CN102632213A - Method for measuring and controlling surface temperature of casting blank and special device thereof - Google Patents
Method for measuring and controlling surface temperature of casting blank and special device thereof Download PDFInfo
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- CN102632213A CN102632213A CN201110036914XA CN201110036914A CN102632213A CN 102632213 A CN102632213 A CN 102632213A CN 201110036914X A CN201110036914X A CN 201110036914XA CN 201110036914 A CN201110036914 A CN 201110036914A CN 102632213 A CN102632213 A CN 102632213A
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Abstract
The invention relates to a method for measuring and controlling surface temperature of a casting blank and a special device thereof. The method for measuring and controlling surface temperature of the casting blank is applied in a secondary cooling interval in a molten steel continuous casting process and is characterized by comprising the steps of: measuring the surface temperature of the casting blank (4) in the secondary cooling interval in the molten steel continuous casting process, comparing the actual temperature of a measuring point with the ideal temperature of the measuring point and eliminating deviation through regulating the casting speed or changing the corresponding cooling water distribution flow when the deviation exists between the actual temperature and the ideal temperature. The special device disclosed by the invention has the advantages that the influence of water vapor and dust on the temperature measuring value can be effectively prevented; the temperature measuring accuracy is high; the installation is convenient; the real-time adjustment of the casting speed and the automatic control of the secondary cooling water distribution are realized; guarantees of preventing defect of the casting blank (4), increasing the quality of the casting blank (4), optimizing the production process and realizing the automatic control are provided.
Description
Technical field
The present invention relates to casting blank surface temperature measurement and control technology in the continuous casting of molten steel process, a kind of casting blank surface temperature measurement and control method and isolated plant thereof are provided especially.
Background technology
At present, widespread usage continuous casting process during iron and steel enterprise produces has been realized the automation of producing, and has optimized production process, has improved product quality and output.Continuous casting process is the heat transfer process of setting from liquid molten steel to solid-state strand, and temperature is one of them important control parameter.The surface temperature of strand 4 is important evidence of design two cold water distribution systems, and the control of the surface temperature of strand 4 is to guarantee the quality of strand 4 and the important means of output.Various underbead cracks in strand 4 defectives, center segregation and loose, face crack, casting blank bulging and strand water chestnut become etc., and be relevant with the surface temperature control of strand 4 to a great extent.Because two cold-zones are under high temperature, the water vapour environment, and there is the influence of factors such as moisture film, iron scale in the surface of strand 4, is difficult to the surface temperature of strand 4 is measured accurately.
In the prior art; Application number is the accurate assay method of surface temperature that discloses a kind of secondary cooling area for continuous casting strand 4 in the application open file of 01141418.9 Chinese patent " accurate measuring method of casted blank surface temperature of continuous casting secondary cold region ", and is not enough below the technology contents that this document disclosed exists:
1, " the thermometric distance is the temperature measuring head of temperature measurer and the vertical range between the continuous casting billet surface.Can be between 0.5～5 meter as the one of which ".Set forth the front, and two cold-zones are under high temperature, the water vapour environment, and the distance of temperature measuring head and strand 4 is between 0.5～5 meter; Do not take any anti-high temperature, anti-steam measure; Therefore, between the surface of temperature measuring head and strand 4, there is steam all the time, will makes thermometric numerical value on the low side.
2, temperature measuring head is not taked anti-steam and dust protection measure, and temperature measuring head can be caused the thermometric value on the low side by steam and contamination by dust.
3, temperature measuring head is not taked anti-high temperature measure, and during the thermometric close together, as 0.5～1 meter, the temperature measuring head meeting is cisco unity malfunction because environment temperature is too high.
4, the purpose measured of two cold-zone casting blank surface temperatures is that Position Control that casting blank surface temperature is different in two cold-zones is in corresponding zone of reasonableness.Application number is that 01141418.9 Chinese patent does not propose control method.
People expect to obtain the better casting blank surface temperature measurement of a kind of technique effect and control method and this method corresponding special device.
Summary of the invention
The purpose of this invention is to provide better casting blank surface temperature measurement of a kind of technique effect and control method and this method corresponding special device.
The invention provides a kind of casting blank surface temperature and measure and control method, be applied in the continuous casting of molten steel process between secondary cooling zone; It is characterized in that: in the continuous casting of molten steel process, between secondary cooling zone, (be called for short two cold-zones) surface temperature of strand 4 is measured; Compare according to this point measurement actual temperature and this ideal temperature; When there are deviation in actual temperature and ideal temperature; Through adjustment casting speed or the corresponding cooling of change distributed water flow, eliminate its deviation.
Casting blank surface temperature according to the invention is measured and control method, and what preferred requirement was protected thes contents are as follows:
In said casting blank surface temperature measurement and the control method; The concrete grammar of between the secondary cooling zone in the continuous casting of molten steel process casting blank surface temperature being measured is: use infrared temperature probe 7 to gather the radiation signal that send on strand 4 surfaces with the noncontact mode; And this signal transition exported to signal processor 8 for the corresponding signal of telecommunication; Signal processor 8 filters out obvious numerical value on the low side in the signal of collecting, and remaining is as valid data, and process calculates actual temperature; Compare with this temperature and ideal temperature, its deviation is as the foundation of control.
