CN103147084A - Vertical continuous annealing furnace bluing device and bluing technology thereof - Google Patents
Vertical continuous annealing furnace bluing device and bluing technology thereof Download PDFInfo
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- CN103147084A CN103147084A CN2013100234071A CN201310023407A CN103147084A CN 103147084 A CN103147084 A CN 103147084A CN 2013100234071 A CN2013100234071 A CN 2013100234071A CN 201310023407 A CN201310023407 A CN 201310023407A CN 103147084 A CN103147084 A CN 103147084A
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Abstract
The invention relates to a heat treatment device and heat treatment technology thereof and discloses a vertical continuous annealing furnace bluing device and bluing technology thereof. A bluing medium station is arranged and is communicated with a rapid cooling section, an overaging section and a final cooling section of a hearth through medium pipelines to control opening degree of a control adjusting valve and a relief valve. Oxygen content in the rapid cooling section and/or the overaging section and/or the final cooling section of the hearth is adjusted to be in a range of 0.03%-1.00%. An existing vertical continuous annealing furnace is used and a bluing device is added so that two processes of annealing and bluing of a bluing steel belt are finished by once in the vertical continuous annealing furnace, and therefore device investment and following heat treatment energy consumption are saved; continuous mass production is achieved, production cost is low, performance of a product is stable, surface bluing effect is good and production efficiency is high.
Description
Technical field
The present invention relates to a kind of thermal treatment unit and thermal treatment process thereof, relate in particular to a kind of continuous annealing furnace turn blue device and the technique of turning blue thereof, be specially a kind of vertical continuous annealing furnace turn blue device and the technique of turning blue thereof.
Background technology
In cold-rolled steel strip pickling-rolling-continuous annealing equipment, because vertical continuous annealing furnace takes full advantage of the space, therefore have floor space little, characteristics of compact layout, the thermal treatment amount is large, is convenient to production management, the advantage that production efficiency is high.Because steel band is in the characteristic of the anti-oxidation of annealing operation, therefore only consider to arrange nitrogen (N when vertical continuous annealing furnace designs
2), hydrogen (H
2) the protective gas pipeline, in order to pass into protective gas in stove.In the cold-rolled steel strip product, some steel bands (punching) are surperficial for needs antirust, insulation, the processing of can further turning blue, so that at the surperficial oxide film that forms one deck densification of steel band (punching).Blue steel strip is widely used in packing, building, five metals, electrician trade, as strapping tape, building slab, hardware component, electric machine iron core with siliconized plate etc.The processing of turning blue of steel band (punching) at present is to carry out in the equipment that turns blue of special use or the annealing-equipment that turns blue, and needs to increase facility investment.Patent documentation publication number CN 101082075A " without coating electrical steel annealing with turn blue technique and device " and publication number CN 101871041A " a kind of continuous annealing bluing process of sheet punching work piece of cold rolling silicon steel sheet " special use anneal-the turn blue technique of turning blue of equipment is introduced, weak point that these technique is deposited is: 1) to the deep processed product of steel band--the processing of annealing+turn blue of punching second-heating, and energy consumption is large; 2) complex procedures, the production operation time is long, and production efficiency is low.
Summary of the invention
The object of the invention is to, process and to carry out existing deficiency in the equipment that turns blue of special use or the annealing-equipment that turns blue for turning blue of existing steel band (punching), a kind of vertical continuous annealing furnace turn blue device and the technique of turning blue thereof are provided, the annealing of blue steel strip, two operations of turning blue are once completed in vertical continuous annealing furnace, facility investment and subsequent heat treatment energy consumption have been saved, and quantity-produced steel band stable mechanical performance, the surface quality of turning blue is good, and production efficiency is high.
Can realize purpose of the present invention by following proposal: a kind of vertical continuous annealing furnace device that turns blue; comprise preheating section, heating zone, soaking zone, slow cooling section, fast cold section; overaging section, whole cold section burner hearth; each section upper furnace or bottom are communicated with; each section burner hearth is equipped with diffusion valve and combustion gas analyzer, and the bottom is communicated with the shielding gas station by pipeline, it is characterized in that; turn blue medium station of setting, by medium pipeline with fast cold section, overaging section, cold section burner hearth is communicated with eventually.
Be provided with variable valve in described medium pipeline.
A kind of turn blue technique of turning blue of device of vertical continuous annealing furnace that is exclusively used in; comprise fast cold section, overaging section, cold section eventually; being full of 3.0%～5.0% hydrogen and surplus in stove is the shielding gas that nitrogen consists of; it is characterized in that; the medium that turns blue from the medium station of turning blue; pass into fast cold section and/or overaging section and/or whole cold section burner hearth by medium pipeline; the opening degree of regulating and controlling valve, diffusion valve, regulate fast cold section and/or overaging section and/or eventually cold section burner hearth furnace gas oxygen level 0.03%～1.00%.
