CN106694567B - Heating method for IF steel in ferrite rolling - Google Patents
Heating method for IF steel in ferrite rolling Download PDFInfo
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- CN106694567B CN106694567B CN201611036820.1A CN201611036820A CN106694567B CN 106694567 B CN106694567 B CN 106694567B CN 201611036820 A CN201611036820 A CN 201611036820A CN 106694567 B CN106694567 B CN 106694567B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 78
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 34
- 239000010959 steel Substances 0.000 title claims abstract description 34
- 238000005096 rolling process Methods 0.000 title claims abstract description 26
- 229910000859 α-Fe Inorganic materials 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title abstract description 8
- 238000002791 soaking Methods 0.000 claims abstract description 52
- 239000007789 gas Substances 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 5
- 238000009749 continuous casting Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims description 2
- 238000005098 hot rolling Methods 0.000 abstract description 6
- 238000010079 rubber tapping Methods 0.000 description 12
- 230000007547 defect Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention provides a heating method for IF steel in ferrite rolling, which is applied to the technical field of hot rolling, wherein a plate blank is heated in a preheating section at the furnace temperature of 500-800 ℃ until the temperature of the plate blank at the outlet of the preheating section is 300-600 ℃; heating the plate blank in a first heating section at 800-1100 ℃ until the temperature of the plate blank at the outlet of the first heating section is 600-900 ℃; heating the plate blank in the second heating section at the furnace temperature of 1000-1180 ℃ and in the atmosphere with the air excess coefficient less than 1 in the second heating section until the temperature of the plate blank at the outlet of the second heating section is 900-1120 ℃; the slab is heated in the atmosphere with the furnace temperature of 1150-1250 ℃ and the air excess coefficient less than 1 in the soaking section until the temperature of the slab at the outlet of the soaking section is 1060-1160 ℃. The invention solves the technical problem of lower quality of the rolled finished product when the existing hot rolling process is applied to rolling IF steel, and improves the overall quality of the rolled finished product.
Description
Technical field
The present invention relates to hot rolling technique field more particularly to a kind of IF steel ferrite rolling heating means.
Background technique
IF steel is widely used in auto manufacturing, especially automobile exterior panel, inner panel, with the fast development of automobile industry,
Its demand increasingly rises, and has very big market prospects.The IF base steel sheet of most of steel mill's productions is in austenite region at present
Rolling, for tapping temperature at 1200 DEG C or more, heating furnace burnup and slab burn out rate influence heating furnace all in higher level
Service life.After reducing IF plate slab tapping temperature, one side strip be easy to appear stick up skin, the surface defects such as side is split, influence
Strip surface quality；Another aspect board briquette uniformity can also be deteriorated with the reduction of tapping temperature, cause as-rolled condition
It is unstable.Therefore it is lower to be applied to mill product quality when rolling IF steel for existing hot rolling technology.
Summary of the invention
In view of the above problems, the present invention is by providing a kind of method for heating and controlling of the ferrite rolling of IF steel, Neng Gou
Ferrite area rolling solves existing hot rolling technology and is applied to mill product quality lower technical problem when rolling IF steel.
A kind of IF steel provided in an embodiment of the present invention ferrite rolling heating means, including to slab successively by plus
The preheating section of hot stove, the first bringing-up section, the second bringing-up section and soaking zone are heated: the slab is in the preheating section furnace temperature
It is heated in 500 DEG C~800 DEG C, until temperature of the slab in the outlet of the preheating section is 300 DEG C~600 DEG C；The slab
It is to be heated in 800 DEG C~1100 DEG C in the first bringing-up section furnace temperature, until the slab is in the outlet of first bringing-up section
Temperature is 600 DEG C~900 DEG C；The slab the second bringing-up section furnace temperature be 1000 DEG C~1180 DEG C in, described second plus
It is heated under atmosphere of the coefficient of excess air less than 1 in hot arc, until temperature of the slab in the outlet of second bringing-up section is
900 DEG C~1120 DEG C；The slab the soaking zone furnace temperature be 1150 DEG C~1250 DEG C in, air excess in the soaking zone
Coefficient heats under the atmosphere less than 1, until temperature of the slab in the outlet of the soaking zone is 1060 DEG C~1160 DEG C.
