CN110234775A - Continuous annealing furnace - Google Patents
Continuous annealing furnace Download PDFInfo
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- CN110234775A CN110234775A CN201880009466.4A CN201880009466A CN110234775A CN 110234775 A CN110234775 A CN 110234775A CN 201880009466 A CN201880009466 A CN 201880009466A CN 110234775 A CN110234775 A CN 110234775A
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- steel plate
- cooling
- continuous annealing
- preheating zone
- heating tape
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
- C21D9/5735—Details
- C21D9/5737—Rolls; Drums; Roll arrangements
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
- C21D9/677—Arrangements of heating devices
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Continuous annealing furnace of the invention is the continuous annealing furnace for having the steel plate of preheating zone, heating tape, soaking zone and cooling zone, the cooling units such as cooling furnace roller cooling device are carried out with cooling gas is blown to the axial ends portion for the furnace roller for being set to heating tape, cooling unit uses the atmosphere gas of preheating zone as cooling gas.
Description
Technical field
The present invention relates to the continuous annealing furnaces for possessing preheating zone.
Background technique
In the past, there is known following continuous annealing furnaces: that is, the continuous annealing furnace have preheating zone, heating tape, soaking zone and
Cooling zone conveys steel plate by being set to the furnace roller of the corona shape with convex of each band on one side, carries out steel plate on one side
Annealing.In addition, there is known: in such continuous annealing furnace, usually pass through cooling device to the furnace for being set to heating tape
The axial ends portion of roller is blown cooling gas, thus makes the reduction of roll thermal crown as the corona shape of furnace roller concave, to press down
Steel plate processed wriggles (patent document 1 etc.).
Patent document 1: Japanese Unexamined Patent Publication 7-331336 bulletin
However, it is previous, as above-mentioned cooling gas, heat exchange is carried out thus will be by spoke by heat exchanger and cooling water
The atmosphere gas cooling for penetrating the heating tape of pipe heating is come using therefore there are problems that energy efficiency is poor etc.
Summary of the invention
The present invention is to complete in view of the above problems, and its purpose is to provide the evils that one kind can either inhibit energy efficiency
Change, and is able to suppress the continuous annealing furnace of the wriggling of steel plate.
In order to solve the above problems and reach purpose, continuous annealing furnace according to the present invention is that have preheating zone, heating
Band, soaking zone and cooling zone steel plate continuous annealing furnace, which is characterized in that there is cooling unit, above-mentioned cooling unit to
The axial ends portion blowing cooling gas of the furnace roller of above-mentioned heating tape is set to be cooled down, above-mentioned cooling unit uses above-mentioned
The atmosphere gas of preheating zone is as above-mentioned cooling gas.
In addition, in above-mentioned invention, continuous annealing furnace according to the present invention is characterized in that, above-mentioned preheating zone and upper
Heating tape is stated to be connected to via the preheating zone and the interconnecting part of the heating tape is connected, by above-mentioned interconnecting part from above-mentioned preheating zone to
Above-mentioned heating tape conveys steel plate, is blown above-mentioned cooling gas to the axial ends portion of above-mentioned furnace roller by above-mentioned cooling unit,
Thus the atmosphere gas of above-mentioned heating tape flows into above-mentioned preheating zone via above-mentioned interconnecting part.
In addition, in above-mentioned invention, continuous annealing furnace according to the present invention is characterized in that, in above-mentioned preheating band logical
Passing through fan, pipeline and heat exchanger composition have the circulatory system, which utilizes from the spoke for being set to above-mentioned heating tape
Penetrate the heat of the burning waste gas of pipe, and the atmosphere gas body circulation for making the preheating zone, above-mentioned cooling unit use is from above-mentioned
The above-mentioned atmosphere gas of pipe branch is as above-mentioned cooling gas.
In addition, in above-mentioned invention, continuous annealing furnace according to the present invention is characterized in that, there is control unit,
Above-mentioned control unit is according to the plate thickness and board width of above-mentioned steel plate, to whether executing the above-mentioned furnace roller carried out by above-mentioned cooling unit
The cooling in axial ends portion controlled.
