CN105734263A - Method for predicting temperature of subsequent steel billet in heating furnace and temperature of heating furnace - Google Patents
Method for predicting temperature of subsequent steel billet in heating furnace and temperature of heating furnace Download PDFInfo
- Publication number
- CN105734263A CN105734263A CN201610127123.0A CN201610127123A CN105734263A CN 105734263 A CN105734263 A CN 105734263A CN 201610127123 A CN201610127123 A CN 201610127123A CN 105734263 A CN105734263 A CN 105734263A
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- heating furnace
- heating
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 139
- 239000010959 steel Substances 0.000 title claims abstract description 139
- 238000010438 heat treatment Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005096 rolling process Methods 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000013021 overheating Methods 0.000 abstract 1
- 238000002791 soaking Methods 0.000 description 6
- 238000013213 extrapolation Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Control Of Heat Treatment Processes (AREA)
Abstract
The invention discloses a method for predicting the temperature of a subsequent steel billet in a heating furnace and the temperature of the heating furnace, belonging to the technical field of strip rolling. The method for predicting the temperature of the subsequent steel billet in the heating furnace and the temperature of the heating furnace comprises the following steps of: establishing a billet heating coefficient concept to establish a billet heating coefficient alphafmThe formula (2); counting the temperature rise data of the steel billet under the difference between the temperature of different steel billets and the temperature of the heating furnace to obtain the temperature rise coefficient alpha of the steel billetfm(ii) a According to the obtained temperature rise coefficient alpha of the billetfmThe temperature to which the steel slab is required to be in the heating furnace and the temperature to which the heating furnace is required to be in the heating furnace. The method for predicting the temperature of the subsequent steel billet in the heating furnace and the temperature of the heating furnace can calculate the temperature which the subsequent steel billet needs to reach in a reverse-deducing manner, and can also calculate the temperature of the heating furnace when the temperature of the steel billet needs to reach in a reverse-deducing manner, so that the problem of overheating in the heating process of the steel billet is solved, the problems of the temperature-keeping, waiting for rolling, reducing amplitude and temperature raising time are solved, the fuel waste is reduced, and the burning loss is reduced.
Description
Technical field
The present invention relates to plate and strip rolling technology field, predict the method for follow-up steel billet temperature and furnace temp in heating furnace particularly to a kind of.
Background technology
Equipment of Hot Strip Mill heating furnace, generally individually employing Steel In Reheating Furnace base temperature mathematical model calculates steel billet temperature, the accuracy that steel billet temperature model calculates is by even buried experimental verification, then deviation is calculated according to experimental result correction model, correct model and calculate the deviation of steel temperature, the accuracy of the calculating temperature of enhancing.But in the prior art, heat in steel billet process at heater for rolling steel, how to control billet heating temperature and arrive the moment of coming out of the stove and meet milling train requirement, do not produce again the superheated problem of heating process, thus reaching to reduce waste of fuel and scaling loss, this problem is a difficult problem for puzzlement steel rolling heating specialty.
Summary of the invention
The present invention provides a kind of and predicts the method for follow-up steel billet temperature and furnace temp in heating furnace, solve or part solves and can not control billet heating temperature in prior art and arrive moment of coming out of the stove and meet milling train requirement, do not produce again the superheated technical problem of heating process.
For solving above-mentioned technical problem, the invention provides and a kind of predict that in heating furnace, the method for follow-up steel billet temperature and furnace temp comprises the following steps: set up slab heating-up Coefficient Concept and set up slab heating-up factor alphafmFormula, described slab heating-up factor alphafmRefer to that, under furnace temperature with 1 DEG C of temperature difference of steel temperature, model per minute calculates the numerical value that steel billet temperature raises, described inX is that steel billet temperature per minute raises numerical value, and Y is furnace temperature, and Z is steel billet temperature；Under the different steel billet temperature of statistics and heating-furnace temperature approach, the data that steel billet temperature raises, according to the data that the described steel billet temperature of statistics raises, bring slab heating-up factor alpha intofmFormula, draws slab heating-up factor alphafm；According to the slab heating-up factor alpha obtainedfmThe steel billet being positioned at heating furnace needs the temperature reached and heating furnace to need the temperature reached.