Preferably, the coefficient of excess air in second bringing-up section is specially 0.95~1.0, in addition to 0.95 and 1.0.
Preferably, the coefficient of excess air in the soaking zone is specially 0.93~0.98.
Preferably, the coefficient of excess air in the preheating section is 1.1~1.3.
Preferably, the coefficient of excess air in first bringing-up section is 1.0~1.05.
Preferably, the residual oxygen content of furnace tail of the heating furnace is less than or equal to 4%.
Preferably, the slab heats 60~90 minutes in the preheating section；The slab is in first bringing-up section
Interior heating 30~50 minutes；The slab heats 30~50 minutes in second bringing-up section；The slab is in the soaking
Heating 30~70 minutes in section.
Preferably, the slab successively pass through the preheating section of heating furnace, the first bringing-up section, the second bringing-up section and soaking zone into
Row heating, specifically: utilizing calorific value is 2100Kcal/Nm3~2300Kcal/Nm3Mixed gas the slab is successively passed through
The preheating section of heating furnace, the first bringing-up section, the second bringing-up section and soaking zone are heated.
Preferably, the slab is distributed in the burner hearth of the heating furnace for plum blossom cloth.
The present invention at least realizes following technical effect or advantage by the one or more technical solutions provided:
Pass through: slab is to be heated to the temperature of outlet of the slab in preheating section in 500 DEG C~800 DEG C to be in preheating section furnace temperature
300 DEG C~600 DEG C；Slab is to heat in 800 DEG C~1100 DEG C in the first bringing-up section furnace temperature, until slab going out in the first bringing-up section
The temperature of mouth is 600 DEG C~900 DEG C；Slab is in 1000 DEG C~1180 DEG C, is empty in the second bringing-up section in the second bringing-up section furnace temperature
Gas coefficient of excess heats under the atmosphere less than 1, until temperature of the slab in the outlet of the second bringing-up section is 900 DEG C~1120 DEG C；Plate
Base is to heat under atmosphere of the coefficient of excess air less than 1 in 1150 DEG C~1250 DEG C, in soaking zone in soaking zone furnace temperature, until slab
Temperature in the outlet of soaking zone is 1060 DEG C~1160 DEG C.To combine to the control of each section of in-furnace temperature and slab each
The control of the temperature of section outlet reduces each section in heating furnace of heating load, reaches tapping temperature at 1060 DEG C~1160 DEG C,
To optimize the heating curve of slab, while rear two sections of the coefficient of excess air of heating furnace is also controlled, so that optimizing plate
Two sections are weak reducing atmosphere after making while the heating curve of base, thus can to avoid stick up skin, side is split the defects of generation, from
And the present invention is realized that strip surface quality will not be reduced while slab length and thickness direction temperature uniformity, to roll
The good high IF steel of strip surface quality simultaneously of temperature uniformity is produced, and then improves the total quality of mill product.And due to
Reach lower tapping temperature, therefore energy consumption per ton steel can also be reduced.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, for this
For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is the flow chart of method for heating and controlling of the IF steel provided by the invention in ferrite rolling；
Fig. 2 is distributing mode figure of the IF steel provided by the invention in ferrite slab in heating furnace.
Specific embodiment
The embodiment of the present invention solves at least existing hot rolling by providing a kind of IF steel in the heating means of ferrite rolling
Technique is applied to mill product quality lower technical problem when rolling IF steel.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
A kind of IF steel provided in an embodiment of the present invention ferrite rolling heating means, refering to what is shown in Fig. 1, including to plate
Base successively passes through the preheating section of heating furnace, the first bringing-up section, the second bringing-up section and soaking zone and is heated, with specific reference to step
S101~S104:
S101, slab are to heat in 500 DEG C~800 DEG C in preheating section furnace temperature, until temperature of the slab in the outlet of preheating section
It is 300 DEG C~600 DEG C.
Specifically, detecting the furnace temperature of preheating section, the furnace detected by the first temperature detecting element that preheating section is arranged in
Temperature detector measured value feeds back to control equipment, and control equipment adjusts the furnace of preheating section according to the furnace temperature detected value of the first temperature detecting element
Temperature fluctuates in 500 DEG C~800 DEG C, without that will not be higher than 800 DEG C lower than 500 DEG C.