In addition, in above-mentioned invention, continuous annealing furnace according to the present invention is characterized in that, relative to leading
The broadening amount of the board width for the steel plate that the board width of steel plate is then gone be greater than specified amount when, start conveying after row steel plate it
Before, start the cooling in the axial ends portion of the above-mentioned furnace roller carried out by above-mentioned cooling unit.
In continuous annealing furnace according to the present invention, cooling unit by compared with the atmosphere gas of heating tape temperature it is lower
Preheating zone atmosphere gas as cooling gas, and be blown and cooled down to the axial ends portion of furnace roller, therefore play both
It is able to suppress the deterioration of energy efficiency, and is able to suppress the effect of the wriggling of steel plate.
Detailed description of the invention
Fig. 1 is the schematic diagram for indicating the structure of continuous annealing line involved in embodiment.
Fig. 2 is the explanatory diagram of the circulatory system of the atmosphere gas of preheating zone, furnace roller cooling device etc..
Fig. 3 is the explanatory diagram for being set to the chamber of furnace roller cooling device.
Fig. 4 is the explanatory diagram for the circulation of the atmosphere gas between preheating zone and heating tape.
Fig. 5 is the explanatory diagram for the centering power for acting on the narrow steel plate of width.
Fig. 6 is to indicate the using and do not use of furnace roller cooling device, the chart with the plate thickness of steel plate and the relationship of board width.
Fig. 7 (a) is the figure indicated the case where conveying leading steel plate without using furnace roller cooling device.Fig. 7 (b) is to indicate
It goes after making the steel plate wider than leading steel plate width come figure the case where conveying.
Specific embodiment
Hereinafter, based on attached drawing to an embodiment of the continuous annealing line for having continuous annealing furnace according to the present invention
It is described in detail.In addition, the present invention is not limited to present embodiments.
Fig. 1 is the schematic diagram for indicating the structure of continuous annealing line 100 involved in embodiment.It is shown in FIG. 1 continuously to move back
Firewire 100, which has, unreels disk 101a, 101b, bonding machine 102, cleaning equipment 103, stretch flattener 104, entrance side binding-off machine
105, continuous annealing furnace 106, water quenching equipment 107, outlet side binding-off machine 108, pressure regulation mill 109, trimmer 110, oil feeder
111, shearing machine 112 and tension reel 113a, 113b etc..
Helical form will be wound as by the steel plate 2 of continuous annealing line 100 by unreeling disk 101a, 101b.It is unreeled by rewinding this
Disk 101a, 101b will successively be sent out by the steel plate 2 of continuous annealing line 100 to continuous annealing line 100.In addition, passing through back segment
Bonding machine 102 welds the rear end of leading steel plate 2 and the front end of the steel plate 2 of rear row, so that passing through the steel of continuous annealing line 100
Plate 2 links and passes through continuous annealing line 100.
In cleaning equipment 103, steel plate 2 passes through in the medium high speed of liquor, so that the grease etc. for being attached to steel plate 2 is gone
It removes.Thereafter, steel plate 2 is by the correction strain of stretch flattener 104, and is transported to entrance side binding-off machine 105.
Entrance side binding-off machine 105 in order to back segment annealing, and keep the tension of steel plate 2 and make steel plate 2 temporarily to
Machine.Continuous annealing furnace 106 is transported to by the steel plate 2 after 105 timing adjustment of entrance side binding-off machine.
Continuous annealing furnace 106 is downstream configured in order preheating zone 106a, heating tape from steel plate conveying direction upstream side
106b, soaking zone 106c and cooling zone 106d.106a, heating tape 106b, soaking zone 106c and cooling zone in preheating zone
106d is that starting point is turned back 180 degree with these furnace rollers 16 in upper and lower part configured with more than one furnace roller 16 (referring to Fig. 2),
Thus steel plate 2 is repeatedly conveyed in the up-down direction, to form multiple paths.In addition, making steel plate at the furnace roller 16 of a part
2 do not turn back and carry out direction conversion with right angle, to keep steel plate 2 mobile to next band.Furnace roller 16 is in the corona shape of convex,
The corona shape of the convex in roller surface there is the diameter of axial central portion to be greater than taper as the diameter in axial ends portion.By
This, can make the steel plate conveyed by furnace roller 16 2 automatically be centered at the axial center of furnace roller 16, so as to inhibit steel plate 2
To the wriggling of width direction.
