CN104894362A - Method for setting temperature of heating furnace in cold and hot steel billet mixed loading - Google Patents
Method for setting temperature of heating furnace in cold and hot steel billet mixed loading Download PDFInfo
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- CN104894362A CN104894362A CN201510264736.4A CN201510264736A CN104894362A CN 104894362 A CN104894362 A CN 104894362A CN 201510264736 A CN201510264736 A CN 201510264736A CN 104894362 A CN104894362 A CN 104894362A
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Abstract
The invention discloses a method for setting the temperature of a heating furnace in cold and hot steel billet mixed loading. According to the method, temperature numerical values of charging steel billets are detected via a thermometric indicator, and the positions of the charging steel billets in the furnace are tracked via a steel billet position recording module,; according to the size of a combustion chamber of the heating furnace, the position of a heating segment, located in the heating furnace, of each steel billet is determined; and the charging temperature mean value of all steel billets in a certain heating segment is calculated, then, a steel tapping temperature numerical value is obtained via a steel tapping temperature calculation module, and therefore, setting of the furnace temperatures of the heating segments is jointly compensated, so that in the cold and hot steel billet mixed loading process, setting of the furnace temperatures of all heating segments is optimized so as to stabilize the steel tapping temperature.
Description
Technical field
The present invention relates to Heating Furnace Control technical field, particularly relate to the furnace temperature of heating furnace establishing method that a kind of cold and hot steel billet loads in mixture.
Background technology
Process furnace is one of main production equipments of steel rolling industry, is in the next process of slab caster, a upper procedure of milling train, and the steel billet sent here by slab caster through the heating of process furnace, then is given milling train and is rolled.Process furnace according to steel billet enter furnace parameters production status and technic index, by controlling furnace temperature, air fuel flow and air-fuel ratio, air fuel pressure, oxygen concentration of flue gas and furnace pressure, make as much as possible steel billet in stove thermally equivalent, reach the rolling temperature of processing requirement when coming out of the stove.The stove steel billet kind that enters of process furnace is divided into complete cold steel, complete hot steel, cold and hotly loads in mixture three types, the exception of producing due to slab caster and the continuity of process furnace and milling train work, the entering stove steel billet and can not satisfy the demand, so current each steel mill is in the cold and hot state loaded in mixture substantially of complete hot steel.Due to the ununiformity of cold and hot slab, require again the stable of tapping temperature, this just has higher requirement to each section of furnace temperature setting of process furnace.The Control for Kiln Temperature of enterprise of current most of steel mill is Non-follow control substantially, and the setting of furnace temperature is also by virtue of experience think setting, subjective.
The model of the furnace plate blank heating cycle of a kind of optimal control large-scale walking beam type of the patent of invention of being applied for by Capital Iron & Steel General Co, adopt heating steel billet system Optimized model, optimize different steel grade steel billet and enter stove order, optimize heating steel billet time and each section of temperature, the change of precognition heating steel billet process temperature, to avoid billet heating temperature too high, reduces billet oxidization burning loss, be conducive to regulating furnace operation parameter scientifically and rationally, meet heating steel billet specification of quality.
The furnace temperature of heating furnace optimal setting model that Northeastern University's automation research center was delivered in July, 2000 in the automatization journal fourth phase, is undertaken combining the conditioned space constructing process furnace by steel billet kind, specification, charging temperature and rolling rhythm.And be known and fixing to the charging temperature of specific process furnace steel billet, the parameter therefore on working point is only the kind of steel billet, specification and rolling rhythm.According to the quasi-steady operation point that these three input parameters are determined, complete initial furnace temperature by precomputation model to set, and result is acted on heat-processed, under making process be in quasi-operating status, when having deviation between the anticipation input parameter and actual input parameter of heat-processed, enable feed forward models to compensate this deviation, when feed forward models is inaccurate or system there is other immeasurable disturbance, larger error can be brought for a heat-processed, feedback model is now adopted to revise this deviation, to realize the closed-loop control of a heat-processed, simultaneously, after each rough rolling of steel billets completes, steel billet temperature forecast correction model completes the correction to steel billet temperature forecasting model, to realize the closed-loop control of whole heat-processed.
