CN107790657B - Big camber radius plectane base compatibility conticaster and its technique - Google Patents
Big camber radius plectane base compatibility conticaster and its technique Download PDFInfo
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- CN107790657B CN107790657B CN201710996501.3A CN201710996501A CN107790657B CN 107790657 B CN107790657 B CN 107790657B CN 201710996501 A CN201710996501 A CN 201710996501A CN 107790657 B CN107790657 B CN 107790657B
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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
- B22D11/14—Plants for continuous casting
- B22D11/142—Plants for continuous casting for curved casting
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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
- B22D11/18—Controlling or regulating processes or operations for pouring
Abstract
The present invention discloses a kind of compatible conticaster of big camber radius round billet slab and its technique, it is therefore an objective to be able to produce macrostructure, the continuous casting steel billet that density reaches quality standards.It is 16.485m that equipment aspect, which is 600/700/800 round billet section of 16.5m big cross section φ increase camber radius in existing radius, and section is 200mm × (550~850) mm slab caster;By being formed after the tundish of round billet continuous casting machine, crystallizer, fan-shaped section, two cold steam discharges, withdrawal straightening machine, the transformation of automated procedures man-machine interface;Process aspect designs tundish immersed nozzle position, crystallizer size and taper value, slab fan-shaped section opening degree, and adjustment slab allows pulling rate, secondary cooling parameter and mode, secondary cooling water mouth zoning arrangement, changes withdrawal straightening machine pressure.The present invention realizes multibreak face conversion casting, is measured slab continuous casting billet density and is up to 7.924t/m3, much higher than the 7.850t/m of conventional plate blank3;Macrostructure center porosity is not more than 1.5 grades, and middle crack is not more than 1.5 grades.
Description
Technical field
The invention belongs to steels to produce continuous casting installation for casting field, be related to a kind of compatible conticaster of big camber radius round billet slab and
Its technique.
Background technique
For normal slab caster type with vertical bending type, arc radius is based on 6m~10m.Existing conticaster produces section
600/700/800 round billet continuous casting machine of φ, production type are round billet, design production capacity 50Wt/.
According to the market demand, big camber is now needed to have 200mm × (550~850) mm slab production capacity, design production capacity
Reach the conticaster of 50Wt/.Home and abroad there is no the pass of the compatible conticaster of big camber plectane base mutually to report.
Summary of the invention
The present invention discloses a kind of compatible conticaster of big camber radius round billet slab and technique, it is therefore an objective to use this compatibility continuous casting
The continuous casting steel billet that machine and process matched therewith are able to produce macrostructure, density reaches quality standards.
Technical solution, equipment aspect are that 600/700/800 round billet section of 16.5m big cross section φ increases camber in existing radius
Radius is 16.485m, and section is 200mm × (550~850) mm slab caster, by converting different crystallizer passes and attached
Belong to facility and realizes round billet production compatible with slab;
The compatible conticaster is by the tundish of round billet continuous casting machine, crystallizer, fan-shaped section, two cold row's steam, withdrawal straightening machine, fire
It is formed after cutting machine, ejection roller way, dummy bar, off-line device, the transformation of automated procedures man-machine interface;
The compatible continuous casting tundish is (1) in order to guarantee that invasive nozzle is in rectangular crystallizer center, rectangular bloom
Interior outer arc spacing center and round billet centre deviation 180mm, therefore (5) former round billet mouth of a river position is moved forward 180mm slab to after being transformed
(4), (3) former round billet mouth of a river center line moves to transformation after (2) slab mouth of a river center line, changes tundish immersion water for mouth of a river position
Mouth position, water outlet cross section (see Fig. 1);
The compatible conticaster plate slab crystallizer designs and manufactures based on retaining large round billet conticaster crystallizer, will
(6) the crystalliser of plate slab crystallizer (7) passes through connection bolt and is (8) fixed on original large round billet continuous casting machine crystallizer vibration platform frame
