CN105057626B - Control system and method for grain refinement of corners of continuous casting billets - Google Patents
Control system and method for grain refinement of corners of continuous casting billets Download PDFInfo
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- CN105057626B CN105057626B CN201510534316.3A CN201510534316A CN105057626B CN 105057626 B CN105057626 B CN 105057626B CN 201510534316 A CN201510534316 A CN 201510534316A CN 105057626 B CN105057626 B CN 105057626B
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Abstract
The invention provides a control system and method for grain refinement of the corners of continuous casting billets, and belongs to the field of steel making and continuous casting. According to the control system and method, a cooling water spraying mechanism and a non-contact type infrared online temperature measuring device are introduced on the two sides of strand of a vertical area of a vertical bent section of a continuous casting machine, and the online temperature measuring device uploads the temperature of the corners of the casting billet located on the bent point of the vertical bent section and the temperature of the corners of the casting billets located at an outlet of the vertical bent section to an upper computer in real time; according to the temperature requirement of the corners of the casting billets and the requirements of precipitation and dispersed cooling and double-phase-change crystal grain refining of micro alloy carbon carbonitride of corner structures of the micro alloy steel continuous casting billets, the water quantity of a foot roller wide/narrow surface of the continuous casting machine, the water quantity of the spraying mechanism and the water quantity of all areas in the vertical bent section are dynamically controlled; cooling of the corners of the casting billets with different section widths in the vertical bent section is intelligently and accurately controlled in the continuous casting production process, so that the temperature evolution control requirements of dispersed precipitation and crystal grain refining of micro alloy carbonitride, in the vertical bent section, of the corner structures of the micro alloy steel casting billets of different types are met.
Description
Technical field
The invention belongs to steel smelting-continuous casting field, and in particular to a kind of control system of continuous casting billet corner crystal grain refinement and side
Method.
Background technology
Adding microalloy element toward steel can make it produce good crystal grain refinement and precipitation strength effect in hot procedure
Really, the mechanical property such as the toughness of General Promotion steel and intensity；However, in actual micro-alloyed steel continuous casting production process, its strand
Solidification cracking sensitivity is higher, and strand corner takes place frequently micro- transverse crack defect, it has also become the high-quality and efficient metaplasia of restriction micro alloyed steel
Produce a common technology difficult problem urgently to be resolved hurrily；
It is such steel casting blank solidification process that micro-alloyed steel continuous casting base produces the essential reason of transverse corner crack, microalloy unit in steel
Element is easily and the element such as C, N combines to form carbide, nitride or carbonitride, and analyses in a large number in chain form in austenite grain boundary
Go out, and thus aggravate austenite grain boundary pro-eutectoid ferrite film to be formed, cause strand corner tissue grain-boundary strength to be greatly reduced.Casting
Base is easily concentrated in strand corner tissue crystal boundary stress and causes transverse crack under bending and straightening force effect；Therefore, control
Microalloy continuous casting billet corner process of setting microstructure evolution, the overall strand corner tissue plasticity that lifted are to be inherently eliminated microalloy
The key that steel continuous casting billet transverse corner crack occurs；And realize that the effective means of the purpose is then refinement strand corner tissue crystallite dimension
And dispersion its is transgranular with crystal boundary microalloy Carbonitride Precipitation；
For casting blank crystal grains refinement is controlled, implementing the double transformation behaviors of strand corner tissue process of setting (that is, makes continuous casting billet structure
In high-temperature region, process of setting is quickly transformed into ferrite by austenite, then by ferrite fast temperature rising to austenite) it is then a kind of
Effective continuous casting billet structure fine grain control device；And according to strand corner temperature evolution feature, possessing development strand corner tissue should
Two-phase becomes the position of control technique and concentrates in conticaster foot roller and vertical curved segment；
And for dispersion casting blank solidification tissue Carbonitride Precipitation effective ways are right using the cooling of larger rate of cooling
Answer the high temperature structure of steel in Carbonitride Precipitation humidity province so that the unit such as microalloy and C, N procatarxis cannot be quick in continuous casting billet structure
Diffusion and dispersion continuous casting billet structure is transgranular separates out with crystal boundary；It is higher for current yield both at home and abroad containing Nb and micro alloyed steel containing B
For production, the Precipitation Temperature area of its casting blank solidification process carbonitride is about 800～1125 DEG C, the correspondence strand corner temperature
Position on continuous casting machine casting stream is crystallizer middle and lower part, sufficient roller and vertical curved segment, and focuses primarily upon sufficient roller with vertical curved segment area
Domain；Therefore, if can realize, crystal grain refinement is organized in strand corner, its strand corner tissue provided in quick ferritizing process
The precipitates such as the Nb (C, N) that can ensure that in steel and BN are being organized transgranular and crystal boundary disperse educt by rate of cooling more；
For this purpose, early stage need to be implemented to strand corner with vertical curved segment early stage in casting machine foot roller quickly cooling down, strand is rapidly completed
Corner is organized from austenite to ferritic transformation, and realizes that microalloy carbonitride is analysed in transgranular with crystal boundary dispersion in its tissue
Go out.Immediately, in vertical curved segment middle and late stage, need to guarantee that strand corner fast temperature rising, to complete austenitizing temperature, realizes strand corner
Tissue is changed from ferrite to austenite, completes phase transition process twice, realizes tissue crystal grain refinement；
The patent of invention of Patent No. 201010259985.1, discloses a kind of integrally increase in the vertical curved segment of conticaster and connects
Strand is wide, 2～5 times of the leptoprosopy water yield, it is ensured that with 3～10 DEG C/s coolings quickly cooling but, control blank surface organizes crystal boundary to casting billet surface
The method of microalloy element Carbonitride Precipitation.However, the patented technology integrally increases continuous casting billet width, the leptoprosopy water yield, Shi Bijia
Fast strand entirety setting rate, changes casting blank solidification end position, so as to change casting blank solidification end soft reduction process；Secondly, should
Patent only guarantees casting billet surface fast cooling, and it rises again control technique only to suppressing Carbonitride Precipitation beneficial without strand, mistake
Big casting billet surface rate of cooling easily induces casting billet surface to generate the tissues such as the higher martensite of crack sensitivity, aggravates strand
Crackle on the generation face of surface；Furthermore, actual continuous casting production process, the strand leptoprosopy in the vertical curved segment of conticaster is not typically sprayed water
Cooling, only implements the patented technology under traditional casting machine equipment condition, and strand corner temperature cannot often realize real fast prompt drop
Temperature；Additionally, the patented technology is due to lacking strand corner Temperature Feedback, also cannot in time, accurately dynamic control continuous casting
During the strand corner temperature change that caused due to technique changes such as pulling rate and molten steel overheats.