In continuous annealing furnace 106, preheating zone 106a and heating tape 106b have been connected to each other via by the lower part of respective band
The interconnecting part 106e that comes and be connected to, heating tape 106b and soaking zone 106c are via the lower part of respective band to be joined to one another
Interconnecting part 106f and be connected to, soaking zone 106c is connected to cooling zone 106d via what the lower part of respective band was joined to one another
Portion 106g and be connected to.
In preheating zone 106a, steel plate 2 is imported from the opening portion (steel plate introduction part) for being set to its underpart, by aftermentioned such
The circulatory system, by the gas of heat exchange having been carried out with the burning waste gas of aftermentioned radiant tube come heating steel sheet 2.In heating tape
106b and soaking zone 106c is able to use radiant tube (not shown) indirect heating steel plate 2 as heating unit.Steel plate 2 is being added
After tropical 106b and soaking zone 106c heating anneal to predetermined temperature, in cooling zone 106d cooling metal sheets 2.In addition, in this implementation
In mode, the atmosphere gas temperature of preheating zone 106a is 200 [DEG C] left and right, and the atmosphere gas temperature of heating tape 106b is 700
[DEG C]~800 [DEG C].
Steel plate 2 after annealing is transported to outlet side binding-off machine 108 via water quenching equipment 107.Outlet side binding-off machine 108 is
The post-processing of back segment keeps the tension of steel plate 2 and keeps steel plate 2 temporarily standby.Pressure regulation mill 109 is for from outlet side
The equipment that the steel plate 2 that binding-off machine 108 is sent out carries out skin-pass.Steel plate 2 after skin-pass is via by trimmer 110, oil supply
The post-processing section that device 111 and shearing machine 112 are constituted, is wound to tension reel 113a, 113b.Trimmer 110 is cut off from steel plate 2
Unwanted part.Oil feeder 111 is to 2 oiling of steel plate.Shearing machine 112 cuts through inspection operation and the bad part that checks.
In addition, (not scheming in the process computer that continuous annealing line 100 is provided with the operation of management continuous annealing line 100
Show).The process computer is for example to rewinding the conveying of the sequence of batching products, steel plate 2 of steel plate 2 for unreeling disk 101a, 101b and passing through
Speed, specification, plate thickness, board width, length and the furnace temperature of each band of continuous annealing furnace 106 of the steel plate 2 that constitute steel plate 2 etc.
It is managed.
Here, in the 106b of heating tape, furnace roller 16 and steel plate 2 not in contact with the temperature of part be heated the atmosphere with 106b
Gas heats and rises.On the other hand, near the entrance side of heating tape 106b, compared with the environment temperature of heating tape 106b,
Lower via the temperature of the interconnecting part 106e steel plate 2 for entering to heating tape 106b from preheating zone 106a, furnace roller 16 connects with steel plate 2
The temperature of the part of touching and the temperature close of steel plate 2.Therefore, the both ends compared with central portion be can be realized in the axial direction of furnace roller 16
Portion is the Temperature Distribution of high temperature.Moreover, according to thermal dilation difference, if not maintaining the corona shape of the initial convex of furnace roller 16
It is less than the bizet shape of the concave of taper as the diameter in axial ends portion as the diameter in roller surface with axial central portion
Shape cannot then make the steel plate conveyed by furnace roller 16 2 automatically be centered at the axial center of furnace roller 16, lead to that steel plate 2 easily occurs
It wriggles.In addition, relative to the convexity assigned in advance to furnace roller 16, by due to temperature change caused by the contact of steel plate 2 etc. and
It is known as roll thermal crown in the convexity that furnace roller 16 generates.