(9) upper (see Fig. 2), guarantees the fast and convenient replacement of crystallizer;Plate slab crystallizer, section is 200mm × (550~850) mm, wide
Degree is offline adjustable, offline to adjust wide movement;Plate slab crystallizer is consistent with original vibration interface, and the wide face of plate slab crystallizer is bolted
In crystalliser, wide face foot roller is fixed in crystalliser;Narrow copper plate is bolted on " plug-in type " support
On plate, narrow-face foot roller and nozzle are fixed in leptoprosopy support plate;
The compatible continuous casting machine fan-shaped segment is led in one section of round billet sector, a set of whole slab 1&2 sector of two fragment positions installation
To section;Fan-shaped 3~5 sections of similar 1&2 sections of design forms of sector and round billet section sequence correspond, and overall shrinkage roller arranges (see Fig. 3);
The compatible continuous casting machine tension leveling machine uses multipoint straightening, that is, utilizes 3,4,5,7,9,15 frame straightenings of round billet continuous casting machine
Machine participates in the throwing and straightening operation of slab, wherein 15 framves are to send dummy ingot sortie, increase roller set, does not change other component;Slab
And round billet thickness deviation is larger, carries out hydraulic cylinder changing to used withdrawal straightening machine sortie;Improved withdrawal straightening machine in view of
Decelerating motor installation site is lower and upper roller stroke increases, and causes Hooks coupling universal coupling bending offset angle inadequate, to straightening motor
Compatible production is realized in mounting height adjustment;Required depressing force is produced to slab and reprogram control (see figure using sortie
4), implementation pattern switching automatic adjustment;
The compatible conticaster fire cuts machine and improves and optimizates imitative arc cutting process, increases slab operation interface, and fire cuts machine ginseng
Number setting interface (see Fig. 5) realizes that different section, different cutting curves can operate, and single rifle and rush-harvesting and rush-planting can cut slab;
The compatible ejection roller way of continuous casting machine is substantially carried out rollgang guiding transformation, since slab, round billet base type are different,
The guiding device for needing a kind of two kinds of production models of compatibility is oriented to using the movable adjustable spacing of original navigation designing;
The compatible dummy bar of continuous casting machine uses chain dumming bar, and detection mode uses Grating examinations, and shape uses slab
Pass structure;
The compatible conticaster off-line device increases the offline centering of slab and verifying attachment newly;
The relevant control program of section and man-machine picture are increased newly after the compatible conticaster automated procedures man-machine interface transformation
Face: the main mode including slab caster is converted, the chain control of slab caster, the roll gap adjustment of withdrawal straightening machine, and HMI is drawn
Face increases section selection, as shown in fig. 6, dummy ingot, throwing, dummy bar storage automation control program and HMI picture is sent to repair automatically
Change;Increase automatically controlled two cold water spray equipment and instrument facility and the corresponding HMI picture of modification and controlling curve.
Usually empirically determine casting machine radius R and thickness H relationship are as follows: R=(40~50) H.For the slab of 200mm thickness
For section, domestic conventional plate blank conticaster arc radius is 40~50 times of thickness, thus arc radius 8m~10m it
Between, it can satisfy mass property requirement.And the conticaster radius R of northeast special steel group Dalian special steel steel mill transformation is thickness
82.425 times of H, far beyond the design concept of conventional plate blank.Slab caster arc radius is bigger, and casting machine height increases, and throws
It is higher to provide construction cost, since the static pressure of molten steel becomes larger, easily causes bulge deformation, straightening deformation problem, but casting machine radius increases
Greatly, the consistency of the larger static pressure of molten steel, slab will increase, and be conducive to the control of product quality.
Technical solution, process aspect design tundish immersed nozzle position, crystallizer size and taper value, slab fan
Shape section opening degree, adjustment slab allow pulling rate, secondary cooling parameter and mode, secondary cooling water mouth zoning arrangement parameter, change straightening
Machine pressure value.
