CN106694567A - Heating method for IF steel in ferrite rolling - Google Patents
Heating method for IF steel in ferrite rolling Download PDFInfo
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- CN106694567A CN106694567A CN201611036820.1A CN201611036820A CN106694567A CN 106694567 A CN106694567 A CN 106694567A CN 201611036820 A CN201611036820 A CN 201611036820A CN 106694567 A CN106694567 A CN 106694567A
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- 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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Abstract
The invention provides a heating method for IF steel in ferrite rolling and is applied to the technical field of hot rolling. A slab is heated in a preheating section at the furnace temperature ranging from 500 DEG C to 800 DEG C till the temperature of the slab at an outlet of the preheating section ranges from 300 DEG C to 600 DEG C; the slab is heated in a first heating section at the furnace temperature ranging from 800 DEG C to 1100 DEG C till the temperature of the slab at an outlet of the first heating section ranges from 600 DEG C to 900 DEG C; the slab is heated in a second heating section at the furnace temperature ranging from 1000 DEG C to 1180 DEG C and in the atmosphere that the coefficient of excess air in the second heating section is smaller than 1 till the temperature of the slab at an outlet of the second heating section ranges from 900 DEG C to 1120 DEG C; and the slab is heated in a soaking section at the furnace temperature ranging from 1150 DEG C to 1250 DEG C and in the atmosphere that the coefficient of excess air in the soaking section is smaller than 1 till the temperature of the slab at an outlet of the soaking section ranges from 1060 DEG C to 1160 DEG C. The heating method solves the technical problem that when an existing hot rolling technology is applied to IF steel rolling, the quality of rolled finished products is low, and the overall quality of the rolled finished products is improved.
Description
Technical field
The present invention relates to hot rolling technique field, more particularly to a kind of IF steel is in the heating means of ferrite rolling.
Background technology
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, with very big market prospects.The IF base steel sheets of most of steel mill's productions are in austenite region at present
Rolling, more than 1200 DEG C, heating furnace burnup and slab burn out rate are all in higher level for tapping temperature, while influenceing heating furnace
Service life.After IF plate slab tapping temperatures are reduced, easily there is sticking up skin, side and the surface defect, influence such as splits in one side strip
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 mill product quality is relatively low when existing hot rolling technology is applied to roll IF steel.
The content 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 rolls, and solves existing hot rolling technology and is applied to mill product quality relatively low technical problem during rolling IF steel.
A kind of IF steel provided in an embodiment of the present invention ferrite rolling heating means, including slab is sequentially passed through 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
Heated in 500 DEG C~800 DEG C, extremely the slab is 300 DEG C~600 DEG C in the temperature of the outlet of the preheating section；The slab
Be to be heated in 800 DEG C~1100 DEG C in the first bringing-up section furnace temperature, to the slab first bringing-up section outlet
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
Heated under atmosphere of the coefficient of excess air less than 1 in hot arc, be in the temperature of the outlet of second bringing-up section to the slab
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 is heated under the atmosphere less than 1, and extremely the slab is 1060 DEG C~1160 DEG C in the temperature of the outlet of the soaking zone.
Preferably, the coefficient of excess air in second bringing-up section is specially 0.95~1.0.
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 stove tail of the heating furnace is less than or equal to 4%.
Preferably, the slab is heated 60~90 minutes in the preheating section；The slab is in first bringing-up section
Interior heating 30~50 minutes；The slab is heated 30~50 minutes in second bringing-up section；The slab is in the soaking
Heating 30~70 minutes in section.
Preferably, the slab sequentially passes through the preheating section of heating furnace, the first bringing-up section, the second bringing-up section and soaking zone and enters
Row heating, specially：It is 2100Kcal/Nm using calorific value3~2300Kcal/Nm3Mixed gas the slab is sequentially 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 the distribution of plum blossom cloth in the burner hearth of the heating furnace.
