CN206519555U - It is a kind of to improve the device of continuous casting slab quality - Google Patents
It is a kind of to improve the device of continuous casting slab quality Download PDFInfo
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- CN206519555U CN206519555U CN201621488444.5U CN201621488444U CN206519555U CN 206519555 U CN206519555 U CN 206519555U CN 201621488444 U CN201621488444 U CN 201621488444U CN 206519555 U CN206519555 U CN 206519555U
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Abstract
Improve the device of continuous casting slab quality, including multiple casting frames, electromagnetic linear periodic symmetry agitating device and the active adjustable type secondary cooling water control device set along casting stream direction the utility model discloses a kind of；Wherein, casting frame is used to manually force to form solidification end, is arranged at the horizontal zone of casting stream；Electromagnetic linear periodic symmetry agitating device is arranged at the arcuate segments of casting stream；Active adjustable type secondary cooling water control device is based on measurement casting blank surface temperature in real time and carries out stepless water spray cooling.The artificial wick-containing heavy reduction casting and rolling device and technology for forcing to form solidification end is upwardly formed big drafts in slab thickness side, so as to form the artificial solidification end for forcing to be formed in strand, terminate the condition of strand natural coagulation process defect formation, the flowing of solute element molten steel inside strand is prevented, the effect homogenized with consistency inside strand is improved.
Description
Technical field
The utility model belongs to metallurgical process control technology field, is related to a kind of dress of improvement continuous casting slab quality
Put.
Background technology
In continuous casting production process, high-temperature liquid state molten steel passes through crystallizer primary cooling zone, vertical area, buckled zone, arc
Strand of the continuous coo1ing formation such as area, aligning area, horizontal zone with certain thickness wick-containing, final solidification completely.Continuous casting billet it is solidifying
Gu process condition is the major factor for determining slab quality, the quality for how improving strand is always that field of metallurgy is adhered to for many years
The important topic of unremitting research of technique.Recently as engineering projects such as ocean platform, heavy-duty machinery, nuclear power military projects to slab
Quality requirement more and more higher, the improving strand product quality of the task is also more urgent.But, the surface transverse cracks of continuous casting billet, table
The mass defects such as face longitudinal crack, centre burst, center segregation, center porosity, which never have, to be well solved.
The surface defect of strand depends primarily on the process of setting of molten steel in a crystallizer, the initial solidification shell shape with crystallizer
The factor such as disturbance is relevant above and below into, molten steel meniscus.Development test shows：Equidistant roller row are to cause to disturb above and below molten steel meniscus
Dynamic main cause；The surface transverse cracks of continuous casting billet, surface longitudinal crack are produced in a crystallizer, in two cold-zones due to bending straightening
The reasons such as stress is excessive, irrational cooling system are extended.
The internal flaws such as centre burst, center segregation, the center porosity of strand are the keys of slab quality.Casting with wick-containing
Base is moved with certain speed in conticaster, the solidification of side heat transfer edges, forms a very long liquid core, until solidification completely.When
It when the external force for acting on green shell has exceeded critical value, will be cracked in solid liquid interface, form Line of Segregation crackle etc. internal scarce
Fall into.Further, since molten steel there occurs solidification shrinkage in process of setting, if solidification shrinkage cannot be supplemented completely, in strand
Centre can form the internal flaws such as segregation, loose, shrinkage cavity and crackle.
The content of the invention
The problem of the utility model is solved is to provide a kind of device of improvement continuous casting slab quality, by including people
Work forces the multinomial measure to be formed including solidification end, electromagnetic linear periodic symmetry agitating device, can improve the quality of strand.
The utility model is to be achieved through the following technical solutions：
It is a kind of to improve the device of continuous casting slab quality, including flow multiple casting frames 18, the electricity that direction is set along casting
Magnetic straight line periodic symmetry agitating device and active adjustable type secondary cooling water control device；
Wherein, casting frame 18 is used to manually force to form solidification end, is arranged at the horizontal zone of casting stream；
Electromagnetic linear periodic symmetry agitating device is arranged at the arcuate segments of casting stream；
Active adjustable type secondary cooling water control device is based on measurement casting blank surface temperature in real time and carries out stepless water spray cooling, and it is cast
Base surface temperature real-time measurement apparatus set location includes casting blank bending section outlet port, strand arc section outlet port, strand
Align position and the cold outlet port of strand two after front position, strand aligning.
Described casting frame 18 includes the fixed frame 24 of carrying strand 3, the float floating frame 20 pushed and connection
Device 23, wherein fixed frame 24 are provided with some groups of support deflector rolls 25, and floating frame 20 is provided with some groups of casting deflector rolls 21 and directly
Line position sensor 22.
The structure type of described support deflector roll 25 is cylindrical structure, and the structure type of casting deflector roll 21 is drum organization；It is floating
Dynamic framework 20 is moved towards strand center position, drives the extruding of drum organization casting deflector roll 21 to be carried on the strand on fixed frame 24
3, it is upwardly formed drafts in slab thickness side.
Electromagnetic linear periodic symmetry agitating device includes powered magnetic peeler deflector roll 31, PLC control system and cooling system；
The casting stream PLC and remote computer of the wherein PLC control system of electromagnetic linear periodic symmetry agitating device and conticaster pass through net
Network exchanges information and operation.
