CN105734263B - A kind of method of follow-up steel billet temperature and furnace temp in prediction heating furnace - Google Patents

A kind of method of follow-up steel billet temperature and furnace temp in prediction heating furnace Download PDF

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Publication number
CN105734263B
CN105734263B CN201610127123.0A CN201610127123A CN105734263B CN 105734263 B CN105734263 B CN 105734263B CN 201610127123 A CN201610127123 A CN 201610127123A CN 105734263 B CN105734263 B CN 105734263B
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temperature
steel billet
furnace
heating
steel
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CN105734263A (en
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魏福顺
袁秉文
王泽举
刘木刚
陈永平
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Shougang Jingtang United Iron and Steel Co Ltd
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Shougang Jingtang United Iron and Steel Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/70—Furnaces for ingots, i.e. soaking pits
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
    • G16Z99/00—Subject matter not provided for in other main groups of this subclass

Abstract

The invention discloses a kind of method for predicting follow-up steel billet temperature and furnace temp in heating furnace, belong to plate and strip rolling technology field.The method of follow-up steel billet temperature and furnace temp comprises the following steps in present invention prediction heating furnace：Establish slab heating-up Coefficient Concept and set up slab heating-up factor alphafmFormula；Count different steel billet temperatures and under heating-furnace temperature difference, the elevated data of steel billet temperature, draw slab heating-up factor alphafm；According to obtained slab heating-up factor alphafmThe temperature that the temperature and heating furnace needs that steel billet needs in heating furnace reach reach.The method of follow-up steel billet temperature and furnace temp can need the temperature reached with the follow-up steel billet of Extrapolation in the prediction heating furnace, can also Extrapolation go out furnace temperature of heating furnace when reaching the steel billet temperature, solves the problems, such as the superheated during heating steel billet, also insulation cooling extent to be rolled and temperature raising moment are solved the problems, such as, waste of fuel is reduced and reduces scaling loss amount.