By the round billet middle water containing opening position of middle packet tank to the mobile 180mm in bale panoramic tables direction, changes tundish and immerse
Formula mouth of a river position;
Offline to adjust crystallizer width, taper value, mouth width degree, taper depend on needed for steel grade and cooling meat under crystallizer
Width of plate slab, calculated by mouth width degree (A)=cold conditions width of plate slab × 1.013 under crystallizer;Crystallizer leptoprosopy taper takes
Certainly in width of plate slab and crystallizer operation condition, for new crystallizer, 1% width of plate slab is adjusted on crystallizer bottom edge, i.e.,
Taper is 1%;
Slab fan-shaped section and round billet section sequence correspond, and are divided into 5 fan-shaped sections, each section of inlet and outlet size Control such as table 1
Table 1
Measure roller | 200 (mm) are thick |
Fan-shaped section 1&2 (the 1st pair of roller) | 206.6±0.15 |
Fan-shaped section 1&2 (the 13rd pair of roller) | 205.5±0.15 |
1 (Continued) of table
Measure roller | 200 (mm) are thick |
Fan-shaped section 3 (the 1st pair of roller) | 205.5±0.15 |
Fan-shaped section 3 (the 10th pair of roller) | 204.8±0.15 |
Fan-shaped section 4 (the 1st pair of roller) | 204.8±0.15 |
Fan-shaped section 4 (the 10th pair of roller) | 204.3±0.15 |
Fan-shaped section 5 (the 1st pair of roller) | 204.3±0.15 |
Fan-shaped section 5 (the 10th pair of roller) | 204.0±0.15 |
Casting blank specification allows pulling rate range such as table 2.
Table 2
Secondary cooling parameter, secondary coolingwater are set according to the difference of alloying element in casting steel grade, and specific water adjusts and answers
Control is in 0.4l/kg~0.8l/kg;Press 5 sections of zonal controls in Secondary Cooling Zone of Continuous Caster water spray area, it may be assumed that the area Zu Gunkuanmian (two cold 1
Area W), Zu Gun leptoprosopy area (two cold 1st area N utilize former one area's shower water of large round billet), the top of fan-shaped section 1 and 2 (two cold 2nd areas), fan-shaped
1 and 2 lower parts of section (two cold 3rd areas), fan-shaped section 3 (two cold 4th areas), fan-shaped section 4 and fan-shaped section 5 (two cold 5th areas);Each area's water is according to pouring
The difference of steel grade and pulling rate is infused, distribution intensity is also different, and after casting steel grade determines, each area's water changes according to pulling rate, presses
Certain specific water's automatic adjustment.
Secondary cooling uses shower water or the aerosol type of cooling, keeps the slab cooling in casting process equal by Controlling model
Even, temperature recovery is small, and thermo parameters method is as shown in Figure 7;Secondary cooling water mouth zoning arrangement such as table 3.
Table 3
Subregion | Position | Methods for cooling |
1 area N | Crystallizer narrow-face foot roller | Shower water |
1 area W | The wide face foot roller of crystallizer | Shower water |
2nd area | The top fan-shaped section 1&2 | Aerosol is cooling |
3 (Continued) of table
Subregion | Position | Methods for cooling |
3rd area | The lower part fan-shaped section 1&2 | Aerosol is cooling |
4th area | Fan-shaped section 3 | Aerosol is cooling |
5th area | Fan-shaped section 4~5 | Aerosol is cooling |
Withdrawal straightening machine uses multipoint straightening, wherein the 3rd, 4,5 frame withdrawal straightening machine dummy bar clamping pressures are 350kN;7,9,15 frame
Withdrawal straightening machine dummy bar clamping pressure is 750kN;The all 150kN of service pressure.
The present invention realizes multibreak face conversion casting, is measured slab continuous casting billet density and is up to 7.924t/m3, much higher than conventional
The 7.850t/m of slab3;Macrostructure center porosity is not more than 1.5 grades, and middle crack is not more than 1.5 grades.