The present invention at least realizes following technique effect or advantage by one or more technical schemes for providing：
Pass through：Slab is to be heated to slab in 500 DEG C~800 DEG C to be in the temperature of the outlet of preheating section in preheating section furnace temperature
300 DEG C~600 DEG C；Slab is to be heated in 800 DEG C~1100 DEG C in the first bringing-up section furnace temperature, to slab going out in the first bringing-up section
The temperature of mouth is 600 DEG C~900 DEG C；Slab is sky in 1000 DEG C~1180 DEG C, in the second bringing-up section in the second bringing-up section furnace temperature
Gas coefficient of excess less than 1 atmosphere under heat, to slab the outlet of the second bringing-up section temperature be 900 DEG C~1120 DEG C；Plate
Base is to be heated 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, to slab
It it is 1060 DEG C~1160 DEG C in the temperature of the outlet of soaking zone.So as 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 also controlling latter two sections of heating furnace of coefficient of excess air so that optimize plate
Two sections is weak reducing atmosphere after making while the heating curve of base, therefore can avoid sticking up the generation that skin, side such as split at the defect, from
And the present invention realizes and strip surface quality will not be reduced while slab length and thickness direction temperature homogeneity, so as to roll
Temperature homogeneity well strip surface quality IF steel high simultaneously is made, and then the total quality of mill product is improve.And due to
Relatively low tapping temperature is reached, therefore energy consumption per ton steel can also be reduced.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, for this
For the those of ordinary skill of field, on the premise of not paying creative work, can also obtain other according to these accompanying drawings
Accompanying drawing.
The flow chart of method for heating and controlling of the Fig. 1 for the IF steel for providing of the invention in ferrite rolling；
Distributing mode figures of the Fig. 2 for the IF steel for providing of the invention in ferrite slab in heating furnace.
Specific embodiment
The embodiment of the present invention solve at least existing hot rolling by providing a kind of heating means of IF steel in ferrite rolling
Technique is applied to mill product quality relatively low technical problem during rolling IF steel.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
A kind of IF steel provided in an embodiment of the present invention ferrite rolling heating means, with reference to shown in Fig. 1, including to plate
Base sequentially 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 preheating section furnace temperature be 500 DEG C~800 DEG C in heat, to slab the outlet of preheating section temperature
It is 300 DEG C~600 DEG C.
Specifically, detecting the furnace temperature of preheating section, the stove for detecting by being arranged on the first detector unit of preheating section
Temperature detector measured value feeds back to control device, and control device adjusts the stove of preheating section according to the furnace temperature detected value of the first detector unit
Temperature fluctuates in 500 DEG C~800 DEG C, without being also not above 800 DEG C less than 500 DEG C.
Specifically, slab is heated 60~90 minutes in preheating section, by the first temperature detection unit for being arranged on preheating section
The furnace temperature detected value that part detects preheating section feeds back to control device, and control device is based on current the first temperature detection unit for obtaining
The furnace temperature detected value that part is detected calculated heating slab after 90 minutes, and whether slab can be more than in the temperature of the outlet of preheating section
600 DEG C, if can if control device control preheating section in furnace temperature reduction the first preset temperature value；Control device is also based on current
The furnace temperature detected value that the first detector unit for obtaining is detected calculated heating slab after 60 minutes, and slab is in preheating section
The temperature of outlet whether can be less than 300 DEG C, if can if control device control preheating section in furnace temperature raise the first preset temperature amount
Value.
Specifically, the first preset temperature value can 500 DEG C~800 DEG C of fluctuation range according to the actual temperature of preheating section
Set, such as, could be arranged 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 is heated in the range of 500 DEG C~800 DEG C of preheating section
60~90 minutes, it becomes possible to by heating of plate blank to preheating section outlet temperature be 300 DEG C~600 DEG C.
It should be noted that being 1.1~1.3 in the coefficient of excess air of preheating section in a further embodiment, reach
Good operating mode when slab is heated in preheating section.
S102, slab are to be heated in 800 DEG C~1100 DEG C in the first bringing-up section furnace temperature, to 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 being arranged on the second temperature detecting element of the first bringing-up section
The furnace temperature detected value for measuring feeds back to control device, the furnace temperature detected value that control device 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 being also not above 1100 DEG C less than 800 DEG C.