Description

A kind of method of follow-up steel billet temperature and furnace temp in prediction heating furnace
Technical field
The present invention relates to plate and strip rolling technology field, follow-up steel billet temperature and heating in more particularly to a kind of prediction heating furnace The method of furnace temperature.
Background technology
Equipment of Hot Strip Mill heating furnace, generally calculates steel billet temperature, steel using Steel In Reheating Furnace base temperature mathematical model Then the accuracy that base temperature model calculates calculates deviation, correction by even buried experimental verification according to experimental result correction model Model calculates the deviation of steel temperature, the accuracy of the calculating temperature of enhancing.But in the prior art, heated in heater for rolling steel During steel billet, how to control billet heating temperature arrival to come out of the stove and meet milling train requirement constantly, and do not produce the mistake of heating process Heating problems are spent, waste of fuel and scaling loss are reduced so as to reach, this problem is to perplex the problem of steel rolling heating specialty.
The content of the invention
The present invention provides a kind of method for predicting follow-up steel billet temperature and furnace temp in heating furnace, solves or part Solving cannot control billet heating temperature arrival to come out of the stove in the prior art meets milling train requirement constantly, and does not produce heating process Superheated technical problem.
In order to solve the above technical problems, the present invention provides follow-up steel billet temperature and heating furnace temperature in one kind prediction heating furnace The method of degree comprises the following steps：Establish slab heating-up Coefficient Concept and set up slab heating-up factor alphafmFormula, the steel billet liter Warm factor alphafmRefer under furnace temperature and 1 DEG C of temperature difference of steel temperature, model per minute calculates the elevated numerical value of steel billet temperature, describedX raises numerical value for steel billet temperature per minute, and Y is furnace temperature, and Z is steel billet temperature；Different steel billet temperatures are counted with adding Under hot stove furnace temperature difference, the elevated data of steel billet temperature, according to the elevated data of the steel billet temperature of statistics, bring steel billet liter into Warm factor alphafmFormula, draws slab heating-up factor alphafm；According to obtained slab heating-up factor alphafmDerive the steel in heating furnace The temperature that the temperature and heating furnace needs that base needs reach reach.
Further, the slab heating-up factor alpha that the basis obtainsfmSteel billet in heating furnace needs the temperature reached The temperature for needing to reach with heating furnace includes：Obtain the difference of furnace temp and steel billet temperature；According to the furnace temp Heating furnace maximum temperature is obtained with the difference of steel billet temperature；Determined according to the difference for obtaining furnace temp and steel billet temperature Steel billet enters the minimum temperature of next control section.
Further, the furnace temp and the difference of steel billet temperature of obtaining includes：The maximum allowable furnace temperature and steel The temperature difference=(heating furnace maximum permissible temperature-steel billet target temperature) * 80%.
Further, maximum allowable furnace temperature and the steel temperature difference of obtaining utilizes 2:The principle of 8 rules：The temperature difference is using maximum temperature 80% or so of difference, leaves 20% adjusting surplus.
Further, the heating furnace maximum temperature includes：The highest furnace temp=steel billet target temperature+maximum Allow furnace temperature and the steel temperature difference.
Further, the lowest temperature of the steel billet into next control section includes：The steel billet enters next control section Minimum temperature=steel billet target temperature-αfm* time * maximum allowable furnace temperature and the steel temperature difference of the steel billet at next section.
The method of follow-up steel billet temperature and furnace temp is by establishing steel billet liter in prediction heating furnace provided by the invention Warm Coefficient Concept sets up slab heating-up factor alphafmFormula, described to refer under furnace temperature and 1 DEG C of temperature difference of steel temperature, model calculating per minute The elevated numerical value of steel billet temperature, it is describedX raises numerical value for steel billet temperature per minute, and Y is furnace temperature, and Z is steel billet temperature Degree；Count under different steel billet temperatures and heating-furnace temperature difference, the elevated data of steel billet temperature, according to the steel billet temperature of statistics Elevated data are spent, bring α intofm(slab heating-up coefficient) formula, draws αfmSlab heating-up coefficient；According to obtained αfm(steel billet liter Warm coefficient) steel billet in the heating furnace needs the temperature that reaches and heating furnace needs reach temperature, can be with Extrapolation after Continuous steel billet needs the temperature reached, can also Extrapolation go out furnace temperature of heating furnace when reaching the steel billet temperature, solve steel Superheated problem in base heating process, also solves the problems, such as insulation cooling extent to be rolled and temperature raising moment, reduces fuel Waste and reduce scaling loss amount.
Brief description of the drawings
Fig. 1 is the stream of the method for follow-up steel billet temperature and furnace temp in prediction heating furnace provided in an embodiment of the present invention Journey schematic diagram.
Embodiment
Referring to Fig. 1, follow-up steel billet temperature and furnace temp in a kind of prediction heating furnace provided in an embodiment of the present invention Method, it is characterised in that comprise the following steps：