Detailed description of the invention
Fig. 1 is water outlet schematic cross-sectional view;
Fig. 2 is that crystallizer and shake table are self-contained;
Fig. 3 is that fan-shaped guide section shrinks roller column;
Fig. 4 is straightening machine equipment pressure control setting panel;
Fig. 5 is that fire cuts machine-cut and cuts parameter surface plate;
Fig. 6 plectane pattern switching interface button;
Fig. 7 is the thermo parameters method (pulling rate 0.8m/min) of slab;
Fig. 8 is lateral macrostructure picture;
Fig. 9 is lateral macrostructure picture;
Figure 10 is lateral macrostructure picture.
Icon explanation: tundish 1, slab mouth of a river center line 2 after transformation, former round billet mouth of a river center line 3, slab water after transformation
Mouth position 4, former round billet mouth of a river position 5, crystalliser 6, crystallizer 7 connect bolt 8, vibrate rack 9.
Specific embodiment
Embodiment 1
The slab density measure produced using big bow type continuous casting machine, continuous casting billet specification 200mm × 550mm:
The trade mark: Q345, quantity: 32.
Pouring technology: pulling rate: 0.85m/min, specific water: 0.40L/kg;
Continuous casting billet is weighed (minimum claims 20kg) using trolley, amounts to 32 continuous casting billets, it is close that slab is calculated
Degree is 7.924t/m3.The length corresponding density of slab such as table 4.
Table 4
Serial number | Length (m) | Weight (t) | Density t/m3 | Serial number | Length (m) | Weight (t) | Density t/m3 |
1 | 6.05 | 5.26 | 7.904 | 17 | 5.99 | 5.22 | 7.922 |
2 | 6.37 | 5.54 | 7.906 | 18 | 5.88 | 5.14 | 7.947 |
3 | 6.07 | 5.3 | 7.938 | 19 | 6.03 | 5.24 | 7.9 |
4 | 6.04 | 5.26 | 7.917 | 20 | 6.66 | 5.82 | 7.944 |
5 | 6.22 | 5.42 | 7.922 | 21 | 5.89 | 5.14 | 7.933 |
6 | 6.05 | 5.28 | 7.934 | 22 | 7.35 | 6.42 | 7.941 |
7 | 6.05 | 5.26 | 7.904 | 23 | 6.92 | 6.02 | 7.909 |
8 | 6.13 | 5.34 | 7.919 | 24 | 5.65 | 4.92 | 7.916 |
9 | 6.06 | 5.28 | 7.921 | 25 | 6.08 | 5.3 | 7.925 |
10 | 6.07 | 5.28 | 7.908 | 26 | 6.07 | 5.3 | 7.938 |
11 | 5.62 | 4.9 | 7.926 | 27 | 5.84 | 5.08 | 7.908 |
12 | 6.37 | 5.54 | 7.906 | 28 | 6.12 | 5.34 | 7.932 |
13 | 6.37 | 5.54 | 7.906 | 29 | 6.58 | 5.76 | 7.958 |
14 | 5.81 | 5.06 | 7.917 | 30 | 5.95 | 5.2 | 7.945 |
15 | 6.07 | 5.3 | 7.938 | 31 | 6.04 | 5.26 | 7.917 |
16 | 6.09 | 5.3 | 7.912 | 32 | 6.04 | 5.28 | 7.947 |
Embodiment 2
Continuous casting billet, continuous casting billet specification: 200mm × 550mm are produced using big circular-arc type continuous casting machine.
The trade mark: Q345-1, sample: 17112052838-101,
Pouring technology: pulling rate: 0.85m/min, specific water: 0.40L/kg;
Continuous casting billet transverse direction macrostructure rank: as shown in Figure 8: middle pine: 1.5 grades.
Embodiment 3
Continuous casting billet, continuous casting billet specification: 200mm × 850mm are produced using big circular-arc type continuous casting machine.
The trade mark: Q345-1, sample: 17112052971-101,
Pouring technology: pulling rate: 0.80m/min, specific water: 0.40L/kg;
Continuous casting billet transverse direction macrostructure rank: as shown in Figure 9: middle pine: 1.5 grades.