Process furnace rhythm of production carries out according to the rhythm of milling train, optimizes process furnace and can have an impact to the rolling rhythm of milling train heat-up time, and then can affect output.Meanwhile, optimize different steel grade to enter after stove order can cause mill milling to sort difficulty.When entering the change of stove steel billet temperature, change two heating zone Control for Kiln Temperature, when two heating zone Control for Kiln Temperature can not regulate, a heating zone Control for Kiln Temperature will work, and heat gradient can be caused thus to become large, affect the homogeneous heating of steel billet.
Prior art cannot be stablized and improve furnace temperature of heating furnace further under existence conditions, and therefore the present invention proposes the furnace temperature of heating furnace establishing method that a kind of cold and hot steel billet loads in mixture.
Summary of the invention
For the problems referred to above, the object of this invention is to provide the furnace temperature of heating furnace establishing method that a kind of cold and hot steel billet loads in mixture, the method detects into stove steel billet temperature numerical value by temperature instrumentation, and be tracked into the position of stove steel billet in stove by steel billet position logging modle, according to process furnace size of burner hearth, determine the heating zone position of process furnace residing for each steel billet, by calculating the charging temperature average of all steel billets in a certain heating zone, and obtain tapping temperature numerical value by tapping temperature computing module, the furnace temperature setting of common compensation heating zone, to optimize the setting of each heating zone furnace temperature when cold and hot steel billet loads in mixture and to stablize tapping temperature.
For achieving the above object, the present invention takes following technical scheme: the furnace temperature of heating furnace establishing method that a kind of cold and hot steel billet loads in mixture, and includes stove steel temperature counter, steel billet tapping register, steel billet position recorder, segmentation enter stove steel temperature average calculator, steel temperature of coming out of the stove counter, enters stove steel temperature loop expansion pipe, steel temperature of coming out of the stove loop expansion pipe, rhythm of production loop expansion pipe and fire box temperature setting apparatus.Entering stove steel temperature counter is adopt temperature measuring equipment to carry out sampling thermometric to obtain the charging temperature average of this steel billet to steel billet; Steel billet tapping register is by tapping temperature and tapping time, obtains tapping steel billet quantity; Steel billet position recorder carries out statistical computation to steel billet charging temperature average and steel billet position; Segmentation enters stove steel temperature average calculator and obtains steel billet temperature average in heating zone and soaking zone respectively; Steel temperature of coming out of the stove counter adopts temperature measuring equipment to carry out sampling thermometric to obtain the tapping temperature average of this steel billet to steel billet; Enter stove steel temperature loop expansion pipe be according to the real-time average of steel billet temperature of heating zone and soaking zone with conventional enter the deviation of stove steel temperature average calculate the compensation rate that fire box temperature sets; Rhythm of production loop expansion pipe calculates according to heating zone and the real-time rhythm of production of soaking zone and the deviation of conventional rhythm of production the compensation rate that fire box temperature sets; Steel temperature of coming out of the stove loop expansion pipe is the compensation rate according to steel temperature mean value computation fire box temperature setting of coming out of the stove; Fire box temperature setting apparatus according to fire box temperature basic settings value, enter stove steel temperature loop expansion pipe, come out of the stove steel temperature loop expansion pipe and rhythm of production loop expansion pipe, realize the setting of fire box temperature.
The present invention is owing to adopting above technical scheme, and it has the following advantages: 1, according to the difference entering stove steel billet temperature, automatically the desired temperature of each heating zone of adjustment, to ensure the stable of steel temperature of coming out of the stove; 2, the change of rhythm of production can effectively be overcome on the impact of steel billet temperature in heating-furnace, to ensure the stable of steel temperature of coming out of the stove.
Accompanying drawing explanation
Accompanying drawing is the furnace temperature of heating furnace establishing method block diagram that a kind of cold and hot steel billet loads in mixture.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Process furnace furnace superintendent 20000mm, heating billet bloom size 150mm*150mm*12000mm, in stove, steel billet quantity is 64.
Enter stove steel temperature counter
By the method for sampling, mean value computation is carried out to the steel billet temperature through temperature measuring equipment.Sampling period is t1, and sample temperature is T_i, and every root steel billet number of samples is n, then enter stove steel temperature average to be
T_ enters steel=∑ T_i/n, and wherein i is 1,2 ..., n.