Fig. 2 is the explanatory diagram of the circulatory system of the atmosphere gas of preheating zone 106a, furnace roller cooling device 80 etc..Fig. 3 is to set
It is placed in the explanatory diagram of the chamber 81 of furnace roller cooling device 80.As shown in Fig. 2, constituting has the circulatory system, which is used for
Preheating zone 106a is by fan 10, circulating line 20 and heat exchanger 40, using from the radiation for being set to heating tape 106b
The heat of the burning waste gas of pipe, and make the atmosphere gas body circulation of preheating zone 106a.In the circulatory system, make from heating tape
The burning waste gas of the discharges such as the radiant tube 60 of 106b, thus will be in the circulation pipe connecting with heat exchanger 40 by heat exchanger 40
The recyclegas heating flowed in road 20, moreover, constituting are as follows: by the recyclegas heated in this way from being set in the 106a of preheating zone
Chamber 50 be blown to by the steel plate 2 of preheating zone 106a come heating steel sheet 2.
In addition, the ratio fan 10 in circulating line 20 is close to downstream side and than heat exchanger 40 close to the position of upstream side
It sets, is provided with the lateral 30 from 20 branch of circulating line, so that one of the recyclegas flowed in circulating line 20
It is diverted into lateral 30.In addition, lateral 30 be provided with block valve 91, flow rate regulating valve 92, pressure gauge 93 and with
The distribution pipe 31 that chamber 81 connects.A part of the recyclegas of circulating line 20 is admitted to by fan 10 from preheating zone 106a
The lateral 30 from 20 branch of circulating line is flowed into, and is admitted to chamber 81 via distribution pipe 31.Moreover, as shown in figure 3, sending
Enter axial ends portion blowing of the recyclegas of chamber 81 as cooling gas from jet port 81a, 81b to furnace roller 16, thus cold
But the axial ends portion of furnace roller 16.
In the present embodiment, fan 10 used in the circulatory system of preheating zone 106a is also used as from preheating zone 106a
To the fan of the chamber 81 of heating tape 106b conveying atmosphere gas.Accordingly, it is not necessary to for by atmosphere gas from preheating zone 106a
It is delivered to the dedicated fan of the chamber 81 of heating tape 106b, therefore can be realized cost effective.
In the continuous annealing furnace 106 involved in embodiment, heat shield panel is provided between furnace roller 16 and radiant tube 60
70, the heat shield panel 70 be provided with steel plate 2 can by slit, by blocking the radiation from radiant tube 60 with heat shield panel 70
Heat, so that the temperature for reducing the atmosphere gas of 16 vicinity of furnace roller rises.As a result, with not set heat shield panel 70 the case where compared with,
Make the part of furnace roller 16 contacted with steel plate 2, reduced with the temperature difference for the part of furnace roller 16 not contacted with steel plate 2.In addition,
Heating tape 106b is provided with temperature in the space for 16 side of furnace roller that the space by heat shield panel 70 and 60 side of radiant tube distinguishes
Degree meter 3.
In the present embodiment, configured with the chamber 81 near the entrance side for being set to heating tape 106b, at the chamber 81
Between furnace roller 16 and heat shield panel 70 and in the lower section of furnace roller 16, two sprays are correspondingly provided with the axial ends portion of furnace roller 16
Loophole 81a, 81b.The chamber 81 constitutes cooling unit, and the cooling unit is using the atmosphere gas of preheating zone 106a as cooling air
Body is blown from each jet port 81a, 81b to the axial ends portion of furnace roller 16 to be cooled down.Moreover, by the atmosphere of preheating zone 106a
Enclose gas as cooling gas, be blown by chamber 81 to the axial ends portion of furnace roller 16, thus, it is possible to by with heating tape
Atmosphere gas (cooling gas) of the atmosphere gas of 106b compared to the lower preheating zone 106a of temperature will be heated the atmosphere with 106b
The axial ends portion for enclosing the furnace roller 16 of gas heating is cooling, so as to reduce the roll thermal crown of furnace roller 16 of heating tape 106b,
And it is able to suppress the wriggling of steel plate 2.