Embodiment 4
Continuous casting billet, continuous casting billet specification: 200mm × 840mm are produced using big circular-arc type continuous casting machine.
The trade mark: Q345+Cr+V, sample: 17112052966-208
Pouring technology: pulling rate: 0.85m/min, specific water: 0.40L/kg;
Continuous casting billet transverse direction macrostructure rank: as shown in Figure 10: middle pine: 1.0 grades, 1.0 grades of middle crack.
Claims (2)
1. a kind of compatible conticaster of big camber radius round billet slab, it is characterised in that: in existing radius be 16.5m big cross section φ
Increasing camber radius on 600/700/800 round billet continuous casting machine is 16.485m, and section is that 200mm × (550~850) mm slab connects
Function is cast, compatible conticaster is constituted;Round billet production compatible with slab is realized by converting different crystallizer passes and affiliated facility;
The compatible conticaster of the big camber radius round billet slab is by being compatible with the tundish, crystallizer, fan-shaped section, two cold rows of conticaster
Steam, withdrawal straightening machine, fire form after cutting machine, ejection roller way, dummy bar, off-line device, the transformation of automated procedures man-machine interface;
The compatible continuous casting tundish is (1) in order to guarantee that submersed nozzle is in rectangular crystallizer center, outer arc in slab
Spacing center and round billet centre deviation 180mm, therefore (5) former round billet mouth of a river position is moved forward the slab mouth of a river position to after being transformed 180mm
It sets (4), (3) former round billet mouth of a river center line moves to transformation after (2) slab mouth of a river center line, changes tundish immersed nozzle position;
The compatible conticaster plate slab crystallizer designs and manufactures based on retaining big cross section round billet continuous casting machine crystallizer, will
(6) the crystalliser of plate slab crystallizer (7) passes through connection bolt and is (8) fixed on original big cross section round billet continuous casting machine mold oscillation
Rack (9) on, guarantee the fast and convenient replacement of crystallizer;
The compatible continuous casting machine fan-shaped segment is in one section of round billet sector, a set of whole fan-shaped guide section of slab 1 and 2 of two fragment positions installation
Shrink roller column;Fan-shaped 3~5 sections similar 1~2 section fan-shaped, and design form and round billet section sequence correspond;
The compatible continuous casting machine tension leveling machine uses multipoint straightening, i.e., is drawn using 3,4,5,7,9,15 framves of big cross section round billet continuous casting machine
The machine of rectifying participates in the throwing and straightening operation of slab, wherein 15 framves are to send dummy ingot sortie, increase roller set, does not change other component;Plate
Base and round billet thickness deviation are larger, carry out hydraulic cylinder changing to used withdrawal straightening machine sortie;Improved withdrawal straightening machine mirror
And upper roller stroke lower in decelerating motor installation site increases, and causes Hooks coupling universal coupling bending offset angle inadequate, to straightening electricity
Compatible production is realized in the adjustment of machine mounting height;Required depressing force is produced to slab and carries out reprograming control using sortie, is drawn
It rectifys machine equipment pressure control setting implementation pattern and switches automatic adjustment;
The compatible conticaster fire cuts machine and improves and optimizates imitative arc cutting process, increase slab operation interface, realization different section,
Different cutting curves can operate, and single rifle and rush-harvesting and rush-planting can cut slab;
The compatible ejection roller way of continuous casting machine carries out rollgang guiding transformation, since slab, round billet base type are different, needs one kind
The guiding device of compatible two kinds of production models is oriented to using the movable adjustable spacing of original navigation designing;
The compatible dummy bar of continuous casting machine uses chain dumming bar, and detection mode uses Grating examinations,
Shape uses slab pass structure;
The compatible conticaster off-line device increases the offline centering of slab and verifying attachment newly;
The relevant control program of section and man-machine picture are increased newly after the compatible conticaster automated procedures man-machine interface transformation: main
It to include the mode conversion of slab caster, the chain control of slab caster, the roll gap adjustment of withdrawal straightening machine, the increasing of HMI picture
Add section selection, send dummy ingot, throwing, dummy bar storage automation control program and HMI picture modification automatically;Increase by two cold water sprays
Equipment is automatically controlled and instrument facility and the corresponding HMI picture of modification and controlling curve.