Active adjustable type secondary cooling water control device includes casting blank surface temperature real-time measurement apparatus, active accommodation formula secondary cooling water
Controller and nozzle upgrading formula stepless water spray width adjusting apparatus；
Casting blank surface temperature real-time measurement apparatus includes thermometric component 9, cooling and 11 groups of purging component 10 and control system
Into thermometric component 9 passes sequentially through cooling and purging component 10, control system 11 and is connected with PLC casting flow control systems 12；
Active accommodation formula secondary cooling water controller is made up of water model calculating section and water executable portion, wherein, water
Model calculating section includes basic parameter module 38, target surface temperature module 42 and actual measurement surface thermal module 43, meter
Calculate basic water amount module 39 and receive the parameter acquiring basic water amount information that basic parameter module 38 is provided, surface temperature difference watermeter
Calculate module 44 and receive the parameter acquiring surface temperature that target surface temperature module 42 and actual measurement surface thermal module 43 are provided
Poor water amount information, water corrected Calculation module 40, which is obtained, calculates basic water amount module 39 and the poor water computing module 44 of surface temperature
The acquisition of information cooling water inflow information of offer, and it is sent to PLC waters closed-loop control system 41；Executable portion includes constituting closed loop
PLC waters closed-loop control system 41, regulating valve 45, flowmeter 47 and the nozzle 46 of control mode；
Nozzle upgrading formula stepless water spray width adjusting apparatus includes the nozzle 46 driven by crane 50, the termination of crane 50
Provided with driving measurement apparatus 49, center section is provided with guider 48, and driving measurement apparatus 49 receives PLC control devices 52
The lifting information of transmission.
Also in conticaster linearity sector 6, buckled zone 7 and circular arc area 15 using different deflector roll diameters deflector roll different with adjacent deflector roll
The arrangement mode of spacing, upsets strand wick-containing molten steel receiving space of strand when by buckled zone 7 and circular arc area 15 and increases simultaneously
Uniformity that is big and reducing simultaneously, makes the increase and diminution of wick-containing molten steel receiving space cancel out each other, eliminates on molten steel meniscus
Lower periodic perturbation.
The installation site sensor 22 also on floating frame 20, calculates and measures the casting deflector roll 21 on floating frame 20
Depressing position, to control the decrement of drafts and strand in a thickness direction on slab thickness direction；
Casting frame 18 to being arranged on the incomplete resolidified region 29 of strand, presses relatively high on its floating frame 20
Pressure；And to being arranged on the casting frame 18 of strand complete resolidified region 30, pressed on its floating frame 20 relatively low
Pressure；The floating frame 20 of casting frame 18 can be adjusted individually, and adjusting position depends on drafts.
The casting blank surface temperature real-time measurement apparatus is separately positioned on casting blank of continuous casting machine bending section outlet port, strand circle
Position, the cold outlet port of strand two after segmental arc outlet port, strand aligning front position, strand aligning；Casting blank surface temperature is real-time
Measurement apparatus only measures strand inner arcuate surface temperature；
The water being related in described secondary cooling water controller includes calculating the basic water amount obtained, setting maximum amount of water, set
Determine least quantity, setting limit least quantity, setting limit least quantity is used to protect nozzle；When basic water amount and surface temperature
When poor water sum is more than setting maximum amount of water, performed by setting maximum amount of water；When the poor water of basic water amount and surface temperature it
During with less than setting least quantity, performed by setting least quantity.
Described roller row setting is taken along continuous casting machine casting stream direction, last from crystallizer foot roll linearity sector to two cold leveling areas
Roller, roll neck is changed from small to big step by step, adjacent deflector roll spacing is changed from small to big step by step；
When Design of Roll Range deflector roll is grouped, the roller row 58 of bending section are by part vertical area 53, buckled zone 55 and partial arc area
57 are constituted, and the outer camber line point of interface 59 of vertical area and buckled zone is intersected at deflector roll 54, the outer arc in buckled zone and circular arc area
The point of interface 61 of line is intersected at deflector roll 56；
When Design of Roll Range deflector roll is grouped, first straightening section is made up of the part in partial arc area 64, aligning area 66, and
And the outer camber line point of interface 62 of arcuate segments and aligning area is located on first aligning deflector roll 65；Last straightening section is by aligning area
66 part and part of horizontal area 68 are constituted, and it is strong positioned at last to align the outer camber line point of interface 69 in area and horizontal zone
On straight deflector roll 67.
The bending radius located where the buckled zone deflector roll that roller is arranged, by the infinitely great continuous reducing for gradually becoming arc radius
Initial bending radius R1 is infinity, follow-up radius of curvature R 1 in buckling curve, bending radius>R2>R3>R4>R5>R6>R7>R8
>R9>R10>R11, R11 and R12 are equal and are arc radius；
The aligning radius located where the aligning area deflector roll that roller is arranged, infinitely great continuous reducing is gradually become by arc radius
Curve is aligned, initial aligning radius R13 is equal with R14 and is arc radius, and the aligning radius R14 that subsequently begins<R15<R16<
R17<R18<R19<R20<R21<R22<R23<R24<R25, R25 are infinity.
Compared with prior art, the utility model has following beneficial technique effect：
The device for the improvement continuous casting slab quality that the utility model is provided, to solve the slab quality in continuous casting
Problem, is set about from the process of setting condition of continuous casting billet, by multinomial measure to improve the quality of strand：It is artificial to force to be formed
The wick-containing heavy reduction casting and rolling device of solidification end, electromagnetic linear periodic symmetry are stirred, based on real-time measurement casting blank surface temperature
The control of active adjustable type secondary cooling water, strand with nozzle upgrading formula stepless water spray width adjustment bear more small strain and wait judgement of speed change
Rate and the Design of Roll Range for eliminating periodic perturbation above and below molten steel meniscus.
