CN110218857A - Oxidation tint strip annealing decoloration device and oxidation tint strip annealing discoloration method - Google Patents
Oxidation tint strip annealing decoloration device and oxidation tint strip annealing discoloration method Download PDFInfo
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- CN110218857A CN110218857A CN201910549339.XA CN201910549339A CN110218857A CN 110218857 A CN110218857 A CN 110218857A CN 201910549339 A CN201910549339 A CN 201910549339A CN 110218857 A CN110218857 A CN 110218857A
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/76—Adjusting the composition of the atmosphere
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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
- C21D11/00—Process control or regulation for heat treatments
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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
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
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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
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- Engineering & Computer Science (AREA)
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- 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
The present invention provides a kind of oxidation tint strip annealing decoloration device applied to metallurgical industry production technical field, the invention further relates to oxidation tint strip annealing discoloration methods, annealing decoloration furnace body (1) of the oxidation tint strip annealing decoloration device includes furnace body rapid cooling section (10), the nitrogen hydrogen mixeding gas transfer pipeline (11) of nitrogen hydrogen hybrid station (2) extends to furnace body rapid cooling section (10), multiple hydrogen supplies branch pipe (15) are set on the second level hydrogen supply pipe (14) being arranged on hydrogen supply line (4), each hydrogen supply branch pipe (15) extends respectively into furnace body rapid cooling section (10), oxidation tint strip annealing decoloration device and oxidation tint strip annealing discoloration method of the present invention, the strip of the surface oxidation color unavoidably generated during convenient and reliable capable of producing to cold rolled continuous annealing is annealed de- Color processing avoids band from wasting so that unqualified belt steel product surface quality and mechanical performance are qualified, effectively realization cost efficiency.
Description
Technical field
The invention belongs to metallurgical industry production technical fields, are that be related to a kind of annealing of oxidation tint strip de- more specifically
Color device, the invention further relates to oxidation tint strip annealing discoloration methods.
Background technique
In cold rolled continuous annealing production, the strip of the strip, restarting production shut down by blow-on maintenance, handling failure,
Because oxygen content is high in furnace, belt steel surface is oxidized, and oxidation tint is presented；There are also slightly leaking into gas (oxygen) in furnace, leaking into water, in height
Under the conditions of temperature, belt steel surface is oxidized presentation oxidation tint.It is longer including some standing times, the coil of strip of surface oxidation.These oxygen
Changing colour band steel is waste product, usually makees steel scrap processing.This has resulted in the waste of belt steel material.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the deficiencies of the prior art, it is simple to provide a kind of structure, Neng Goufang
The strip annealing decolorization to the surface oxidation color unavoidably generated during cold rolled continuous annealing production can be leaned on, so that not
Qualified belt steel product surface quality and mechanical performance are qualified, and band is avoided to waste, and realize the oxidation tint strip annealing of cost efficiency
Decoloration device.
Solve the problems, such as techniques discussed above, the technical scheme adopted by the invention is as follows:
The present invention is a kind of oxidation tint strip annealing decoloration device, and the oxidation tint strip annealing decoloration device includes moving back
Fire decoloration furnace body, nitrogen hydrogen hybrid station, the nitrogen supply (NS) pipeline and hydrogen supply line are connected to nitrogen hydrogen hybrid station respectively, move back
Upper furnace roller and lower furnace roller are set in fire decoloration furnace body, the strip to be processed into furnace body entrance is configured to successively around lower furnace
The structure outside furnace body outlet is extended to after roller and upper furnace roller, annealing decoloration furnace body includes furnace body rapid cooling section, nitrogen hydrogen hybrid station
Nitrogen hydrogen mixeding gas transfer pipeline extends to the annealing decoloration intracorporal furnace body rapid cooling section of furnace, and setting is multiple outside annealing decoloration furnace body
Multiple bellows are arranged in blower, furnace body rapid cooling intersegmental part, and second level hydrogen supply pipe, the supply of second level hydrogen are arranged on hydrogen supply line
Multiple hydrogen supply branch pipes are set on pipe, and each hydrogen supply branch pipe extends respectively into furnace body rapid cooling section, each hydrogen supply
One end that branch pipe extends in furnace body rapid cooling section is arranged respectively close to a bellows.
Multiple bellows are arranged in the furnace body rapid cooling intersegmental part of the annealing decoloration furnace body, and each bellows and one are located at annealing
Blower outside decoloration furnace body connects, and is arranged in the furnace body rapid cooling section close to annealing decoloration furnace body side inner wall and sets by gap
Multiple bellows are set, close annealing decoloration furnace body other side inner wall presses the multiple bellows of gap setting in furnace body rapid cooling section.
Into furnace body entrance strip to be processed successively bypass furnace body outlet is passed through after lower furnace roller and upper furnace roller when, by furnace
The strip side to be processed of body rapid cooling section is configured to successively pass through the structure of multiple bellows, by furnace body rapid cooling section wait locate
The reason strip other side is configured to successively pass through the structure of multiple bellows, the multiple heat exchangers of setting in furnace body rapid cooling section.