Specifically, slab is heated 30~50 minutes in the first bringing-up section, by the second temperature for being arranged on the first bringing-up section
The furnace temperature detected value that degree detecting element detects the first bringing-up section feeds back to control device, control device be based on it is current obtain the
The furnace temperature detected value that two detector units are detected calculates heating slab after 50 minutes, outlet of the slab in the first bringing-up section
Temperature whether can be more than 900 DEG C, if can if control device control the first bringing-up section in furnace temperature reduction the second preset temperature amount
Value；The furnace temperature detected value that control device is also detected based on the current second temperature detecting element for obtaining calculates heating slab 30
Minute after, slab the outlet of the first bringing-up section temperature whether can be less than 600 DEG C, if can if control device control first heat
Furnace temperature in section raises the second preset temperature value.
Specifically, the second preset temperature value can according to the actual furnace temperature of the first bringing-up section can 800 DEG C of fluctuation range~
1100 DEG C of settings, such as, the second preset temperature value could be arranged 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
In the range of heat 30~50 minutes, it becomes possible to by heating of plate blank to the first bringing-up section outlet temperature be 600 DEG C~900
℃。
It should be noted that in a further embodiment, the first bringing-up section coefficient of excess air for 1.0~
1.05, reach good operating mode when slab is heated 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
Under atmosphere less than 1 heat, to slab the outlet of the second bringing-up section temperature be 900 DEG C~1120 DEG C.
Specifically, detecting the furnace temperature of the second bringing-up section, inspection by being arranged on the 3rd detector unit of the second bringing-up section
The furnace temperature detected value for measuring feeds back to control device, the furnace temperature detection that control device is detected according to the 3rd detector unit
The furnace temperature of value the second bringing-up section of regulation fluctuates in 1000 DEG C~1180 DEG C, without being also not above 1180 less than 1000 DEG C
℃。
Specifically, slab is heated 30~50 minutes in the second bringing-up section, by the 3rd temperature for being arranged on the second bringing-up section
The furnace temperature detected value that degree detecting element detects the second bringing-up section feeds back to control device, control device be based on it is current obtain the
If the furnace temperature detected value that three detector units are detected calculates heating slab in the second bringing-up section after heating 50 minutes, plate
Base the outlet of the second bringing-up section temperature whether can be more than 1120 DEG C, if can if control device control the second bringing-up section in stove
The low 3rd preset temperature value of temperature drop；The furnace temperature inspection that control device is also detected based on current the 3rd detector unit for obtaining
If measured value is calculated heated heating of plate blank after 30 minutes in the second bringing-up section, slab is in the temperature of the outlet of the second bringing-up section
No meeting be less than 900 DEG C, if can if control device control the second bringing-up section in furnace temperature raise the 3rd preset temperature value.
Specifically, the 3rd preset temperature value can according to the actual furnace temperature of the second bringing-up section can 1000 DEG C of fluctuation range~
1180 DEG C of settings, such as, the 3rd preset temperature value could be arranged 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 scope, it becomes possible to by heating of plate blank to the outlet in the second bringing-up section temperature for 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, it is weak reducing atmosphere to ensure in the second bringing-up section.
S104, slab are gas of the coefficient of excess air less than 1 in 1150 DEG C~1250 DEG C, in soaking zone in soaking zone furnace temperature
Under atmosphere heat, to slab the outlet of soaking zone temperature be 1060 DEG C~1160 DEG C.
Specifically, the furnace temperature of soaking zone is detected by being arranged on the 4th detector unit of soaking zone, what detection was obtained
Furnace temperature detected value feeds back to control device, and control device is equal according to the furnace temperature detected value regulation that the 4th detector unit is detected
The furnace temperature of hot arc fluctuates in 1150 DEG C~1250 DEG C, without being also not above 1250 less than 1150 DEG C.
Specifically, slab is heated 30~70 minutes in soaking zone, by the 4th temperature detection unit for being arranged on soaking zone
The furnace temperature detected value that part detects the second bringing-up section feeds back to control device, and control device is based on current the 4th temperature inspection for obtaining
If survey element testing to furnace temperature detected value calculate heating slab in the soaking zone after heating 30 minutes, slab is in soaking zone
The temperature of outlet whether can be more than 1160 DEG C, if can if control device control soaking zone in furnace temperature reduction the 4th preset temperature amount
Value；If the furnace temperature detected value that control device is also detected based on current the 4th detector unit for obtaining is calculated in soaking
Whether the interior heating heating of plate blank after 70 minutes of section, slab can be less than 1060 DEG C in the temperature of the outlet of soaking zone, if can if control
Furnace temperature in control equipment control soaking zone raises the 4th preset temperature value.