In addition, by the way that the atmosphere gas of the lower preheating zone 106a of temperature compared with the atmosphere gas of heating tape 106b is made
It is used to carry out cooling cooling gas for being blown to the axial ends portion of furnace roller 16, is thus used as above-mentioned cooling gas,
The atmosphere gas cooling for not needing to will be irradiated the heating tape 106b of the heating of pipe 60 is come using therefore being able to suppress energy efficiency
Deteriorate.Also, it does not need the dedicated atmosphere gas to heating tape 106b for obtaining above-mentioned cooling gas and carries out cooling
Cooling device, thus, it is possible to realize cost effective, equipment miniaturization.
Fig. 4 is the explanatory diagram for the circulation of the atmosphere gas between preheating zone 106a and heating tape 106b.Implementing
In continuous annealing furnace 106 involved in mode, the atmosphere gas in the 106a of preheating zone is sent by fan 10 from preheating zone 106a
Enter heating tape 106b, thus the internal pressure of preheating zone 106a is depressurized, and the internal pressure of heating tape 106b is pressurized.Cause
This, the atmosphere gas of heating tape 106b generates the interconnecting part 106e by connection preheating zone 106a and heating tape 106b and flows into pre-
Air-flow as tropical 106a.The steel plate 2 for being located at the outlet side position of interconnecting part 106e, preheating zone 106a as a result, adds in entrance
It is heated the atmosphere gas heating with 106b before tropical 106b, therefore the steel of the entrance side vicinity of heating tape 106b can be reduced
The temperature difference of the atmosphere gas temperature of the temperature and heating tape 106b of plate 2.Thus, near the entrance side of heating tape 106b, furnace
The temperature for the part of roller 16 contacted with steel plate 2 contracts with the temperature difference of the temperature for the part of furnace roller 16 not contacted with steel plate 2
It is small, so as to reduce the axial temperature gradient of furnace roller 16, and inhibits to generate in furnace roller 16 and become because of thermal dilation difference
Roll thermal crown as the corona shape of concave.
Fig. 5 is the explanatory diagram for the centering power for acting on the narrow steel plate of width.In the furnace of the corona shape for convex
Roller 16 has the power that steel plate 2 is felt relieved in the cone effect of roller surface, but as shown in figure 5, the board width of steel plate 2 is narrower, with furnace
The area of the cone contact of roller 16 is smaller, and centering power is also smaller, therefore is easy to wriggle.In addition, if the thinner thickness of steel plate 2 and just
Spend it is lower, then in the case where the centering power of the cone of furnace roller 16 is too strong relative to the rigidity of steel plate 2, it is possible to steel plate 2 send out
Raw bending (turn round and twist).In particular, if cooling down the axial ends portion of furnace roller 16, the furnace thus contacted with steel plate 2 by cooling gas
The axial central portion of roller 16 is significantly thermally expanded compared with axial ends portion, so as to cause the taper of the corona shape of convex
Angle becomes larger, then using wider steel plate 2 of thin and wide degree, above-mentioned bending (turn round and twist) is possible to become obvious.
In addition, 2 width of steel plate is wider, the part of furnace roller 16 not contacted with steel plate 2 is fewer, therefore the temperature ladder in the axial direction of furnace roller 16
Degree reduces, and thermal dilation difference also reduces, and so as to maintain the corona shape of convex, and is difficult to generate wriggling.
Accordingly it is also possible to constitute are as follows: according to the size by the steel plate 2 of continuous annealing furnace 106, only be easy to wriggle making and
It is difficult to happen and turns round stubborn thickness and when the narrow steel plate 2 of width is annealed by continuous annealing furnace 106, by cooling gas from setting
The chamber 81 for being placed in heating tape 106b is blown to the axial ends portion of furnace roller 16.For example, being indicated meeting in Fig. 6 with oblique line
In the case where the relationship of the plate thickness t and board width W of range, cooling cooling dress is carried out using the axial ends portion to furnace roller 16
It sets, in the case where meeting the relationship of plate thickness t and board width W of the range other than it, without using the axial ends to furnace roller 16
Portion carries out cooling cooling device.