Furnace atmosphere detector is set in the annealing decoloration furnace body, encephalic atmosphere detector is connect with control unit,
Each blower is connect with control unit respectively, and hydrogen stop valve is arranged on second level hydrogen supply pipe, and hydrogen stop valve is electromagnetism hydrogen
Gas stop valve, hydrogen stop valve are connect with the control unit that can control the opening and closing of hydrogen stop valve.
When the control unit control hydrogen stop valve is opened, hydrogen supply line is configured to through second level hydrogen
Supply pipe and multiple hydrogen supply branch pipe to the structure of furnace body rapid cooling intersegmental part different parts supply hydrogen；Second level hydrogen supply pipe
On also set up hydrogen regulating valve, hydrogen regulating valve is connect with the control unit that can control the adjusting of hydrogen regulating valve opening size.
Nitrogen hydrogen mixeding gas is set on the nitrogen hydrogen mixeding gas transfer pipeline and conveys electromagnetic shut-off valve, nitrogen and hydrogen mixture
Body conveying electromagnetic shut-off valve is connect with control unit；Upper furnace roller is connect with driving motor, upper furnace roller and lower furnace roller by belt or
Chain connection, driving motor are connect with control unit.
Furnace body rapid cooling intersegmental part injection nitrogen hydrogen mixing of the nitrogen hydrogen mixeding gas transfer pipeline to annealing decoloration furnace body
When gas, the control of the portion rate of hydrogen and nitrogen is between 1:18-1:21 range in nitrogen hydrogen mixeding gas.
The furnace atmosphere detector is configured to the furnace body rapid cooling intersegmental part oxygen of real-time detection annealing decoloration furnace body
The hydrogen content of the structure of content, hydrogen content and dew point numerical value, furnace atmosphere detector test furnace body rapid cooling intersegmental part reaches 8%-
When 10%, control unit is configured to the structure that control hydrogen regulating valve aperture is in stationary state.
When the furnace body rapid cooling intersegmental part hydrogen content of the furnace atmosphere detector test annealing decoloration furnace body is less than 8%,
Control unit is configured to the structure that the aperture of control hydrogen regulating valve increases, furnace atmosphere detector test annealing decoloration furnace
When the furnace body rapid cooling intersegmental part hydrogen content of body 1 is greater than 10%, the aperture that control unit is configured to control hydrogen regulating valve subtracts
Small structure.
The invention further relates to a kind of step is simple, can unavoidably be produced during the convenient and reliable production to cold rolled continuous annealing
The strip annealing decolorization of raw surface oxidation color is kept away so that unqualified belt steel product surface quality and mechanical performance are qualified
Exempt from band waste, realizes cost efficiency oxidation tint strip annealing discoloration method.
The annealing decolorization process of the oxidation tint strip annealing discoloration method are as follows: 1) control unit 16 controls hydrogen cutting
Valve 17 is opened, and control nitrogen hydrogen mixeding gas transfer pipeline 11 is opened, and starts blower 12, and starting motor drives upper furnace roller 5 and lower furnace
Roller 6 rotates, and the strip to be processed 8 into furnace body entrance 7 continues successively to go out around extending to furnace body after lower furnace roller 6 and upper furnace roller 5
Mouth 9；2) multiple hydrogen that control unit 16 controls second level hydrogen supply pipe 14 supply furnace body of the branch pipe 15 to annealing decoloration furnace body 1
10 inside different parts of rapid cooling section injection hydrogen, the hydrogen treat processing progress reduction-decolor of strip 8, and nitrogen hydrogen mixeding gas simultaneously
Transfer pipeline 11 is to nitrogen hydrogen mixeding gas is injected inside the furnace body rapid cooling section 10 of annealing decoloration furnace body 1, and protection is by annealing decoloration
The strip to be processed 8 of furnace body 1 is not oxidized, while carrying out strip reduction to be processed；3) furnace atmosphere detector 19 detects furnace body
When hydrogen content inside rapid cooling section 10 reaches 8%-10%, control unit 16 controls 20 aperture of hydrogen regulating valve and is in fixing shape
State；4) when 10 internal hydrogen content of furnace body rapid cooling section of the detection of furnace atmosphere detector 19 annealing decoloration furnace body 1 is less than 8%, control
The aperture that component 16 controls hydrogen regulating valve 20 increases, the furnace body rapid cooling of the detection annealing decoloration furnace body 1 of furnace atmosphere detector 19
When 10 internal hydrogen contents of section are greater than 10%, the aperture that control unit 16 controls hydrogen regulating valve 20 reduces；5) continue above-mentioned steps,
Strip 8 to be processed can be completed in batches carries out decoloration reduction treatment.
