CN108645233B - A method of it reduces and heats the time to be rolled - Google Patents
A method of it reduces and heats the time to be rolled Download PDFInfo
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- CN108645233B CN108645233B CN201810464766.3A CN201810464766A CN108645233B CN 108645233 B CN108645233 B CN 108645233B CN 201810464766 A CN201810464766 A CN 201810464766A CN 108645233 B CN108645233 B CN 108645233B
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- heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0028—Regulation
- F27D2019/0034—Regulation through control of a heating quantity such as fuel, oxidant or intensity of current
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Heat Treatment Processes (AREA)
- Metal Rolling (AREA)
Abstract
The present invention relates to metallurgical technology field more particularly to a kind of methods for reducing the heating time to be rolled, which comprises determines for heating the quantity of the heating furnace of steel billet to be rolled and the heating time of each heating furnace；According to the heating temperature of the steel billet to be rolled and average interval time to be rolled and the heating time, the heating total time of each heating furnace is determined；According to the heating total time of the heating furnace, determine the heating furnace in soaking zone, the furnace temperature of the first bringing-up section and the second bringing-up section and heating time respectively；According to the heating furnace in soaking zone, the furnace temperature of the first bringing-up section and the second bringing-up section and heating time, determine the heating furnace in soaking zone, the gas flow of the first bringing-up section and the second bringing-up section.The present invention can efficiently reduce the time to be rolled, and then can be improved billet quality.
Description
Technical field
The present invention relates to metallurgical technology field more particularly to a kind of methods for reducing the heating time to be rolled.
Background technique
Heater for rolling steel is the main energy consumption equipment of rolling system, accounts for the 60~70% of steel rolling energy consumption, is steel rolling process
Energy saving emphasis.With the requirement of steel products quality in recent years, steel rolling heating is more and more important, and the purpose of blank heating is to make blank
Reach the required Temperature Distribution of rolling when coming out of the stove, during normal production, heating furnace is in a kind of relatively stable states or dynamic is flat
Weighing apparatus.Many dynamic factors, which will lead to heating furnace, to be run under stationary conditions, wherein to be rolled is exactly one in furnace operation
A typical dynamic process.Once to be rolled occur, original balance will not exist, and heating furnace output sports zero.When to be rolled,
Blank no longer moves in furnace, if heating system does not make the appropriate adjustments, blank temperature will constantly rise, this not only will lead to combustion
Material waste also will lead to more oxidations and decarburization, seriously affect heating steel billet quality.
The prior art during the rolling process, due to milling train overhaul and be delayed rolling and so on, there are blank heatings
The problem of time to be rolled increases thereby results in steel rolling heating unit consumption and increases, and steel billet burning causes oxidization burning loss to be significantly increased, sternly
The quality of steel billet is affected again.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State the method that the time to be rolled is heated in the reduction of problem.
The embodiment of the present invention provides a kind of method for reducing and heating the time to be rolled, which comprises
It determines for heating the quantity of the heating furnace of steel billet to be rolled and the heating time of each heating furnace；
According to the heating temperature of the steel billet to be rolled and average interval time to be rolled and the heating time, determine every
The heating total time of a heating furnace；
According to the heating total time of the heating furnace, determine the heating furnace in soaking zone, the first bringing-up section and respectively
The furnace temperature of two bringing-up sections and heating time；
According to the heating furnace in soaking zone, the furnace temperature of the first bringing-up section and the second bringing-up section and heating time, institute is determined
Heating furnace is stated in soaking zone, the gas flow of the first bringing-up section and the second bringing-up section.
Preferably, further includes:
During the rolling process, the running parameter fluctuation range of the heating furnace is controlled less than or equal to 4%.
Preferably, the running parameter includes: in gas flow, air mass flow, flue gas flow, pressure, temperature and furnace temperature
At least one parameter.
Preferably, further includes:
2~5 minutes after beginning to be rolled, the furnace temperature for controlling the heating furnace reduces by 10~20 DEG C per minute.
Preferably, further includes:
3~5 minutes before end to be rolled, the furnace temperature for controlling the heating furnace increases 10~20 DEG C per minute.
Preferably, further includes:
It is 5~10 minutes when the time to be rolled, the gas flow for controlling the soaking zone of the heating furnace reduces 4~20%, with
And the furnace temperature of the control heating furnace reduces by 30~50 DEG C.
Preferably, further includes:
It is 10~15 minutes when the time to be rolled, the tapping quantity of the most heating furnace of control tapping quantity reduces by 10~
15%, and the gas flow reduction by 20~30% of the most heating furnace of tapping quantity is controlled, and control tapping quantity is most
Heating furnace furnace temperature reduce by 50~100 DEG C.