Equally, the patent of invention of Patent No. 201210348907.8, discloses a kind of reduction micro alloyed steel slab corner
Two cold control cooling methods of transverse crack, by cooling water inflow and water spraying mode in the vertical curved segment of control, with 3～8 DEG C/s rate of cooling
Cooling strand, realizes the strong cold of strand；The method is similar with the patent thought of Patent No. 201010259985.1, same to adopt
The mode of the overall increase continuous casting billet water yield realizes that strand corner cools down by force.Therefore.Casting blank solidification end can be equally caused to depress work
Skill changes and cannot in good time, accurately dynamic control continuous casting production process is due to pulling rate due to lacking strand corner Temperature Feedback
The problems such as strand corner temperature change caused with the technique change such as molten steel overheat；
Additionally, in actual steel continuous casting production process, the section width of strand often changes, above-mentioned patent is not related to yet
And the correlation technique that matches with casting blank section change width and method, not with universality；
Corner temperature is in sufficient roller with vertical curved segment in order to realize different section micro alloyed steel sheet billet continuous casting production process
Strong cooling and intelligent and precision control of rising again greatly, realize that microalloy carbonitride disperse is organized in micro-alloyed steel continuous casting base corner
Change to separate out and become crystal grain refinement Precise control with two-phase, make strand corner generate high-ductility, the tissue of strong anti-crack ability, and protect
Confirmation is applied and will not change follow-up strand production technology after the strong cooling technique in the corner, need to develop a kind of intelligent precise control continuous casting billet
The system and method for corner crystal grain refinement.
The content of the invention
For the deficiencies in the prior art, the present invention proposes a kind of control system and method for continuous casting billet corner crystal grain refinement,
With realize intelligent, precision control different section size micro-alloyed steel continuous casting base production process corner conticaster foot roller with it is vertical
Cooling in curved segment, realizes that strand corner tissue microalloy element carbonitride dispersion separates out to become with two-phase and refines its crystal grain chi
Very little Precise control, reach greatly improve strand corner tissue anti-crack ability, while and can at utmost reduce correspondence technique
The purpose that follow-up continuous casting control technique is impacted.
A kind of control system of continuous casting billet corner crystal grain refinement, the system includes：Realize the temperature intelligent control of strand corner
Host computer, PLC, be suitable for casting blank section change width and for strand corner spraying cooling cool water shower fill
Put, can lead to the strand corner Non-contact Infrared Temperature Measurement device of compressed air；
Wherein, described cool water shower device is arranged at crystallizer narrow-face foot roller fixed plate lower end and the company of being secured to
Connect, described strand corner Non-contact Infrared Temperature Measurement device is arranged at cool water shower device lower end and is secured to connection,
Described host computer input connection strand corner Non-contact Infrared Temperature Measurement device, the outfan connection PLC controls of host computer
The input of device, the outfan connection cool water shower device of PLC.
Described is suitable for casting blank section change width and for the cool water shower device of strand corner spraying cooling, should
Device includes：Spraying rack and shower, described spraying rack includes multiple showers of vertical a main fix bar and level
Connecting rod；
Wherein, described main fix bar is fixedly connected and communicates with the horizontal centre position of shower connecting rod, is formed and is supplied water
Loop, described multiple shower connecting rods are arranged in main fix bar, described spray along casting stream direction by same intervals width
Pipe connecting rod two ends are each provided with shower.
Described shower is installed on the two ends of each shower connecting rod, described certain angle according to certain angle
For：In shower alignment strand during outer arc angle portion, the angle that shower is formed with shower connecting rod；Described shower,
Its nozzle is the circular or flat nozzle with 60 °～80 ° spray angles.
Described main fix bar lower end is concordant with the vertical curved segment buckled zone entrance of strand.
Described water supply loop is connected with crystallizer narrow-face foot roll segment water supply loop.
The strand corner Non-contact Infrared Temperature Measurement device of described led to compressed air, the device includes：Compression can be led to
The infrared temperature probe fixed mount of air and infrared temperature probe, described infrared temperature probe fixed mount includes：One vertically
The main fix bar of infrared temperature probe, the infrared temperature probe connecting rod of two levels and four infrared temperature probes lay dress
Put；
Wherein, the main fix bar of described infrared temperature probe is fixed with the horizontal centre position of infrared temperature probe connecting rod and connected
Connect and communicate, form ventilating return, the infrared temperature probe connecting rod of two described levels is curved positioned at the vertical curved segment of strand respectively
Bent area's entrance is arranged at infrared temperature probe connecting rod with the vertical curved segment exit of strand, described infrared temperature probe placing device
Two ends, infrared temperature probe is arranged inside infrared temperature probe placing device.
Described infrared temperature probe placing device, its one end is communicated with infrared temperature probe connecting rod, and the other end is to open
Mouthful, outer arc angle portion in the opening alignment strand, infrared temperature probe placing device is internally provided with to be visited for fixing infrared measurement of temperature
The draw-in groove of head, above-mentioned draw-in groove is circumferentially evenly distributed with the through hole for blast injection.
The main fix bar upper end of described infrared temperature probe is fixedly connected with the main fix bar outside of spraying rack, and infrared survey
The main fix bar upper end of temperature probe is concordant with the main fix bar upper end of spraying rack, and the main fix bar upper end of infrared temperature probe is empty with compression
Feed channel is connected.
The output line of described infrared temperature probe by infrared temperature probe fixed mount and compressed air piping with
Host computer is connected.