Using technical solution of the present invention, can obtain it is below the utility model has the advantages that
Oxidation tint strip annealing decoloration device and oxidation tint strip annealing discoloration method of the present invention, in existing equipment
On the basis of, the rapid cooling section equipment of annealing furnace is transformed, annealing decoloration furnace body is formed and realizes associated components cooperation, this
Sample, unqualified oxidation tint strip concentration is online, when strip to be processed passes through from the furnace body rapid cooling section of annealing decoloration furnace body, Eng energy
Enough reliable realization annealing decolorizations, make belt steel surface iron oxide reduction-decolor Cheng Tie under the high hydrogen condition of high temperature, become qualified
Product.The annealing decolorization process of the oxidation tint strip annealing discoloration method are as follows: control unit controls hydrogen stop valve and opens, control
Nitrogen hydrogen mixeding gas transfer pipeline processed is opened, and blower is started, and starting motor drives upper furnace roller and the rotation of lower furnace roller, enters into furnace body
The strip to be processed of mouth continues to extend to furnace body outlet after successively bypassing lower furnace roller and upper furnace roller；Control unit controls second level hydrogen
Multiple hydrogen of supply pipe supply branch pipe and inject hydrogen, hydrogen pair to the furnace body rapid cooling intersegmental part different parts of annealing decoloration furnace body
Strip to be processed carries out reduction-decolor, and nitrogen hydrogen mixeding gas transfer pipeline is into the furnace body rapid cooling section of annealing decoloration furnace body simultaneously
Nitrogen hydrogen mixeding gas is injected in portion, and protection is not oxidized by the strip to be processed of annealing decoloration furnace body, while carrying out band to be processed
Steel reduction；When the hydrogen content of furnace atmosphere detector test furnace body rapid cooling intersegmental part reaches 8%-10%, control unit controls hydrogen
Gas control valve opening is in stationary state；The furnace body rapid cooling intersegmental part hydrogen content of furnace atmosphere detector test annealing decoloration furnace body
When less than 8%, the aperture that control unit controls hydrogen regulating valve increases, the furnace of furnace atmosphere detector test annealing decoloration furnace body
When body rapid cooling intersegmental part hydrogen content is greater than 10%, the aperture that control unit controls hydrogen regulating valve reduces；Continue above-mentioned steps, energy
Enough completing strip to be processed in batches carries out decoloration reduction treatment.Oxidation tint strip annealing decoloration device of the present invention and oxidation
Colour band steel annealing discoloration method, apparatus structure is simple, and method and step is simple, can be convenient and reliable to cold rolled continuous annealing production period
Between unavoidably generate surface oxidation color strip annealing decolorization so that unqualified belt steel product surface quality and machinery
Performance is qualified, and band is avoided to waste, effectively realization cost efficiency.
Detailed description of the invention
Brief description is made to content expressed by each attached drawing of this specification and the label in figure below:
Fig. 1 is the structural schematic diagram of oxidation tint strip of the present invention annealing decoloration device；
Attached drawing acceptance of the bid note is respectively as follows: 1, annealing decoloration furnace body；2, nitrogen hydrogen hybrid station；3, nitrogen supply (NS) pipeline；4, hydrogen supplies
Answer pipeline；5, upper furnace roller；6, lower furnace roller；7, furnace body entrance；8, strip to be processed；9, furnace body exports；10, furnace body rapid cooling section；11,
Nitrogen hydrogen mixeding gas transfer pipeline；12, blower；13, bellows；14, second level hydrogen supply pipe；15, hydrogen supplies branch pipe；16, it controls
Component processed；17, hydrogen stop valve；18, heat exchanger；19, furnace atmosphere detector；20, hydrogen regulating valve；21, nitrogen and hydrogen mixture
Body conveys electromagnetic shut-off valve；22, waste gas spreading valve in furnace.