Said casting blank surface temperature is measured in the temperature measuring equipment that uses; Infrared temperature probe 7 is provided with the accurate target device 6 that is used to guarantee infrared temperature probe 7 aligning thermometric targets, air draft drifting dust and dispels steam towards measurand one side; Can the steam on the thermometric path, dust be blown away; So that guarantee to collect temperature measurement signal accurately, two cold-zones have been solved because steam, dust influence the difficult problem of thermometric value.
In said casting blank surface temperature measurement and the control method; According to tundish continuous measurement of molten steel temperature signal, casting speed signal, two cold-zone water distribution signals, steel grade, strand cross section signal; Temperature controller 10 calculates each point for measuring temperature (control point) ideal temperature value; When point for measuring temperature (control point) observed temperature was more on the low side than ideal temperature, the processing method of taking to improve casting speed or reducing the water distribution quantity of corresponding region also finally reached ideal temperature so that point for measuring temperature (control point) temperature improves; When point for measuring temperature (control point) temperature was more higher than ideal temperature, the processing method of taking to reduce casting speed or increasing the water distribution quantity of corresponding region also finally reached ideal temperature so that point for measuring temperature (control point) temperature reduces.When molten steel temperature in tundish is high, require the casting speed that keeps lower; If molten steel temperature in tundish is low, then require the casting speed that keeps high.
Said casting blank surface temperature is measured in the temperature measuring equipment that uses, and the distance between the surface of accurate target device 6 and strand 4 is 10-250mm, and the pressure that source of the gas is handled part 9 settings is 0.05～0.4MPa.
The present invention also require to protect said casting blank surface temperature measure with control method at the isolated plant that uses, it is characterized in that: said isolated plant includes following part: infrared temperature probe 7, accurate target device 6, source of the gas processing part 9; Wherein: accurate target device 6 front ends are provided with the tubular structure that is used to dry; Shown in figure (3), figure (4), infrared temperature probe 7 is through facing an other end that cooperates the mode combine with cone match or be installed in accurate target device 6 front end exit through the mode of cone match directly; The gas of handling part 9 through source of the gas gets into accurate target device 6 through infrared temperature probe 7.Infrared temperature probe 7 cooperates the mode combine with cone match or the mode through cone match to be installed on the accurate target device 6 through facing directly, and the tapering of cone match is 1:100 to 1:1, and assurance infrared temperature probe 7 is coaxial with accurate target device.
The gas that source of the gas will be handled after part 9 will be handled is delivered to infrared temperature probe 7 and accurate target device 6.
The isolated plant of casting blank surface temperature measurement according to the invention and control method preferably also requires the following content of protection:
Said casting blank surface temperature measure and the isolated plant of control method in, also be provided with and be used to the hinge bracket 5 that supports and adjust accurate target device 6 positions and link together with it.
Said hinge bracket 5 is friction tight two rod-type articulated structures.One of them rod member is connected with accurate target device 6, and another rod member is connected with base or basic part.
In the isolated plant of said casting blank surface temperature measurement and control method, also be provided with continuous measurement of molten steel temperature appearance 3, temperature controller 10, master computer 11, signal processor 8; Wherein: the temperature-measuring part that is used for measuring the continuous measurement of molten steel temperature appearance 3 of liquid steel temperature is arranged in the steel ladle; The consequential signal that thermometric obtains is delivered in the temperature controller 10 through continuous measurement of molten steel temperature signal transmssion line 12, and temperature controller 10 connects master computer 11 through temperature control computer transmission signal transmssion line 15.
In the isolated plant of said casting blank surface temperature measurement and control method, accurate target device 6 length are 0.5～2 meter, and the distance between accurate target device 6 front end exit and tested strand 4 surfaces is 10-250mm, and the pressure that source of the gas is handled part 9 settings is 0.05～0.4Mpa; Said source of the gas is handled in the part 9 employed and be compressed air or nitrogen or argon gas through infrared temperature probe 7 and accurate target device 6 and from the gas of accurate target device 6 front end tubulose blowing mouths output.
Special instruction about innovative point of the present invention:
1) among the present invention, it is emphasized that: the maximum factor of surface temperature that strand 4 is accurately measured in the influence of said two cold-zones mainly contains: continual suspended solid powder and steam, the interval is present in the moisture film and the iron scale on strand 4 surfaces.
One of technological difficulties of said temp measuring method are to reduce even get rid of the influence to measurement result of continual suspended solid powder and this type of steam factor fully.We are provided with the accurate target device 6 of dustproof anti-vapour for this reason, so that remove suspended solid powder and the steam that between infrared temperature probe 7 and measurand strand 4, exists.
Except that steam and dust influence the thermometric value, moisture film and iron scales that strand 4 surfaces exist also directly influence the thermometric value.Processing method to this factor is: continuously gather the radiation signal that send on strand 4 surfaces through said infrared temperature probe 7; Must be more much lower because strand 4 surface coverage that infrared temperature probe 7 receives the radiation signal at moisture film and iron scale place than there not being lining be covered with the radiation signal at moisture film and iron scale place, signal processor 8 setting-up time at interval in certain frequency to infrared temperature probe 7 collection signals; Requiring signal processor 8 is qualified signal and defective signal with the signal resolution of collecting automatically; The signal Direct Filtration that will be identified as defective (than the obvious much lower signal of normal value) is then fallen; And on signal processor 8, directly show the pairing accurate temperature of other valid data, afterwards temperature signal is passed to temperature controller 10.