Further, the slab heating-up factor alpha that described basis obtainsfmThe steel billet being positioned at heating furnace needs the temperature reached and heating furnace to need the temperature reached to include: obtain the difference of furnace temp and steel billet temperature；Difference according to described furnace temp Yu steel billet temperature obtains heating furnace maximum temperature；Determine that steel billet enters the minimum temperature of next control section according to the described difference obtaining furnace temp and steel billet temperature.
Further, the difference obtaining furnace temp and steel billet temperature described in includes: described maximum allowable furnace temperature and the steel temperature difference=(heating furnace maximum permissible temperature-steel billet target temperature) * 80%.
Further, obtain maximum allowable furnace temperature and the steel temperature difference described in and utilize the principle of 2:8 rule: the temperature difference adopts about the 80% of maximum temperature difference, leaves the adjustment surplus of 20%.
Further, described heating furnace maximum temperature includes: described the highest furnace temp=steel billet target temperature+maximum allowable furnace temperature and the steel temperature difference.
Further, described steel billet enters the lowest temperature of next control section and includes: described steel billet enters the minimum temperature=steel billet target temperature-α of next control sectionfm* steel billet is in the maximum allowable furnace temperature of time * and the steel temperature difference of next section.
In prediction heating furnace provided by the invention, the method for follow-up steel billet temperature and furnace temp sets up slab heating-up factor alpha by setting up slab heating-up Coefficient ConceptfmFormula, described finger is under furnace temperature and 1 DEG C of temperature difference of steel temperature, and model per minute calculates the numerical value of steel billet temperature rising, described inX is that steel billet temperature per minute raises numerical value, and Y is furnace temperature, and Z is steel billet temperature；Under the different steel billet temperature of statistics and heating-furnace temperature approach, the data that steel billet temperature raises, according to the data that the described steel billet temperature of statistics raises, bring α intofm(slab heating-up coefficient) formula, draws αfmSlab heating-up coefficient；According to the α obtainedfm(slab heating-up coefficient) is positioned at the steel billet of heating furnace needs the temperature reached and heating furnace to need the temperature reached, the temperature that reaches can be needed by the follow-up steel billet of Extrapolation, furnace temperature of heating furnace when reaching this steel billet temperature can also be gone out by Extrapolation, solve the superheated problem in heating steel billet process, also solve insulation cooling extent to be rolled and the problem in temperature raising moment, reduce waste of fuel and reduce scaling loss amount.
Accompanying drawing explanation
Fig. 1 predicts the schematic flow sheet of the method for follow-up steel billet temperature and furnace temp in heating furnace for what the embodiment of the present invention provided.
Detailed description of the invention
Referring to Fig. 1, a kind of of embodiment of the present invention offer predicts the method for follow-up steel billet temperature and furnace temp in heating furnace, it is characterised in that comprise the following steps:
Step 1, sets up slab heating-up Coefficient Concept and sets up slab heating-up factor alphafmFormula, described slab heating-up factor alphafmRefer to that, under furnace temperature with 1 DEG C of temperature difference of steel temperature, model per minute calculates the numerical value that steel billet temperature raises, described inX is that steel billet temperature per minute raises numerical value, and Y is furnace temperature, and Z is steel billet temperature.
Step 2, under the different steel billet temperature of statistics and heating-furnace temperature approach, the data that steel billet temperature raises, according to the data that the described steel billet temperature of statistics raises, bring slab heating-up factor alpha intofmFormula, draws slab heating-up factor alphafm。
Step 3, according to the slab heating-up factor alpha obtainedfmThe steel billet being positioned at heating furnace needs the temperature reached and heating furnace to need the temperature reached.
Step 3 is discussed in detail.