Specific embodiment
Below against attached drawing, by the description of the embodiment, to for example related each structure of a specific embodiment of the invention
The works such as the shape of part, construction, the mutual alignment between each section and connection relationship, the effect of each section and working principle are further
Detailed description:
As shown in Fig. 1, the present invention is a kind of oxidation tint strip annealing decoloration device, and the oxidation tint strip annealing is de-
Color device includes annealing decoloration furnace body 1, nitrogen hydrogen hybrid station 2, the nitrogen supply (NS) pipeline 3 and hydrogen supply line 4 respectively with
Nitrogen hydrogen hybrid station 2 is connected to, and upper furnace roller 5 and lower furnace roller 6 is arranged in annealing decoloration furnace body 1, into the strip to be processed of furnace body entrance 7
8 are configured to successively around the structure extended to outside furnace body outlet 9 after lower furnace roller 6 and upper furnace roller 5, annealing decoloration furnace body 1
Including furnace body rapid cooling section 10, the nitrogen hydrogen mixeding gas transfer pipeline 11 of nitrogen hydrogen hybrid station 2 extends to the furnace in annealing decoloration furnace body 1
Body rapid cooling section 10, annealing decolourize that multiple blowers 12 are arranged outside furnace body 1, and multiple bellows 13, hydrogen are arranged inside furnace body rapid cooling section 10
Second level hydrogen supply pipe 14 is set on gas supply line 4, multiple hydrogen supply branch pipes 15 are set on second level hydrogen supply pipe 14, often
A hydrogen supply branch pipe 15 extends respectively into furnace body rapid cooling section 10, and each hydrogen supply branch pipe 15 extends to furnace body rapid cooling section 10
Interior one end is arranged respectively close to a bellows 13.Above structure sets the rapid cooling section of annealing furnace on the basis of existing equipment
It is standby to be transformed, annealing decoloration furnace body 1 is formed, in this way, oxidation tint strip concentration is online, strip 8 to be processed decolourizes from annealing
When the furnace body rapid cooling section 10 of furnace body 1 is passed through, Eng can reliably realize annealing decolorization, make belt steel surface iron oxide in high temperature height
Reduction-decolor Cheng Tie under hydrogen condition, becomes qualified product.The annealing decolorization process of the oxidation tint strip annealing discoloration method are as follows:
Control unit 16 controls hydrogen stop valve 17 and opens, and control nitrogen hydrogen mixeding gas transfer pipeline 11 is opened, and starts blower 12, starting
Motor drives upper furnace roller 5 and the rotation of lower furnace roller 6, and the strip to be processed 8 into furnace body entrance 7 continues successively around lower 6 He of furnace roller
Furnace body outlet 9 is extended to after upper furnace roller 5；Control unit 16 control second level hydrogen supply pipe 14 multiple hydrogen supply branch pipe 15 to
The 10 inside different parts of furnace body rapid cooling section of annealing decoloration furnace body 1 inject hydrogen, and it is de- that hydrogen treat processing strip 8 carries out reduction
Color, and nitrogen hydrogen mixeding gas transfer pipeline 11 is mixed to injection nitrogen hydrogen inside the furnace body rapid cooling section 10 of annealing decoloration furnace body 1 simultaneously
Gas, protection is not oxidized by the strip to be processed 8 of annealing decoloration furnace body 1, while carrying out strip reduction to be processed；Gas in furnace
When the hydrogen content that atmosphere detector 19 detects inside furnace body rapid cooling section 10 reaches 8%-10%, control unit 16 controls hydrogen regulating valve
20 apertures are in stationary state；10 internal hydrogen content of furnace body rapid cooling section of the detection annealing decoloration furnace body 1 of furnace atmosphere detector 19
When less than 8%, the aperture that control unit 16 controls hydrogen regulating valve 20 increases, the detection annealing decoloration furnace of furnace atmosphere detector 19
When 10 internal hydrogen content of furnace body rapid cooling section of body 1 is greater than 10%, the aperture that control unit 16 controls hydrogen regulating valve 20 reduces；It holds
Continuous above-mentioned steps, can complete strip 8 to be processed in batches and carry out decoloration reduction treatment.Oxidation tint strip annealing of the present invention
Decoloration device and oxidation tint strip annealing discoloration method, apparatus structure is simple, and method and step is simple, can be convenient and reliable to cold rolling
The strip annealing decolorization for the surface oxidation color that continuous annealing unavoidably generates during producing, so that unqualified belt steel product
Surface quality and mechanical performance are qualified, and band is avoided to waste, effectively realization cost efficiency.
Multiple bellows 13 are set inside the furnace body rapid cooling section 10 of the described annealing decoloration furnace body 1, each bellows 13 and one
Blower 12 outside annealing decoloration furnace body 1 connects, in the furnace body rapid cooling section 10 in annealing decoloration 1 side of furnace body
The multiple bellows 13 of gap setting are pressed in wall setting, are set close to annealing decoloration 1 other side inner wall of furnace body by gap in furnace body rapid cooling section 10
Set multiple bellows 13.Strip to be processed 8 into furnace body entrance 7 successively exports around passing through furnace body after lower furnace roller 6 and upper furnace roller 5
When 9,8 side of strip to be processed by furnace body rapid cooling section 10 is configured to successively pass through the structure of multiple bellows 13, passes through
8 other side of strip to be processed of furnace body rapid cooling section 10 is configured to successively pass through the structure of multiple bellows 13, furnace body rapid cooling section
The multiple heat exchangers 18 of setting in 10.Above structure, strip to be processed is continuously by annealing decoloration furnace body 1, to be processed
Strip is when by bellows, the cold wind being sent by blower into bellows, realizes that strip is cooling, and at this point, second level hydrogen is supplied
The hydrogen that multiple hydrogen supply branch pipe 15 of pipe 14 conveys acts on belt steel surface, realizes that the annealing of belt steel surface to be processed is de-
Color avoids wasting to convert qualified band for unqualified band.