Specifically, slab heats 60~90 minutes in preheating section, by the first temperature detection member that preheating section is arranged in
Part detects that the furnace temperature detected value of preheating section feeds back to control equipment, and control equipment is based on the first temperature detection member currently obtained
After the furnace temperature detected value that part detects calculates heating slab 90 minutes, whether temperature of the slab in the outlet of preheating section can be greater than
600 DEG C, if can if control equipment control preheating section in furnace temperature reduce the first preset temperature magnitude；Control equipment is also based on currently
The furnace temperature detected value that the first temperature detecting element obtained detects calculates heating slab after sixty minutes, and slab is in preheating section
The temperature of outlet whether can less than 300 DEG C, if can if control equipment control preheating section in furnace temperature increase the first preset temperature amount
Value.
Specifically, the first preset temperature magnitude can be 500 DEG C~800 DEG C of fluctuation range according to the actual temperature of preheating section
Setting, for example, can be set to 5 DEG C, 10 DEG C, 15 DEG C, 20 DEG C etc..
By the above-mentioned control for preheating section, so that slab heats within the scope of 500 DEG C~800 DEG C of preheating section
60~90 minutes, it will be able to which the temperature by heating of plate blank extremely in the outlet of preheating section is 300 DEG C~600 DEG C.
It should be noted that in a further embodiment, being 1.1~1.3 in the coefficient of excess air of preheating section, reaching
Good operating condition when slab heats in preheating section.
S102, slab are to heat in 800 DEG C~1100 DEG C in the first bringing-up section furnace temperature, until slab going out in the first bringing-up section
The temperature of mouth is 600 DEG C~900 DEG C.
Specifically, detecting the furnace temperature of the first bringing-up section, inspection by the second temperature detecting element that the first bringing-up section is arranged in
The furnace temperature detected value measured feeds back to control equipment, the furnace temperature detected value that control equipment is detected according to second temperature detecting element
The furnace temperature for adjusting the first bringing-up section fluctuates in 800 DEG C~1100 DEG C, without that will not be higher than 1100 DEG C lower than 800 DEG C.
Specifically, slab heats 30~50 minutes in the first bringing-up section, by the second temperature that the first bringing-up section is arranged in
Degree detecting element detects that the furnace temperature detected value of the first bringing-up section feeds back to control equipment, and control equipment is based on the currently obtained
After the furnace temperature detected value that two temperature detecting elements detect calculates heating slab 50 minutes, slab is in the outlet of the first bringing-up section
Temperature whether can be greater than 900 DEG C, if can if control equipment control the first bringing-up section in furnace temperature reduce the second preset temperature amount
Value；The furnace temperature detected value that control equipment is also detected based on the second temperature detecting element currently obtained calculates heating slab 30
Minute after, slab the outlet of the first bringing-up section temperature whether can less than 600 DEG C, if can if control equipment control first heating
Furnace temperature in section increases the second preset temperature magnitude.
Specifically, the second preset temperature magnitude can according to the practical furnace temperature of the first bringing-up section can 800 DEG C of fluctuation range~
1100 DEG C of settings, for example, the second preset temperature magnitude can be set to 5 DEG C, 10 DEG C, 15 DEG C, 20 DEG C etc..
By the above-mentioned control for being directed to the first bringing-up section, so that 800 DEG C~1100 DEG C in the first bringing-up section of slab
Heating 30~50 minutes in range, it will be able to which the temperature by heating of plate blank extremely in the outlet of the first bringing-up section is 600 DEG C~900
℃。
It should be noted that in a further embodiment, the coefficient of excess air of the first bringing-up section be 1.0~
1.05, reach good operating condition when slab heats in the first bringing-up section.
S103, slab the second bringing-up section furnace temperature be 1000 DEG C~1180 DEG C in, coefficient of excess air in the second bringing-up section
It is heated under atmosphere less than 1, until temperature of the slab in the outlet of the second bringing-up section is 900 DEG C~1120 DEG C.