Because the thermometric environmental abnormality of two cold-zones is abominable; Amounts of dust, steam, moisture film and iron scale all are the obstacles that influences the thermometric accuracy; At first need use accurate target device 6 in the said temp measuring method, so that continual always dust of eliminating and steam are to the influence of thermometric value.
Exist the moisture film and the iron scale in gap according to strand 4 surfaces, radiation signal must be than the normal low principles of radiation signal in strand 4 surfaces when infrared temperature probe 7 was collected strand 4 and covered by moisture film and iron scale, the collection radiation signal that infrared temperature probe 7 is continuous; Pass to signal processor 8; Signal processor 8 calculates with certain benchmark according to certain hour at interval, can tell qualified signal and defective signal automatically, the underproof temperature measurement signal of automatic fitration; Directly temperature is presented on the signal processor 8 accurately; Signal processor 8 reaction speeds are fast, and are highly sensitive, for correctly showing and regulating and control strand 4 surface temperatures assurance are provided.
2) in engineering practice, after steel grade and strand 4 cross sections were confirmed, two cold-zone casting blank surface temperatures and molten steel temperature in tundish, casting speed, two cold water distribution quantities were directly related.Molten steel temperature in tundish signal, casting speed signal, two cold-zone water distribution signals, two cold-zone casting billet surface continuous temperature measurement signals that tundish continuous measurement of molten steel temperature appearance 3 (the Chinese patent file that with the patent No. is ZL200720013908.1 is the typical application example) provides are introduced temperature controller 10 jointly and analyzed and calculate; Temperature controller 10 has relevant control program; Control casting speed or two cold-zone distributed water flows in view of the above, the metallurgical automation of realizing ideal control system.
3) about the concrete temperature survey and the explanation of control device:
Infrared temperature probe 7 front ends of the infra-red radiation continuous temperature measurement appearance in the 1. said temperature measuring equipment are provided with accurate target device 6, aim at the thermometric target through accurate target device 6, through infrared temperature probe 7 signal of gathering are passed to signal processor 8 again; When gathering signal,, directly cause thermometric inaccurate because two cold-zones exist amounts of dust, steam always; The accurate target device 6 main protective actions that rise are 10-250mm apart from strand 4 surfaces, when outlet is near apart from strand 4 surfaces before the accurate target device 6; It is little that 10mm for example, source of the gas handle the pressure that part 9 sets, for example 0.1Mpa; When outlet was far away apart from strand 4 surfaces before the accurate target device 6, it is big that 250mm for example, source of the gas handle the pressure that part 9 sets; 0.4Mpa for example, purpose is not descend because of blowing causes target temperature.This is our preferred requirement behind overtesting, helps the best techniques effect of implement device.
2. preferably ventilation unit can also be set; Concrete corresponding source of the gas is handled part 9; Source of the gas is handled part 9 and is had functions such as air filtration, pressure control, and the clean air of handling after part 9 is handled through source of the gas at first gets into infrared temperature probe 7, and the effect of being played is: on the one hand infrared temperature probe 7 is cooled off; Form air curtain at infrared temperature probe 7 front ends on the other hand, prevent that steam and dust are to the pollution of infrared temperature probe 7 on every side.Clean air flows out from infrared temperature probe 7 front ends and gets into accurate target device 6 afterwards; Get rid of steam and dust in the accurate target device 6; Flow out from accurate target device 6 outlets at last; Blow away being stored in steam and the dust that accurate target device 6 is exported on the space path between strand 4 surfaces, guaranteed that light path cleans between infrared temperature probe 7 to strand 4 surfaces; Thereby guaranteed certainty of measurement.
3. dispose hinge bracket 5, accurate target device 6 is fixed on the front end of hinge bracket 5.Can arbitrarily adjust hinge bracket 5, convenient accurate target device 6 carries out thermometric in only position.In the time that need slinging roller frame owing to reasons such as changing section, only need hinges support 5 just can realize.
4. signal processor 8 is to the temperature controller that is placed on master-control room 10 outputs 4～20mA (corresponding 700～1500 ℃) signal.
Need to prove in addition:
The control method of two cold-zone water distributions mainly can be divided into instrument control method and automatic control method; Instrument control method is that two cold-zones are divided into plurality of sections; Every section installing electromagnetic flowmeter; According to continuous casting process conditions such as the section of being cast, steel grade, casting speed, the degrees of superheat, calculate cooling water inflow, regulate in proportion through adjuster.When manufacturing condition changes, in time change the setting value of adjuster by manual work, correspondingly change the confluent of each section.This control mode is used for strand 4 kinds and the single conticaster of size more.The control method that in time changes casting speed and secondary cooling water according to two cold-zone casting billet surface actual temperatures automatically is automatic control method.If can accurately record the surface temperature of strand 4, then can in time adjust secondary cooling water or casting speed according to strand 4 surface temperatures.But a large amount of steam and dust that one deck iron scale of strand 4 surface coverage, moisture film and two cold-zones exist have a strong impact on the accuracy of measurement result.Therefore, the method for in actual production, controlling automatically according to strand 4 surface temperatures of actual measurement is difficult to be used.
Said temp measuring method has overcome two cold-zones can't realize the rugged environment factor of control automatically; Accurately measure strand 4 surface temperatures; Automatically control casting speed or two cold water distribution quantities improve strand 4 quality, can when processing parameter is unstable, still can satisfy the production needs.