Steel billet tapping register
By tapping temperature and tapping Time Calculation tapping steel billet quantity, wherein, whether tapping is complete is judged by steel billet number change of coming out of the stove.Steel billet is that t_ taps the time through the setting-up time of temperature measuring equipment, and temperature measuring equipment zero threshold value is 700 DEG C, and tapping number is N_ steel billet quantity, and the steel billet temperature of warm measurement equipment is T_ tapping, and steel billet is t_ tapping through the real time of temperature measuring equipment
IF T_ tapping <700 and t_ tapping >t_ tapping time THEN
N_ steel billet quantity=N_ steel billet quantity+1
ENDIF。
Steel billet position recorder
This process furnace is totally 64 steel billet positions, and every root steel billet position and temperature are designated as GP (i, Ti), and wherein i is 1,2 ..., 64; After a steel billet completes and comes out of the stove, then
GP(64，T64)= GP(63，T63)
GP(63，T63)= GP(62，T62)
……
GP(2，T2)= GP(1，T1)
T1=T_ enters steel.
Segmentation enters stove steel temperature average calculator
Process furnace comprises heating zone and soaking zone, and the heating zone steel billet quantity of this process furnace is 34, and soaking zone steel billet quantity is 30, then the real-time average of heating zone steel billet temperature is
T_ heating zone=∑ GP (i, Ti)/34, wherein i is 1,2 ..., 34;
The real-time average of soaking pit section steel billet temperature is
T_ soaking zone=∑ GP (i, Ti)/30, wherein i is 35,36 ..., 64.
Tapping temperature counter
By the method for sampling, mean value computation is carried out to the steel billet temperature through temperature measuring equipment.Sampling period is t2, and sample temperature is T_i, and every root steel billet number of samples is m, then steel temperature of coming out of the stove average is
T_ tapping=∑ T_i/m, wherein i is 1,2 ..., m.
Enter stove steel temperature loop expansion pipe
The real-time average of steel billet temperature of heating zone and equal forge hot enters the deviation of stove steel temperature average respectively with routine, calculate fire box temperature setting compensation amount △ T heating zone in real time and enter steel and △ T soaking zone by entering stove steel temperature loop expansion pipe and enter steel and be respectively
△ T heating zone enters steel=(T_ heating zone-T_ routine enters steel) * α
△ T soaking zone enters steel=(T_ soaking zone-T_ routine enters steel) * β
Wherein, it is that T_ routine enters steel that routine enters stove steel temperature average, and α, β are respectively heating zone and soaking zone enters stove steel temperature penalty coefficient, gets α=0.2, β=0.1.
Rhythm of production loop expansion pipe
Rhythm of production (V) is the amount characterizing tapping interval, unit is " second/root ", namely from certain root steel billet from entering stove until time cumulation T (i) of coming out of the stove, as i<64, T (i) is accumulation interval, as i=64, T (i)=T (i-1), then
V=T (i)/64, wherein i is 1,2 ..., 64.
The deviation of real-time rhythm of production V and conventional rhythm of production V0, calculates fire box temperature setting compensation amount △ T heating zone rhythm in real time by rhythm of production loop expansion pipe and △ T soaking zone rhythm is respectively
△ T heating zone rhythm=(V-V0) * α 1
△ T soaking zone rhythm=(V-V0) * β 1
Wherein, α 1, β 1 is respectively the rhythm of production penalty coefficient of heating zone and soaking zone, gets α 1=0.4, β 1=0.3.
Steel temperature of coming out of the stove loop expansion pipe
Steel temperature of coming out of the stove average T_ tapping calculates the tapping of fire box temperature setting compensation amount △ T heating zone in real time by steel temperature loop expansion pipe of coming out of the stove and the tapping of △ T soaking zone is respectively
△ T heating zone tapping=T_ tapping * α 2
△ T soaking zone tapping=T_ tapping * β 2
Wherein, α 2, β 2 is respectively the tapping temperature penalty coefficient of heating zone and soaking zone, gets α 2=0.3, β 2=0.2.
Fire box temperature setting apparatus
Fire box temperature setting apparatus realizes the setting of each heating zone fire box temperature set(ting)value, and the fire box temperature set(ting)value of heating zone and soaking zone is respectively
Basic+△ T the heating zone of T_ heating zone setting=T_ heating zone enters the tapping of steel+△ T heating zone rhythm+△ T heating zone
Basic+△ T the soaking zone of T_ soaking zone setting=T_ soaking zone enters the tapping of steel+△ T soaking zone rhythm+△ T soaking zone
Wherein, T_ heating zone fundamental sum T_ soaking zone is respectively the fire box temperature basic settings value of heating zone and soaking zone substantially.