Specifically, detecting the furnace temperature of the second bringing-up section, inspection by the third temperature detecting element that the second bringing-up section is arranged in
The furnace temperature detected value measured feeds back to control equipment, and control equipment is detected according to the furnace temperature that third temperature detecting element detects
The furnace temperature that value adjusts the second bringing-up section fluctuates in 1000 DEG C~1180 DEG C, without that will not be higher than 1180 lower than 1000 DEG C
℃。
Specifically, slab heats 30~50 minutes in the second bringing-up section, by the third temperature that the second bringing-up section is arranged in
Degree detecting element detects that the furnace temperature detected value of the second bringing-up section feeds back to control equipment, and control equipment is based on the currently obtained
If the furnace temperature detected value that three temperature detecting elements detect calculate heating slab heated 50 minutes in the second bringing-up section after, plate
Base the outlet of the second bringing-up section temperature whether can be greater than 1120 DEG C, if can if control equipment control the second bringing-up section in furnace
The low third preset temperature magnitude of temperature drop；The furnace temperature inspection that control equipment is also detected based on the third temperature detecting element currently obtained
If measured value is calculated heated heating of plate blank 30 minutes in the second bringing-up section after, temperature of the slab in the outlet of the second bringing-up section is
It is no can less than 900 DEG C, if can if control equipment control the second bringing-up section in furnace temperature increase third preset temperature magnitude.
Specifically, third preset temperature magnitude can according to the practical furnace temperature of the second bringing-up section can 1000 DEG C of fluctuation range~
1180 DEG C of settings, for example, third preset temperature magnitude can be set to 1 DEG C, 2 DEG C, 3 DEG C, 4 DEG C, 5 DEG C, 6 DEG C etc..
By the above-mentioned control for being directed to the second bringing-up section, so that 1000 DEG C~1180 DEG C in the second bringing-up section of slab
Heating 30~50 minutes in interior range, it will be able to by heating of plate blank to the temperature in the outlet of the second bringing-up section be 900 DEG C~
1120℃。
It should be noted that in a further embodiment, the coefficient of excess air in the second bringing-up section is specially 0.95
~1.0, in addition to 0.95 and 1.0, to guarantee in the second bringing-up section as weak reducing atmosphere.
S104, slab soaking zone furnace temperature be 1150 DEG C~1250 DEG C in, gas of the coefficient of excess air less than 1 in soaking zone
It is heated under atmosphere, until temperature of the slab in the outlet of soaking zone is 1060 DEG C~1160 DEG C.
Specifically, detecting the furnace temperature of soaking zone by the 4th temperature detecting element that soaking zone is arranged in, detect
Furnace temperature detected value feeds back to control equipment, and control equipment adjusts equal according to the furnace temperature detected value that the 4th temperature detecting element detects
The furnace temperature of hot arc fluctuates in 1150 DEG C~1250 DEG C, without that will not be higher than 1250 DEG C lower than 1150 DEG C.
Specifically, slab heats 30~70 minutes in soaking zone, by the 4th temperature detection member that soaking zone is arranged in
Part detects that the furnace temperature detected value of soaking zone feeds back to control equipment, and control equipment is based on the 4th temperature detection member currently obtained
If the furnace temperature detected value that part detects calculate heating slab heat 70 minutes in soaking zone after, slab is in the outlet of soaking zone
Temperature whether can be greater than 1160 DEG C, if can if control equipment control soaking zone in furnace temperature reduce the 4th preset temperature magnitude；
If the furnace temperature detected value that control equipment is also detected based on the 4th temperature detecting element currently obtained is calculated in soaking zone
Interior heating heating of plate blank 30 minutes after, slab the outlet of soaking zone temperature whether can less than 1060 DEG C, if can if control
Equipment controls the furnace temperature in soaking zone and increases the 4th preset temperature magnitude.
Specifically, slab the outlet of soaking zone temperature be 1060 DEG C~1160 DEG C, i.e., tapping temperature be 1060 DEG C~
1160℃
Specifically, the 4th preset temperature magnitude can fluctuation range 1150 DEG C~1250 according to the practical furnace temperature of soaking zone
DEG C setting, for example, the 4th preset temperature magnitude can be set to 1 DEG C, 2 DEG C, 3 DEG C, 4 DEG C, 5 DEG C, 6 DEG C etc..