Introduce tundish continuous measurement of molten steel temperature signal, casting speed signal, two cold-zone water distribution signals, steel grade, strand cross section and one or more strands 4 surperficial continuous temperature measurement signals in the said control method and got into temperature controller 10 simultaneously; The signal of the continuous measurement of molten steel temperature appearance 3 that in tundish, obtains can provide tundish pouring molten steel temperature; Master computer 11 can provide steel grade, casting blank section, casting speed; Data such as two cold-zone water distribution quantities; The casting billet surface thermometric can provide real-time surface temperature data, in temperature controller 10, carries out network analysis according to the various data of input, is lower than the ideal temperature of this point when the control point temperature; If this moment, molten steel temperature in tundish was high; Adopt the method that reduces corresponding region, two cold-zones cooling water inflow to improve the control point temperature,, can adopt the method that improves casting speed to improve the control point temperature if this moment, molten steel temperature in tundish was low.
The ideal temperature that is higher than this point when the control point temperature; If this moment, molten steel temperature in tundish was high; Adopt the method that reduces casting speed to reduce the control point temperature,, can adopt the method that increases corresponding region, two cold-zones cooling water inflow to reduce the control point temperature if this moment, molten steel temperature in tundish was low.Also can adjust casting speed simultaneously and corresponding region, two cold-zones cooling water inflow makes the temperature at control point reach perfect condition.
Molten steel temperature in tundish is the key factor of decision casting speed and two cold-zone water distribution quantities.If lack the molten steel temperature in tundish signal, have only the surface temperature signal of strand 4, just can not realize the control of good casting speed, two cold-zone automatic distribution waters.
The advantage of two cold-zone casting blank surface temperature measurements according to the invention and control method and device: through ventilating to infrared temperature probe 7 and accurate target device 6, can effectively prevent the influence to the thermometric value of steam, dust, its temperature measurement accuracy is high.Designed hinge bracket 5 for fixedly mounting accurate target device 6 especially with infrared temperature probe 7, easy for installation, arbitrarily conversion direction and position.Introduce the surface temperature measured signal of tundish molten steel continuous temperature signal, strand 4; Realize the automatic control of real-time monitoring casting speed and two cold water distributions, be the defective of prevention strand 4, improve the quality of strand 4; Optimization production technology realizes that automation control provides guarantee.
Temperature measurement accuracy when casting blank surface temperature measurement according to the invention and control device use is high, effective; In said casting blank surface temperature measurement and the control method; Breakthroughly in the secondary cooling area for continuous casting PROCESS FOR TREATMENT of carrying out on temperature survey and the basis of introducing other parameter carrying out better effects if according to the requirement of measured data such as temperature and control; Solved a big difficult point of prior art, and obtained more good technical effect considerably beyond prior art.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation:
Fig. 1 is that said casting blank surface temperature is measured and control device application principle sketch map;
Fig. 2 selects sketch map with embodiment 3 corresponding point for measuring temperature (control point) positions;
Fig. 3 for infrared temperature probe 7 through facing accurate target device 6 sketch mapes that cooperate the mode combine with cone match to install directly; A representes to cooperate and faces part directly among Fig. 3, and B representes to cooperate conical surface part;
Fig. 4 is accurate target device 6 sketch mapes of installing through the mode of cone match with infrared temperature probe 7; C representes the cone match part among Fig. 4.
The specific embodiment
Each Reference numeral implication is following: tundish 1, molten steel 2, continuous measurement of molten steel temperature appearance 3, strand 4 (strand 4 can segmentation, specifically referring to accompanying drawing 1, shown in 2), hinge bracket 5, accurate target device 6, infrared temperature probe 7, signal processor 8, source of the gas handle part 9, temperature controller 10 (specifically can be the temperature control computer), master computer 11, continuous measurement of molten steel temperature signal transmssion line 12, casting blank surface temperature signal transmssion line 13, master computer output signal transmission line 14, temperature controller output signal transmission line 15, cutting machine 16.
Embodiment 1
Use the casting blank surface temperature described in the accompanying drawing 1 and measure and control device, in the continuous casting of molten steel process, between secondary cooling zone, carry out casting blank surface temperature and measure and control and handle, to obtain better technique effect.
Described casting blank surface temperature is measured and control method, and it is applied in the continuous casting of molten steel process between secondary cooling zone; Its crucial specification requirement is: in the continuous casting of molten steel process, between secondary cooling zone, (be called for short two cold-zones) strand 4 surface temperatures are measured; Compare according to this point measurement actual temperature and this ideal temperature; When there are deviation in actual temperature and ideal temperature; Through adjustment casting speed or the corresponding cooling of change distributed water flow, eliminate its deviation.
In said casting blank surface temperature measurement and the control method; The concrete grammar of between the secondary cooling zone in the continuous casting of molten steel process surface temperature of strand 4 being measured is: use infrared temperature probe 7 to gather the radiation signal that send on strand 4 surfaces with the noncontact mode; And this signal transition exported to signal processor 8 for the corresponding signal of telecommunication; Signal processor 8 filters out obvious numerical value on the low side in the signal of collecting, and remaining calculates actual temperature as valid data with the valid data process that records; Compare with this temperature and ideal temperature, its deviation is as the foundation of control.