Specifically, slab the outlet of soaking zone temperature for 1060 DEG C~1160 DEG C, i.e. tapping temperature be 1060 DEG C~
1160℃
Specifically, the 3rd preset temperature value can according to the actual furnace temperature of the second bringing-up section can 1150 DEG C of fluctuation range~
1250 DEG C of settings, such as, the 4th preset temperature value could be arranged 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 scope in 1150 DEG C~1250 DEG C of soaking zone
Heating 30~70 minutes, it becomes possible to by heating of plate blank to soaking zone outlet temperature be 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, it is weak reducing atmosphere to ensure in the second bringing-up section.
It is 1.0 by the coefficient of excess air that the coefficient of excess air for combining preheating section is the 1.0~1.05, first bringing-up section
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 week reduction gas of the guarantee slab in latter two sections under relatively low tapping temperature state
Atmosphere, reaches the residual oxygen content of stove tail of heating furnace less than or equal to 4%, with the coefficient of excess air in two sections after accurate control, no
The serious reduction and the deterioration of combustion conditions of the thermal efficiency can be too low and cause, also will not be too high and reduce belt steel surface matter
Amount, so as to ensure that strip surface quality.
Specifically, being 2100Kcal/Nm using calorific value3~2300Kcal/Nm3Mixed gas slab is sequentially passed through 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 the distribution of plum blossom cloth in the burner hearth of the heating furnace, so that burner hearth both sides thermic load is identical.
Specifically, with reference to shown in Fig. 2, the arrangement of plum blossom cloth distribution is first piece and enters the head of slab 1 of stove and roll
Pusher side furnace wall 2 is apart from being a；Second piece of afterbody of slab 3 for entering stove is similarly a, the 3rd block of plate for entering stove with the distance of continuous casting wing furnace wall 4
With milling train wing furnace wall 2 apart from being a, the 4th piece enters the afterbody of slab 6 and continuous casting wing furnace wall 4 of stove apart from being a to the head of base 5, advises according to this
Rule arrangement, makes heating furnace cross-sectional direction uniformity of temperature profile.For example, a=500mm, certainly, in specific implementation process
In, can adjust according to actual needs apart from a.
Embodiment 1, the batch slab of embodiment 1 through IF steel provided in an embodiment of the present invention ferrite rolling heating means
Heating slab, the parameter of each slab for actually obtaining is as shown in table 1, when parameter is to 1 batch heating of plate blank of embodiment in table 1
What control device was recorded automatically, as can be seen from Table 1：Slab is heated 71 minutes~76 minutes after stove is entered through preheating section, empty
Gas coefficient of excess 1.2, slab the outlet of preheating section 463 DEG C -481 DEG C of temperature, without departing from 300 DEG C~600 DEG C of scope,
Slab is heated 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 scope；Slab is heated 36 minutes~42 minutes through the second bringing-up section, empty
Gas coefficient of excess 0.98~0.97, slab is not above 900 DEG C in 1072 DEG C~1086 DEG C of the temperature of the outlet of the second bringing-up section
~1120 DEG C of scope；Slab is after soaking zone soaking 41 minutes~45 minutes, and coefficient of excess air 0.96~0.94, tapping is warm
1102 DEG C~1116 DEG C of degree, is not above 1060 DEG C~1160 DEG C of scope.It can be seen that excellent change slab heating curve such that it is able to
Under relatively low tapping temperature state, it is ensured that slab length and thickness direction temperature homogeneity, length direction temperature fluctuation is 30
Also be not in surface defect within DEG C.
The parameter of each slab actually obtained in the embodiment 1 of table 1.