The artificial wick-containing heavy reduction casting for forcing to form solidification end：Big pressure is upwardly formed in slab thickness side
Amount, so as to form the artificial solidification end for forcing to be formed in strand, terminates the condition of strand natural coagulation process defect formation,
The flowing of solute element molten steel inside strand is prevented, the effect homogenized with consistency inside strand is improved；
Electromagnetic linear periodic symmetry is stirred：Roll-type travelling-magnetic-field is produced by calutron, the wick-containing inside work(strand is pushed away
Molten steel flows from a direction to another direction, on the one hand makes wick-containing molten steel cooling inside strand more equal by convection action
It is even；On the other hand the molten steel of flowing has thrust column crystal, is allowed to recrystallize to form equiax crystal, so as to improve isometric inside strand
Brilliant ratio and consistency, reduce segregation and loose, improve Inner Quality of Billet；
Active adjustable type two based on real-time measurement casting blank surface temperature and nozzle upgrading formula stepless water spray width adjustment is cold
Water management：Realize two cold-zones cooling it is more uniform, casting blank surface temperature is evenly distributed, and casting blank bulging amount is small, bend and rectify
Straight area avoids the brittle zone of cast steel grade, so that strand avoids generation face crack and centre burst, improves strand
Quality.
Strand bears more small strain and equi-strain rate and eliminates the Design of Roll Range of periodic perturbation above and below molten steel meniscus：Disappear
Except periodic perturbation above and below molten steel meniscus caused by the change because of wick-containing molten steel receiving space, casting billet surface oscillation mark is reduced
Depth, strand is strained in bending and aligning and equi-strain rate is smaller, it is to avoid surface transverse cracks and surface occurs in casting billet surface
The quality problems such as longitudinal crack.
Brief description of the drawings
Fig. 1 is that conticaster device and roller list intention；
Fig. 2 is casting frame structural representation；
The wick-containing schematic diagram of solidification end when Fig. 3 is strand natural coagulation；
Fig. 4 forms the wick-containing schematic diagram of solidification end for artificial pressure；
Fig. 5 is casting blank solidification status of processes schematic diagram；
Fig. 6 is electromagnetic linear periodic symmetry agitating device scheme of installation；
Fig. 7 is electromagnetic linear periodic symmetry agitating device operating diagram；
Fig. 8 is the wick-containing MOLTEN STEEL FLOW schematic diagram under electromagnetic linear periodic symmetry agitating device is acted on；
Fig. 9 is active adjustment type Computer simulation for controlling secondary cooling schematic diagram；
Figure 10 is nozzle upgrading formula stepless water spray width adjusting apparatus structural representation；
Figure 11 is bending section roller array structure schematic diagram；
Figure 12 is straightening section roller array structure schematic diagram.
Wherein, 1 is molten steel meniscus；2 be crystallizer；3 be strand；4 be deflector roll；5 be deflector roll spacing；6 be vertical area；7
For buckled zone；8 be bending section；9 be thermometric component；10 be cooling and purging component；11 be control system；12 be PLC casting stream controls
System processed；13 be casting blank surface temperature real-time measurement apparatus installation site；14 be segmental arc；15 be arcuate segments；16 be straightening section；
17 be aligning area；18 be casting frame；19 be horizontal zone；20 be floating frame；21 be casting deflector roll；22 be that linear position is sensed
Device；23 be attachment means；24 be fixed frame；25 be support deflector roll；26 be solute element molten steel；27 be that strand coagulates naturally
Gu the solidification end of process formation；28 be the artificial solidification end for forcing to be formed；29 be the incomplete resolidified region of strand；30 be casting
Base complete resolidified region；31 be the deflector roll of powered magnetic peeler；32 be wick-containing molten steel；33 be electromagnetism excitation device；34 be steel
Water flow direction；35 be column crystal；36 be equiax crystal；37 be eddy flow；38 be basic parameter；39 calculate basic water amount；40 be water
Measure corrected Calculation；41 be water closed-loop control system；42 target surface temperatures；43 be measurement surface temperature；44 be surface temperature
Poor water is calculated；45 be regulating valve；46 be nozzle；47 be flowmeter；48 be guider；49 be driving measurement apparatus；50 are
Crane；51 be water spray width；P52 is LC control devices；53 be part vertical area；54 be deflector roll；55 be buckled zone；56 be to lead
Roller；57 be partial arc area；58 arrange for the roller of bending section；59 be the outer camber line point of interface of vertical area and buckled zone；60 be bending
Radius；61 be point of interface；62 be point of interface；63 be bending radius；64 be partial arc area；65 be aligning deflector roll；66 be aligning
Area；67 be aligning deflector roll；68 be part of horizontal area；69 be point of interface.
Embodiment
The utility model is described in further detail with reference to specific embodiment, described is to the utility model
Explanation rather than restriction.
The device for the improvement continuous casting slab quality that the utility model is provided, is changed by multinomial measure in continuous casting
The quality of kind strand, including flow the wick-containing heavy reduction casting and rolling machine that direction sets multiple artificial pressures to form solidification end along casting
Frame, electromagnetic linear periodic symmetry agitating device, formula stepless water spray width of being upgraded based on real-time measurement casting blank surface temperature and nozzle
The active adjustable type secondary cooling water control device of adjustment.