In addition, can also be set according to the condition of plate thickness and board width using cooling device from chamber
The pressure of 81 cooling gas being blown to the axial ends portion of furnace roller 16.In the continuous annealing furnace 106 involved in embodiment,
The cooling gas of the axial ends portion blowing from chamber 81 to furnace roller 16 can be executed by the automatic control of process computer
Pressure adjustment.Process computer obtains the plate thickness and board width phase with the steel plate 2 by continuous annealing furnace 106 from database etc.
The information of pass, and the pressure based on the cooling gas flowed in lateral 30 detected by pressure gauge 93, to adjust stream
Thus the aperture of amount adjustment valve 92 carries out the pressure adjustment of cooling gas corresponding with the condition of the plate thickness of steel plate 2 and board width.
Moreover, for example, plate thickness is 0.21 [mm] or more and board width is the feelings of 800 [mm] relationships below meeting as condition 1
Under condition, the pressure of cooling gas is set as 1.4 [kPa].In addition, meet as condition 2 plate thickness be 0.23 [mm] or more and
In the case that board width is 830 [mm] relationships below, the pressure of cooling gas is set as 1.7 [kPa].In addition, as item
Part 3 and to meet plate thickness be 0.30 [mm] or more and in the case that board width is 860 [mm] relationships below, by the pressure of cooling gas
Power is set as 1.7 [kPa].
In the continuous annealing furnace 106 involved in embodiment, the block valve 91 for being set to lateral 30 being capable of basis
The control of process computer and be automatically opened and closed.Moreover, process computer make thick and narrow width steel plate 2 by continuously moving back
When stove 106, block valve 91 is set as opening state, by a part of the recyclegas of preheating zone 106a via lateral 30
It is sent into the chamber 81 for being set to heating tape 106b, and is blown cooling gas from chamber 81 to the axial ends portion of furnace roller 16 to carry out
It is cooling.On the other hand, process computer will be truncated when the steel plate 2 other than keeping thick and width narrow is by continuous annealing furnace 106
Valve 91 is set as closed state, and the recyclegas for flowing into the preheating zone 106a of lateral 30 is not admitted to chamber 81, thus
So that being blown cooling gas to the axial ends portion of furnace roller 16 not from chamber 81.Thereby, it is possible to make thick and narrow width steel
Plate 2 inhibits wriggling when being annealed by continuous annealing furnace 106, and the thin and wide wider steel plate 2 of degree can be kept logical
It crosses and bending (turn round and twist) is inhibited to occur when continuous annealing furnace 106 is annealed.
Fig. 7 (a) is indicated without using furnace roller cooling device 80 come figure the case where conveying leading steel plate 2.Fig. 7 (b) is
It goes after indicating the steel plate 2 for keeping width wider than the width of leading steel plate 2 come figure the case where conveying.
It, will be respectively wound in the steel plate 2 for unreeling disk 101a, 101b by bonding machine 102 in continuous annealing line 100
The front end welding of the steel plate 2 of the rear end and rear row of leading steel plate 2 is to link and pass through, but at this point, there are leading steel plates 2
With the different situation such as material, the size of steel plate 2 of rear row.Moreover, the combination of the steel plate 2 using leading steel plate 2 and rear row,
As shown in Fig. 7 (a), even if not using furnace roller cooling device 80 to leading steel plate 2, it will not occur by the roll thermal crown of furnace roller 16
Caused by wriggle, but as shown in Fig. 7 (b), if board width of the board width of the steel plate 2 of rear row relative to leading steel plate 2
Broadening amount is greater than specified amount, does not use furnace roller cooling device 80 to the steel plate 2 of rear row if then existing, afterwards capable steel plate 2 due to
The roll thermal crown of furnace roller 16 and the case where wriggle.In this case, after the steel plate 2 of row passes through after starting to make certainly, even if passing through
Furnace roller cooling device 80 starts to cool down the axial ends portion of furnace roller 16, reduces the temperature in the axial ends portion of furnace roller 16
Need to spend the time, therefore until the steel plate of rear row 2 by until continuous annealing furnace 106, the axial ends portion of furnace roller 16 it is cold
But it may also have little time to reach and roll thermal crown can be reduced to the temperature that can inhibit the degree wriggled.
