk, and more is easy to cause continuous casting production hidden danger.
And by the wide process of the accent of setting in the method, will transfer wide process and process of billet withdrawal to mate, realize transferring wide process to conform to the solidification shrinkage of base shell.Occur in process in fault, actual condition is imported tapering change process, set the change cone process of the solidification shrinkage rate of change that meets the high temperature billet shell, namely become the cone acceleration and be 6.25 mm/min
2Make in transferring wide change cone process, the solidified shell that changes on the one hand has the support of mould at narrow copper coin, is not subject to again the extruding of copper coin simultaneously, and the unstressed base shell that causes is out of shape, slow down solidified shell to the wearing and tearing of narrow copper plate, reduce continuous casting billet defective generation probability, on the other hand, utilize the alternating movement simultaneously of cone adjusting process crystallizer upper and lower opening, the hydraulic cylinder travel continuous and even variation is very favourable to the equipment direct motion.
To sum up, the present invention improves the quality of production to reducing production costs, and improves recovery rate of iron, improves the competitiveness of product in market and has very important meaning.
Description of drawings
Fig. 1 is in example 1, the time shifting relation of the crystallizer correspondence suitable for reading that obtains in tapering change process.
Fig. 2 is in example 2, the time shifting relation of the crystallizer correspondence suitable for reading that obtains in tapering change process.
The specific embodiment
The method of tapering change when adjusting online width increase process and be obstructed for continuous cast mold provided by the invention, specifically: with base shell solidification shrinkage as starting point, stroke in crystallizer width increase process is obstructed, and operating mode is real-time to be imported in the process of adjusting online the width increase, determine control parameter in casting machine tapering change process with this, for the safe and continuous production of casting machine provides Reliable guarantee.
The method of described tapering change when adjusting online width increase process and be obstructed for continuous cast mold, its step comprises:
The first step, judge the interval of being obstructed:
At first, step wide according to current accent judged the interval of being obstructed, and confirms that delay process starts from the crystallizer cone adjusting or narrow limit translation width increases process.Be obstructed if start from the crystallizer cone adjusting, carry out be obstructed tapering change of cone adjusting; Be obstructed if start from mould at narrow translation width increase process, transfer be obstructed tapering change of wide translation;
Second step, tapering change process acceleration:
Tapering change acceleration can be determined by formula (1):
In formula, a is tapering change acceleration; Vc is the strand casting speed; Tan θ transfers in wide process, tapering default angle value after changing; Tan α is when transferring wide the beginning, the angle value of the initial tapering of crystallizer;
The 3rd step, tapering change process time:
The tapering change time is obstructed in cone adjusting can be definite by formula (2):
In formula, t is the tapering change time; L is the actual use height of crystallizer; Δ L
/Tapering change amount when transferring wide being obstructed; Vc is the strand casting speed; Tan θ transfers in wide process, tapering default angle value after changing; Tan α is when transferring wide the beginning, the angle value of the initial tapering of crystallizer;
Transferring wide translation to be obstructed the tapering change time can be definite by formula (3)
In formula, t is the tapering change time; L is the actual use height of crystallizer; H is the crystallizer height; Vc is the strand casting speed;
Change tapering acceleration and the change tapering time of the present invention by setting, just can know in detail that tapering changes each stage, carry out the online tapering change of continuous cast mold.
Below in conjunction with specific embodiments and the drawings, the present invention is further elaborated, but does not limit the present invention.
Embodiment 1:
Be 4.5 mm at the one-sided tapering of continuous cast mold, transferring wide process tapering recruitment is 4.5 mm, casting speed 1.0 m/min, crystallizer height 900 mm, meniscus level 800 mm, because the tapering cone adjusting causes top oil cylinder fault, this moment, modulated cone 1.5 mm, obtained acceleration and tapering change time relationship in corresponding tapering change process in transferring wide process.
As the above analysis, transfer wide procedure fault to appear at the cone adjusting process.Transfer that in wide process, relevant parameter can be set to:
tanα=4.5/900， tanθ=(4.5+4.5)/900，V
c=1000 mm/min，
l=800 mm，
ΔL / =1.5 mm
Therefore:
1. tapering changes acceleration:
2. tapering changes process time:
The present embodiment 1 is in tapering change process, and the time shifting relation of the crystallizer correspondence suitable for reading that it obtains as shown in Figure 1.As shown in Figure 1: this process resets by the correction that once becomes cone process implementation tapering via trouble-free bottom oil cylinder.When fault occurs, actual condition is imported in tapering change process, obtaining tapering change acceleration is 6.25 mm/min
2, utilize this acceleration to act on rapidly the bottom oil cylinder, the cylinder action continuous and even variation.Changing to reach at tapering needs change amount one half (0.75 mm), and oil cylinder begins slow deceleration, until reach step change tapering process, realizes initial tapering change amount (1.5 mm).Action is completed, and continuous casting production is not stagnated.