Referring to Fig. 1~Figure 12, a kind of device of improvement continuous casting slab quality, including the multiple of direction setting are flowed along casting
Casting frame 18, electromagnetic linear periodic symmetry agitating device and active adjustable type secondary cooling water control device；
Wherein, casting frame 18 is used to manually force to form solidification end, is arranged at the horizontal zone of casting stream；
Electromagnetic linear periodic symmetry agitating device is arranged at the arcuate segments of casting stream；
Active adjustable type secondary cooling water control device is based on measurement casting blank surface temperature in real time and carries out stepless water spray cooling, and it is cast
Base surface temperature real-time measurement apparatus set location includes casting blank bending section outlet port, strand arc section outlet port, strand
Align position and the cold outlet port of strand two after front position, strand aligning.
Each measure is further illustrated below.
Described casting frame 18 is used to form solidification end to strand wick-containing implementation heavy reduction with artificial pressure, including
The fixed frame 24 of strand 3, the float floating frame 20 pushed and attachment means 23 are carried, wherein fixed frame 24 is provided with some
Group support deflector roll 25, floating frame 20 is provided with some groups of casting deflector rolls 21 and linear position sensors 22.
The structure type of described support deflector roll 25 is cylindrical structure, and the structure type of casting deflector roll 21 is drum organization；It is floating
Dynamic framework 20 is moved towards strand center position, drives the extruding of drum organization casting deflector roll 21 to be carried on the strand on fixed frame 24
3, it is upwardly formed drafts in slab thickness side.
Specifically, fixed frame 24 is provided with some groups of support deflector rolls 25, support guide roller structure form is cylindrical structure, is floated
Dynamic framework 20 installs some groups of casting deflector rolls 21 and linear position sensors 22, and the structure type of casting deflector roll 21 is drum organization.
Electromagnetic linear periodic symmetry agitating device includes powered magnetic peeler deflector roll 31, PLC control system and cooling system；
The casting stream PLC and remote computer of the wherein PLC control system of electromagnetic linear periodic symmetry agitating device and conticaster pass through net
Network exchange pertinent information and operation.
Electromagnetic linear periodic symmetry agitating device control system system power factor >=0.9；Electromagnetic linear periodic symmetry is stirred
Dynamic apparatus control system realizes the agitation accurate closed-loop control of electric current, and current stability, is high, and error is less than 3%, and irregularity of wave form is small
In 3%, frequency error is less than 0.1Hz, and current rise time is less than 0.5 second, and overshoot is less than ± 5%；Electromagnetic linear periodic symmetry
Agitating device control system ensures to operate operation order normative and reasonable, safe operation, even if power failure suddenly, will not also cause first device
Part is damaged, and is preserved data and do not lost；
Electromagnetic linear periodic symmetry agitating device control system has different fault diagnosis and warning function, such as mistake/deficient electricity
Alarm and the disorderly closedown such as pressure, overcurrent, overheat, short circuit, three-phase imbalance, water-carrying capacity is small, leakage current is excessive, ground connection, water temperature
Function.
Active adjustable type secondary cooling water control device includes casting blank surface temperature real-time measurement apparatus, active accommodation formula secondary cooling water
Controller and nozzle upgrading formula stepless water spray width adjusting apparatus；
Casting blank surface temperature real-time measurement apparatus includes thermometric component 9, cooling and 11 groups of purging component 10 and control system
Into thermometric component 9 passes sequentially through cooling and purging component 10, control system 11 and is connected with PLC casting flow control systems 12；Specifically
, thermometric component is made up of double color infrared temperature measuring instrument；Cooling and purging component are by heat-resistant fireproof metal hose, connector, sky
Conductance flow tube and aiming tube composition；Control member is by display instrument, control display lamp, air intake control valve, oil and water filters, flow
Meter, pressure transmitter, magnetic valve, heater, control relay, air switch etc. are constituted；
Active accommodation formula secondary cooling water controller is made up of water model calculating section and water executable portion, wherein, water
Model calculating section includes basic parameter module 38, target surface temperature module 42 and actual measurement surface thermal module 43, meter
Calculate basic water amount module 39 and receive the parameter acquiring basic water amount information that basic parameter module 38 is provided, surface temperature difference watermeter
Calculate module 44 and receive the parameter acquiring surface temperature that target surface temperature module 42 and actual measurement surface thermal module 43 are provided
Poor water amount information, water corrected Calculation module 40, which is obtained, calculates basic water amount module 39 and the poor water computing module 44 of surface temperature
The acquisition of information cooling water inflow information of offer, and it is sent to PLC waters closed-loop control system 41；Executable portion includes constituting closed loop
PLC waters closed-loop control system 41, regulating valve 45, flowmeter 47 and the nozzle 46 of control mode；
Nozzle upgrading formula stepless water spray width adjusting apparatus includes the nozzle 46 driven by crane 50, the termination of crane 50
Provided with driving measurement apparatus 49, center section is provided with guider 48, and driving measurement apparatus 49 receives PLC control devices 52
The lifting information of transmission.