The control method carried out using the control system of continuous casting billet corner crystal grain refinement, is comprised the following steps：
Step 1, according to the complete ferritizing temperature and complete austenitizing temperature requirement of produced steel grade, determine continuous casting
Base corner is in the vertical curved segment buckled zone porch ferritizing target surface temperature with the complete austenitizing of vertical curved segment exit completely
Degree, and be arranged in host computer；
Step 2, according to set target surface temperature, using numerical simulation computational methods sufficient roll segment cold to continuous casting billet two
It is simulated with the temperature field in vertical curved segment, so that it is determined that the cold sufficient roll segment width of the casting machine two for meeting above-mentioned target surface temperature requirement
Three area's initial waters in the initial water yield in 2nd area, vertical curved segment in the initial water yield in face, the initial water yield of the cold foot roller segment narrow surface of casting machine two, vertical curved segment
The initial water yield in 4th area and it is suitable for casting blank section change width and is directed to the cooling water of strand corner spraying cooling in amount, vertical curved segment
The initial water yield of spray equipment；
Step 3, activation system, cool water shower device is sprayed to outer arc angle portion in strand, and adopts infrared measurement of temperature
The current continuous casting billet of probe real-time monitoring and will be adopted in the surface temperature in vertical curved segment buckled zone entrance and each corner in vertical curved segment exit
The temperature value of collection is sent into host computer carries out periodicity storage；
Step 4, according to collection temperature value with setting target surface temperature, sufficient roll segment width face cold to casting machine two, leptoprosopy,
The cooling water inflow that issues in the area of vertical curved segment two and cool water shower device water route is adjusted, and comprises the following steps that：
Step 4-1, according to the cycle of collection, to four strand corner temperature difference of the vertical curved segment buckled zone entrance that gathered
Averaged；
Whether step 4-2, each corner temperature averages of the vertical curved segment buckled zone entrance strand of judgement are more than the object table for setting
Face temperature value, if so, then execution step 4-3, otherwise, execution step 4-4；
Step 4-3, the wide face of the cold sufficient roll segment of casting machine two, leptoprosopy, the vertical area water route increment of adjustment coefficient of curved segment two are set as 1, it is cold
But increment of adjustment coefficient in water spray system water route is 2, execution step 4-7；
Step 4-4, the target surface temperature for judging each corner temperature averages of vertical curved segment buckled zone entrance strand and setting
Absolute difference between value whether less than or equal to the tolerance of setting, if so, then execution step 4-5, otherwise, execution step 4-
6；
Step 4-5, the wide face of the cold sufficient roll segment of setting casting machine two, leptoprosopy, the vertical area of curved segment two and cool water shower device water route
Increment of adjustment coefficient is 0, execution step 4-7；
Step 4-6, the wide face of the cold sufficient roll segment of casting machine two, leptoprosopy, the vertical area water route increment of adjustment coefficient of curved segment two are set as -1, on
Cool water shower device water route increment of adjustment coefficient is -2, execution step 4-7；
Step 4-7, the wide face of the cold sufficient roll segment of casting machine two according to setting, leptoprosopy, the vertical area of curved segment two and cool water shower dress
Put water route increment of adjustment coefficient, be multiplied by increment of adjustment, automatically adjust the wide face of the cold sufficient roll segment of casting machine two, leptoprosopy, the vertical area of curved segment two with
And cool water shower device water route issues cooling water inflow；
Step 4-8, according to the cycle of collection, four, the vertical curved segment exit strand corner temperature to being gathered asks for respectively
Meansigma methodss；
Whether step 4-9, each corner temperature averages of the vertical curved segment exit strand of judgement are less than the target surface temperature for setting
Angle value, if so, then execution step 4-10, otherwise, execution step 4-11；
Step 4-10, the water route increment of adjustment coefficient in the Leng Sanqu of casting machine two and 4th area is set as -1, execution step 4-14；
Step 4-11, judge the vertical each corner temperature averages of curved segment exit strand and setting target surface temperature value it
Between difference whether less than or equal to the tolerance of setting, if so, then execution step 4-12, otherwise, execution step 4-13；
Step 4-12, the water route increment of adjustment coefficient in the Leng Sanqu of casting machine two and 4th area is set as 0, execution step 4-14；
Step 4-13, the water route increment of adjustment coefficient in the Leng Sanqu of casting machine two and 4th area is set as 1, execution step 4-14；
The water route increment of adjustment coefficient of step 4-14, the Leng Sanqu of casting machine two according to setting and 4th area, is multiplied by increment of adjustment,
Automatically adjust the Leng Sanqu of casting machine two and four area water routes issues cooling water inflow；
Step 5, return execution step 3, until throwing terminates.
Advantage of the present invention：
The present invention proposes a kind of control system and method for continuous casting billet corner crystal grain refinement, by hanging down in the vertical curved segment of conticaster
Straight area Zhu Liu both sides introduce and are suitable for casting blank section change width and for the cool water shower machine of the strong spraying cooling in strand corner
Structure and in vertical curved segment buckled zone entrance and vertical curved segment exit install can Real-time Feedback strand corner temperature non-contact infrared
In-Line Temperature Measure System, In-Line Temperature Measure System is in real time by strand corner in the strand corner in vertical curved segment bending point and vertical curved segment exit
Temperature is uploaded to strand corner Temperature Intelligent Control System, and strand corner Temperature Intelligent Control System is according to strand corner temperature ratio
Become refining temperature with two-phase according to the tissue microalloy Carbonitride Precipitation dispersion cooling of different micro-alloyed steel continuous casting base corners
Require, the water yield of dynamic control conticaster foot roller width/leptoprosopy, above-mentioned spraying mechanism and vertical curved segment Nei Ge area, intelligence, accurate control
Cooling of the continuous casting production process different section width strand corner processed in vertical curved segment, to meet different type micro alloyed steel strand
Corner is organized in the microalloy carbonitride dispersion in vertical curved segment and separates out and crystal grain refinement control temperature evolution requirement；
The present invention can accurately, Based Intelligent Control continuous casting billet standing curved segment in intensity of cooling, realize the phase transformation twice of strand corner,
Refine its tissue crystallite dimension simultaneously its transgranular and crystal boundary microalloy Carbonitride Precipitation of tissue of dispersion；The present invention is by introducing pin
To the strong spraying cooling spraying mechanism in strand corner, can at utmost reduce control process implementing process and subsequent production technique is produced
Impact；The present invention is accurately controlled temperature of the continuous casting billet corner in vertical curved segment in correspondence target temperature ± 5 DEG C a small range
Fluctuation；The present invention has the stronger suitability, it is adaptable to which at present iron and steel enterprise's main flow conventional plate blank and Slab Caster are appointed
The continuous casting billet production of meaning section width and crucial steel grade.
Description of the drawings
Fig. 1 is the control system schematic diagram of the continuous casting billet corner crystal grain refinement of an embodiment of the present invention, wherein, 1 is upper
Position machine, 2 be PLC, 3 be cool water shower device, 4 be strand corner Non-contact Infrared Temperature Measurement device, 5 be crystallizer
Narrow-face foot roll segment, 6 are strand；
Fig. 2 is suitable for casting blank section change width and for strand corner spraying cooling for an embodiment of the present invention
Cool water shower apparatus structure schematic diagram, wherein, 3-1 be spraying rack, 3-2 be shower, fix bar, 3-1-2 are based on 3-1-1
Shower connecting rod；
Fig. 3 bows for the cool water shower device of an embodiment of the present invention with strand corner Non-contact Infrared Temperature Measurement device
View, wherein, 4-1 is the main fix bar of infrared temperature probe, 4-2 is infrared temperature probe connecting rod, 4-3 is infrared temperature probe
Placing device；
Cool water shower devices and strand corner Non-contact Infrared Temperature Measurement device master of the Fig. 4 for an embodiment of the present invention
View；
Fig. 5 is the infrared temperature probe placing device front view of an embodiment of the present invention, wherein, 4-4 is infrared measurement of temperature
Probe 4-5 is logical temperature measurement signal transmission line, 4-3-1 is front end draw-in groove, 4-3-2 is rear end draw-in groove；
Fig. 6 is the infrared temperature probe placing device left view of an embodiment of the present invention；
Fig. 7 is the control method flow chart of the continuous casting billet corner crystal grain refinement of an embodiment of the present invention.