Furnace atmosphere detector 19, encephalic atmosphere detector 19 and control unit are set in the annealing decoloration furnace body 1
16 connections, each blower 12 are connect with control unit 16 respectively, and hydrogen stop valve 17, hydrogen are arranged on second level hydrogen supply pipe 14
Stop valve 17 is electromagnetism hydrogen stop valve, and hydrogen stop valve 17 connects with the control unit 16 that can control the opening and closing of hydrogen stop valve 17
It connects.Above structure can carry out the hydrogen content in annealing decoloration furnace body 1 real-time by the setting of furnace atmosphere detector 19
Monitoring avoids hydrogen content accounting excess or accounting insufficient.Ensuring strip to be processed can anneal decoloration under the best conditions, realize
Waste product qualification.
When the control unit 16 controls the opening of hydrogen stop valve 17, hydrogen supply line 4 is configured to by two
Grade hydrogen supply pipe 14 and multiple hydrogen supply branch pipe 15 to the structure of 10 inside different parts of furnace body rapid cooling section supply hydrogen；Two
It also sets up hydrogen regulating valve 20 on grade hydrogen supply pipe 14, hydrogen regulating valve 20 and 20 opening size of hydrogen regulating valve can be controlled
The control unit 16 of adjusting connects.Above structure, hydrogen regulating valve 20 and furnace atmosphere detector 19 connect with control unit respectively
It connects, is fitted to each other, real time monitoring adjusts hydrogen supply.
Nitrogen hydrogen mixeding gas is set on the nitrogen hydrogen mixeding gas transfer pipeline 11 and conveys electromagnetic shut-off valve 21, nitrogen hydrogen is mixed
Gas conveying electromagnetic shut-off valve 21 is closed to connect with control unit 16；Upper furnace roller 5 is connect with driving motor, upper furnace roller 5 and lower furnace roller 6
It is connected by belt or chain, driving motor is connect with control unit 16.Above structure, nitrogen hydrogen mixeding gas convey electromagnetism cutting
Valve 21 can realize the supply and stopping of nitrogen hydrogen mixeding gas under control unit control.And nitrogen delivery pipe road and hydrogen input
Pipeline is supplied respectively after gas enters nitrogen hydrogen hybrid station, then the mixed gas that the ratio that can be equipped with out is met the requirements mixes
Gas is input in annealing decoloration furnace body 1.The mixed gas protected intracorporal strip of furnace is not oxidized, and has reducing power.
The nitrogen hydrogen mixeding gas transfer pipeline 11 to annealing decoloration furnace body 1 furnace body rapid cooling section 10 inside inject nitrogen hydrogen
When mixed gas, the control of the portion rate of hydrogen and nitrogen is between 1:18-1:21 range in nitrogen hydrogen mixeding gas.The furnace atmosphere
Detector 19 is configured to 10 inside oxygen content of furnace body rapid cooling section, hydrogen content and the dew point of real-time detection annealing decoloration furnace body 1
The structure of numerical value, when the hydrogen content that furnace atmosphere detector 19 detects inside furnace body rapid cooling section 10 reaches 8%-10%, control unit
Part 16 is configured to the structure that control 20 aperture of hydrogen regulating valve is in stationary state.In this way, effectively realizing the supply of hydrogen
And the control and adjusting of content.
10 internal hydrogen content of furnace body rapid cooling section of the detection annealing decoloration furnace body 1 of furnace atmosphere detector 19 is less than
When 8%, control unit 16 is configured to the structure that the aperture of control hydrogen regulating valve 20 increases, and furnace atmosphere detector 19 is examined
When surveying 10 internal hydrogen content of furnace body rapid cooling section of annealing decoloration furnace body 1 greater than 10%, control unit 16 is configured to control hydrogen
The structure that the aperture of gas regulating valve 20 reduces.Above structure, so that hydrogen content is controlled in real time.So that hydrogen content begins
Eventually in the content proportion for meeting annealing decolorization requirement.
The invention further relates to a kind of step is simple, can unavoidably be produced during the convenient and reliable production to cold rolled continuous annealing
The strip annealing decolorization of raw surface oxidation color is kept away so that unqualified belt steel product surface quality and mechanical performance are qualified
Exempt from band waste, realizes that cost efficiency obtains oxidation tint strip annealing discoloration method.