Said casting blank surface temperature is measured in the temperature measuring equipment that uses; Infrared temperature probe 7 is provided with accurate target device 6 towards measurand one side; Its effect is to guarantee infrared temperature probe 7 aligning thermometric targets; And have air draft drifting dust and the function that dispels steam, can the steam on the thermometric path, dust be blown away, so that guarantee to collect temperature measurement signal accurately.Two cold-zones have been solved because steam, dust influence the difficult problem of thermometric value.
Said casting blank surface temperature measure with control method in, according to tundish continuous measurement of molten steel temperature signal, casting speed signal, two cold-zone each section water distribution signals, steel grade, strand cross section and the strand 4 surperficial continuous temperature measurement signals that are directed against one or more; Above-mentioned data as the control foundation, are carried out network analysis,, reasonably regulate and control the related process parameter.
Said casting blank surface temperature is measured in the temperature measuring equipment that uses, and the distance between accurate target device 6 front end exit and strand 4 surfaces is 10-250mm, and the pressure that source of the gas is handled part 9 settings is 0.05～0.4MPa.
Said casting blank surface temperature measurement and control method are at the isolated plant that uses, and its key point is: said isolated plant includes following part: infrared temperature probe 7, accurate target device 6, source of the gas are handled part 9; Wherein: accurate target device 6 front ends are provided with the tubular structure that is used to dry; Infrared temperature probe 7 cooperates the mode combine with cone match or is installed in the opposite end of accurate target device 6 front end exit through the mode of cone match through facing directly, handles that gas after part 9 is handled gets into infrared temperature probe 7 and as the accurate target device 6 of drying with tubular structure through source of the gas.
In the isolated plant of said casting blank surface temperature measurement and control method, also be provided with the hinge bracket 5 that is used to support and adjust accurate target device 6 positions.
Said hinge bracket 5 is friction tight two rod-type articulated structures, and one of them rod member is connected with accurate target device 6, and another rod member is connected with base or basic part.
In the isolated plant of said casting blank surface temperature measurement and control method, also be provided with continuous measurement of molten steel temperature appearance 3, temperature controller 10, master computer 11, signal processor 8; Wherein: the temperature-measuring part that is used for measuring the continuous measurement of molten steel temperature appearance 3 of liquid steel temperature is arranged in the steel ladle; The consequential signal that thermometric obtains is delivered in the temperature controller 10 through continuous measurement of molten steel temperature signal transmssion line 12, and temperature controller 10 connects master computer 11 through temperature control computer transmission signal transmssion line 15.
In the implementation process of present embodiment; During concrete operations, the measurement point of said continuous temperature measurement device is chosen in the I section, hinge bracket 5 holders are welded on the running roller leading truck; Accurate target device 6 is fixed on the front end of hinge bracket 5; Accurate target device 6 length are 1m, and the surface distance of accurate target device 6 forward open end and strand 4 is 30mm, and accurate target device 6 other ends are connected with infrared temperature probe 7.Compressed air is handled part 9 through source of the gas, and pressure is set at 0.25Mpa, and flow is 4.5 m/h.
Embodiment 3
In the present embodiment, basic identical about the content of casting blank surface temperature measurement and control method and isolated plant and embodiment 1, its difference mainly is:
The point for measuring temperature (control point) of said continuous temperature measurement device is chosen in III section, V section, VII section along strand 4 directions of motion; The lateral arrangement center a bit; Apart from 4 liang of corner 20mm of strand respectively a bit, accurate target device 6 length of 9 measurement mechanisms are 1.3m, accurate target device 6 forward open end and strand 4 surface distances: 3 points for measuring temperature of III section are 10mm; 3 points for measuring temperature of V section are 100mm, and 3 points for measuring temperature of VII section are 250mm.III section ventilation pressure is 0.2Mpa, and flow is 3.1m/h, and V section ventilation pressure is set at 0.30Mpa, and flow is 5.3m/h, and VII section ventilation pressure is set at 0.4Mpa, and flow is 9.8m/h.The temperature signal of 9 signal processor 8 each points for measuring temperature of output all is passed to temperature control computer 10; The ideal temperature and the actual measurement temperature that show 9 points for measuring temperature on the screen of temperature control computer 10 respectively; Can pass through master computer 11 automatic or manual control break casting speeds and two cold-zone water distribution quantities, make the temperature of each measurement point on strand 4 surfaces reach perfect condition.
In the present embodiment, basic identical about the content of casting blank surface temperature measurement and control method and isolated plant and embodiment 1, its difference mainly is:
Steel grade is AH36, and the cross section of strand 4 is 1600*180mm, and molten steel temperature in tundish is 1535 ℃, and casting speed is 1.3m/min; 0 section water distribution quantity 1461L/min, I section water distribution quantity 340 L/min, II section water distribution quantity 120 L/min, III section water distribution quantity 98 L/min; IV section water distribution quantity 86 L/min, V section water distribution quantity 73 L/min, VI section water distribution quantity 66 L/min; VII section water distribution quantity 59 L/min, VIII section water distribution quantity 51 L/min, IX section water distribution quantity 43 L/min; Apart from about 15mm place, strand 4 corner, respectively placing a temperature measurer above VII section strand 4 directions of advance, accurate target device 6 is apart from strand 4 surperficial 25mm, and ventilation pressure is 0.15 Mpa; Vent flow is 3.1m/h, and the left side temperature is 888 ℃, and the right side temperature is 885 ℃; Desire improves about 20 ℃ with the temperature at two point for measuring temperature places, and in conjunction with molten steel temperature in tundish and each section water distribution quantity, the raising casting speed is 1.4m/min.After 10 minutes, the left side temperature is 910 ℃, and the right side temperature is 908 ℃, reaches production requirement.