Preferably, further includes:
It is 15~30 minutes when the time to be rolled, the heating furnace of control tapping minimum number stops working.
Preferably, further includes:
When the time to be rolled is small greater than 1, soaking zone, the first bringing-up section and the second bringing-up section of the heating furnace are controlled respectively
Furnace temperature respectively reduce by 200~300 DEG C, keep the temperature to furnace.
One or more technical solutions in the embodiment of the present invention, have at least the following technical effects or advantages:
When the present invention determines the heating of the quantity and each heating furnace for heating the heating furnace of steel billet to be rolled first
Between, then, according to the heating temperature of steel billet to be rolled and average interval time and heating time to be rolled, determine each heating furnace
Heating total time, and, according to the heating total time of heating furnace, respectively determine heating furnace soaking zone, the first bringing-up section and
The furnace temperature of second bringing-up section and heating time, and, according to heating furnace in soaking zone, the furnace of the first bringing-up section and the second bringing-up section
The mild heat time determines that heating furnace in soaking zone, the gas flow of the first bringing-up section and the second bringing-up section, effectively reduces
Time to be rolled, and then can be improved billet quality.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, identical component is indicated with identical reference pattern.In the accompanying drawings:
Fig. 1 shows the flow chart for reducing in the embodiment of the present invention and heating the method for time to be rolled；
Fig. 2 shows the structural schematic diagrams of rolling system in the embodiment of the present invention.
Fig. 3 shows the structural schematic diagram of the rolling system in the embodiment of the present invention comprising data line.
Wherein, 11 be the first heating furnace, and 12 be the second heating furnace, and 13 be third heating furnace, and 14 be the 4th heating furnace, and 2 are
Roughing mill, 3 be finishing mill, and 4 be industrial personal computer, and 5 be soaking zone parameter acquisition branch line, and 6 be the first bringing-up section parameter acquisition branch
Line, 7 be the second bringing-up section parameter acquisition branch line, and 8 be data connection branch line, and 9 be data data acquisition bus, and 10 is total for data control
Line.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
The embodiment of the present invention provides a kind of method for reducing and heating the time to be rolled, as shown in Figure 1, which comprises
Step 101: determining for heating the quantity of the heating furnace of steel billet to be rolled and the heating time of each heating furnace.
Specifically, heating furnace can be determined according to the tapping total amount of steel billet to be rolled and the tapping quantity of single heating furnace
Quantity, specifically, can according to formula one determine operation heating furnace quantity:
Wherein, PoFor the tapping total amount of steel billet to be rolled, unit kg, PmFor the tapping quantity of single heating furnace, unit is
Kg, n are the quantity of the heating furnace of operation.
Meanwhile the tapping quantity of can be tapped per hour according to each heating furnace quantity and the heating furnace, determine each add
The heating time of hot stove specifically can determine the heating time of each heating furnace according to formula two:
Wherein, tiFor the heating time of i-th of heating furnace, unit h, PiFor i-th of heating furnace tapping number hourly
Amount, unit kg/h, PmFor the tapping quantity of single heating furnace, unit kg.
It should be noted that in embodiments of the present invention, the tapping quantity of all heating furnaces is all the same.In addition, of the invention
A specific embodiment is provided, in this specific embodiment, the quantity of heating furnace is 4, and therefore, i successively takes 1~4.
Step 102: when according to the heating temperature of the steel billet to be rolled and average interval time to be rolled and the heating
Between, determine the heating total time of each heating furnace.Wherein, heating heating time of the total time based on heating furnace and to steel rolling
The average interval to be rolled of base determines.
Specifically, the heating total time of each heating furnace can be determined according to formula three:
Wherein, tziFor the heating total time of i-th of heating furnace, unit h, WgFor the heating temperature of steel billet to be rolled, unit
For DEG C, Δ tdFor the average interval to be rolled of steel billet to be rolled, unit min.
Step 103: according to the heating total time of the heating furnace, determining that the heating furnace adds in soaking zone, first respectively
The furnace temperature and heating time of hot arc and the second bringing-up section.
Specifically, according to the heating total time of each heating furnace, determine that each heating furnace adds in soaking zone, first respectively
The furnace temperature and heating time of hot arc and the second bringing-up section specifically determine furnace temperature and heating time using following one group of formula:
Wherein, WaFor the furnace temperature of the soaking zone of heating furnace, Wj1For the furnace temperature of the first bringing-up section of heating furnace, Wj2For heating furnace
The second bringing-up section furnace temperature, the unit of furnace temperature is DEG C tjiFor the soaking zone of heating furnace, the first bringing-up section and the second bringing-up section
Heating time, unit min.