The annealing decolorization process of the oxidation tint strip annealing discoloration method are as follows: 1) control unit 16 controls hydrogen cutting
Valve 17 is opened, and control nitrogen hydrogen mixeding gas transfer pipeline 11 is opened, and starts blower 12, and starting motor drives upper furnace roller 5 and lower furnace
Roller 6 rotates, and the strip to be processed 8 into furnace body entrance 7 continues successively to go out around extending to furnace body after lower furnace roller 6 and upper furnace roller 5
Mouth 9；2) multiple hydrogen that control unit 16 controls second level hydrogen supply pipe 14 supply furnace body of the branch pipe 15 to annealing decoloration furnace body 1
10 inside different parts of rapid cooling section injection hydrogen, the hydrogen treat processing progress reduction-decolor of strip 8, and nitrogen hydrogen mixeding gas simultaneously
Transfer pipeline 11 is to nitrogen hydrogen mixeding gas is injected inside the furnace body rapid cooling section 10 of annealing decoloration furnace body 1, and protection is by annealing decoloration
The strip to be processed 8 of furnace body 1 is not oxidized, while carrying out strip reduction to be processed；3) furnace atmosphere detector 19 detects furnace body
When hydrogen content inside rapid cooling section 10 reaches 8%-10%, control unit 16 controls 20 aperture of hydrogen regulating valve and is in fixing shape
State；4) when 10 internal hydrogen content of furnace body rapid cooling section of the detection of furnace atmosphere detector 19 annealing decoloration furnace body 1 is less than 8%, control
The aperture that component 16 controls hydrogen regulating valve 20 increases, the furnace body rapid cooling of the detection annealing decoloration furnace body 1 of furnace atmosphere detector 19
When 10 internal hydrogen contents of section are greater than 10%, the aperture that control unit 16 controls hydrogen regulating valve 20 reduces；5) continue above-mentioned steps,
Strip 8 to be processed can be completed in batches carries out decoloration reduction treatment.
In oxidation tint strip annealing decoloration device of the present invention, nitrogen hydrogen hybrid station: conventional is that hydrogen is added in nitrogen,
Each section of stove of injection, protection strip is not oxidized in furnace, and has general reducing power.Hydrogen stop valve, hydrogen flowing quantity
Meter, hydrogen regulating valve and second level hydrogen supply pipe 14 and hydrogen supply branch pipe: the high hydrogen that metering is adjusted supplies branch by hydrogen
Pipe is sent to blower output air duct position, to carry out reduction-decolor to oxidation strip than conventional higher hydrogen concentration.Furnace atmosphere inspection
Survey instrument: Real-time and Dynamic Detection furnace atmosphere data, including oxygen content, hydrogen content and dew point (water content) numerical value.Rapid cooling section is infused
Enter Gao Qing, when Gao Qing reaches 8%~10% in rapid cooling section furnace, furnace atmosphere detector is to control unit feedback signal, control unit
Part controls hydrogen regulating valve and maintains balance, the system alarm as oxygen content 30ppm in rapid cooling section furnace, and when oxygen content 50ppm stops
Rapid cooling section injects Gao Qing.Waste gas spreading valve in furnace: the oxygen in oxidation tint belt steel surface iron oxide replaces production water by hydrogen, such as following
Formula:
When water content reaches a certain amount, -20 DEG C of dew point or more, belt steel surface is again by water oxygen.So when detecting dew
- 25 DEG C or more of point, signal control increase diffusion valve opening degree.
The overall process of oxidation tint strip annealing discoloration method of the invention are as follows: 1, strip is online enters cleaning section, cleaning section
The speed of service reduces by 20%, to increase cleaning effect；2, strip enters annealing decoloration furnace body 1, and the stove speed of service reduces by 20%,
To increase the time of contact of belt steel surface and hydrogen；3, furnace atmosphere condition: each section of oxygen content 15ppm or less；- 35 DEG C of dew point with
Under；Rapid cooling section, slow cooling section and overaging section furnace gas diffusion valve open 20%；4, after strip enters annealing decoloration furnace body 1, rapid cooling section note
Enter Gao Qing.When the signal control hydrogen regulating valve dimension that Gao Qing reaches 8%~10% hydrogen content in rapid cooling section furnace, and control unit issues
Maintain an equal level weighing apparatus injection.5, it protects: when hydrogen high in rapid cooling section furnace detection reaches 15% hydrogen content, stopping injection Gao Qing；Oxygen content 50ppm
When stop injection Gao Qing.