Specific embodiment
An embodiment of the present invention is described further below in conjunction with the accompanying drawings.
In the embodiment of the present invention, as shown in figure 1, the control system of continuous casting billet corner crystal grain refinement includes：Realize strand angle
The host computer 1 of portion temperature intelligent control, PLC 2, it is suitable for casting blank section change width and cold for strand corner spray
But cool water shower device 3, the strand corner Non-contact Infrared Temperature Measurement device 4 that compressed air can be led to；
In the embodiment of the present invention, as shown in figure 1, described cool water shower device 3 is arranged at crystallizer narrow-face foot roller consolidating
Fixed board lower end is simultaneously secured to connection, makes spraying rack 3-1 that the leptoprosopy of strand 6 is entirely parallel with vertical curved segment；Described strand
Corner Non-contact Infrared Temperature Measurement device 4 is arranged at the lower end of cool water shower device 3 and is secured to connection, described host computer
1 input connection strand corner Non-contact Infrared Temperature Measurement device 4, the outfan of host computer 1 connects the input of PLC 2
End, the outfan connection cool water shower device 3 of PLC 2；
In the embodiment of the present invention, as shown in Fig. 2 being suitable for casting blank section change width and for strand corner spraying cooling
Cool water shower device 3 include：Spraying rack 3-1 and shower 3-2, described spraying rack 3-1 is solid including a vertical master
(number of shower connecting rod 3-1-2 is 6 to 3～7 shower connecting rods 3-1-2 of fixed pole 3-1-1 and level in the present embodiment
It is individual), described main fix bar 3-1-1 is fixedly connected and communicates with the horizontal centre position of shower connecting rod 3-1-2, is formed and is supplied water
Loop, for shower 3-2 cooling water is provided, and described multiple shower connecting rods 3-1-2 press same intervals width along casting stream direction
Degree is arranged in main fix bar 3-1-1, and described shower connecting rod 3-1-2 two ends are each provided with shower 3-2；Described master consolidates
Fixed pole 3-1-1 and shower connecting rod 3-1-2 are square or circular configuration, and installation one is secondary per side to stand curved segment both sides in strand 6；
It is main solid depending on the length of whole spraying rack is according to the vertical curved segment construction featuress of different conticasters in the embodiment of the present invention
Fixed pole 3-1-1 lower end is concordant with vertical curved segment buckled zone entrance；Spraying rack Breadth Maximum design principle in the horizontal direction is：Peace
Loaded between the spray pipe ends of same row 2 thereon apart from l1≤ 3/5 crystallizer exit slab thickness, to guarantee spraying rack
Smoothly load in vertical curved segment；As shown in figure 3, shower 3-2 with nozzle end and the wide face direction of strand in 16 °～45 ° of θ2Angle
Form is installed on the two ends of every row's shower connecting rod 3-1-2, it is ensured that shower 3-2 is respectively aligned to outer arc angle portion spray in strand
Drench cooling；Meanwhile, in order to increase strand corner catchment area as far as possible, selected shower 3-2 is nozzle spray angle θ1
For 60 ° -80 ° of circular or flat nozzle, nozzle end and strand corner distance 10～15cm of holding；Spraying rack water supply loop leads to
Cross main fix bar 3-1-1 of spraying rack to be connected with crystallizer narrow-face foot roll segment water supply loop, be spray by crystallizer narrow-face foot roll segment 5
Frame provides cooling water of the pressure in more than 0.6Mpa；
In the embodiment of the present invention, as shown in figure 4, the strand corner Non-contact Infrared Temperature Measurement device 4 of compressed air can be led to,
The device includes：The infrared temperature probe fixed mount and infrared temperature probe 4-4 of compressed air can be led to, described infrared measurement of temperature is visited
Head frame includes：Main fix bar 4-1 of one vertical infrared temperature probe, infrared temperature probe connecting rod 4- of two levels
2 and four infrared temperature probe placing device 4-3；
In the embodiment of the present invention, in the middle of main fix bar 4-1 of infrared temperature probe and infrared temperature probe connecting rod 4-2 level
Position is fixedly connected and communicates, and forms ventilating return, provides protection for infrared temperature probe and breaks up the thermometric region steam of strand 6
Compressed air and logical temperature measurement signal transmission line 4-5, infrared temperature probe connecting rod 4-2 of two described levels distinguishes position
In vertical curved segment buckled zone entrance and vertical curved segment exit, described infrared temperature probe placing device 4-3 is arranged at infrared measurement of temperature
Probe connecting rod 4-2 two ends, infrared temperature probe 4-4 is arranged inside infrared temperature probe placing device 4-3；Infrared measurement of temperature is visited
Main fix bar 4-1 upper end is fixedly connected with the main fix bar 3-1-1 outside of spraying rack, and main fix bar 4- of infrared temperature probe
1 upper end is concordant with the main fix bar 3-1-1 upper end of spraying rack, and the main fix bar 4-1 length of infrared temperature probe is from spraying rack
Hold and extended to vertical curved segment outlet along casting stream direction, through whole vertical curved segment, and the material of whole fixing device has been interior sky
Square tube or pipe；The main fix bar 4-1 upper end of infrared temperature probe is connected with compressed air piping, and compressed air is filled by the fixation
Infrared temperature probe connecting rod 4-2 put main fix bar 4-1 and communicate therewith connection is delivered to infrared temperature probe placing device
At 4-3；
Infrared temperature probe connecting rod 4-2 Design of length principle is：The 2 side infrared temperature probes for being secured to connect are laid
Between device 4-3 ends apart from l2≤ 3/5 vertical curved segment exit roll gap width, to ensure that temperature probe smoothly loads vertical curved segment；
Infrared temperature probe 4-4 is fixedly installed in infrared temperature probe connecting rod 4-2 two ends in 16 °～45 ° of θ according to its shape3
In tubular that angle is connected or square shape placing device 4-3, as shown in Figure 3.