By the above-mentioned control for soaking zone, so that slab is in 1150 DEG C~1250 DEG C of soaking zone in range
Heating 30~70 minutes, it will be able to which the temperature by heating of plate blank extremely in the outlet of soaking zone is 1060 DEG C~1160 DEG C.
It should be noted that in a further embodiment, the coefficient of excess air in soaking zone is specially 0.93~
0.98, to guarantee in soaking zone as weak reducing atmosphere.
Coefficient of excess air by combining preheating section is that the coefficient of excess air of the 1.0~1.05, first bringing-up section is 1.0
Coefficient of excess air in~1.05, second bringing-up section is specially the coefficient of excess air tool in 0.95~1.0 and soaking zone
Body is 0.93~0.98, further ensures that and guarantees week reduction gas of the slab in latter two sections under lower tapping temperature state
Atmosphere, the residual oxygen content of furnace tail for reaching heating furnace are less than or equal to 4%, to accurately control the coefficient of excess air in latter two sections, no
Can it is too low caused by the serious of the thermal efficiency reduce and the deterioration of combustion conditions, will not be too high and reduce belt steel surface matter
Amount, to ensure that strip surface quality.
Specifically, being 2100Kcal/Nm using calorific value3~2300Kcal/Nm3Mixed gas to slab successively by plus
The preheating section of hot stove, the first bringing-up section, the second bringing-up section and soaking zone are heated.
The slab is distributed in the burner hearth of the heating furnace for plum blossom cloth, to keep burner hearth two sides thermic load identical.
Specifically, refering to what is shown in Fig. 2, the arrangement of plum blossom cloth distribution is first piece of 1 head of slab for entering furnace and roll
Pusher side furnace wall 2 is apart from for a；Second piece of 3 tail portion of slab for entering furnace and 4 distance of continuous casting wing furnace wall are similarly a, and third block enters the plate of furnace
Apart from being a, the 4th piece of 6 tail portion of slab for entering furnace and continuous casting wing furnace wall 4 are advised according to this apart from for a for 5 head of base and milling train wing furnace wall 2
Rule arrangement, makes heating furnace cross-sectional direction uniformity of temperature profile.For example, a=500mm, certainly, in specific implementation process
In, distance a can be adjusted according to actual needs.
Embodiment 1,1 batch slab of embodiment through IF steel provided in an embodiment of the present invention ferrite rolling heating means
Slab is heated, the parameter of each slab actually obtained is as shown in table 1, when parameter is to 1 batch heating of plate blank of embodiment in table 1
Under control equipment automatically records, as can be seen from Table 1: slab heats 71 minutes~76 minutes after entering furnace through preheating section, empty
Gas coefficient of excess 1.2, slab is at 463 DEG C -481 DEG C of temperature of the outlet of preheating section, without departing from 300 DEG C~600 DEG C of range,
Slab heats 36 minutes~40 minutes through the first bringing-up section, coefficient of excess air 1, temperature of the slab in the outlet of the first bringing-up section
842 DEG C~870 DEG C, without departing from 600 DEG C~900 DEG C of range；Slab heats 36 minutes~42 minutes through the second bringing-up section, empty
Gas coefficient of excess 0.98~0.97, slab are not above 900 DEG C at 1072 DEG C~1086 DEG C of temperature of the outlet of the second bringing-up section
~1120 DEG C of range；Slab is after soaking zone soaking 41 minutes~45 minutes, coefficient of excess air 0.96~0.94, tapping temperature
1102 DEG C~1116 DEG C of degree, is not above 1060 DEG C~1160 DEG C of range.It can be seen that excellent change slab heating curve, so as to
Under lower tapping temperature state, guarantee slab length and thickness direction temperature uniformity, length direction temperature fluctuation is 30
Within DEG C, surface defect will not occur.