Claims (1)
1. the furnace temperature of heating furnace establishing method that loads in mixture of cold and hot steel billet, is characterized in that: include stove steel temperature counter, steel billet tapping register, steel billet position recorder, segmentation enter stove steel temperature average calculator, steel temperature of coming out of the stove counter, enter stove steel temperature loop expansion pipe, steel temperature of coming out of the stove loop expansion pipe, rhythm of production loop expansion pipe and fire box temperature setting apparatus;
Described enter stove steel temperature counter be adopt temperature measuring equipment to steel billet carry out sampling thermometric to obtain the charging temperature average of this steel billet;
Described steel billet tapping register is by tapping temperature and tapping time, obtains tapping steel billet quantity;
Described steel billet position recorder carries out statistical computation to steel billet charging temperature average and steel billet position;
Described segmentation enters stove steel temperature average calculator and obtains steel billet temperature average in heating zone and soaking zone respectively;
Described steel temperature counter of coming out of the stove adopts temperature measuring equipment to carry out sampling thermometric to obtain the tapping temperature average of this steel billet to steel billet;
Described enter stove steel temperature loop expansion pipe be according to the real-time average of steel billet temperature of heating zone and soaking zone with conventional enter the deviation of stove steel temperature average calculate the compensation rate that fire box temperature sets;
Described rhythm of production loop expansion pipe calculates according to heating zone and the real-time rhythm of production of soaking zone and the deviation of conventional rhythm of production the compensation rate that fire box temperature sets;
Described steel temperature loop expansion pipe of coming out of the stove is the compensation rate according to steel temperature mean value computation fire box temperature setting of coming out of the stove;
Described fire box temperature setting apparatus according to fire box temperature basic settings value, described in enter stove steel temperature loop expansion pipe export, described in come out of the stove steel temperature loop expansion pipe export and described rhythm of production loop expansion pipe output, realize the setting of fire box temperature.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106521110A (en) * | 2016-11-07 | 2017-03-22 | 北京首钢股份有限公司 | Annealing furnace combustion control method and device |
| CN106906352A (en) * | 2017-03-30 | 2017-06-30 | 重庆赛迪热工环保工程技术有限公司 | A kind of heating means when heater for rolling steel steel billet is loaded in mixture |
| CN107151727A (en) * | 2017-04-21 | 2017-09-12 | 上海联达节能科技有限公司 | A kind of furnace temperature of heating furnace establishing method under change rhythm of production |
| CN108722732A (en) * | 2018-07-12 | 2018-11-02 | 江苏常宝普莱森钢管有限公司 | A kind of process and its device spraying lubricant to plug |
| CN106987704B (en) * | 2016-01-20 | 2019-04-23 | 宝山钢铁股份有限公司 | A kind of cold and hot process temperature control method for loading in mixture slab of pulse type heating furnace |
| CN110184444A (en) * | 2019-07-05 | 2019-08-30 | 安徽工业大学 | A kind of furnace trial device |
| CN110617716A (en) * | 2018-06-19 | 2019-12-27 | 宝山钢铁股份有限公司 | Method for controlling production rhythm and furnace temperature of mixed steel heating on line |
| CN111814402A (en) * | 2020-07-13 | 2020-10-23 | 重庆赛迪热工环保工程技术有限公司 | Heating furnace temperature control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106987704B (en) * | 2016-01-20 | 2019-04-23 | 宝山钢铁股份有限公司 | A kind of cold and hot process temperature control method for loading in mixture slab of pulse type heating furnace |
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| CN110617716A (en) * | 2018-06-19 | 2019-12-27 | 宝山钢铁股份有限公司 | Method for controlling production rhythm and furnace temperature of mixed steel heating on line |
| CN108722732A (en) * | 2018-07-12 | 2018-11-02 | 江苏常宝普莱森钢管有限公司 | A kind of process and its device spraying lubricant to plug |
| CN110184444A (en) * | 2019-07-05 | 2019-08-30 | 安徽工业大学 | A kind of furnace trial device |
| CN110184444B (en) * | 2019-07-05 | 2024-02-27 | 安徽工业大学 | Heating furnace test device |
| CN111814402A (en) * | 2020-07-13 | 2020-10-23 | 重庆赛迪热工环保工程技术有限公司 | Heating furnace temperature control method |
| CN111814402B (en) * | 2020-07-13 | 2023-10-17 | 重庆赛迪热工环保工程技术有限公司 | Heating furnace temperature control method |
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Application publication date: 20150909 |