Oxidation tint strip annealing decoloration device and oxidation tint strip annealing discoloration method of the present invention, in existing equipment
On the basis of, the rapid cooling section equipment of annealing furnace is transformed, annealing decoloration furnace body is formed and realizes associated components cooperation, this
Sample, unqualified oxidation tint strip concentration is online, when strip to be processed passes through from the furnace body rapid cooling section of annealing decoloration furnace body, Eng energy
Enough reliable realization annealing decolorizations, make belt steel surface iron oxide reduction-decolor Cheng Tie under the high hydrogen condition of high temperature, become qualified
Product.The annealing decolorization process of the oxidation tint strip annealing discoloration method are as follows: control unit controls hydrogen stop valve and opens, control
Nitrogen hydrogen mixeding gas transfer pipeline processed is opened, and blower is started, and starting motor drives upper furnace roller and the rotation of lower furnace roller, enters into furnace body
The strip to be processed of mouth continues to extend to furnace body outlet after successively bypassing lower furnace roller and upper furnace roller；Control unit controls second level hydrogen
Multiple hydrogen of supply pipe supply branch pipe and inject hydrogen, hydrogen pair to the furnace body rapid cooling intersegmental part different parts of annealing decoloration furnace body
Strip to be processed carries out reduction-decolor, and nitrogen hydrogen mixeding gas transfer pipeline is into the furnace body rapid cooling section of annealing decoloration furnace body simultaneously
Nitrogen hydrogen mixeding gas is injected in portion, and protection is not oxidized by the strip to be processed of annealing decoloration furnace body, while carrying out band to be processed
Steel reduction；When the hydrogen content of furnace atmosphere detector test furnace body rapid cooling intersegmental part reaches 8%-10%, control unit controls hydrogen
Gas control valve opening is in stationary state；The furnace body rapid cooling intersegmental part hydrogen content of furnace atmosphere detector test annealing decoloration furnace body
When less than 8%, the aperture that control unit controls hydrogen regulating valve increases, the furnace of furnace atmosphere detector test annealing decoloration furnace body
When body rapid cooling intersegmental part hydrogen content is greater than 10%, the aperture that control unit controls hydrogen regulating valve reduces；Continue above-mentioned steps, energy
Enough completing strip to be processed in batches carries out decoloration reduction treatment.Oxidation tint strip annealing decoloration device of the present invention and oxidation
Colour band steel annealing discoloration method, apparatus structure is simple, and method and step is simple, can be convenient and reliable to cold rolled continuous annealing production period
Between unavoidably generate surface oxidation color strip annealing decolorization so that unqualified belt steel product surface quality and machinery
Performance is qualified, and band is avoided to waste, effectively realization cost efficiency.
Above in conjunction with attached drawing, an exemplary description of the invention, it is clear that concrete implementation of the present invention is not by above-mentioned
The limitation of mode, as long as using the various improvement that the inventive concept and technical scheme of the present invention carry out, or not improved by this
The conception and technical scheme of invention directly apply to other occasions, are within the scope of the invention.
Claims (10)
- The decoloration device 1. a kind of oxidation tint strip is annealed, it is characterised in that: the oxidation tint strip annealing decoloration device includes Annealing decoloration furnace body (1), nitrogen hydrogen hybrid station (2), the nitrogen supply (NS) pipeline (3) and hydrogen supply line (4) respectively with nitrogen Upper furnace roller (5) and lower furnace roller (6) is arranged in annealing decoloration furnace body (1) in hydrogen hybrid station (2) connection, into furnace body entrance (7) to Processing strip (8) is configured to successively around the knot for extending to furnace body outlet (9) outside behind lower furnace roller (6) and upper furnace roller (5) Structure, annealing decoloration furnace body (1) includes furnace body rapid cooling section (10), the nitrogen hydrogen mixeding gas transfer pipeline (11) of nitrogen hydrogen hybrid station (2) The furnace body rapid cooling section (10) in annealing decoloration furnace body (1) is extended to, multiple blowers (12) are set outside annealing decoloration furnace body (1), Multiple bellows (13) are set inside furnace body rapid cooling section (10), second level hydrogen supply pipe (14) are set on hydrogen supply line (4), two Multiple hydrogen supplies branch pipe (15) are set on grade hydrogen supply pipe (14), and each hydrogen supply branch pipe (15) extends respectively into furnace body In rapid cooling section (10), each hydrogen supply branch pipe (15) extends to one end in furnace body rapid cooling section (10) respectively close to a bellows (13) it is arranged.
- The decoloration device 2. oxidation tint strip according to claim 1 is annealed, it is characterised in that: the annealing decoloration furnace body (1) multiple bellows (13) are set inside furnace body rapid cooling section (10), and each bellows (13) are located at annealing decoloration furnace body (1) with one External blower (12) connects, between close annealing decoloration furnace body (1) side inner wall setting is pressed in the furnace body rapid cooling section (10) Multiple bellows (13) are arranged in gap, and close annealing decoloration furnace body (1) other side inner wall is more by gap setting in furnace body rapid cooling section (10) A bellows (13).
- The decoloration device 3. oxidation tint strip according to claim 1 or 2 is annealed, it is characterised in that: enter furnace body entrance (7) Strip to be processed (8) when successively passing through furnace body afterwards around lower furnace roller (6) and upper furnace roller (5) and exporting (9), by furnace body rapid cooling section (10) strip to be processed (8) side is configured to successively pass through the structure of multiple bellows (13), by furnace body rapid cooling section (10) strip to be processed (8) other side is configured to successively pass through the structure of multiple bellows (13), furnace body rapid cooling section (10) The interior multiple heat exchangers (18) of setting.
- The decoloration device 4. oxidation tint strip according to claim 1 or 2 is annealed, it is characterised in that: the annealing decoloration Furnace atmosphere detector (19) are set in furnace body (1), encephalic atmosphere detector (19) is connect with control unit (16), each blower (12) it is connect respectively with control unit (16), hydrogen stop valve (17) is set on second level hydrogen supply pipe (14), hydrogen stop valve It (17) is electromagnetism hydrogen stop valve, hydrogen stop valve (17) and the control unit (16) that hydrogen stop valve (17) opening and closing can be controlled Connection.