The described medium that turns blue is air, oxygen, water vapour or their mixed gas.
Advantage of the present invention is:
1, utilize existing vertical continuous annealing furnace, only need to increase the device that turns blue, do not need the special-purpose equipment that turns blue or the annealing-equipment that turns blue are set, the annealing of blue steel strip, two operations of turning blue are once completed in vertical continuous annealing furnace, thereby have saved facility investment and subsequent heat treatment energy consumption;
2, avoid the deep processed product of steel band or steel band--the punching second-heating, fast cold section, overaging section or eventually cold section burner hearth pass into the medium that turns blue, fast cold section of regulation and control, overaging section or whole cold section furnace atmosphere, utilize band temperature after the fast cold junction bundle of steel band annealing and annealing operation at the needed electrical heat tracing system of overaging section itself, the enforcement steel band turns blue, and does not increase energy consumption;
3, large production continuously, technique is simple, and production cost is low, and product performance are stable, and the surface is turned blue effective.With short production cycle, production efficiency is high.
Description of drawings
Fig. 1 is the vertical continuous annealing furnace of the present invention apparatus structure schematic diagram that turns blue.
In figure: 1, steel band, 2, diffusion valve, 3, combustion gas analyzer, 4, variable valve, 5, flow valve, 6, the medium station of turning blue, 7, the shielding gas station
Embodiment
Below in conjunction with embodiment, the present invention is further set forth:
As shown in Figure 1; a kind of vertical continuous annealing furnace turn blue device and the technique of turning blue thereof; comprise preheating section, heating zone, soaking zone, slow cooling section, fast cold section; overaging section, whole cold section burner hearth; each section upper furnace or bottom are communicated with; being full of 3.0%～5.0% hydrogen and surplus in stove is the shielding gas that nitrogen consists of, and each section roof of the furnace is equipped with diffusion valve 2 and is connected combustion gas analyzer 3 with pipeline, and the bottom is provided with pipeline and is communicated with shielding gas station 7.The setting medium station 6 of turning blue, with fast cold section, overaging section, cold section burner hearth is communicated with eventually, the opening degree of regulating and controlling valve 4, diffusion valve 2 is regulated fast cold section and/or overaging section and/or whole cold section burner hearth furnace gas oxygen level 0.03%～1.00% by medium pipeline.
Embodiment:Referring to Fig. 1; chill coil band 1 after pickling-rolling; volume-leveling-crop end-welding-surface cleaning, oven dry-vertical loop on vertical continuous annealing unit warp; enter annealing in vertical continuous annealing furnace; in this moment whole stove, all to be connected with 3.0%～5.0% hydrogen and surplus be the shielding gas of nitrogen to each section burner hearth; residual oxygen is controlled at below 0.02%, to prevent surface oxidation.The combustion gas analyzer 3 that the diffusion valve 2 that the control of furnace atmosphere is installed by each section roof of the furnace is connected with pipeline and the variable valve on the shielding gas pipeline 4 are realized automatically detecting and regulating, and keep pressure-fired, detect data and show in real time on the operation room display screen.Steel band 1 enters preheating in stove-heating-soaking (soaking temperature: 700 ℃～850 ℃)-slow cooling-cold soon, in fast cold section steel band 1 temperature to 400 ℃～500 ℃, enter the overaging section by fast cold section, utilize electrical heat tracing system in steel band 1 waste heat and furnace chamber, keep steel band 1 350 ℃～500 ℃ of overaging section temperature, after the overaging section, steel band 1 enters in whole cold section burner hearth, be cooled to below 190 ℃, realize annealing.If produce blue steel strip 1, increase following operation behind the slow cooling section: open alone or in combination air, oxygen or water vapour flow