Embodiment 5
In the present embodiment, basic identical about the content of casting blank surface temperature measurement and control method and isolated plant and embodiment 1, its difference mainly is:
Steel grade is Q235b, and the cross section of strand 4 is 2100*250mm, and molten steel temperature in tundish is 1545 ℃, and casting speed is 1.0m/min; 0 section water distribution quantity 1952L/min, I section water distribution quantity 460 L/min, II section water distribution quantity 171 L/min, III section water distribution quantity 132 L/min; IV section water distribution quantity 110 L/min, V section water distribution quantity 100 L/min, VI section water distribution quantity 90 L/min, VII section water distribution quantity 80 L/min; VIII section water distribution quantity 67 L/min, IX section water distribution quantity 55L/min respectively places a temperature measurer at central point above VII section strand 4 directions of advance and apart from about 15mm place, strand 4 corner, and accurate target device 6 is apart from strand 4 surperficial 55mm; Ventilation pressure is 0.3 Mpa, and vent flow is 10.5m/h, and it is 1040 ℃ that central point is measured temperature; The left side temperature is 867 ℃, and the right side temperature is 870 ℃, and desire improves about 40 ℃ with the temperature of VII section corner point for measuring temperature; In conjunction with molten steel temperature in tundish and each section water distribution quantity, casting speed rises to 1.1m/min, and each section water distribution quantity reduces 5%.After 10 minutes, the center temperature is 1080 ℃, and the left side temperature is 905 ℃, and the right side temperature is 909 ℃, reaches production requirement.
In the present embodiment, basic identical about the content of casting blank surface temperature measurement and control method and isolated plant and embodiment 1, its difference mainly is:
Steel grade is PB, and the cross section of strand 4 is 1800*200mm, and molten steel temperature in tundish is 1550 ℃, and casting speed is 1.2m/min; 0 section water distribution quantity 1674/min, I section water distribution quantity 406 L/min, II section water distribution quantity 301 L/min, III section water distribution quantity 211 L/min; IV section water distribution quantity 181 L/min, V section water distribution quantity 131 L/min, VI section water distribution quantity 120 L/min, VII section water distribution quantity 96 L/min; VIII section water distribution quantity 80 L/min, IX section water distribution quantity 73L/min respectively places a temperature measurer at central point above VIII section strand 4 directions of advance and apart from about 15mm place, strand 4 corner, and outlet is apart from strand 4 surperficial 20mm before the accurate target device 6; Ventilation pressure is 0.08 Mpa, and vent flow is 1.6m/h, and it is 1076 ℃ that central point is measured temperature; The left side temperature is 901 ℃, and the right side temperature is 903 ℃, and desire descends the temperature of VIII section corner point for measuring temperature about 20 ℃; In conjunction with molten steel temperature in tundish and each section water distribution quantity, it is constant that casting speed remains 1.2m/min, and each section water distribution quantity increases by 10%.After 10 minutes, the center temperature is 1030 ℃, and the left side temperature is 879 ℃, and the right side temperature is 882 ℃, reaches production requirement.
Infrared temperature probe 7 is in two cold-zone partial fixings on accurate target device 6, and accurate target device 6 is fastened on the hinge bracket 5.Infrared temperature probe 7 is provided with air pipeline; Not having oily anhydrous compressed air or nitrogen or argon gas cools off from the arrival end entering and to it; Also play effect, get into accurate target device 6 after coming out from its port of export, blow away the steam and the dust that influence thermometric infrared temperature probe 7 dustproof and waterproof vapour.The output termination signal processor 8 of infrared temperature probe 7, signal processor 8 other installations are handled part 9 to the source of the gas of air filtration, adjusting pressure, to infrared temperature probe 7 and accurate target device 6 input gases.The output signal of signal processor 8 is passed to temperature control computer 10; When the movement locus of strand 4 passes through temperature measuring equipment; According to the heat radiation philosophy, infrared temperature probe 7 receives strand 4 surfaces and the corresponding radiant energy of temperature through accurate target device 6, changes infrared radiation signal into electrical signal transfer and gives signal processor 8; Signal processor 8 is through filtering and calculating; Can on its display screen, demonstrate strand 4 surface temperatures at once, and convert the 4-20mA standard signal to and pass to temperature control computer 10, temperature control computer 10 is according to strand 4 surperficial each point actual temperatures; Send adjustment casting speed or two cold-zone water distribution signals to master computer 11 or to the operator, so that the surface temperature of strand 4 remains in the ideal range.
Claims (10)
1. casting blank surface temperature is measured and control method, is applied in the continuous casting of molten steel process between secondary cooling zone; It is characterized in that: in the continuous casting of molten steel process, between secondary cooling zone, the surface temperature of strand (4) is measured; Compare according to this point measurement actual temperature and this ideal temperature; When there are deviation in actual temperature and ideal temperature; Through adjustment casting speed or the corresponding cooling of change distributed water flow, eliminate its deviation.