- The decoloration device 5. oxidation tint strip according to claim 4 is annealed, it is characterised in that: the control unit (16) When controlling hydrogen stop valve (17) and opening, hydrogen supply line (4) is configured to through second level hydrogen supply pipe (14) and more Structure of a hydrogen supply branch pipe (15) to the internal different parts supply hydrogen of furnace body rapid cooling section (10)；Second level hydrogen supply pipe (14) it is also set up on hydrogen regulating valve (20), hydrogen regulating valve (20) is adjusted with that can control hydrogen regulating valve (20) opening size Control unit (16) connection.
- The decoloration device 6. oxidation tint strip according to claim 1 or 2 is annealed, it is characterised in that: the nitrogen hydrogen mixing Nitrogen hydrogen mixeding gas is set on gas transfer pipeline (11) and conveys electromagnetic shut-off valve (21), nitrogen hydrogen mixeding gas conveys electromagnetism cutting Valve (21) is connect with control unit (16)；Upper furnace roller (5) connect with driving motor, and upper furnace roller (5) and lower furnace roller (6) pass through belt Or chain connection, driving motor are connect with control unit (16).
- The decoloration device 7. oxidation tint strip according to claim 1 or 2 is annealed, it is characterised in that: the nitrogen hydrogen mixing When gas transfer pipeline (11) injects nitrogen hydrogen mixeding gas to furnace body rapid cooling section (10) inside of annealing decoloration furnace body (1), nitrogen hydrogen The control of the portion rate of hydrogen and nitrogen is between 1:18-1:21 range in mixed gas.
- The decoloration device 8. oxidation tint strip according to claim 4 is annealed, it is characterised in that: the furnace atmosphere detection Instrument (19) is configured to the internal oxygen content of furnace body rapid cooling section (10), hydrogen content and the dew of real-time detection annealing decoloration furnace body (1) The structure of point value, when the internal hydrogen content of furnace atmosphere detector (19) detection furnace body rapid cooling section (10) reaches 8%-10%, Control unit (16) is configured to the structure that control hydrogen regulating valve (20) aperture is in stationary state.
- The decoloration device 9. oxidation tint strip according to claim 8 is annealed, it is characterised in that: furnace atmosphere detector (19) When furnace body rapid cooling section (10) internal hydrogen content of detection annealing decoloration furnace body (1) is less than 8%, control unit (16) is configured to Control the structure that the aperture of hydrogen regulating valve (20) increases, the furnace of furnace atmosphere detector (19) detection annealing decoloration furnace body (1) When body rapid cooling section (10) internal hydrogen content is greater than 10%, control unit (16) is configured to opening for control hydrogen regulating valve (20) Spend reduced structure.
- The discoloration method 10. a kind of oxidation tint strip is annealed, it is characterised in that: the oxidation tint strip annealing discoloration method moves back Fiery decolorization process are as follows: 1) control unit (16) control hydrogen stop valve (17) is opened, and controls nitrogen hydrogen mixeding gas transfer pipeline (11) it opens, starts blower (12), starting motor drives upper furnace roller (5) and lower furnace roller (6) rotation, into furnace body entrance (7) Strip (8) to be processed continues to extend to furnace body outlet (9) after successively bypassing lower furnace roller (6) and upper furnace roller (5)；2) control unit (16) multiple hydrogen supply branch pipe (15) of second level hydrogen supply pipe (14) is controlled to the furnace body rapid cooling section of annealing decoloration furnace body (1) (10) internal different parts inject hydrogen, and hydrogen treat handles strip (8) and carries out reduction-decolor, and nitrogen hydrogen mixeding gas is defeated simultaneously Send pipeline (11) to injection nitrogen hydrogen mixeding gas inside the furnace body rapid cooling section (10) of annealing decoloration furnace body (1), protection is by annealing The strip to be processed (8) of decoloration furnace body (1) is not oxidized, while carrying out strip to be processed (8) reduction；3) furnace atmosphere detector (19) when the internal hydrogen content of detection furnace body rapid cooling section (10) reaches 8%-10%, control unit (16) controls hydrogen regulating valve (20) aperture is in stationary state；4) the furnace body rapid cooling section (10) of furnace atmosphere detector (19) detection annealing decoloration furnace body (1) When internal hydrogen content is less than 8%, the aperture that control unit (16) controls hydrogen regulating valve (20) increases, furnace atmosphere detector (19) when furnace body rapid cooling section (10) internal hydrogen content of detection annealing decoloration furnace body (1) is greater than 10%, control unit (16) control The aperture of hydrogen regulating valve (20) reduces；5) continue above-mentioned steps, strip to be processed (8) can be completed in batches and carry out decoloration reduction Processing.
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| CN2178722Y (en) * | 1994-01-27 | 1994-10-05 | 唐山市冷轧镀锌带钢厂 | strip steel continuous bright annealing furnace |
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