Embodiment 2：The batch slab of embodiment 2 through IF steel provided in an embodiment of the present invention ferrite rolling heating means
Heating slab, as shown in table 2, the parameter of table 2 is that the batch heating of plate blank time control of embodiment 2 is set up to the parameter of actual each slab
For what is recorded automatically, as can be seen from Table 2：After slab enters and is heated 70 minutes~78 minutes through preheating section after stove, air excess
Coefficient 1.2, slab is not above 300 DEG C~600 DEG C of scope in 505 DEG C -580 DEG C of preheating section outlet temperature；Slab is through first
Bringing-up section is heated 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 scope；Slab is through the second bringing-up section heating 42 minutes~48 minutes, coefficient of excess air
0.98~0.97, slab is not above 900 DEG C~1120 DEG C in 1102 DEG C~1120 DEG C of the temperature of the outlet of the second bringing-up section
Scope；Slab after soaking zone soaking 51 minutes~53 minutes, coefficient of excess air 0.96~0.95,1135 DEG C of tapping temperature~
1142 DEG C, without departing from 1060 DEG C~1160 DEG C of scope.It can be seen that equally optimizing slab heating curve, can go out in relatively low
Under steel state of temperature, it is ensured that slab length and thickness direction temperature homogeneity, length direction temperature fluctuation do not go out in 30 DEG C yet
Existing surface defect.
The parameter of each slab actually obtained in the embodiment 2 of table 2
The present invention at least realizes following technique effect or advantage by one or more technical schemes for providing：
Pass through：Slab is to be heated to slab in 500 DEG C~800 DEG C to be in the temperature of the outlet of preheating section in preheating section furnace temperature
300 DEG C~600 DEG C；Slab is to be heated in 800 DEG C~1100 DEG C in the first bringing-up section furnace temperature, to slab going out in the first bringing-up section
The temperature of mouth is 600 DEG C~900 DEG C；Slab is sky in 1000 DEG C~1180 DEG C, in the second bringing-up section in the second bringing-up section furnace temperature
Gas coefficient of excess less than 1 atmosphere under heat, to slab the outlet of the second bringing-up section temperature be 900 DEG C~1120 DEG C；Plate
Base is to be heated 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, to slab
It it is 1060 DEG C~1160 DEG C in the temperature of the outlet of soaking zone.So as 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 also controlling latter two sections of heating furnace of coefficient of excess air so that optimize plate
Two sections is weak reducing atmosphere after making while the heating curve of base, therefore can avoid sticking up the generation that skin, side such as split at the defect, from
And the present invention realizes and strip surface quality will not be reduced while slab length and thickness direction temperature homogeneity, so as to roll
Temperature homogeneity well strip surface quality IF steel high simultaneously is made, and then the total quality of mill product is improve.And due to
Relatively low tapping temperature is reached, therefore energy consumption per ton steel can also be reduced.
, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described
Property concept, then can make other change and modification to these embodiments.So, appended claims are intended to be construed to include excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention
God and scope.So, if these modifications of the invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (9)
1. heating means of a kind of IF steel in ferrite rolling, it is characterised in that including sequentially 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 be heated in 500 DEG C~800 DEG C in the preheating section furnace temperature, extremely outlet of the slab in the preheating section
Temperature be 300 DEG C~600 DEG C；
The slab is to be heated in 800 DEG C~1100 DEG C in the first bringing-up section furnace temperature, is added described first to the slab
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 is heated under the atmosphere less than 1, and extremely the slab is 900 DEG C~1120 DEG C in the temperature of the outlet of second bringing-up section；
The slab is that coefficient of excess air is less than 1 in 1150 DEG C~1250 DEG C, in the soaking zone in the soaking zone furnace temperature
Atmosphere under heat, to the slab the outlet of the soaking zone temperature be 1060 DEG C~1160 DEG C.
2. heating means of the IF steel as claimed in claim 1 in ferrite rolling, it is characterised in that in second bringing-up section
Coefficient of excess air be specially 0.95~1.0.
3. heating means of the IF steel as claimed in claim 1 or 2 in ferrite rolling, it is characterised in that in the soaking zone
Coefficient of excess air be specially 0.93~0.98.
4. heating means of the IF steel as claimed in claim 1 in ferrite rolling, it is characterised in that the sky in the preheating section
Gas coefficient of excess is 1.1~1.3.
5. heating means of the IF steel as claimed in claim 1 in ferrite rolling, it is characterised in that in first bringing-up section
Coefficient of excess air be 1.0~1.05.