A kind of method of improvement continuous casting slab quality, including following operation is given below：
1) it is artificial to force to form solidification end：If being quarreled in continuous casting machine casting stream guiding area arrangement and possessing long-range squeeze function
Casting frame 18, the fragment position before strand solidifies completely, by the floating frame 20 of casting frame 18 towards strand center
Direction is moved, and drives the extruding of drum organization casting deflector roll 21 to be carried on the strand 3 on fixed frame 24, on slab thickness direction
Big drafts is formed, so that artificial in strand force to form solidification end 28, strand natural coagulation process defect shape is terminated
Into condition, prevent the flowing of solute element molten steel 26 inside strand；Improve homogenizing inside strand and consistency
Effect；
The solidification end 28 that artificial pressure is formed not is the solidification end 27 of strand natural coagulation process formation, but
A fragment position before strand solidification completely, by being upwardly formed big drafts in slab thickness side by force, forms artificial force
Form solidification end；
2) electromagnetic linear periodic symmetry is stirred：The alternating magnetic field excited by laying electromagnetism excitation device 33 penetrates into strand 3
Wick-containing in produce induced-current, the induced-current and local magnetic field interaction produce electromagnetism and push wick-containing inside work(strand
Molten steel 32 flows and (flows 34 to another way from a direction), makes the formation eddy flow 37 of wick-containing molten steel 32, and eddy flow is on the one hand logical
Crossing convection action makes wick-containing molten steel cooling inside strand more uniform；On the other hand the molten steel of flowing has thrust nascent inside green shell
Column crystal 35, is allowed to recrystallize to form equiax crystal, so as to improve proportion of equiaxed grain and consistency inside strand, reduce segregation and
It is loose, improve Inner Quality of Billet；
Further, the field form that electromagnetism excitation device 33 is excited is roll-type travelling-magnetic-field, and methods for cooling is lenticular wire winding
It is outer cold；Different agitation electric currents are taken according to different steel grades, section, tundish is changed in dummy ingot process of billet withdrawal, heat, changes the mouth of a river and drawing
During tail base, electromagnetic linear periodic symmetry agitation technology is prohibitted the use of, to prevent bleed-out accident；
The PLC of the control system of electromagnetic linear periodic symmetry device and the casting stream PLC and remote computer of conticaster pass through
Network exchange relevant information and operation, and with different fault diagnosis and warning function, such as mistake/under-voltage, overcurrent, mistake
Alarm and the disorderly closedown function such as heat, short circuit, three-phase imbalance, water-carrying capacity is small, leakage current is excessive, ground connection, water temperature；
3) the active adjustable type secondary cooling water control measured in real time based on casting blank surface temperature：Casting blank surface temperature is measured in real time
The surface temperature of the periodically residing strand of device is transferred to PLC casting flow control systems 12, and it is real-time to cast flow control system 12 by PLC
It is transferred to active accommodation formula secondary cooling water controller；Secondary cooling water controller calculates basic water amount, Ran Houtong in real time according to basic parameter
Cross contrast sets target surface temperature and actual measurement surface temperature and eliminate the poor water of surface temperature to calculate, repaiied through water amount
Final water is just being formed afterwards and result of calculation is sent to the PLC water closed-loop control systems for performing water spray；PLC water closed loop controls
Water spray width in system processed is controlled by nozzle formula stepless water spray width adjusting apparatus of upgrading, its according to the section of cast steel grade,
The dynamic state of parameters such as pulling rate, cooling strategy calculate water spray width, drive crane lifting to adjust by drive device measurement apparatus
Whole water spray width；
4) the roller row of periodic perturbation are set up and down：Led in conticaster linearity sector 6, buckled zone 7 and circular arc area 15 using difference
The arrangement mode of roller diameter deflector roll spacing different with adjacent deflector roll, upsets strand strand when by buckled zone 7 and circular arc area 15
Wick-containing molten steel receiving space simultaneously increase and simultaneously reduce uniformity, make wick-containing molten steel receiving space increase and reduce phase
Mutually offset, eliminate periodic perturbation above and below molten steel meniscus.The arrangement mode, has upset strand by buckled zone 7 and circular arc area
Strand is squeezed wick-containing molten steel receiving space caused by effect while the uniformity for increasing and reducing, makes wick-containing simultaneously when 15
The increase and diminution of molten steel receiving space are cancelled out each other, and maintain wick-containing molten steel receiving space to be basically unchanged, so as to eliminate because of liquid
Periodic perturbation above and below molten steel meniscus, reduces casting billet surface depth of chatter mark, keeps away caused by the change of core molten steel receiving space
Exempt from casting billet surface and the quality problems such as surface transverse cracks and surface longitudinal crack occur.
Further, the installation site sensor 22 also on floating frame 20, calculates and measures the casting on floating frame 20
The depressing position of deflector roll 21 is rolled, to control the decrement of drafts and strand in a thickness direction on slab thickness direction；
Casting frame 18 to being arranged on the incomplete resolidified region 29 of strand, presses relatively high on its floating frame 20
Pressure；And to being arranged on the casting frame 18 of strand complete resolidified region 30, pressed on its floating frame 20 relatively low
Pressure；The floating frame 20 of casting frame 18 can be adjusted individually, and adjusting position depends on drafts.The floating of casting frame 18
Casting deflector roll 21 on framework 20 extrudes strand using drum organization, more conforms to the solidification law and Laws of Mechanics of green shell,
Improve the extruding efficiency of strand wick-containing.
Casting blank surface temperature real-time measurement apparatus is separately mounted to casting blank of continuous casting machine bending section outlet port 13a, strand circle
Position 13d, the cold outlet port 13e of strand two etc. after 2 sections of outlet port 13b of segmental arc, strand aligning front position 13c, strand aligning；
Casting blank surface temperature real-time measurement apparatus only measures strand inner arcuate surface temperature；
The surface temperature of strand residing for installation site is periodically transferred to PLC castings by casting blank surface temperature real-time measurement apparatus
Flow control system 12, active accommodation formula Computer simulation for controlling secondary cooling is given by the PLC castings real-time Transmission of flow control system 12；
The water being related in described secondary cooling water controller includes calculating the basic water amount obtained, setting maximum amount of water, set
Determine least quantity, setting limit least quantity, setting limit least quantity is used to protect nozzle；Setting limit least quantity is used for
Protect nozzle；
When basic water amount and the poor water sum of surface temperature are more than setting maximum amount of water, performed by setting maximum amount of water；
When basic water amount and the poor water sum of surface temperature are less than setting least quantity, performed by setting least quantity.Nozzle is upgraded
It is wide that formula stepless water spray width adjusting apparatus calculates water spray according to dynamic state of parameters such as section, pulling rate, the cooling strategies of cast steel grade
Degree, drives the lifting of crane 50 to adjust water spray width 51 by drive device measurement 49.