2. measure and control method according to the said casting blank surface temperature of claim 1, it is characterized in that: in said casting blank surface temperature measurement and the control method, the concrete grammar of between the secondary cooling zone in the continuous casting of molten steel process casting blank surface temperature being measured is:
Use infrared temperature probe (7) to gather the radiation signal that send on strand (4) surface with the noncontact mode; And this signal transition exported to signal processor (8) for the corresponding signal of telecommunication; Signal processor (8) filters out obvious numerical value on the low side in the signal of collecting, and remaining is as valid data, through calculating actual temperature; Compare with this temperature value and ideal temperature value, its deviation is as the foundation of control.
3. measure and control method according to the said casting blank surface temperature of claim 2; It is characterized in that: said casting blank surface temperature is measured in the temperature measuring equipment that uses, and infrared temperature probe (7) is provided with the accurate target device (6) that is used to guarantee infrared temperature probe (7) aligning thermometric target, air draft drifting dust and dispels steam towards measurand one side.
4. measure and control method according to one of them said casting blank surface temperature of claim 1-3; It is characterized in that: in said casting blank surface temperature measurement and the control method; According to tundish continuous measurement of molten steel temperature signal, casting speed signal, two cold-zone water distribution signals, steel grade, strand cross section signal, temperature controller (10) is according to each point for measuring temperature ideal temperature value of above-mentioned calculated signals; When the point for measuring temperature observed temperature was more on the low side than ideal temperature, the processing method of taking to improve casting speed or reducing the water distribution quantity of corresponding region also finally reached ideal temperature so that the point for measuring temperature temperature improves; Likewise, when the point for measuring temperature temperature was more higher than ideal temperature, the processing method of taking to reduce casting speed or increasing the water distribution quantity of corresponding region also finally reached ideal temperature so that the point for measuring temperature temperature reduces.
5. measure and control method according to the said casting blank surface temperature of claim 3; It is characterized in that: said casting blank surface temperature is measured in the temperature measuring equipment that uses; Distance between accurate target device (6) front end exit and strand (4) surface is 10-250mm, and it is 0.05～0.4MPa that source of the gas is handled the pressure of setting in the part (9).
6. employed isolated plant in said casting blank surface temperature measurement of claim 1 and the control method is characterized in that: include following part in the said isolated plant: infrared temperature probe (7), accurate target device (6), source of the gas processing part (9); Wherein: accurate target device (6) front end is provided with the tubular structure that is used to dry, and infrared temperature probe (7) is through facing the opposite end that cooperates the mode combine with cone match or be installed in accurate target device (6) front end exit through the mode of cone match directly; The gas of handling part (9) through source of the gas gets into accurate target device (6) through infrared temperature probe (7).
7. measure and control and use device according to the said casting blank surface temperature of claim 6; It is characterized in that: in the isolated plant of said casting blank surface temperature measurement and control method; Infrared temperature probe (7) cooperates the mode combine with cone match or the mode through cone match to be installed on the accurate target device (6) through facing directly, and the tapering of cone match is 1:100 to 1:1.
8. measure and control and use device according to the said casting blank surface temperature of claim 6; It is characterized in that: in the isolated plant of said casting blank surface temperature measurement and control method, also be provided with the hinge bracket (5) that is used for support and adjusts accurate target device (6) position and link together with it;
Said hinge bracket (5) is friction tight two rod-type articulated structures.
9. measure according to the said casting blank surface temperature of claim 8 and the isolated plant of control method; It is characterized in that: in the isolated plant of said casting blank surface temperature measurement and control method, also be provided with continuous measurement of molten steel temperature appearance (3), temperature controller (10), master computer (11), signal processor (8); Wherein: the temperature-measuring part that is used for measuring the continuous measurement of molten steel temperature appearance (3) of liquid steel temperature is arranged in the steel ladle; The consequential signal that thermometric obtains is delivered in the temperature controller (10) through continuous measurement of molten steel temperature signal transmssion line (12), and temperature controller (10) connects master computer (11) through temperature control computer transmission signal transmssion line (15).
10. measure according to the said casting blank surface temperature of claim 9 and the isolated plant of control method; It is characterized in that: in the isolated plant of said casting blank surface temperature measurement and control method; Accurate target device (6) length is 0.5～2 meter; Distance between accurate target device (6) front end exit and tested strand (4) surface is 10-250mm, and it is 0.05～0.4MPa that source of the gas is handled the pressure of setting in the part (9);
Gas employed and that export through infrared temperature probe (7), accurate target device (6) front end tubulose blowing mouth is compressed air or nitrogen or argon gas in the said source of the gas processing part (9).