Therefore, in the continuous annealing line 100 involved in embodiment, process computer monitors leading steel plate 2 with after
The capable respective board width of steel plate 2, rear row steel plate 2 board width relative to leading steel plate 2 board width broadening amount
When greater than specified amount, before the steel plate 2 of row passes through after starting to make, start to be carried out by furnace roller cooling device 80 to furnace roller 16
The cooling in axial ends portion.That is, before the steel plate 2 of row passes through after starting to make, open leading steel plate 2 by when close
Block valve 91, to be blown cooling gas to the axial ends portion of furnace roller 16 from chamber 81 and begin to cool.Thereby, it is possible to rear
Before capable steel plate 2 passes through continuous annealing furnace 106, have enough time making the cooling in the axial ends portion of furnace roller 16 reach can will heat it is convex
Degree is reduced to the temperature that can inhibit the degree wriggled.Thus, it is possible to inhibit in the board width of the steel plate 2 of rear row relative to leading
Steel plate 2 board width broadening amount be greater than specified amount in the case where it is issuable after row steel plate 2 wriggling.Industry is practical
Property
In accordance with the invention it is possible to which the deterioration of energy efficiency can either be inhibited by providing one kind, and it is able to suppress the wriggling of steel plate
Continuous annealing furnace.
Description of symbols
2... steel plate；3... thermometer；10... fan；16... furnace roller；20... circulating line；30... lateral；
31... distribution pipe；40... heat exchanger；50... chamber；60... radiant tube；70... heat shield panel；80... the cooling dress of furnace roller
It sets；81... chamber；81a... jet port；81b... jet port；91... block valve；92... flow rate regulating valve；93... pressure
Meter；100... continuous annealing line；101a... unreels disk；101b... unreels disk；102... bonding machine；103... cleaning equipment；
104... stretch flattener；105... entrance side binding-off machine；106... continuous annealing furnace；106a... preheating zone；106b... plus
The torrid zone；106c... soaking zone；106d... cooling zone；107... water quenching equipment；108... outlet side binding-off machine；109... pressure regulation
Mill；110... trimmer；111... oil feeder；112... shearing machine；113a... tension reel；113b... tension reel.
Claims (5)
1. a kind of continuous annealing furnace is the continuous annealing furnace for having the steel plate of preheating zone, heating tape, soaking zone and cooling zone,
It is characterized in that,
With cooling unit, the cooling unit is blown cooling gas to the axial ends portion for the furnace roller for being set to the heating tape
It is cooled down,
The cooling unit uses the atmosphere gas of the preheating zone as the cooling gas.
2. continuous annealing furnace according to claim 1, which is characterized in that
The preheating zone and the heating tape are connected to via the preheating zone and the interconnecting part of the heating tape is connected,
Steel plate is conveyed from the preheating zone to the heating tape by the interconnecting part,
The cooling gas is blown to the axial ends portion of the furnace roller by the cooling unit, thus the heating tape
Atmosphere gas flows into the preheating zone via the interconnecting part.
3. continuous annealing furnace according to claim 1 or 2, which is characterized in that
There is the circulatory system by fan, pipeline and heat exchanger composition in the preheating zone, which utilizes to come from and set
It is placed in the heat of the burning waste gas of the radiant tube of the heating tape, and the atmosphere gas body circulation for making the preheating zone,
The cooling unit uses the atmosphere gas from the pipe branch as the cooling gas.
4. continuous annealing furnace described in any one of claim 1 to 3, which is characterized in that
With control unit, whether described control unit is according to the plate thickness and board width of the steel plate, to executing by the cooling
The cooling in the axial ends portion for the furnace roller that unit carries out is controlled.