Described roller row setting is taken along continuous casting machine casting stream direction, last from crystallizer foot roll linearity sector to two cold leveling areas
Roller, roll neck is changed from small to big step by step, adjacent deflector roll spacing is changed from small to big step by step；
When Design of Roll Range deflector roll is grouped, the roller row 58 of bending section are by part vertical area 53, buckled zone 55 and partial arc area
57 are constituted, and the outer camber line point of interface 59 of vertical area and buckled zone is intersected at deflector roll 54, the outer arc in buckled zone and circular arc area
The point of interface 61 of line is intersected at deflector roll 56；
When Design of Roll Range deflector roll is grouped, first straightening section is made up of the part in partial arc area 64, aligning area 66, and
And the outer camber line point of interface 62 of arcuate segments and aligning area is located on first aligning deflector roll 65；Last straightening section is by aligning area
66 part and part of horizontal area 68 are constituted, and it is strong positioned at last to align the outer camber line point of interface 69 in area and horizontal zone
On straight deflector roll 67.
The bending radius 60 located where the buckled zone deflector roll that roller is arranged, by the infinitely great continuous change for gradually becoming arc radius
Initial bending radius R1 is infinity, follow-up radius of curvature R 1 in footpath buckling curve, bending radius 60>R2>R3>R4>R5>R6>
R7>R8>R9>R10>R11, R11 and R12 are equal and are arc radius；
The aligning radius 63 located where the aligning area deflector roll that roller is arranged, infinitely great continuous change is gradually become by arc radius
Curve is aligned in footpath, and initial aligning radius R13 is equal with R14 and is arc radius, and the aligning radius R14 that subsequently begins<R15<R16
<R17<R18<R19<R20<R21<R22<R23<R24<R25, R25 are infinity.
Specific embodiment is provided below in conjunction with the accompanying drawings.
Referring to Fig. 1, casting and rolling machine (18a, 18b, 18c) is set up in continuous casting machine casting stream side, with leading for powered magnetic peeler
Roller 31 replace deflector roll 4d, casting blank surface temperature real-time measurement apparatus be separately positioned on casting blank of continuous casting machine bending section outlet port 13a,
Position 13d, the cold outlet port of strand two after 2 sections of outlet port 13b of strand arc section, strand aligning front position 13c, strand aligning
13e；
Referring to Fig. 2, Fig. 3, in process of production, when the strand with wick-containing is located at casting frame present position, casting
The floating frame 20 of frame 18 is moved towards strand center position, drives drum organization casting deflector roll 21 to extrude strand 3, thick in strand
Degree side is upwardly formed big drafts, so as to form the artificial solidification end 28 for forcing to be formed in strand, terminates strand natural
The condition of process of setting defect formation, prevents 26 flowings of solute element molten steel inside strand, improves inside strand
The effect homogenized with consistency.Wherein, calculate and measure by position sensor 22 depressing position of casting deflector roll 21 come
Control the decrement of drafts and strand in a thickness direction on slab thickness direction；
Big drafts is upwardly formed in slab thickness side by casting frame, artificial pressure as shown in Figure 4 is formd
The wick-containing of solidification end is formed, the condition of strand natural coagulation process defect formation is so terminated, prevented rich inside strand
Collect 26 flowings of solute element molten steel, improve the effect homogenized with consistency inside strand.
Referring to Fig. 7 and Fig. 8, the alternating magnetic field excited by electromagnetism excitation device 33, which is penetrated into, produces sensing in the wick-containing of strand
Electric current, the induced-current and local magnetic field interaction produce electromagnetism and push wick-containing molten steel 32 inside work(strand from a direction
34 are flowed to another way, make the formation eddy flow 37 of wick-containing molten steel 32, wick-containing steel inside strand is on the one hand made by convection action
Water cooling is more uniform；On the other hand the molten steel of flowing has thrust nascent column crystal 35 inside green shell, is allowed to recrystallize to be formed
Equiax crystal, so as to improve proportion of equiaxed grain and consistency inside strand, reduces segregation and loose, improves Inner Quality of Billet；
Referring to Fig. 9, water model according to basic parameter such as steel grade composition, casting blank section, poring rate, pouring temperature etc.,
Basic water amount is calculated in real time, while calculating elimination surface by contrasting sets target surface temperature and actual measurement surface temperature
The water of temperature difference, forms final water through water amount corrected Calculation and result of calculation is sent to PLC water closed-loop controls system
System；
Referring to accompanying drawing 1, actual measurement surface temperature is by being arranged on casting blank of continuous casting machine bending section outlet port 13a, strand
Position 13d, the cold outlet port 13e of strand two after 2 sections of outlet port 13b of arc section, strand aligning front position 13c, strand aligning
Casting blank surface temperature measurement apparatus obtain；
Referring to accompanying drawing 1, Design of Roll Range is taken straight using different deflector rolls in conticaster linearity sector 6, buckled zone 7 and circular arc area 15
The arrangement mode of the deflector roll spacing 5 different with adjacent deflector roll of footpath 4, has upset strand strand when by buckled zone 7 and circular arc area 15
Wick-containing molten steel receiving space caused by effect is squeezed while the uniformity for increasing and reducing, accommodates wick-containing molten steel simultaneously
The increase and diminution in space are cancelled out each other, and maintain wick-containing molten steel receiving space to be basically unchanged, so as to eliminate because wick-containing molten steel holds
Receive caused by the change in space periodic perturbation above and below molten steel meniscus, reduce casting billet surface depth of chatter mark, it is to avoid strand table
There are the quality problems such as surface transverse cracks and surface longitudinal crack in face.