Step 104: according to the heating furnace in the furnace mild heat of soaking zone, the first bringing-up section and the second bringing-up section
Between, determine the heating furnace in soaking zone, the gas flow of the first bringing-up section and the second bringing-up section.
Specifically, heating furnace can be determined in soaking zone, the coal of the first bringing-up section and the second bringing-up section according to formula five
Throughput；
Wherein, VmFor the gas flow of either segment in soaking zone, the first bringing-up section and the second bringing-up section, unit m3/ h, k
For correction factor, QmFor the low heating value of coal gas, unit kJ/m3, CmFor coal gas specific heat, unit is kJ/ (m3DEG C), WiFor with Vm
Corresponding one section of furnace temperature, unit are DEG C.
In embodiments of the present invention, during the rolling process, under normal circumstances, each heating furnace is successively handed over according to setting time
For tapping, the time to be rolled should be controlled within 2 minutes, meanwhile, the running parameter fluctuation range of heating furnace is less than or equal to 4%,
Wherein, running parameter includes at least one of gas flow, air mass flow, flue gas flow, pressure, temperature and furnace temperature parameter.
And in the case where occurring to be rolled, 2~5 minutes after beginning to be rolled, the furnace temperature for controlling heating furnace reduces per minute
10~20 DEG C.3~5 minutes before end to be rolled, the furnace temperature for controlling heating furnace increases 10~20 DEG C per minute, wherein when heating
It can heat up according to linear scale.
It further, is 5~10 minutes when the time to be rolled, the gas flow for controlling the soaking zone of heating furnace reduces 4~20%,
And the furnace temperature of control heating furnace reduces by 30~50 DEG C.
It further, is 10~15 minutes when the time to be rolled, the tapping quantity of the most heating furnace of control tapping quantity reduces
10~15%, and the gas flow reduction by 20~30% of the most heating furnace of tapping quantity is controlled, and control tapping quantity
The furnace temperature of most heating furnaces reduces by 50~100 DEG C.It should be noted that when there are multiple heating furnaces, it is first determined go out
The most heating furnace of steel quantity is target heating furnace, and the tapping quantity for then controlling target heating furnace reduces by 10~15%, coal gas
Flow-reduction 20~30% and furnace temperature reduce by 50~100 DEG C, and when an only heating furnace, then the heating furnace is determined as
Target heating furnace, and execute control process similar to the above.
It further, is 15~30 minutes when the time to be rolled, the heating furnace of control tapping minimum number stops working.Meanwhile
Reset the work in every parameter of the heating furnace of operation.
Further, when the time to be rolled is small greater than 1, the soaking zone of heating furnace is controlled respectively, the first bringing-up section and second adds
The furnace temperature of hot arc respectively reduces by 200~300 DEG C, keeps the temperature to furnace.
The present invention provides a specific embodiment and treats steel rolling base in this embodiment using 4 heating furnaces and added below
Heat, 4 heating furnaces intersect tapping, and the tapping timetable of 4 heating furnaces is referring to following table one.
Table one
Meanwhile by taking the operational parameter control of the first heating furnace 11 in above-described embodiment as an example, the fortune of the first heating furnace 11
Row control parameter such as following table two:
Table two
For above-described embodiment, in normal rolling, the first heating furnace 11, the second heating furnace 12, third heating furnace
13 and the 4th heating furnace 14 successively according to setting time alternately tap, coal gas, air, flue gas flow, pressure and temperature, furnace temperature wave
Dynamic range does not surpass 4%, in the case where situation to be rolled occurs, starts 2~5 minutes to be rolled, the furnace temperature for controlling each heating furnace is per minute
10~20 DEG C are reduced, 3~5 minutes before end to be rolled, the furnace temperature for controlling each heating furnace increases 10~20 DEG C per minute；When to
Rolling the time is 5~10 minutes, successively reduces the first heating furnace 11, the second heating furnace 12, third heating furnace 13 and the 4th heating furnace
The gas flow 4%~20% of 14 soaking zone reduces by 30~50 DEG C of furnace temperature；It is 10 minutes~15 minutes between being waited for when to be rolled,
Reduce the first heating furnace 11, the second heating furnace 12, in third heating furnace 13 and the 4th heating furnace 14 more than hour tapping quantity plus
The tapping quantity of hot stove, gas flow reduce by 20%~30%, reduce by 50~100 DEG C of furnace temperature；It is 15 minutes between being waited for when to be rolled
~30 minutes, one in the first heating furnace 11 out of service, the second heating furnace 12, third heating furnace 13 and the 4th heating furnace 14
Heating furnace is heated total time with tapping quantity, time and the speed of this heating furnace for resetting operation, and soaking zone, first add
The furnace temperature and heating time and gas flow of hot arc and the second bringing-up section；When the time to be rolled surpass one it is small when more than, the first heating furnace
11, the soaking zone of the second heating furnace 12, third heating furnace 13 and the 4th heating furnace 14, the first bringing-up section and the second bringing-up section furnace temperature
200~300 DEG C of heat preservations are reduced respectively to furnace.