In the embodiment of the present invention, as shown in figure 5, infrared temperature probe placing device 4-3, its one end and infrared temperature probe
Connecting rod 4-2 is communicated, and the other end is opening, outer arc angle portion in the opening alignment strand 6, infrared temperature probe placing device 4-3
The draw-in groove (front end draw-in groove 4-3-1, rear end draw-in groove 4-3-2) for fixing infrared temperature probe 4-4 is internally provided with, such as Fig. 6 institutes
Show, draw-in groove is circumferentially evenly distributed with the through hole for blast injection；Infrared temperature probe placing device 4-3 can be by infrared survey
Temperature probe 4-4 is integrally wrapped up, and the cooled water projections of effective protection infrared temperature probe 4-4 are arrived；Meanwhile, compressed air is by surveying
Front end draw-in groove 4-3-1 and rear end draw-in groove 4-3-2 small sircle holes around temperature probe is ejected at a high speed, on the one hand can break up strand corner
Intend the steam of thermometric areas adjacent, it is ensured that the accurate thermometrics of infrared temperature probe 4-4, on the other hand can further prevent from cooling down water smoke
Into in temperature probe 4-4；Described infrared temperature probe 4-4 is contactless temperature-measuring probe, comes with temperature measurement signal output
Function, it is 10～15cm that infrared temperature probe 4-4 intends the interregional distance of thermometric with strand corner, can exactly by institute by it
The strand corner temperature data for measuring reaches in real time host computer 1, data signal line one end and infrared measurement of temperature by signal transmssion line
Probe 4-4 is connected, and the other end is passed through from infrared temperature probe fixing device 4-3 inner chamber, is connected to host computer 1, real-time Transmission by
The strand corner Temperature Intelligent Control System of the real time temperature signal to position machine 1 that infrared temperature probe 4-4 sends.
In the embodiment of the present invention, the strand corner Temperature Intelligent Control System of host computer 1 include temperature data receiver module,
Steel grade physical parameter storage/read module, temperature comparisons' discrimination module, loop water yield adjustment module；Described temperature data connects
Module is received, with curved with vertical by the vertical curved segment buckled zone entrance that signal transmssion line is reached in real time by 1 secondary frequencies per second reception simultaneously
The function of the 8 strand corner temperature in section exit, and it is in real time that each corner temperature of the strand of corresponding position is in chronological sequence suitable
Sequence is stored in corresponding array.Array data length typically takes 5～10 groups, and after full 5～10 groups of data its meansigma methods is calculated, and
Send to temperature comparisons' discrimination module, the data in array then removed automatically, carry out 5～10 groups of data receivers of next cycle with
Storage；Described steel grade physical parameter storage/read module, the different steel grade process of setting of storage are completely ferritizing to require temperature
(generally less than 700 DEG C) require temperature (typically taking more than 950 DEG C) with complete austenitizing, and require that temperature is sent out by corresponding
Deliver to temperature comparisons' discrimination module；Described temperature comparisons' discrimination module, temperature data receiver module is pressed and storage of array week
The phase same time vertical curved segment buckled zone entrance that sends of interval and 8, vertical curved segment exit strand corner temperature averages with it is right
Answer the complete ferritizing and complete austenitizing requirement temperature at position to carry out contrast differentiation, obtain caster two cold foot roll segment
Wide face and leptoprosopy, each loop water yield increment of adjustment coefficient of vertical curved segment Nei Erqu, 3rd area, 4th area and cool water shower device,
Adjust so that loop water yield adjustment module carries out water yield increase and decrease to each loop；Described loop water yield adjustment module, according to temperature
The runoff investigation increment coefficient that contrast discrimination module sends, is multiplied by increment of adjustment, automatically adjusts the cooling water inflow in correspondence loop；
In the embodiment of the present invention, PLC is using the PLC with the existing each two cold cooling water runoff investigation in scene
Same model, sends a control signal to electromagnetic valve, the width of crystallizer narrow-face foot roll segment 5 of the water supply loop of cool water shower device 3
The electromagnetic valve of 2nd area of cooling, 3rd area and four area's water supply loops, adjusts injection flow rate in the electromagnetic valve of face water supply loop and vertical curved segment.
The control method carried out using the control system of continuous casting billet corner crystal grain refinement, method flow as shown in fig. 7, comprises
Following steps：
Step 1, according to the complete ferritizing temperature and complete austenitizing temperature requirement of produced steel grade, determine continuous casting
Base corner is in the vertical curved segment buckled zone porch ferritizing target surface temperature with the complete austenitizing of vertical curved segment exit completely
Degree T1With T2, and be arranged in host computer；
In the embodiment of the present invention, by target surface temperature T1With T2Store to strand corner Temperature Intelligent Control System steel grade
Physical parameter storage/read module；
Step 2, according to set target surface temperature, using numerical simulation computational methods sufficient roll segment cold to continuous casting billet two
It is simulated with the temperature field in vertical curved segment, so that it is determined that the cold sufficient roll segment width of the casting machine two for meeting above-mentioned target surface temperature requirement
Three area's initial waters in the initial water yield in 2nd area, vertical curved segment in the initial water yield in face, the initial water yield of the cold foot roller segment narrow surface of casting machine two, vertical curved segment
The initial water yield in 4th area and it is suitable for casting blank section change width and is directed to the cooling water of strand corner spraying cooling in amount, vertical curved segment
The initial water yield of spray equipment；
It is completely ferritizing curved with vertical in vertical curved segment buckled zone porch according to above-mentioned strand corner in the embodiment of the present invention
Section exit complete austenitizing target surface temperature T1With T2Require, using numerical simulation computational methods to the cold foot of continuous casting billet two
Roll segment is simulated calculating with the temperature field in vertical curved segment, and its calculating process is：
(including pulling rate, molten steel pouring temperature, crystallizer width face cooling water inflow and its entered according to continuous casting scene main flow operating mode
Cooling water inflow mouthful with the water temperature difference for exporting, the wide face of two cold sufficient roll segments and the leptoprosopy water yield, two Leng Erqu, 3rd area and 4th area), pass through
Computer sets up the cold temperature field two dimensional finite element simulation calculation mould of continuous casting billet two for producing steel grade using Ansys finite element softwares
Type, is simulated to the cold temperature field of continuous casting billet two；Then, it is cold by changing casting machine two in two dimensional finite element Simulation Calculation
The wide face of sufficient roller and leptoprosopy, the vertical area of curved segment two, 3rd area, 4th area and the new spraying mechanism introduced for the strong spraying cooling in strand corner
Different secondary coolingwater design conditions, obtain thermo parameters method of the corresponding continuous casting billet in two cold vertical curved segments；And compare really
The vertical curved segment buckled zone entrance of fixed continuous casting billet is completely ferritizing to require temperature T1Complete austenitizing temperature is exported with vertical curved segment