Referring to Fig. 1, Design of Roll Range is taken along continuous casting machine casting stream direction, last from crystallizer foot roll linearity sector to two cold leveling areas
Roller roll neck is changed from small to big step by step.
Referring to Fig. 1, Design of Roll Range is taken along continuous casting machine casting stream direction, and from crystallizer foot roll to two cold leveling areas, last roller is adjacent
Deflector roll spacing is changed from small to big step by step.
Referring to Figure 11, the bending radius 60 located where the buckled zone deflector roll that roller is arranged gradually becomes arc radius by infinity
Continuous variable diameter bending curve, that is to say, that R1 is infinity, and R1 in bending radius 60>R2>R3>R4>R5>R6>R7>R8
>R9>R10>R11, R11 and R12 are equal and are arc radius.
Referring to Figure 12, the aligning radius 63 located where the aligning area deflector roll that roller is arranged gradually becomes infinitely great by arc radius
Continuous reducing aligning curve, that is to say, that R13 is equal with R14 and is arc radius, and R14<R15<R16<R17<R18<
R19<R20<R21<R22<R23<R24<R25, R25 are infinity.
Referring to Figure 11, when Design of Roll Range deflector roll is grouped, the roller row 58 of bending section are by part vertical area 53, buckled zone 55 and portion
Cyclotomy arc area 57 is constituted, and the outer camber line point of interface 59 of vertical area and buckled zone is just intersected at deflector roll 54, buckled zone and
The point of interface 61 of the outer camber line in circular arc area is just intersected at deflector roll 56；
Referring to Figure 12, when Design of Roll Range deflector roll is grouped, first straightening section 16a is by partial arc area 64, aligning area 66
A part is constituted, and the outer camber line point of interface 62 of arcuate segments and aligning area is placed exactly on first aligning deflector roll 65；Finally
One straightening section 16b is made up of the part and part of horizontal area 68 for aligning area 66, and aligns the outer camber line of area and horizontal zone
Point of interface 69 is placed exactly on last aligning deflector roll 67.
Example given above is to realize the utility model preferably example, and the utility model is not limited to above-mentioned implementation
Example.Those skilled in the art according to the technical characteristic of technical solutions of the utility model made it is any it is nonessential addition,
Replace, belong to protection domain of the present utility model.
Claims (9)
1. a kind of improve the device of continuous casting slab quality, it is characterised in that including the multiple castings set along casting stream direction
Frame (18), electromagnetic linear periodic symmetry agitating device and active adjustable type secondary cooling water control device；
Wherein, casting frame (18) is used to manually force to form solidification end, is arranged at the horizontal zone of casting stream；
Electromagnetic linear periodic symmetry agitating device, is penetrated into by alternating magnetic field and induced-current is produced in the wick-containing of strand, is set
In the arcuate segments of casting stream；
Active adjustable type secondary cooling water control device is based on measurement casting blank surface temperature in real time and carries out stepless water spray cooling, its strand table
Face real-time measurement device of temperatures set location includes casting blank bending section outlet port, strand arc section outlet port, strand aligning
Position and the cold outlet port of strand two after front position, strand aligning.
2. improve the device of continuous casting slab quality as claimed in claim 1, it is characterised in that described casting frame
(18) fixed frame (24) of carrying strand (3), the float floating frame (20) pushed and attachment means (23) are included, wherein solid
Framework (24) is determined provided with some groups of support deflector rolls (25), and floating frame (20) is provided with some groups of casting deflector rolls (21) and linear position
Sensor (22).
3. improve the device of continuous casting slab quality as claimed in claim 2, it is characterised in that described support deflector roll
(25) structure type is cylindrical structure, and casting deflector roll (21) structure type is drum organization；Floating frame (20) is towards in strand
Heart direction is moved, and drives drum organization casting deflector roll (21) extruding to be carried on the strand (3) on fixed frame (24), thick in strand
Degree side is upwardly formed drafts.
4. improve the device of continuous casting slab quality as claimed in claim 1, it is characterised in that electromagnetic linear periodic symmetry
Agitating device includes deflector roll (31), PLC control system and the cooling system of powered magnetic peeler；Wherein electromagnetic linear periodic symmetry
The PLC control system of agitating device and the casting stream PLC of conticaster and remote computer pass through network exchange information and operation.