Guarantee on the one hand in this process that crystallizer becomes the cone correction procedure and conforms to the casting blank solidification contraction, the base shell is not subjected to stress deformation, crystallizer is not produced extra accent wide-wheel grinding and damages.Realize to transfer on the other hand the continuous and even variation of wide process, use tool to have very important significance to the long service life of Width adjusting device.
In a word, tapering change process when this process is obstructed via the change of tapering repeatedly process implementation crystallizer width increase process is for during continuous casting produces, continuously, efficient, stable, safety in production provides necessary guarantee.
Embodiment 2:
Be 9 mm at the one-sided tapering of continuous cast mold, transferring wide process tapering recruitment is 9 mm, casting speed 0.8 m/min, crystallizer height 900 mm, meniscus level 800 mm, owing to transferring wide translation to cause top oil cylinder fault, obtain acceleration and tapering change time relationship in corresponding tapering change process in transferring wide process.
As the above analysis, transfer wide procedure fault to appear at and transfer wide translation process.Transfer that in wide process, relevant parameter can be set to:
tanα=9/900， tanθ=(9+9)/900，V
c=800 mm/min，
l=800 mm，
H=900 mm
Therefore:
1. tapering changes acceleration:
2. tapering changes process time:
The present embodiment 2 is in tapering change process, and the time shifting relation of the crystallizer correspondence suitable for reading that it obtains as shown in Figure 2.As shown in Figure 2: this process resets by the correction that once becomes cone process implementation tapering via trouble-free bottom oil cylinder.When fault occurs, actual condition is imported in tapering change process, obtaining tapering change acceleration is 8 mm/min
2, utilize this acceleration to act on rapidly the bottom oil cylinder, the cylinder action continuous and even variation.Changing to reach at tapering needs change amount one half (4.5 mm), and oil cylinder begins slow deceleration, until reach step change tapering process, realizes initial tapering change amount (9 mm).Action is completed, and continuous casting production is not stagnated.
Guarantee on the one hand in this process that crystallizer becomes the cone correction procedure and conforms to the casting blank solidification contraction, the base shell is not subjected to stress deformation, crystallizer is not produced extra accent wide-wheel grinding and damages.Realize to transfer on the other hand the continuous and even variation of wide process, use tool to have very important significance to the long service life of Width adjusting device.
In a word, tapering change process when this process is obstructed via the change of tapering repeatedly process implementation crystallizer width increase process is for during continuous casting produces, continuously, efficient, stable, safety in production provides necessary guarantee.
Claims (2)
1. the method for tapering change when an online adjustment continuous cast mold width increase process is obstructed, it is characterized in that with base shell solidification shrinkage as starting point, stroke in crystallizer width increase process is obstructed, and operating mode is real-time to be imported in the process of adjusting online the width increase, determine control parameter in casting machine tapering change process with this: comprise that tapering is adjusted acceleration and resetting time is adjusted in cone adjusting, for the safe and continuous production of casting machine provides Reliable guarantee;
When described crystallizer on-line width modulation process was obstructed, the control parameter of tapering change process was obtained by following method, and its step comprises:
The first step, judge the interval of being obstructed:
At first, step wide according to current accent judged the interval of being obstructed, and confirms that delay process starts from the crystallizer cone adjusting or narrow limit translation width increases process; Be obstructed if start from the crystallizer cone adjusting, carry out be obstructed tapering change of cone adjusting; Be obstructed if start from mould at narrow translation width increase process, transfer be obstructed tapering change of wide translation;
Second step, tapering change process acceleration:
Tapering change acceleration is determined by formula (1):
In formula: a is tapering change acceleration; V
cBe the strand casting speed; Tan θ transfers in wide process, tapering default angle value after changing; Tan α is when transferring wide the beginning, the angle value of the initial tapering of crystallizer; L is the actual use height of crystallizer;
The 3rd step, tapering change process time:
Cone adjusting tapering change time of being obstructed is determined by formula (2):
In formula: t is the tapering change time; L is the actual use height of crystallizer; Δ L
/Tapering change amount when transferring wide being obstructed; Vc is the strand casting speed; Tan θ transfers in wide process, tapering default angle value after changing; Tan α is when transferring wide the beginning, the angle value of the initial tapering of crystallizer;
Transferring wide translation to be obstructed the tapering change time can be definite by formula (3)
In formula: t is the tapering change time; L is the actual use height of crystallizer; H is the crystallizer height; Vc is the strand casting speed.