valve 5, the medium that turns blue is by fast cold section of tributary pipeline flow-direction, overaging section, whole cold section burner hearth, open again one or two or whole variable valve 4 on the pipeline of tributary, can realize to fast cold section, overaging section, one or two in cold section burner hearth or all pass into the medium that turns blue eventually, the number oxide thickness needed according to blue steel strip 1 that variable valve 4 is opened decided.The medium that turns blue is air, oxygen, water vapour or their mixed gas, is provided by air driven pump, oxygen generating station, steam boilers in the medium station 6 of turning blue.Provide when turning blue medium, in the burner hearth that turns blue, the furnace gas Control for Oxygen Content 0.03%～1.00%, is detected by the combustion gas analyzer 3 that pipeline connects in real time by roof of the furnace, and shows in real time on the operation room display screen.By the flow valve regulating and controlling rate-of flow of sending out the medium steam line blue, in the medium that guarantees to send out blue, oxygen level is in setting range.The furnace gas oxygen level lower than 0.03%, is driven large variable valve 4, is strengthened the medium feed rate of turning blue in the burner hearth that turns blue, and increases the furnace gas oxygen level; Otherwise the furnace gas oxygen level higher than 1.00%, turns down variable valve 4, reduces the medium feed rate of turning blue in the burner hearth that turns blue, and reduces the furnace gas oxygen level; Certainly, but the furnace gas oxygen level opening degree of comprehensive adjustment diffusion valve 2, variable valve 4 also in the burner hearth that turns blue, effective control of furnace gas oxygen level in the burner hearth of realizing turning blue.The reaction mechanism of turning blue is: in 300 ℃～560 ℃ temperature ranges, the oxygen in air, oxygen or water vapour and steel strip surface contact reacts generate the black-and-blue or blue oxide film of one deck, and main component is Fe
3O
4Or Fe
2O
3Or their mixolimnion.The basic iron reaction of the oxygen in air, oxygen or water vapour and steel band is as follows:
Air, oxygen and basic iron reaction formula:
2Fe+O
2→2FeO ……………………………………（1）
6FeO+O
2→2Fe
3O
4 ………………………………（2）
4Fe
3O
4 +O
2→6Fe
2O
3 ……………………………（3）
Water vapour and basic iron reaction formula:
Fe+H
2O→FeO+H
2 ↑ ……………………………（4）
3FeO+H
2O→Fe
3O
4+H
2 ↑ …………………………（5）
2Fe
3O
4+H
2O→3Fe
2O
3+H
2 ↑ ………………………（6）。
Existing fast cold section, the overaging section, cold section fire box temperature all possesses the steel band temperature of reaction of turning blue eventually, facts have proved, single or combination is turned blue, and all can form oxide film in steel strip surface.
Claims (4)
1. vertical continuous annealing furnace device that turns blue; comprise preheating section, heating zone, soaking zone, slow cooling section, fast cold section; overaging section, whole cold section burner hearth; each section upper furnace or bottom are communicated with; each section burner hearth is equipped with diffusion valve and combustion gas analyzer, and the bottom is communicated with the shielding gas station by pipeline, it is characterized in that; turn blue medium station of setting, by medium pipeline with fast cold section, overaging section, cold section burner hearth is communicated with eventually.
2. a kind of vertical continuous annealing furnace according to claim 1 device that turns blue, is characterized in that, is provided with variable valve in described medium pipeline.
3. one kind is exclusively used in the turn blue technique of turning blue of device of vertical continuous annealing furnace; comprise fast cold section, overaging section, cold section eventually; being full of 3.0%～5.0% hydrogen and surplus in stove is the shielding gas that nitrogen consists of; it is characterized in that; the medium that turns blue from the medium station of turning blue; pass into fast cold section and/or overaging section and/or whole cold section burner hearth by medium pipeline; the opening degree of regulating and controlling valve, diffusion valve, regulate fast cold section and/or overaging section and/or eventually cold section burner hearth furnace gas oxygen level 0.03%～1.00%.