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102847726A (en) * | 2012-09-19 | 2013-01-02 | 南京钢铁股份有限公司 | Wire temperature detection method for water cooling line |
| CN103382522A (en) * | 2013-07-01 | 2013-11-06 | 中钢集团邢台机械轧辊有限公司 | Method used for controlling roller rotary spray quenching technology |
| CN104062030A (en) * | 2014-06-16 | 2014-09-24 | 北京首钢股份有限公司 | Device and method for measuring surface temperature of plate blank online |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0036342B1 (en) * | 1980-03-13 | 1984-02-15 | FIVES-CAIL BABCOCK, Société anonyme | Process for controlling the cooling of an ingot in a continuous-casting plant |
| CN1410189A (en) * | 2001-09-24 | 2003-04-16 | 北京科技大学 | Accurate measuring method of casted blank surface temperature of continuous casting secondary cold region |
| CN200991711Y (en) * | 2006-12-28 | 2007-12-19 | 中冶南方工程技术有限公司 | Band-steel temperature-measuring apparatus of hot rolling lamina flow cooling system |
| CN101406940A (en) * | 2008-11-14 | 2009-04-15 | 重庆大学 | On-line control method of continuous casting blank temperature based on memory recognition mode |
| CN101441119A (en) * | 2008-12-03 | 2009-05-27 | 重庆大学 | High temperature solid surface long term accurate temperature measuring system in complicated environment |
| CN101592522A (en) * | 2009-06-25 | 2009-12-02 | 浙江大学 | A kind of billet temperature measuring device based on temperature compensation |
| CN101664794A (en) * | 2009-09-16 | 2010-03-10 | 重庆大学 | Continuous casting two cold closed chamber casting blank surface temperature field measuring device |
| JP2010110813A (en) * | 2008-11-10 | 2010-05-20 | Nippon Steel Corp | Secondary cooling method and apparatus for continuously cast slab |
| CN101844215A (en) * | 2009-03-27 | 2010-09-29 | 宝山钢铁股份有限公司 | Dynamic secondary cooling control method for slab continuous casting based on double-cooling mode |
| CN201644739U (en) * | 2010-02-22 | 2010-11-24 | 河北钢铁股份有限公司邯郸分公司 | Casting blank surface water vapor blower for infrared temperature measurement |
| CN101905293A (en) * | 2010-05-31 | 2010-12-08 | 北京科技大学 | High-temperature slab imaging temperature detecting system in secondary cooling zone of continuous casting machine and temperature detecting method thereof |
-
2011
- 2011-02-12 CN CN201110036914XA patent/CN102632213A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0036342B1 (en) * | 1980-03-13 | 1984-02-15 | FIVES-CAIL BABCOCK, Société anonyme | Process for controlling the cooling of an ingot in a continuous-casting plant |
| CN1410189A (en) * | 2001-09-24 | 2003-04-16 | 北京科技大学 | Accurate measuring method of casted blank surface temperature of continuous casting secondary cold region |
| CN200991711Y (en) * | 2006-12-28 | 2007-12-19 | 中冶南方工程技术有限公司 | Band-steel temperature-measuring apparatus of hot rolling lamina flow cooling system |
| JP2010110813A (en) * | 2008-11-10 | 2010-05-20 | Nippon Steel Corp | Secondary cooling method and apparatus for continuously cast slab |
| CN101406940A (en) * | 2008-11-14 | 2009-04-15 | 重庆大学 | On-line control method of continuous casting blank temperature based on memory recognition mode |
| CN101441119A (en) * | 2008-12-03 | 2009-05-27 | 重庆大学 | High temperature solid surface long term accurate temperature measuring system in complicated environment |
| CN101844215A (en) * | 2009-03-27 | 2010-09-29 | 宝山钢铁股份有限公司 | Dynamic secondary cooling control method for slab continuous casting based on double-cooling mode |
| CN101592522A (en) * | 2009-06-25 | 2009-12-02 | 浙江大学 | A kind of billet temperature measuring device based on temperature compensation |
| CN101664794A (en) * | 2009-09-16 | 2010-03-10 | 重庆大学 | Continuous casting two cold closed chamber casting blank surface temperature field measuring device |
| CN201644739U (en) * | 2010-02-22 | 2010-11-24 | 河北钢铁股份有限公司邯郸分公司 | Casting blank surface water vapor blower for infrared temperature measurement |
| CN101905293A (en) * | 2010-05-31 | 2010-12-08 | 北京科技大学 | High-temperature slab imaging temperature detecting system in secondary cooling zone of continuous casting machine and temperature detecting method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102847726A (en) * | 2012-09-19 | 2013-01-02 | 南京钢铁股份有限公司 | Wire temperature detection method for water cooling line |
| CN103382522A (en) * | 2013-07-01 | 2013-11-06 | 中钢集团邢台机械轧辊有限公司 | Method used for controlling roller rotary spray quenching technology |
| CN104062030A (en) * | 2014-06-16 | 2014-09-24 | 北京首钢股份有限公司 | Device and method for measuring surface temperature of plate blank online |
| CN106734202A (en) * | 2016-12-27 | 2017-05-31 | 中冶连铸技术工程有限责任公司 | Bar Wire Product and arrowband rolling line and its production method |
| CN110125359A (en) * | 2019-06-10 | 2019-08-16 | 中冶赛迪技术研究中心有限公司 | A kind of control method and system of the continuous casting secondary cooling water reducing continuous casting billet head and tail temperature difference |
| CN111238650A (en) * | 2020-03-11 | 2020-06-05 | 中南大学 | Blast furnace molten iron temperature measurement method and system based on special infrared spectrum |
| CN114619009A (en) * | 2022-03-23 | 2022-06-14 | 重庆钢铁股份有限公司 | Detection processing method for slab continuous casting secondary cooling water abnormity |
| CN114619009B (en) * | 2022-03-23 | 2023-09-19 | 重庆钢铁股份有限公司 | Detection processing method for abnormality of secondary cooling water in slab continuous casting |
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