Require temperature T2, determined according to results of comparison and meet continuous casting billet corner simultaneously in two cold vertical curved segment buckled zone entrances up to complete ferrum element
Bodyization requires temperature T1Complete austenitizing temperature requirement temperature T is exported with vertical curved segment2The cold sufficient roller width face of casting machine two and leptoprosopy,
The area of vertical curved segment two, 3rd area, 4th area and the new each loop water yield of spraying mechanism introduced for the strong spraying cooling in strand corner, and will
It is set as the initial water yield of each cooling zone of correspondence；
Step 3, activation system, cool water shower device is sprayed to outer arc angle portion in strand, and adopts infrared measurement of temperature
The current continuous casting billet of probe real-time monitoring will be adopted in vertical curved segment buckled zone entrance and each corner corner surface temperature in vertical curved segment exit
The temperature value of collection is sent into host computer carries out periodicity storage；
In the embodiment of the present invention, the current continuous casting billet of infrared temperature probe real-time monitoring is curved with vertical in vertical curved segment buckled zone entrance
The each corner corner surface temperature in section exit, is recorded as respectively Ti1(vertical curved segment buckled zone entrance the 1st corner temperature of strand),
Ti2(vertical curved segment buckled zone entrance the 2nd corner temperature of strand), Ti3(vertical curved segment buckled zone entrance the 3rd corner temperature of strand),
Ti4(vertical curved segment buckled zone entrance the 4th corner temperature of strand) and To1(vertical curved segment outlet the 1st corner temperature of strand), To2It is (vertical
Curved segment export the 2nd corner temperature of strand), To3(vertical curved segment outlet the 3rd corner temperature of strand), To4(vertical curved segment outlet strand
4th corner temperature)；And said temperature data are sent in host computer；Strand corner temperature intelligent control in host computer
The temperature data receiver module of system receives the temperature data that each signal transmssion line is transmitted by 1 secondary frequencies per second, and by 5～10s
One storage cycle sequences is stored to length and corresponded in the array of 5～10 groups of temperature sequences；
Step 4, according to collection temperature value with setting target surface temperature, sufficient roll segment width face cold to casting machine two, leptoprosopy,
The cooling water inflow that issues in the area of vertical curved segment two and cool water shower device water route is adjusted, and comprises the following steps that：
Step 4-1, according to the cycle of collection, to four strand corner temperature difference of the vertical curved segment buckled zone entrance that gathered
Averaged；
In the embodiment of the present invention, when the data stored in the corresponding storage array in each strand corner are full 5～10 groups, meter
Its meansigma methods is calculated for Ti1-ave、Ti2-ave、Ti3-ave、Ti4-aveAnd To1-ave、To2-ave、To3-ave、To4-ave, and send to temperature comparisons
Discrimination module, removes immediately all data in array, carries out next cycle reception and storage；
Step 4-2, each corner temperature averages T of the vertical curved segment buckled zone entrance strand of judgementi1-ave、Ti2-ave、Ti3-ave、
Ti4-aveWhether more than target surface temperature value T for setting1, if so, then execution step 4-3, otherwise, execution step 4-4；
Step 4-3, the wide face of the cold sufficient roll segment of casting machine two, leptoprosopy, the vertical area water route increment of adjustment coefficient of curved segment two are set as 1, it is cold
But increment of adjustment coefficient in water spray system water route is 2, execution step 4-7；
Step 4-4, each corner temperature averages T of the vertical curved segment buckled zone entrance strand of judgementi1-ave、Ti2-ave、Ti3-ave、
Ti4-aveWith target surface temperature value T of setting1Between absolute difference whether less than or equal to 5 DEG C of the tolerance of setting, if
It is, then execution step 4-5, otherwise, execution step 4-6；
Step 4-5, the wide face of the cold sufficient roll segment of setting casting machine two, leptoprosopy, the vertical area of curved segment two and cool water shower device water route
Increment of adjustment coefficient is 0, execution step 4-7；
Step 4-6, the wide face of the cold sufficient roll segment of casting machine two, leptoprosopy, the vertical area water route increment of adjustment coefficient of curved segment two are set as -1, on
Cool water shower device water route increment of adjustment coefficient is -2, execution step 4-7；
Step 4-7, the wide face of the cold sufficient roll segment of casting machine two according to setting, leptoprosopy, the vertical area of curved segment two and cool water shower dress
Put water route increment of adjustment coefficient, be multiplied by increment of adjustment, automatically adjust the wide face of the cold sufficient roll segment of casting machine two, leptoprosopy, the vertical area of curved segment two with
And cool water shower device water route issues cooling water inflow；
In the embodiment of the present invention, by the water route increment of adjustment coefficient for being obtained, increment of adjustment 2L/min is multiplied by, system is issued
Electromagnetic valve opening degree instruction is to PLC, and then each area water route water rate control electromagnetic valve of PLC triggering correspondence, realizes certainly
It is dynamic to adjust the wide face of the cold sufficient roll segment of casting machine two, leptoprosopy, the vertical area of curved segment two and above-mentioned new introducing and be directed to the strong spraying cooling in strand corner
Spraying mechanism water route issues cooling water inflow；Curved segment buckled zone entrance strand corner temperature stabilization to be stood is in complete ferritizing temperature
Degree T1Afterwards, vertical curved segment Nei Sanqu of casting machine and four area's cooling water inflows are automatically adjusted, makes the strand corner temperature in vertical curved segment exit steady
Due to complete austenitizing temperature T2；
Step 4-8, according to the cycle of collection, four, the vertical curved segment exit strand corner temperature to being gathered asks for respectively
Meansigma methodss To1-ave、To2-ave、To3-ave、To4-ave；
Step 4-9, the judgement each corner temperature averages T of vertical curved segment exit strando1-ave、To2-ave、To3-ave、To4-aveIt is
No target surface temperature value T less than setting2, if so, then execution step 4-10, otherwise, execution step 4-11；
Step 4-10, the water route increment of adjustment coefficient in the Leng Sanqu of casting machine two and 4th area is set as -1, execution step 4-14；
Step 4-11, the judgement each corner temperature averages T of vertical curved segment exit strando1-ave、To2-ave、To3-ave、To4-ave
With target surface temperature value T of setting2Between absolute difference whether less than or equal to 5 DEG C of the tolerance of setting, if so, then hold
Row step 4-12, otherwise, execution step 4-13；
Step 4-12, the water route increment of adjustment coefficient in the Leng Sanqu of casting machine two and 4th area is set as 0, execution step 4-14；
Step 4-13, the water route increment of adjustment coefficient in the Leng Sanqu of casting machine two and 4th area is set as 1, execution step 4-14；
The water route increment of adjustment coefficient of step 4-14, the Leng Sanqu of casting machine two according to setting and 4th area, is multiplied by increment of adjustment,
Automatically adjust the Leng Sanqu of casting machine two and four area water routes issues cooling water inflow；
In the embodiment of the present invention, the water route increment of adjustment coefficient in the Leng Sanqu of casting machine two and 4th area, is multiplied by according to determined by
Increment of adjustment 2L/min, solenoid valve opening degree instruction is to PLC under system, and then each area's water of PLC triggering correspondence
Road water rate control electromagnetic valve, what realization automatically adjusted the Leng Sanqu of casting machine two and four area water routes issues cooling water inflow；
Step 5, return execution step 3, until throwing terminates.