The parameter of each slab actually obtained in 1. embodiment 1 of table
Embodiment 2: 2 batch slab of embodiment through IF steel provided in an embodiment of the present invention ferrite rolling heating means
Slab is heated, the parameter of practical each slab is as shown in table 2, and the parameter of table 2 is to set up to 2 batch heating of plate blank time control of embodiment
Standby to automatically record lower, as can be seen from Table 2: slab enters after furnace after preheating section heating 70 minutes~78 minutes, air excess
Coefficient 1.2, slab are not above 300 DEG C~600 DEG C of range at 505 DEG C -580 DEG C of preheating section outlet temperature；Slab is through first
Bringing-up section heats 41 minutes~47 minutes, coefficient of excess air 1.02, and slab adds 935 DEG C~957 DEG C of section outlet temperature first,
Without departing from 600 DEG C~900 DEG C of range；Slab heats 42 minutes~48 minutes through the second bringing-up section, coefficient of excess air
0.98~0.97, slab is not above 900 DEG C~1120 DEG C at 1102 DEG C~1120 DEG C of temperature of the outlet of the second bringing-up section
Range；Slab is after soaking zone soaking 51 minutes~53 minutes, coefficient of excess air 0.96~0.95, and 1135 DEG C of tapping temperature~
1142 DEG C, without departing from 1060 DEG C~1160 DEG C of range.It can be seen that equally optimize slab heating curve, can it is lower go out
Under steel state of temperature, guarantee that slab length and thickness direction temperature uniformity, length direction temperature fluctuation also do not go out in 30 DEG C
Existing surface defect.
The parameter of each slab actually obtained in 2 embodiment 2 of table
The present invention at least realizes following technical effect or advantage by the one or more technical solutions provided:
Pass through: slab is to be heated to the temperature of outlet of the slab in preheating section in 500 DEG C~800 DEG C to be in preheating section furnace temperature
300 DEG C~600 DEG C；Slab is to heat in 800 DEG C~1100 DEG C in the first bringing-up section furnace temperature, until slab going out in the first bringing-up section
The temperature of mouth is 600 DEG C~900 DEG C；Slab is in 1000 DEG C~1180 DEG C, is empty in the second bringing-up section in the second bringing-up section furnace temperature
Gas coefficient of excess heats under the atmosphere less than 1, until temperature of the slab in the outlet of the second bringing-up section is 900 DEG C~1120 DEG C；Plate
Base is to heat under atmosphere of the coefficient of excess air less than 1 in 1150 DEG C~1250 DEG C, in soaking zone in soaking zone furnace temperature, until slab
Temperature in the outlet of soaking zone is 1060 DEG C~1160 DEG C.To combine to the control of each section of in-furnace temperature and slab each
The control of the temperature of section outlet reduces each section in heating furnace of heating load, reaches tapping temperature at 1060 DEG C~1160 DEG C,
To optimize the heating curve of slab, while rear two sections of the coefficient of excess air of heating furnace is also controlled, so that optimizing plate
Two sections are weak reducing atmosphere after making while the heating curve of base, thus can to avoid stick up skin, side is split the defects of generation, from
And the present invention is realized that strip surface quality will not be reduced while slab length and thickness direction temperature uniformity, to roll
The good high IF steel of strip surface quality simultaneously of temperature uniformity is produced, and then improves the total quality of mill product.And due to
Reach lower tapping temperature, therefore energy consumption per ton steel can also be reduced.
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 IF steel is in the heating means of ferrite rolling, which is characterized in that including successively passing through the pre- of heating furnace to slab
Hot arc, the first bringing-up section, the second bringing-up section and soaking zone are heated:
The slab is to heat in 500 DEG C~800 DEG C in the preheating section furnace temperature, until the slab is in the outlet of the preheating section
Temperature be 300 DEG C~600 DEG C；
The slab is to heat in 800 DEG C~1100 DEG C in the first bringing-up section furnace temperature, until the slab adds described first
The temperature of the outlet of hot arc is 600 DEG C~900 DEG C；
The slab the second bringing-up section furnace temperature be 1000 DEG C~1180 DEG C in, air excess system in second bringing-up section
Number heats under the atmosphere less than 1, until temperature of the slab in the outlet of second bringing-up section is 900 DEG C~1120 DEG C；
The slab the soaking zone furnace temperature be 1150 DEG C~1250 DEG C in, in the soaking zone coefficient of excess air less than 1
Atmosphere under heat, until the slab the outlet of the soaking zone temperature be 1060 DEG C~1160 DEG C.