6. heating means of the IF steel as claimed in claim 1 in ferrite rolling, it is characterised in that the stove tail of the heating furnace
Residual oxygen content is less than or equal to 4%.
7. heating means of the IF steel as claimed in claim 1 in ferrite rolling, it is characterised in that：
The slab is heated 60~90 minutes in the preheating section；
The slab is heated 30~50 minutes in first bringing-up section；
The slab is heated 30~50 minutes in second bringing-up section；
The slab is heated 30~70 minutes in the soaking zone.
8. heating means of the IF steel as claimed in claim 1 in ferrite rolling, it is characterised in that the slab is sequentially passed through
The preheating section of heating furnace, the first bringing-up section, the second bringing-up section and soaking zone are heated, specially：It is using calorific value
2100Kcal/Nm3~2300Kcal/Nm3Mixed gas the slab is sequentially passed through the preheating section of heating furnace, first heating
Section, the second bringing-up section and soaking zone are heated.
9. heating means of the IF steel as claimed in claim 1 in ferrite rolling, it is characterised in that the slab described plus
For plum blossom cloth is distributed in the burner hearth of hot stove.
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| CN201611036820.1A CN106694567B (en) | 2016-11-22 | 2016-11-22 | A kind of heating means of IF steel in ferrite rolling |
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| CN201611036820.1A CN106694567B (en) | 2016-11-22 | 2016-11-22 | A kind of heating means of IF steel in ferrite rolling |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107537857A (en) * | 2017-07-10 | 2018-01-05 | 首钢京唐钢铁联合有限责任公司 | A kind of 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 |
| CN110157872A (en) * | 2019-04-19 | 2019-08-23 | 首钢京唐钢铁联合有限责任公司 | A kind of heating means reducing recuperative heater slab burn out rate |
| CN110814030A (en) * | 2019-10-11 | 2020-02-21 | 山东盛阳金属科技股份有限公司 | Heat-resistant composite stainless steel and hot rolling production process thereof |
| CN110961467A (en) * | 2019-12-24 | 2020-04-07 | 攀钢集团西昌钢钒有限公司 | Control method for reducing warping defect of double-heat-accumulation type heating furnace |
| CN111412755A (en) * | 2020-03-03 | 2020-07-14 | 首钢京唐钢铁联合有限责任公司 | Method for reducing emission concentration of nitric oxide in steel rolling heating furnace |
| CN114472557A (en) * | 2022-01-27 | 2022-05-13 | 本钢板材股份有限公司 | Heating method for preventing iron sheet defects of hot-rolled pickled plate |
| CN115369235A (en) * | 2022-07-15 | 2022-11-22 | 首钢京唐钢铁联合有限责任公司 | Control method for heating low-carbon steel under ferrite rolling process and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 | A kind of 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 |
| CN110157872A (en) * | 2019-04-19 | 2019-08-23 | 首钢京唐钢铁联合有限责任公司 | A kind of heating means reducing recuperative heater slab burn out rate |
| 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 |
| CN110814030A (en) * | 2019-10-11 | 2020-02-21 | 山东盛阳金属科技股份有限公司 | Heat-resistant composite stainless steel and hot rolling production process thereof |
| CN110814030B (en) * | 2019-10-11 | 2021-03-16 | 山东盛阳金属科技股份有限公司 | Heat-resistant composite stainless steel and hot rolling production process thereof |
| CN110961467A (en) * | 2019-12-24 | 2020-04-07 | 攀钢集团西昌钢钒有限公司 | Control method for reducing warping defect of double-heat-accumulation type heating furnace |
| CN111412755A (en) * | 2020-03-03 | 2020-07-14 | 首钢京唐钢铁联合有限责任公司 | Method for reducing emission concentration of nitric oxide in steel rolling heating furnace |
| CN114472557A (en) * | 2022-01-27 | 2022-05-13 | 本钢板材股份有限公司 | Heating method for preventing iron sheet defects of hot-rolled pickled plate |
| CN115369235A (en) * | 2022-07-15 | 2022-11-22 | 首钢京唐钢铁联合有限责任公司 | Control method for heating low-carbon steel under ferrite rolling process and electronic equipment |
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