Step 1, establish slab heating-up Coefficient Concept and set up slab heating-up factor alphafmFormula, the slab heating-up coefficient αfmRefer under furnace temperature and 1 DEG C of temperature difference of steel temperature, model per minute calculates the elevated numerical value of steel billet temperature, describedX is Steel billet temperature per minute raises numerical value, and Y is furnace temperature, and Z is steel billet temperature.
Step 2, count under different steel billet temperatures and heating-furnace temperature difference, the elevated data of steel billet temperature, according to statistics The elevated data of the steel billet temperature, bring slab heating-up factor alpha intofmFormula, draws slab heating-up factor alphafm。
Step 3, according to obtained slab heating-up factor alphafmDerive the steel billet in the heating furnace need the temperature that reaches and Heating furnace needs the temperature reached.
Step 3 is discussed in detail.
The slab heating-up factor alpha that the basis obtainsfmSteel billet of the derivation in heating furnace needs the temperature reached and adds The temperature that hot stove needs to reach includes：
Obtain the difference of furnace temp and steel billet temperature.The maximum allowable furnace temperature and the steel temperature difference=(heating furnace highest Allow temperature-steel billet target temperature) * 80%.Maximum allowable furnace temperature and the steel temperature difference of obtaining utilizes 2:The principle of 8 rules：Temperature Difference uses 80% or so of maximum temperature difference, leaves 20% adjusting surplus, leaves the space of technique change.
Heating furnace maximum temperature is obtained according to the difference of the furnace temp and steel billet temperature.The highest heats furnace temperature Degree=steel billet target temperature+maximum allowable furnace temperature and the steel temperature difference.
Determine that steel billet enters the lowest temperature of next control section according to the difference for obtaining furnace temp and steel billet temperature Degree.The steel billet enters minimum temperature=steel billet target temperature-α of next control sectionfm* steel billet is maximum in next section of time * Allow furnace temperature and the steel temperature difference.
In order to become apparent from introducing the embodiment of the present invention, introduced below from the application method of the embodiment of the present invention.
Establish slab heating-up Coefficient Concept and set up slab heating-up factor alphafmFormula, the slab heating-up factor alphafmRefer to Under furnace temperature and 1 DEG C of temperature difference of steel temperature, model per minute calculates the elevated numerical value of steel billet temperature, describedX is per minute Steel billet temperature raises numerical value, and Y is furnace temperature, and Z is steel billet temperature.
Count under different steel billet temperatures and heating-furnace temperature difference, the elevated data of steel billet temperature；Example：The steel billet of statistics exists Different furnace temperature and the heating data under steel billet temperature difference, referring to form 1；
Slab heating-up (DEG C/min) 1.5 3 5 6 7 8
Furnace temperature and the steel temperature difference (DEG C/min) 50 100 150 200 250 300
Heating data of 1 steel billet of table under different furnace temperature and steel billet temperature difference
Using statistics, α is brought intofm(slab heating-up coefficient) formula, draws αfmSlab heating-up coefficient；αfm=30.5/ 1050=0.029048.
Utilize αfm(slab heating-up coefficient) is derived needs the temperature and the heating that reach positioned at some position of heating furnace steel billet Stove needs the temperature reached.
Example：In four-part form heating furnace, if tapping temperature is 1210 DEG C of steel billet, also have to tap within 34 minutes, advise The highest furnace temperature for determining heating furnace permission is 1320 DEG C, please make minimum temperature and soaking zone needs when steel billet enters soaking zone The furnace temperature reached.
1. known αfm=0.029048；
2. determine that the steel billet temperature of permission and furnace temperature are poor；
Maximum allowable furnace temperature and -1210 DEG C of the steel temperature difference=1320 DEG C=110 DEG C
Utilize 2:The principle of 8 rules：The temperature difference uses the 80% of maximum temperature difference, it is therefore an objective to leaves 20% adjusting surplus, stays There is the space of technique change.
Determine the furnace temperature and the steel temperature temperature difference actually performed：Determine that the temperature difference uses 80 DEG C in implementation procedure
+ 80 DEG C of furnace temperature=1210 DEG C=1290 DEG C at this time
3. determine that steel billet enters the minimum steel billet temperature of soaking zone；
Into -0.029048*80 DEG C * 34 minutes=1131 DEG C of minimum steel billet temperature=1210 DEG C of soaking zone.
Conclusion：Pass through above step, it is determined that 1290 DEG C of furnace temperature and 1131 DEG C of steel billet temperature for entering soaking zone.I.e. at this Under furnace temperature, when reaching 1131 DEG C into the steel billet temperature of soaking, steel billet can reach 1210 to moment temperature of coming out of the stove after 34 minutes ℃.According to obtained αfmThe steel billet that (slab heating-up coefficient) is located in heating furnace needs the temperature reached and heating furnace needs to reach Temperature, the temperature that reach can be needed with the follow-up steel billet of Extrapolation, can also Extrapolation when going out to reach the steel billet temperature Furnace temperature of heating furnace, solve the problems, such as the superheated during heating steel billet, also solve insulation cooling extent to be rolled and carry The problem of warm moment, reduce waste of fuel and reduce scaling loss amount.
It should be noted last that above embodiment is merely illustrative of the technical solution of the present invention and unrestricted, Although the present invention is described in detail with reference to example, it will be understood by those of ordinary skill in the art that, can be to the present invention Technical solution technical scheme is modified or replaced equivalently, without departing from the spirit and scope of technical solution of the present invention, it should all cover Among scope of the presently claimed invention.