5. improve the device of continuous casting slab quality as claimed in claim 1, it is characterised in that active adjustable type secondary cooling water
Control device includes casting blank surface temperature real-time measurement apparatus, active accommodation formula secondary cooling water controller and the nozzle upgrading stepless spray of formula
Water width adjusting apparatus；
Casting blank surface temperature real-time measurement apparatus includes thermometric component (9), cooling and purging component (10) and control system (11)
Composition, thermometric component (9) passes sequentially through cooling and purging component (10), control system (11) and PLC casting flow control systems (12)
It is connected；
Active accommodation formula secondary cooling water controller is made up of water model calculating section and water executable portion, wherein, water model
Calculating section includes basic parameter module (38), target surface temperature module (42) and actual measurement surface thermal module (43),
Calculate basic water amount module (39) and receive the parameter acquiring basic water amount information that basic parameter module (38) is provided, surface temperature is poor
Water computing module (44) receives the parameter that target surface temperature module (42) and actual measurement surface thermal module (43) are provided
The poor water amount information of surface temperature is obtained, water corrected Calculation module (40), which is obtained, calculates basic water amount module (39) and surface temperature
The acquisition of information cooling water inflow information that poor water computing module (44) provides, and it is sent to PLC waters closed-loop control system (41)；
Executable portion include constituting the PLC waters closed-loop control system (41) of close-loop control mode, regulating valve (45), flowmeter (47) and
Nozzle (46)；
Nozzle upgrading formula stepless water spray width adjusting apparatus includes the nozzle (46) driven by crane (50), crane (50) end
Head is provided with driving measurement apparatus (49), and center section is provided with guider (48), and driving measurement apparatus (49) receives PLC controls
The lifting information that device (52) processed sends.
6. improve the device of continuous casting slab quality as claimed in claim 1, it is characterised in that also in conticaster linearity sector
(6), buckled zone (7) and circular arc area (15) are beaten using the arrangement mode of different deflector roll diameters deflector roll spacing different with adjacent deflector roll
What the wick-containing molten steel receiving space of random strand strand when by buckled zone (7) and circular arc area (15) increased and reduced simultaneously simultaneously
Uniformity, makes the increase and diminution of wick-containing molten steel receiving space cancel out each other, and eliminates periodic perturbation above and below molten steel meniscus.
7. improve the device of continuous casting slab quality as claimed in claim 1, it is characterised in that also in floating frame (20)
Upper installation site sensor (22), calculates and measures the depressing position of the casting deflector roll (21) on floating frame (20), to control
The decrement of drafts and strand in a thickness direction on slab thickness direction；
Casting frame (18) to being arranged on the incomplete resolidified region (29) of strand, presses relative on its floating frame (20)
High pressure；And to being arranged on the casting frame (18) of strand complete resolidified region (30), on its floating frame (20)
The relatively low pressure of pressure；The floating frame (20) of casting frame (18) can be adjusted individually, and adjusting position depends on drafts.
8. improve the device of continuous casting slab quality as claimed in claim 6, it is characterised in that described roller row setting is adopted
Take along continuous casting machine casting stream direction, the last roller from crystallizer foot roll linearity sector to two cold leveling areas, roll neck changes from small to big step by step, adjacent lead
Roller spacing is changed from small to big step by step；
When Design of Roll Range deflector roll is grouped, the roller row (58) of bending section are by part vertical area (53), buckled zone (55) and partial arc
Area (57) is constituted, and the outer camber line point of interface (59) of vertical area and buckled zone intersects at deflector roll (54) place, buckled zone and circular arc
The point of interface (61) of the outer camber line in area intersects at deflector roll (56) place；
When Design of Roll Range deflector roll is grouped, first straightening section is made up of a part for partial arc area (64), aligning area (66), and
And the outer camber line point of interface (62) of arcuate segments and aligning area is located on first aligning deflector roll (65)；Last straightening section is by rectifying
The part in straight area (66) and part of horizontal area (68) composition, and align the outer camber line point of interface (69) in area and horizontal zone and be located at
On last aligning deflector roll (67).
9. improve the device of continuous casting slab quality as claimed in claim 6, it is characterised in that the buckled zone arranged in roller is led
Bending radius at where roller, it is initial in the infinitely great continuous variable diameter bending curve for gradually becoming arc radius, bending radius
Radius of curvature R 1 is infinity, follow-up radius of curvature R 1>R2>R3>R4>R5>R6>R7>R8>R9>R10>R11, R11 and R12 phase
Deng and for arc radius；
The aligning radius located where the aligning area deflector roll that roller is arranged, gradually becomes infinitely great continuous reducing by arc radius and aligns
Curve, initial aligning radius R13 is equal with R14 and is arc radius, and the aligning radius R14 that subsequently begins<R15<R16<R17<
R18<R19<R20<R21<R22<R23<R24<R25, R25 are infinity.
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| CN201621488444.5U CN206519555U (en) | 2016-12-30 | 2016-12-30 | It is a kind of to improve the device of continuous casting slab quality |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106513617A (en) * | 2016-12-30 | 2017-03-22 | 中国重型机械研究院股份公司 | Device and method for improving casting blank quality of continuous casting production |
| CN109465415A (en) * | 2018-12-07 | 2019-03-15 | 东北大学 | Fan-shaped section roll array structure under a kind of double single-point weight in continuous casting and solidifying end |
| CN112962070A (en) * | 2021-02-02 | 2021-06-15 | 邱从章 | Preparation equipment and preparation method of sputtering target material |
-
2016
- 2016-12-30 CN CN201621488444.5U patent/CN206519555U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106513617A (en) * | 2016-12-30 | 2017-03-22 | 中国重型机械研究院股份公司 | Device and method for improving casting blank quality of continuous casting production |
| CN106513617B (en) * | 2016-12-30 | 2019-02-12 | 中国重型机械研究院股份公司 | A kind of device and method improving continuous casting slab quality |
| CN109465415A (en) * | 2018-12-07 | 2019-03-15 | 东北大学 | Fan-shaped section roll array structure under a kind of double single-point weight in continuous casting and solidifying end |
| CN112962070A (en) * | 2021-02-02 | 2021-06-15 | 邱从章 | Preparation equipment and preparation method of sputtering target material |
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