4. a kind of turn blue technique of turning blue of device of vertical continuous annealing furnace that is exclusively used according to claim 3, is characterized in that, the described medium that turns blue is air, oxygen, water vapour or their mixed gas.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103555924A (en) * | 2013-11-08 | 2014-02-05 | 中冶南方(武汉)威仕工业炉有限公司 | Atmosphere replacement system of continuous annealing furnace |
| CN103555926A (en) * | 2013-11-08 | 2014-02-05 | 中冶南方(武汉)威仕工业炉有限公司 | Atmosphere replacement method for continuous annealing furnace |
| CN105154635A (en) * | 2015-09-17 | 2015-12-16 | 宝钢集团南通线材制品有限公司 | Oxygenic steam bluing method for corrosion-resistant spring steel |
| CN105274312A (en) * | 2015-11-20 | 2016-01-27 | 西安东威电炉设备有限公司 | Full-automatic oil removing, annealing and blueing treatment production line |
| CN106399661A (en) * | 2015-07-31 | 2017-02-15 | 宝山钢铁股份有限公司 | Vertical-type strip steel jet heat treatment device and method |
| CN107740077A (en) * | 2017-10-13 | 2018-02-27 | 江苏捷帝机器人股份有限公司 | A kind of oxidizing blackening device for ferroalloy robot part |
| CN108070707A (en) * | 2016-11-15 | 2018-05-25 | 上海梅山钢铁股份有限公司 | A kind of method of the quick furnace lifting of vertical continuous annealing furnace |
| CN112176158A (en) * | 2020-10-09 | 2021-01-05 | 新疆八一钢铁股份有限公司 | Annealing and bluing process for common cold-rolled coil |
| CN114302972A (en) * | 2020-08-03 | 2022-04-08 | 丰田纺织株式会社 | Heat treatment method and heat treatment furnace |
| CN114752929A (en) * | 2022-03-25 | 2022-07-15 | 中山市辰协五金制品有限公司 | Technology for adding color to surface of heating tube to achieve bluing effect |
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| CN101082075A (en) * | 2006-05-29 | 2007-12-05 | 宝山钢铁股份有限公司 | Process and device for coating-free electrical steel annealing and bluing |
| CN101583740A (en) * | 2007-01-09 | 2009-11-18 | 新日本制铁株式会社 | Process for producing high-strength cold rolled steel sheet excelling in chemical treatability and relevant production equipment |
| CN201762401U (en) * | 2010-07-14 | 2011-03-16 | 吴建荣 | Cold-rolling silicon steel sheet workpiece bluing device of continuous annealing bluing furnace |
| CN203065577U (en) * | 2013-01-23 | 2013-07-17 | 新余钢铁集团有限公司 | Blueing device for vertical-type continuous annealing furnace |
-
2013
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| CN101082075A (en) * | 2006-05-29 | 2007-12-05 | 宝山钢铁股份有限公司 | Process and device for coating-free electrical steel annealing and bluing |
| CN101583740A (en) * | 2007-01-09 | 2009-11-18 | 新日本制铁株式会社 | Process for producing high-strength cold rolled steel sheet excelling in chemical treatability and relevant production equipment |
| CN201762401U (en) * | 2010-07-14 | 2011-03-16 | 吴建荣 | Cold-rolling silicon steel sheet workpiece bluing device of continuous annealing bluing furnace |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103555924A (en) * | 2013-11-08 | 2014-02-05 | 中冶南方(武汉)威仕工业炉有限公司 | Atmosphere replacement system of continuous annealing furnace |
| CN103555926A (en) * | 2013-11-08 | 2014-02-05 | 中冶南方(武汉)威仕工业炉有限公司 | Atmosphere replacement method for continuous annealing furnace |
| CN103555926B (en) * | 2013-11-08 | 2015-04-22 | 中冶南方(武汉)威仕工业炉有限公司 | Atmosphere replacement method for continuous annealing furnace |
| CN103555924B (en) * | 2013-11-08 | 2015-07-08 | 中冶南方(武汉)威仕工业炉有限公司 | Atmosphere replacement system of continuous annealing furnace |
| CN106399661A (en) * | 2015-07-31 | 2017-02-15 | 宝山钢铁股份有限公司 | Vertical-type strip steel jet heat treatment device and method |
| CN105154635A (en) * | 2015-09-17 | 2015-12-16 | 宝钢集团南通线材制品有限公司 | Oxygenic steam bluing method for corrosion-resistant spring steel |
| CN105274312A (en) * | 2015-11-20 | 2016-01-27 | 西安东威电炉设备有限公司 | Full-automatic oil removing, annealing and blueing treatment production line |
| CN108070707A (en) * | 2016-11-15 | 2018-05-25 | 上海梅山钢铁股份有限公司 | A kind of method of the quick furnace lifting of vertical continuous annealing furnace |
| CN108070707B (en) * | 2016-11-15 | 2019-10-18 | 上海梅山钢铁股份有限公司 | A kind of method of the quick furnace lifting of vertical continuous annealing furnace |
| CN107740077A (en) * | 2017-10-13 | 2018-02-27 | 江苏捷帝机器人股份有限公司 | A kind of oxidizing blackening device for ferroalloy robot part |
| CN114302972A (en) * | 2020-08-03 | 2022-04-08 | 丰田纺织株式会社 | Heat treatment method and heat treatment furnace |
| CN114302972B (en) * | 2020-08-03 | 2024-02-09 | 丰田纺织株式会社 | Heat treatment method and heat treatment furnace |
| CN112176158A (en) * | 2020-10-09 | 2021-01-05 | 新疆八一钢铁股份有限公司 | Annealing and bluing process for common cold-rolled coil |
| CN114752929A (en) * | 2022-03-25 | 2022-07-15 | 中山市辰协五金制品有限公司 | Technology for adding color to surface of heating tube to achieve bluing effect |
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