The slab heating-up factor alpha that described basis obtainsfmThe steel billet being positioned at heating furnace needs the temperature reached and heating furnace to need the temperature reached to include:
Obtain the difference of furnace temp and steel billet temperature.Described maximum allowable furnace temperature and the steel temperature difference=(heating furnace maximum permissible temperature-steel billet target temperature) * 80%.Described maximum allowable furnace temperature and the steel temperature difference of obtaining utilizes the principle of 2:8 rule: the temperature difference adopts about the 80% of maximum temperature difference, leaves the adjustment surplus of 20%, leaves the space of technique change.
Difference according to described furnace temp Yu steel billet temperature obtains heating furnace maximum temperature.Described the highest furnace temp=steel billet target temperature+maximum allowable furnace temperature and the steel temperature difference.
Determine that steel billet enters the minimum temperature of next control section according to the described difference obtaining furnace temp and steel billet temperature.Described steel billet enters the minimum temperature=steel billet target temperature-α of next control sectionfm* steel billet is in the maximum allowable furnace temperature of time * and the steel temperature difference of next section.
In order to become apparent from introducing the embodiment of the present invention, introduced the using method of the embodiment of the present invention below.
Set up slab heating-up Coefficient Concept and set up slab heating-up factor alphafmFormula, described slab heating-up factor alphafmRefer to that, under furnace temperature with 1 DEG C of temperature difference of steel temperature, model per minute calculates the numerical value that steel billet temperature raises, described inX is that steel billet temperature per minute raises numerical value, and Y is furnace temperature, and Z is steel billet temperature.
Under the different steel billet temperature of statistics and heating-furnace temperature approach, the data that steel billet temperature raises；Example: the steel billet of statistics is in different furnace temperature and the intensification 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 |
Table 1 steel billet is in different furnace temperature and the intensification data under steel billet temperature difference
Utilize statistical data, bring α intofm(slab heating-up coefficient) formula, draws αfmSlab heating-up coefficient；αfm=30.5/1050=0.029048/ minute
Utilize αfm(slab heating-up coefficient) is derived and is positioned at the temperature that certain position steel billet of heating furnace needs the temperature reached and heating furnace needs to reach.
Example: in four-part form heating furnace, if the steel billet that tapping temperature is 1210 DEG C, also has and will tap for 34 minutes, it is stipulated that the highest furnace temperature that heating furnace allows is 1320 DEG C, please make minimum temperature when steel billet enters soaking zone and soaking zone needs the furnace temperature that reaches.
1. known αfm=0.029048/ minute；
2. determine that steel billet temperature and the furnace temperature of permission are poor；
Maximum allowable furnace temperature and-1210 DEG C, the steel temperature difference=1320 DEG C=110 DEG C
Utilize the principle of 2:8 rule: the temperature difference adopts the 80% of maximum temperature difference, it is therefore an objective to leaves the adjustment surplus of 20%, leaves the space of technique change.
Determine furnace temperature and the steel temperature temperature difference of actual execution: determine that in execution process, the temperature difference adopts 80 DEG C
+ 80 DEG C, furnace temperature=1210 DEG C now=1290 DEG C
3. determine that steel billet enters the minimum steel billet temperature of soaking zone；
Enter * 80 DEG C * 34 minutes=1131 DEG C, minimum steel billet temperature=1210 DEG C-0.029048/ minute of soaking zone.
Conclusion: pass through above step, it is determined that the steel billet temperature 1131 DEG C of furnace temperature 1290 DEG C and entrance soaking zone.Namely, under this furnace temperature, when the steel billet temperature of entrance soaking reaches 1131 DEG C, after 34 minutes, steel billet can reach 1210 DEG C to moment temperature of coming out of the stove.According to the α obtainedfm(slab heating-up coefficient) is positioned at the steel billet of heating furnace needs the temperature reached and heating furnace to need the temperature reached, the temperature that reaches can be needed by the follow-up steel billet of Extrapolation, furnace temperature of heating furnace when reaching this steel billet temperature can also be gone out by Extrapolation, solve the superheated problem in heating steel billet process, also solve insulation cooling extent to be rolled and the problem in temperature raising moment, reduce waste of fuel and reduce scaling loss amount.