Claims (9)
1. the control system of a kind of continuous casting billet corner crystal grain refinement, it is characterised in that the system includes：Realize strand corner temperature
The host computer of Based Intelligent Control, PLC, it is suitable for casting blank section change width and for the cooling of strand corner spraying cooling
Water spray system, the strand corner Non-contact Infrared Temperature Measurement device that compressed air can be led to；
Wherein, described cool water shower device is arranged at crystallizer narrow-face foot roller fixed plate lower end and is secured to connection, institute
The strand corner Non-contact Infrared Temperature Measurement device stated is arranged at cool water shower device lower end and is secured to connection, described
Host computer input connection strand corner Non-contact Infrared Temperature Measurement device, the outfan of host computer connects the defeated of PLC
Enter end, the outfan connection cool water shower device of PLC；
The strand corner Non-contact Infrared Temperature Measurement device of described led to compressed air, the device includes：Compressed air can be led to
Infrared temperature probe fixed mount and infrared temperature probe, described infrared temperature probe fixed mount includes：One vertical red
The main fix bar of outer temperature probe, the infrared temperature probe connecting rod of two levels and four infrared temperature probe placing devices；
Wherein, the main fix bar of described infrared temperature probe be fixedly connected with the horizontal centre position of infrared temperature probe connecting rod and
Communicate, form ventilating return, the infrared temperature probe connecting rod of two described levels is located at respectively the vertical curved segment buckled zone of strand
Entrance is arranged at infrared temperature probe connecting rod two with the vertical curved segment exit of strand, described infrared temperature probe placing device
End, infrared temperature probe is arranged inside infrared temperature probe placing device.
2. the control system of continuous casting billet corner according to claim 1 crystal grain refinement, it is characterised in that described is suitable for
Casting blank section change width and for the cool water shower device of strand corner spraying cooling, the device includes：Spraying rack and spray
Shower pipe, described spraying rack includes multiple shower connecting rods of vertical a main fix bar and level；
Wherein, described main fix bar is fixedly connected and communicates with the horizontal centre position of shower connecting rod, forms water supply loop,
Described multiple shower connecting rods are arranged in main fix bar, described shower connection along casting stream direction by same intervals width
Bar two ends are each provided with shower.
3. the control system of continuous casting billet corner according to claim 2 crystal grain refinement, it is characterised in that described shower
The two ends of each shower connecting rod are installed on according to certain angle, described certain angle is：Inside and outside shower alignment strand
During arc angle portion, the angle that shower is formed with shower connecting rod；Described shower, its nozzle is with 60 °～80 ° sprays
The circular or flat nozzle of firing angle degree.
4. the control system of continuous casting billet corner according to claim 2 crystal grain refinement, it is characterised in that described main fixation
Bar lower end is concordant with the vertical curved segment buckled zone entrance of strand.
5. the control system of continuous casting billet corner according to claim 2 crystal grain refinement, it is characterised in that described water supply is returned
Road is connected with crystallizer narrow-face foot roll segment water supply loop.
6. the control system of continuous casting billet corner according to claim 1 crystal grain refinement, it is characterised in that described infrared survey
Temperature probe placing device, its one end is communicated with infrared temperature probe connecting rod, and the other end is opening, inside and outside the opening alignment strand
Arc angle portion, infrared temperature probe placing device is internally provided with the draw-in groove for fixing infrared temperature probe, and above-mentioned draw-in groove is along week
To the through hole being evenly distributed with for blast injection.
7. the control system of continuous casting billet corner according to claim 1 crystal grain refinement, it is characterised in that described infrared survey
The temperature main fix bar upper end of probe is fixedly connected with the main fix bar outside of spraying rack, and the main fix bar upper end of infrared temperature probe and
The main fix bar upper end of spraying rack is concordant, and the main fix bar upper end of infrared temperature probe is connected with compressed air piping.
8. the control system of continuous casting billet corner according to claim 1 crystal grain refinement, it is characterised in that described infrared survey
The output line of temperature probe is connected by infrared temperature probe fixed mount and compressed air piping with host computer.