In embodiments of the present invention, the operating parameter of heating furnace controls software realization by industrial personal computer and controls to adjust.
The present invention effectively reduces the time to be rolled by control strategy to be rolled, adjusts the operating parameter of heating furnace in time, thus
It ensure that blank with the heating of rolling demand, guarantees rolling quality.By the timely adjustment of the parameters such as gas flow and furnace temperature, have
Effect reduces fuel consumption caused by load burning, to reach the target for reducing Unit Consumption of Furnace and improving heating efficiency.Pass through
Control to be rolled can effectively reduce blank burning or overheat with the timely adjustment of time to be rolled, so that the oxidation for reducing blank is burnt
Damage, realizes the raising of lumber recovery.Meanwhile control process is simple, it is efficient and convenient.
The present invention also provides a kind of rolling systems of method that the time to be rolled is heated using above-mentioned reduction below, such as Fig. 2 institute
Show, which includes multiple heating furnaces, roughing mill 2, finishing mill 3 and industrial personal computer 4, and multiple heating furnaces are for treating steel rolling base
It is heated, the exit of multiple heating furnaces is arranged in roughing mill 2, and the exit of roughing mill 2, heating furnace is arranged in finishing mill 3
It is connected between industrial personal computer 4 by data line, after multiple heating furnaces are treated and roll heating steel billet, is utilized respectively roughing mill 2 and essence
Milling train 3 treats the progress roughing of steel rolling base and finish rolling, industrial personal computer 4 acquire the operating parameter of multiple heating furnaces by data line, and right
Operating parameter is controlled.
The application by increasing multiple heating furnaces in rolling system, and by the operating parameter to multiple heating furnaces into
Row is adjusted respectively can efficiently reduce the time to be rolled, and then can be improved billet quality.Simultaneously, additionally it is possible to reduce fuel and disappear
Consumption reduces unit consumption, improves heating efficiency, reduce oxidization burning loss, improves lumber recovery, and the control process in system is simple, fast
Victory is convenient.
Specifically, in embodiments of the present invention, the heating furnace in rolling system can be increased to 4, respectively
One heating furnace 11, the second heating furnace 12, third heating furnace 13 and the 4th heating furnace 14.The operating parameter of heating furnace includes Gas Flow
At least one of amount, air mass flow, flue gas flow, pressure, furnace temperature and residual oxygen.Data line includes soaking zone parameter acquisition branch
Line 5, the first bringing-up section parameter acquisition branch line 6, the second bringing-up section parameter acquisition branch line 7, data connection branch line 8, data are adopted
Collect bus 9 and data control bus 10, corresponding soaking zone parameter acquisition branch line 5, one first heating of a heating furnace
Section parameter acquisition branch line 6, second bringing-up section parameter acquisition branch lines, 7, data connection branch lines 8 and a data are adopted
Collect bus 9, the soaking zone of heating furnace is connect with the first end of data connection branch line 8 by soaking zone parameter acquisition branch line 5, added
First bringing-up section of hot stove is connect by the first bringing-up section parameter acquisition branch line 6 with the first end of data connection branch line 8, is heated
Second bringing-up section of furnace is connect by the second bringing-up section parameter acquisition branch line 7 with the first end of data connection branch line 8, and data connect
The second end for connecing branch line 8 is connect by data data acquisition bus 9 with the first end of data control bus 10, data control bus 10
Second end is connect with industrial personal computer 4.When rolling system is there are when 4 heating furnaces, then rolling system includes 4 soaking zone parameter acquisitions
7,4 data connections of the second bringing-up section parameter acquisition branch line of the first bringing-up section parameter acquisition branch line 6,4 of branch line 5,4
8,4 data data acquisition bus 9 of branch line and a data control bus 10, connection relationship is as shown in Figure 3.