2. IF steel as described in claim 1 is in the heating means of ferrite rolling, which is characterized in that in second bringing-up section
Coefficient of excess air be specially 0.95~1.0, in addition to 0.95 and 1.0.
3. IF steel as claimed in claim 1 or 2 is in the heating means of ferrite rolling, which is characterized in that in the soaking zone
Coefficient of excess air be specially 0.93~0.98.
4. IF steel as described in claim 1 is in the heating means of ferrite rolling, which is characterized in that the sky in the preheating section
Gas coefficient of excess is 1.1~1.3.
5. IF steel as described in claim 1 is in the heating means of ferrite rolling, which is characterized in that in first bringing-up section
Coefficient of excess air be 1.0~1.05.
6. IF steel as described in claim 1 is in the heating means of ferrite rolling, which is characterized in that the furnace tail of the heating furnace
Residual oxygen content is less than or equal to 4%.
7. IF steel as described in claim 1 is in the heating means of ferrite rolling, it is characterised in that:
The slab heats 60~90 minutes in the preheating section；
The slab heats 30~50 minutes in first bringing-up section；
The slab heats 30~50 minutes in second bringing-up section；
The slab heats 30~70 minutes in the soaking zone.
8. IF steel as described in claim 1 is in the heating means of ferrite rolling, which is characterized in that the slab successively passes through
The preheating section of heating furnace, the first bringing-up section, the second bringing-up section and soaking zone are heated, specifically: be using calorific value
2100Kcal/Nm3~2300Kcal/Nm3Mixed gas to the slab successively pass through heating furnace preheating section, first heating
Section, the second bringing-up section and soaking zone are heated.
9. IF steel as described in claim 1 is in the heating means of ferrite rolling, which is characterized in that the slab adds described
Be distributed in the burner hearth of hot stove for plum blossom cloth, the arrangement of plum blossom cloth distribution are as follows: first piece of slab head for entering furnace with roll
Pusher side furnace wall distance is a；Second piece of slab tail portion for entering furnace and continuous casting wing furnace wall distance are similarly a, and third block enters the slab of furnace
Head and milling train wing furnace wall distance are a, and the 4th piece of slab tail portion for entering furnace and continuous casting wing furnace wall distance are a, according to this rule arrangement.
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| CN107537857A (en) * | 2017-07-10 | 2018-01-05 | 首钢京唐钢铁联合有限责任公司 | Ferrite rolling method |
| CN109772883A (en) * | 2019-01-30 | 2019-05-21 | 北京首钢股份有限公司 | A kind of production method of IF steel |
| CN110157872B (en) * | 2019-04-19 | 2021-02-26 | 首钢京唐钢铁联合有限责任公司 | Heating method for reducing burning loss rate of plate blank of heat accumulating type heating furnace |
| CN110814030B (en) * | 2019-10-11 | 2021-03-16 | 山东盛阳金属科技股份有限公司 | A kind of heat-resistant composite stainless steel and its hot rolling production process |
| CN110961467A (en) * | 2019-12-24 | 2020-04-07 | 攀钢集团西昌钢钒有限公司 | A control method for reducing warping defects of double regenerative heating furnaces |
| CN111412755A (en) * | 2020-03-03 | 2020-07-14 | 首钢京唐钢铁联合有限责任公司 | A method for reducing nitrogen oxide emission concentration of steel rolling heating furnace |
| CN114472557B (en) * | 2022-01-27 | 2023-06-20 | 本钢板材股份有限公司 | A heating method for preventing iron sheet defects of hot-rolled pickling sheets |
| CN115369235A (en) * | 2022-07-15 | 2022-11-22 | 首钢京唐钢铁联合有限责任公司 | A control method and electronic equipment for heating low-carbon steel in a ferritic rolling process |
| CN117086115A (en) * | 2023-09-18 | 2023-11-21 | 重庆钢铁股份有限公司 | A steel billet heating control method, electronic equipment and storage medium |
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