5. continuous annealing furnace according to claim 4, which is characterized in that
When the broadening amount of the board width for the steel plate that the board width relative to leading steel plate is then gone is greater than specified amount, starting
After conveying before the steel plate of row, start the cooling in the axial ends portion of the furnace roller carried out by the cooling unit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-017251 | 2017-02-02 | ||
| JP2017017251 | 2017-02-02 | ||
| PCT/JP2018/001002 WO2018142918A1 (en) | 2017-02-02 | 2018-01-16 | Continuous annealing furnace |
Publications (1)
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| CN110234775A true CN110234775A (en) | 2019-09-13 |
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| JP (1) | JP6369660B1 (en) |
| KR (1) | KR102304637B1 (en) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111996361A (en) * | 2020-09-08 | 2020-11-27 | 白建生 | Annealing furnace for enameled wire production |
| CN112301201A (en) * | 2020-09-27 | 2021-02-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Continuous annealing furnace and method for continuous solution treatment of medium plate by using same |
| CN112813250A (en) * | 2021-01-04 | 2021-05-18 | 宝钢湛江钢铁有限公司 | Water-cooled temperature control device and method for furnace top roller chamber of direct-fired furnace |
| CN112853083A (en) * | 2021-01-04 | 2021-05-28 | 宝钢湛江钢铁有限公司 | Air cooling type temperature control device and method for furnace top roller chamber of direct-fired furnace |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184555B (en) * | 2019-06-22 | 2021-02-19 | 浙江东南新材科技有限公司 | Alloying process of hot galvanizing layer and alloying furnace |
| KR102236621B1 (en) * | 2019-09-30 | 2021-04-08 | 주식회사 삼우에코 | Steel plate continuous heat treatment system to establish heat treatment conditions |
| CN111996360B (en) * | 2020-09-25 | 2022-05-13 | 张家港扬子江冷轧板有限公司 | Automatic deviation prevention device and method for furnace roller of annealing furnace |
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- 2018-01-16 WO PCT/JP2018/001002 patent/WO2018142918A1/en active Application Filing
- 2018-01-16 KR KR1020197021783A patent/KR102304637B1/en active IP Right Grant
- 2018-01-16 CN CN201880009466.4A patent/CN110234775A/en active Pending
- 2018-01-16 JP JP2018518675A patent/JP6369660B1/en active Active
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| JPS57126909A (en) * | 1981-01-31 | 1982-08-06 | Chugai Ro Kogyo Kaisha Ltd | Continuous annealing furnace |
| JPH07331336A (en) * | 1994-06-03 | 1995-12-19 | Nkk Corp | Device for adjusting roll crown rate in heating furnace |
| JP2002285235A (en) * | 2001-03-28 | 2002-10-03 | Nisshin Steel Co Ltd | Vertical type continuous annealing apparatus |
| CN201952463U (en) * | 2010-12-17 | 2011-08-31 | 无锡市新科冶金设备有限公司 | Thermal treatment furnace for steel wire continuous heating and cooling cyclic utilization |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111996361A (en) * | 2020-09-08 | 2020-11-27 | 白建生 | Annealing furnace for enameled wire production |
| CN112301201A (en) * | 2020-09-27 | 2021-02-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Continuous annealing furnace and method for continuous solution treatment of medium plate by using same |
| CN112813250A (en) * | 2021-01-04 | 2021-05-18 | 宝钢湛江钢铁有限公司 | Water-cooled temperature control device and method for furnace top roller chamber of direct-fired furnace |
| CN112853083A (en) * | 2021-01-04 | 2021-05-28 | 宝钢湛江钢铁有限公司 | Air cooling type temperature control device and method for furnace top roller chamber of direct-fired furnace |
Also Published As
| Publication number | Publication date |
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| KR102304637B1 (en) | 2021-09-23 |
| JP6369660B1 (en) | 2018-08-08 |
| KR20190096422A (en) | 2019-08-19 |
| JPWO2018142918A1 (en) | 2019-02-14 |
| WO2018142918A1 (en) | 2018-08-09 |
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