Claims (1)

  1. A kind of 1. method for predicting follow-up steel billet temperature and furnace temp in heating furnace, it is characterised in that comprise the following steps：
    Establish slab heating-up Coefficient Concept and set up slab heating-up factor alphafmFormula, the slab heating-up factor alphafmRefer to furnace temperature with Under 1 DEG C of temperature difference of steel temperature, model per minute calculates the elevated numerical value of steel billet temperature, describedX is steel billet temperature per minute Degree rise numerical value, Y is furnace temperature, and Z is steel billet temperature；
    Count under different steel billet temperatures and heating-furnace temperature difference, the elevated data of steel billet temperature, according to the steel billet of statistics The elevated data of temperature, bring slab heating-up factor alpha intofmFormula, draws slab heating-up factor alphafm；
    According to obtained slab heating-up factor alphafmDerive temperature and heating furnace needs that the steel billet in heating furnace needs to reach The temperature reached；
    The α that the basis obtainsfmThe temperature that the temperature and heating furnace needs that steel billet needs of the derivation in heating furnace reach reach Degree includes：
    The difference of furnace temp and steel billet temperature is obtained, the furnace temp and the difference of steel billet temperature of obtaining includes：Most Big permission furnace temperature and the steel temperature difference=(heating furnace maximum permissible temperature-steel billet target temperature) * 80%, it is described to obtain maximum allowable stove The Wen Yugang temperature difference utilizes 2:The principle of 8 rules：The temperature difference uses 80% or so of maximum temperature difference, leaves 20% adjusting surplus；
    Heating furnace maximum temperature, the heating furnace maximum temperature bag are obtained according to the difference of the furnace temp and steel billet temperature Include：Highest furnace temp=steel billet target temperature+maximum allowable the furnace temperature and the steel temperature difference；
    Determine that steel billet enters the minimum temperature of next control section, institute according to the difference for obtaining furnace temp and steel billet temperature Stating the lowest temperature of steel billet into next control section includes：The steel billet enters minimum temperature=steel billet target temperature of next control section Degree-αfm* time * maximum allowable furnace temperature and the steel temperature difference of the steel billet at next section.
CN201610127123.0A 2016-03-07 2016-03-07 A kind of method of follow-up steel billet temperature and furnace temp in prediction heating furnace Active CN105734263B (en)

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Publication number Priority date Publication date Assignee Title
CN106650133A (en) * 2016-12-28 2017-05-10 中南大学 Simulation method of heat conducting fluid in heating furnace
CN113625801B (en) * 2021-09-03 2022-12-27 罗定职业技术学院 Temperature control method of heating furnace

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UA26512U (en) * 2007-05-15 2007-09-25 Do Metallurg Plant Open Joint Method for controlling heating rate of heating continuous furnace
CN101693945A (en) * 2009-09-29 2010-04-14 中冶南方（武汉）自动化有限公司 Pulse combustion temperature control method of heat treating furnace
CN102392122A (en) * 2011-12-05 2012-03-28 济南钢铁股份有限公司 Steel temperature-based rolling-delay furnace temperature optimization system
CN102994731A (en) * 2012-11-30 2013-03-27 中冶南方(武汉)威仕工业炉有限公司 System and method for calculating optimal heating curve of blank in heating furnace
CN103397171A (en) * 2013-08-20 2013-11-20 中冶赛迪工程技术股份有限公司 Method for determining furnace-temperature set value of billet heating furnace
CN104498702A (en) * 2014-09-03 2015-04-08 周玉杰 Stepping heating furnace and use method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UA26512U (en) * 2007-05-15 2007-09-25 Do Metallurg Plant Open Joint Method for controlling heating rate of heating continuous furnace
CN101693945A (en) * 2009-09-29 2010-04-14 中冶南方（武汉）自动化有限公司 Pulse combustion temperature control method of heat treating furnace
CN102392122A (en) * 2011-12-05 2012-03-28 济南钢铁股份有限公司 Steel temperature-based rolling-delay furnace temperature optimization system
CN102994731A (en) * 2012-11-30 2013-03-27 中冶南方(武汉)威仕工业炉有限公司 System and method for calculating optimal heating curve of blank in heating furnace
CN103397171A (en) * 2013-08-20 2013-11-20 中冶赛迪工程技术股份有限公司 Method for determining furnace-temperature set value of billet heating furnace
CN104498702A (en) * 2014-09-03 2015-04-08 周玉杰 Stepping heating furnace and use method thereof

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