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to example, it will be understood by those within the art that, technical scheme can be modified or equivalent replacement, without deviating from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of scope of the presently claimed invention.
Claims (6)
1. predict the method for follow-up steel billet temperature and furnace temp in heating furnace for one kind, it is characterised in that comprise the following steps:
Set up slab heating-up Coefficient Concept and set up slab heating-up factor alphafmFormula, described slab heating-up factor alphafmRefer to that, under furnace temperature with 1 DEG C of temperature difference of steel temperature, model per minute calculates the numerical value that steel billet temperature raises, described inX is that steel billet temperature per minute raises numerical value, and Y is furnace temperature, and Z is steel billet temperature；
Under the different steel billet temperature of statistics and heating-furnace temperature approach, the data that steel billet temperature raises, according to the data that the described steel billet temperature of statistics raises, bring slab heating-up factor alpha intofmFormula, draws slab heating-up factor alphafm；
According to the slab heating-up factor alpha obtainedfmThe steel billet being positioned at heating furnace needs the temperature reached and heating furnace to need the temperature reached.
2. the method for follow-up steel billet temperature and furnace temp in prediction heating furnace according to claim 1, it is characterised in that the α that described basis obtainsfmThe steel billet being positioned at heating furnace needs the temperature reached and heating furnace to need the temperature reached to include:
Obtain the difference of furnace temp and steel billet temperature；
Difference according to described furnace temp Yu steel billet temperature obtains heating furnace maximum temperature；
Determine that steel billet enters the minimum temperature of next control section according to the described difference obtaining furnace temp and steel billet temperature.
3. the method for follow-up steel billet temperature and furnace temp in prediction heating furnace according to claim 2, it is characterised in that described in obtain the difference of furnace temp and steel billet temperature and include:
Described maximum allowable furnace temperature and the steel temperature difference=(heating furnace maximum permissible temperature-steel billet target temperature) * 80%.
4. the method for follow-up steel billet temperature and furnace temp in prediction heating furnace according to claim 3, it is characterised in that:
Described maximum allowable furnace temperature and the steel temperature difference of obtaining utilizes the principle of 2:8 rule: the temperature difference adopts about the 80% of maximum temperature difference, leaves the adjustment surplus of 20%.
5. the method for follow-up steel billet temperature and furnace temp in prediction heating furnace according to claim 2, it is characterised in that described heating furnace maximum temperature includes:
Described the highest furnace temp=steel billet target temperature+maximum allowable furnace temperature and the steel temperature difference.
6. the method for follow-up steel billet temperature and furnace temp in prediction heating furnace according to claim 2, it is characterised in that described steel billet enters the lowest temperature of next control section and includes:
Described steel billet enters the minimum temperature=steel billet target temperature-α of next control sectionfm* steel billet is in the maximum allowable furnace temperature of time * and the steel temperature difference of next section.
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| CN201610127123.0A CN105734263B (en) | 2016-03-07 | 2016-03-07 | Method for predicting temperature of subsequent steel billet in heating furnace and temperature of heating furnace |
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| CN105734263A true CN105734263A (en) | 2016-07-06 |
| CN105734263B CN105734263B (en) | 2018-04-17 |
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Cited By (2)
| 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 |
| CN113625801A (en) * | 2021-09-03 | 2021-11-09 | 罗定职业技术学院 | Temperature control method of heating furnace |
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2016
- 2016-03-07 CN CN201610127123.0A patent/CN105734263B/en active Active
Patent Citations (6)
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| 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 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106650133A (en) * | 2016-12-28 | 2017-05-10 | 中南大学 | Simulation method of heat conducting fluid in heating furnace |
| CN113625801A (en) * | 2021-09-03 | 2021-11-09 | 罗定职业技术学院 | Temperature control method of heating furnace |
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| CN105734263B (en) | 2018-04-17 |
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