9. the control method for being carried out using the control system of the continuous casting billet corner crystal grain refinement described in claim 1, its feature is existed
In comprising the following steps：
Step 1, according to the complete ferritizing temperature and complete austenitizing temperature requirement of produced steel grade, determine continuous casting billet angle
Portion in the vertical curved segment buckled zone porch completely ferritizing target surface temperature with the complete austenitizing of vertical curved segment exit, and
In being arranged at host computer；
Step 2, according to set target surface temperature, using numerical simulation computational methods sufficient roll segment cold to continuous casting billet two with it is vertical
Temperature field in curved segment is simulated, so that it is determined that at the beginning of the cold sufficient roll segment width face of the casting machine two for meeting above-mentioned target surface temperature requirement
The initial water yield in 3rd area in the initial water yield in 2nd area, vertical curved segment in the beginning water yield, the initial water yield of the cold foot roller segment narrow surface of casting machine two, vertical curved segment,
In vertical curved segment the initial water yield in 4th area and be suitable for casting blank section change width and for strand corner spraying cooling cooling water spray
The initial water yield of shower device；
Step 3, activation system, cool water shower device is sprayed to outer arc angle portion in strand, and adopts infrared temperature probe
The current continuous casting billet of real-time monitoring vertical curved segment buckled zone entrance and each corner in vertical curved segment exit surface temperature, and by collection
Temperature value is sent into host computer carries out periodicity storage；
The target surface temperature of step 4, the temperature value according to collection and setting, it is sufficient roll segment width face cold to casting machine two, leptoprosopy, vertical curved
The cooling water inflow that issues in Duan Erqu and cool water shower device water route is adjusted, and comprises the following steps that：
Step 4-1, according to the cycle of collection, the four strand corner temperature of vertical curved segment buckled zone entrance to being gathered ask for respectively
Meansigma methodss；
Whether step 4-2, each corner temperature averages of the vertical curved segment buckled zone entrance strand of judgement are more than the target surface temperature for setting
Angle value, if so, then execution step 4-3, otherwise, execution step 4-4；
Step 4-3, the wide face of the cold sufficient roll segment of casting machine two, leptoprosopy, the vertical area water route increment of adjustment coefficient of curved segment two are set as 1, cooling water
Spray equipment water route increment of adjustment coefficient is 2, execution step 4-7；
Step 4-4, judge each corner temperature averages of vertical curved segment buckled zone entrance strand and setting target surface temperature value it
Between absolute difference whether less than or equal to the tolerance of setting, if so, then execution step 4-5, otherwise, execution step 4-6；
Step 4-5, the wide face of the cold sufficient roll segment of setting casting machine two, leptoprosopy, the vertical area of curved segment two and cool water shower device water route are adjusted
Increment coefficient is 0, execution step 4-7；
Step 4-6, the wide face of the cold sufficient roll segment of casting machine two, leptoprosopy, the vertical area water route increment of adjustment coefficient of curved segment two are set as -1, upper cooling
Water spray system water route increment of adjustment coefficient is -2, execution step 4-7；
Step 4-7, the wide face of the cold sufficient roll segment of casting machine two according to setting, leptoprosopy, the vertical area of curved segment two and cool water shower device water
Road increment of adjustment coefficient, is multiplied by increment of adjustment, automatically adjusts the wide face of the cold sufficient roll segment of casting machine two, leptoprosopy, the vertical area of curved segment two and cold
But water spray system water route issues cooling water inflow；
Step 4-8, according to the cycle of collection, four, the vertical curved segment exit strand corner temperature to being gathered asks for respectively averagely
Value；
Whether step 4-9, each corner temperature averages of the vertical curved segment exit strand of judgement are less than the target surface temperature value of setting,
If so, then execution step 4-10, otherwise, execution step 4-11；
Step 4-10, the water route increment of adjustment coefficient in the Leng Sanqu of casting machine two and 4th area is set as -1, execution step 4-14；
Step 4-11, judgement are stood between each corner temperature averages of curved segment exit strand and the target surface temperature value of setting
Difference whether less than or equal to the tolerance of setting, if so, then execution step 4-12, otherwise, execution step 4-13；
Step 4-12, the water route increment of adjustment coefficient in the Leng Sanqu of casting machine two and 4th area is set as 0, execution step 4-14；
Step 4-13, the water route increment of adjustment coefficient in the Leng Sanqu of casting machine two and 4th area is set as 1, execution step 4-14；
The water route increment of adjustment coefficient of step 4-14, the Leng Sanqu of casting machine two according to setting and 4th area, is multiplied by increment of adjustment, automatically
Adjust the Leng Sanqu of casting machine two and four area water routes issues cooling water inflow；
Step 5, return execution step 3, until throwing terminates.
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| CN107303601B (en) * | 2016-04-20 | 2020-03-06 | 宝山钢铁股份有限公司 | Cooling monitoring system and method for casting blank |
| CN107414049B (en) * | 2016-05-23 | 2020-01-21 | 上海梅山钢铁股份有限公司 | Refining control method for metallographic structure of surface layer of corner of continuous casting slab |
| CN106735035B (en) * | 2017-01-12 | 2019-07-02 | 首钢集团有限公司 | A method of reducing slab crackle |
| CN107695313B (en) * | 2017-08-22 | 2019-10-11 | 中冶连铸技术工程有限责任公司 | A kind of method and arrangement of nozzles method solving slab Corner Crackss |
| CN108480588A (en) * | 2018-03-30 | 2018-09-04 | 上海梅山钢铁股份有限公司 | A kind of continuous casting billet production method of mould steel |
| CN108405818B (en) * | 2018-04-13 | 2020-01-14 | 东北大学 | Device and process for improving corner structure plasticity of microalloyed steel sheet billet |
| CN110802205B (en) * | 2019-12-06 | 2022-04-26 | 马鞍山钢铁股份有限公司 | Control method and device for austenite grain size of continuous casting slab and product |
| CN112528432B (en) * | 2020-12-04 | 2023-10-10 | 东北大学 | Continuous casting billet solidification heat transfer calculation method considering non-uniform secondary cooling |
| CN112743055A (en) * | 2020-12-29 | 2021-05-04 | 马鞍山钢铁股份有限公司 | Crystallizer device for refining original austenite grain size of continuous casting slab corner |
| CN114042880A (en) * | 2021-10-15 | 2022-02-15 | 柳州钢铁股份有限公司 | Method for solving corner cracks of microalloyed steel continuous casting slab |
| CN115090847B (en) * | 2022-05-31 | 2024-03-08 | 天津钢铁集团有限公司 | Spray cooling control system and control method for corner of slab after exiting crystallizer |
| CN115069997A (en) * | 2022-05-31 | 2022-09-20 | 天津钢铁集团有限公司 | Casting blank corner spray cooling structure based on slab caster narrow surface foot roll |
| CN116944455B (en) * | 2023-09-06 | 2024-03-01 | 江苏群达机械科技有限公司 | High strength alloy gray cast iron manufacture equipment |
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| JP3117337B2 (en) * | 1993-09-24 | 2000-12-11 | 三菱重工業株式会社 | Spray cooling mold equipment for continuous casting |
| CN102489680B (en) * | 2011-12-28 | 2013-05-08 | 东北大学 | System and method for intelligently controlling temperature of internal arc angle part in straightening region of wide and thick plate blank |
| CN102814481B (en) * | 2012-08-29 | 2014-04-02 | 重庆大学 | Continuous casting secondary cooling dynamic control method based on online temperature measuring and heat transferring model |
| CN102861890A (en) * | 2012-09-19 | 2013-01-09 | 中冶南方工程技术有限公司 | Secondary cooling method for reducing transverse cracks of corners of microalloy sheet billet |
| CN202894257U (en) * | 2012-11-27 | 2013-04-24 | 圣力(福州)重工有限公司 | Improved structure of zero-section spray of tubular crystallizer for rectangular blank and cogged ingot |
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Application publication date: 20151118 Assignee: TIANJIN IRON & STEEL GROUP Co.,Ltd. Assignor: Northeastern University Contract record no.: X2020210000020 Denomination of invention: A control system and method for corner grain refinement of continuous casting billet Granted publication date: 20170412 License type: Common License Record date: 20201106 |
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