Further, rolling system of the invention can also include dephosphorization apparatus and flying shear, and dephosphorization apparatus is arranged in heating furnace
Between roughing mill 2.Flying shear is arranged between roughing mill 2 and finishing mill 3.
In short, present invention determination first is for heating the quantity of the heating furnace of steel billet to be rolled and adding for each heating furnace
The hot time then according to the heating temperature of steel billet to be rolled and average interval time and heating time to be rolled, determines each add
The heating total time of hot stove, and, according to the heating total time of heating furnace, determine heating furnace in soaking zone, the first heating respectively
The furnace temperature and heating time of section and the second bringing-up section, and, according to heating furnace in soaking zone, the first bringing-up section and the second bringing-up section
Furnace temperature and heating time, determine that heating furnace in soaking zone, the gas flow of the first bringing-up section and the second bringing-up section, effectively subtracts
Lack the time to be rolled, and then can be improved billet quality.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (9)
1. a kind of reduce the method for heating the time to be rolled, which is characterized in that the described method includes:
It determines for heating the quantity of the heating furnace of steel billet to be rolled and the heating time of each heating furnace；
According to the heating temperature of the steel billet to be rolled and average interval time to be rolled and the heating time, each institute is determined
State the heating total time of heating furnace；
According to the heating total time of the heating furnace, determine that the heating furnace adds in soaking zone, the first bringing-up section and second respectively
The furnace temperature of hot arc and heating time；
According to the heating furnace in soaking zone, the furnace temperature of the first bringing-up section and the second bringing-up section and heating time, described add is determined
Hot stove is in soaking zone, the gas flow of the first bringing-up section and the second bringing-up section.
2. as described in claim 1 reduce the method for heating the time to be rolled, which is characterized in that further include:
During the rolling process, the running parameter fluctuation range of the heating furnace is controlled less than or equal to 4%.
3. as claimed in claim 2 reduce the method for heating the time to be rolled, which is characterized in that the running parameter includes: coal
At least one of throughput, air mass flow, flue gas flow, pressure, temperature and furnace temperature parameter.
4. as described in claim 1 reduce the method for heating the time to be rolled, which is characterized in that further include:
2~5 minutes after beginning to be rolled, the furnace temperature for controlling the heating furnace reduces by 10~20 DEG C per minute.
5. as described in claim 1 reduce the method for heating the time to be rolled, which is characterized in that further include:
3~5 minutes before end to be rolled, the furnace temperature for controlling the heating furnace increases 10~20 DEG C per minute.
6. as described in claim 1 reduce the method for heating the time to be rolled, which is characterized in that further include:
It is 5~10 minutes when the time to be rolled, the gas flow for controlling the soaking zone of the heating furnace reduces by 4~20%, and control
The furnace temperature for making the heating furnace reduces by 30~50 DEG C.
7. as described in claim 1 reduce the method for heating the time to be rolled, which is characterized in that further include:
It is 10~15 minutes when the time to be rolled, the tapping quantity of the most heating furnace of control tapping quantity reduces by 10~15%, with
And control the gas flow reduction by 20~30% of the most heating furnace of tapping quantity, and the heating furnace that control tapping quantity is most
Furnace temperature reduce by 50~100 DEG C.
8. as described in claim 1 reduce the method for heating the time to be rolled, which is characterized in that further include:
It is 15~30 minutes when the time to be rolled, the heating furnace of control tapping minimum number stops working.
9. as described in claim 1 reduce the method for heating the time to be rolled, which is characterized in that further include:
When the time to be rolled is small greater than 1, the soaking zone of the heating furnace, the furnace of the first bringing-up section and the second bringing-up section are controlled respectively
Warm each 200~300 DEG C of reduction, keeps the temperature to furnace.
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| JPS60124411A (en) * | 1983-12-12 | 1985-07-03 | Hitachi Ltd | Control method of finishing temperature of rolling mill |
| CN102294361B (en) * | 2010-06-25 | 2013-03-27 | 上海梅山钢铁股份有限公司 | Method for controlling equal-gap steel rolling |
| CN106282533B (en) * | 2015-05-27 | 2018-01-26 | 宝山钢铁股份有限公司 | A kind of temprature control method to be rolled of heating furnace |
| CN105420486B (en) * | 2015-11-03 | 2017-06-23 | 邯钢集团邯宝钢铁有限公司 | A kind of heater for rolling steel method for heating and controlling suitable for pipe line steel |
| CN105222581B (en) * | 2015-11-16 | 2017-04-19 | 攀钢集团攀枝花钢钒有限公司 | Method adopting walking beam type heating furnace for heating low temperature billets |
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