2. the purposes of the method for tapering change when adjusting online width increase process and be obstructed for continuous cast mold claimed in claim 1, control parameter setting when it is characterized in that the method by the wide parameter of accent of setting and transferring wide process to be obstructed, to know that tapering changes each stage, adjust the continuous cast mold tapering, reach the safety in production requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110233077 CN102266921B (en) | 2011-08-15 | 2011-08-15 | Method for regulating conicity change under resistance to widening of continuous casting crystallizer on line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110233077 CN102266921B (en) | 2011-08-15 | 2011-08-15 | Method for regulating conicity change under resistance to widening of continuous casting crystallizer on line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102266921A CN102266921A (en) | 2011-12-07 |
| CN102266921B true CN102266921B (en) | 2013-06-19 |
Family
ID=45049487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110233077 Active CN102266921B (en) | 2011-08-15 | 2011-08-15 | Method for regulating conicity change under resistance to widening of continuous casting crystallizer on line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102266921B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601336B (en) * | 2012-03-23 | 2013-11-20 | 中冶南方工程技术有限公司 | Method for online adjusting width increase of crystallizer continuously |
| CN110947924B (en) * | 2018-09-27 | 2021-07-20 | 上海宝信软件股份有限公司 | On-line thermal width adjusting method suitable for crystallizer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3133549B2 (en) * | 1993-04-13 | 2001-02-13 | 住友重機械工業株式会社 | Oxide superconducting conductor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03133549A (en) * | 1989-10-19 | 1991-06-06 | Kawasaki Steel Corp | Method for changing width of cast slab at the time of continuous casting |
| IT1262073B (en) * | 1993-02-16 | 1996-06-19 | Danieli Off Mecc | LINGOTTIERA FOR CONTINUOUS CASTING OF THIN SLABS |
| DE4309592C1 (en) * | 1993-03-22 | 1994-04-21 | Mannesmann Ag | Mould for continuous casting with adjustable width - has linear bearings to keep the broad-side plates at given distance and to take up clamping force |
| DE19748305A1 (en) * | 1997-10-31 | 1999-05-06 | Schloemann Siemag Ag | Continuous casting mold |
| DE10116087A1 (en) * | 2001-03-30 | 2002-10-10 | Sms Demag Ag | Adjustable mold divider for installation in a conventional slab mold |
| CN1254330C (en) * | 2004-03-01 | 2006-05-03 | 北京科技大学 | Technology of on-line control crystalizer narrow surface taper |
-
2011
- 2011-08-15 CN CN 201110233077 patent/CN102266921B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3133549B2 (en) * | 1993-04-13 | 2001-02-13 | 住友重機械工業株式会社 | Oxide superconducting conductor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102266921A (en) | 2011-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102266920B (en) | Method for changing conical degree at moment of obstructing process of on-line width reduction of continuous casting crystallizer | |
| CN102240783B (en) | Online adjusting method for extensively reducing width of continuous casting mold | |
| CN104399923B (en) | A kind of method producing special heavy plate continuous casting billet | |
| CN106513617A (en) | Device and method for improving casting blank quality of continuous casting production | |
| CN103212674B (en) | A kind of steel plate ingot casting device and the method with this device production super-thick steel plate ingot casting | |
| CN102189102A (en) | Method for rolling liquid core under heavy reduction rate by virtue of online thickness regulating roll by utilizing continuous casting machine | |
| CN102240787B (en) | Method for increasing online adjusting width of continuous casting crystallizer within large range | |
| CN103567409B (en) | Method for on-line width adjusting of continuous casting | |
| CN202270944U (en) | Extra-thick slab casting machine | |
| CN102615268A (en) | Antigravity squeeze casting device of aluminum alloy connecting rod and manufacture method | |
| CN101791681B (en) | Water-cooling die casting production process of plate blank used for medium plate | |
| CN102266921B (en) | Method for regulating conicity change under resistance to widening of continuous casting crystallizer on line | |
| CN103464699B (en) | A kind of method improving continuous casting tundish heat exchange success rate | |
| CN102240788B (en) | Online width-increasing adjustment method for continuous casting crystallizer in small range | |
| US20130248056A1 (en) | Method for enhancing the self-feeding ability of a heavy section casting blank | |
| CN102601326B (en) | Method for continuously and rapidly adjusting width increase of mold in online manner | |
| CN102240782B (en) | Method for reducing online adjusting width of continuous casting crystallizer within small range | |
| CN102581237B (en) | Method for rapidly adjusting width increase of mold in online stepped manner | |
| CN103008596B (en) | System and method for hot billet pressure control for round billet continuous caster | |
| CN104772444A (en) | Control method for reducing tail shrinkage hole of square billet | |
| CN115401178A (en) | Screw-down process determination method for improving internal quality of gear steel | |
| CN201922005U (en) | Continuous casting crystallizer capable of realizing uniform heat transfer in metal initial solidification areas | |
| CN102601328B (en) | Multistep method for online adjusting width decrease of crystallizer rapidly | |
| CN105195702A (en) | Continuous casting water cooling adjustment technological structure | |
| CN102601336B (en) | Method for online adjusting width increase of crystallizer continuously |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201130 Address after: No.28 Shuguang Xili, Chaoyang District, Beijing 100028 Patentee after: China Metallurgical Industry Co., Ltd Address before: 430223. 33, University Road, East Lake New Technology Development Zone, Wuhan, Hubei Patentee before: China Metallurgical South Engineering Technology Co.,Ltd. |