2. the technique of the compatible conticaster of big camber radius round billet slab according to claim 1, it is characterised in that: design is intermediate
Packet submersed nozzle position, crystallizer size and taper value, slab fan-shaped section opening degree, adjustment slab allow pulling rate, secondary
Cooling parameter and mode, secondary cooling water mouth zoning arrangement parameter change withdrawal straightening machine and pressure value;
180mm is moved to bale panoramic tables direction in the mouth of a river position of the round billet tundish;
The crystallizer size and taper value, mouth width degree A=cold conditions width of plate slab × 1.013 under crystallizer;Crystallizer leptoprosopy
Taper is 1%;
The slab fan-shaped section and round billet section sequence correspond, and are divided into 5 fan-shaped sections, each section of inlet and outlet size Control such as table 1
Table 1
The casting blank specification allows pulling rate range such as table 2;
Table 2
The secondary cooling parameter, specific water adjust control in 0.4l/kg~0.8l/kg;Press 5 in Secondary Cooling Zone of Continuous Caster water spray area
Section zonal control: the cold 1st area W of the area Zu Gunkuanmian i.e. two;The cold 1st area N in Zu Gun leptoprosopy area i.e. two utilizes former one area's shower water of large round billet;
Cold 2nd area in the top of fan-shaped section 1 and 2 i.e. two;Cold 3rd area in the lower part of fan-shaped section 1 and 2 i.e. two;Fan-shaped section 3 is two cold 4th area;Fan-shaped section 4 and fan
Shape section 5 is two cold 5th area;For each area's water according to the difference of casting steel grade and pulling rate, distribution intensity is also different, determines in casting steel grade
Later, each area's water changes according to pulling rate, automatically adjusts by certain specific water;Secondary cooling uses shower water or aerosol cooling side
Formula;
The secondary cooling water mouth zoning arrangement such as table 3;
Table 3
The withdrawal straightening machine uses multipoint straightening, wherein the 3rd, 4,5 frame withdrawal straightening machine dummy bar clamping pressures are 350kN;7,9,15 frame
Withdrawal straightening machine dummy bar clamping pressure is 750kN;The all 150kN of service pressure.
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CN109807296A (en) * | 2019-03-19 | 2019-05-28 | 宁波中超机器有限公司 | Automate continuous casting billet Casting Equipment |
CN112151129B (en) * | 2020-09-01 | 2022-07-12 | 河钢乐亭钢铁有限公司 | Technological method for accurately setting width dimension of lower opening of continuous casting slab crystallizer |
CN114472821A (en) * | 2020-11-13 | 2022-05-13 | 上海梅山钢铁股份有限公司 | Calibration method for opening degree of streamline roll gap in continuous casting of plate blank |
CN115415489B (en) * | 2022-09-05 | 2024-02-13 | 东北大学 | Continuous casting equipment and process for aluminum/aluminum alloy sheet billet |
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DE3706720C2 (en) * | 1987-03-02 | 1994-04-21 | Voest Alpine Ind Anlagen | Continuous caster with two continuous molds arranged side by side |
CN101474664B (en) * | 2009-01-19 | 2010-12-29 | 莱芜钢铁股份有限公司 | Flow control device for tundish in special-shaped billet continuous casting machine |
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Effective date of registration: 20200107 Address after: No. 18, hehebin South Road, Dengshahe Port Industrial Zone, Jinzhou District, Dalian, Liaoning 116105 Patentee after: Northeast Special Steel Group Co., Ltd Address before: 116105, No. 18, South Riverside Road, Lingang industrial area, Jinzhou District, Dalian, Liaoning, Shahe Patentee before: Dongbei Special Steel Group Dalian Special Steel Co., Ltd. |