CN1075169A - Continuous annealing furnace - Google Patents
Continuous annealing furnace Download PDFInfo
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- CN1075169A CN1075169A CN 92113560 CN92113560A CN1075169A CN 1075169 A CN1075169 A CN 1075169A CN 92113560 CN92113560 CN 92113560 CN 92113560 A CN92113560 A CN 92113560A CN 1075169 A CN1075169 A CN 1075169A
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- annealing
- annealing furnace
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- plate
- protective atmosphere
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Abstract
The invention discloses a kind of continuous annealing furnace that electrical sheet is produced that is used for, it is by preheating oven, process furnace, compositions such as soaking pit.It is characterized in that annealing furnace is divided into two sections, leading portion feeds wet protective atmosphere and is used for decarburizing annealing, and back segment feeds the annealing that dried protective atmosphere is used to improve magnetic, and the front and back section is separated with disrupter.The present invention is integrated in one two kinds of annealing functions, can simplify production process, enhances productivity and lumber recovery, can also save a large amount of electric power, coal gas, hydrogen simultaneously, has tangible economic benefit.
Description
The present invention relates to a kind of continuous annealing furnace that electrical steel strip is produced that is used for.
In recent years, the production method of non-oriented electrical steel strip has had very big progress, the non-oriented electrical steel strip of each trade mark of DW270～DW465 changes once cold rolling into by twice cold-rolling practice and produces, promptly by the thick hot-rolled sheet once cold rolling of 2.2mm to finished product thickness 0.48mm or 0.35mm.But because the raw material carbon content is generally 60～80PPm, so at first need carry out a decarburizing annealing, annealing furnace is in wet protective atmosphere state, i.e. nitrogen, hydrogen and water vapour, and furnace temperature is 820～860 ℃, and carbon content is reached below the 28PPm.Also will once improve the annealing of magnetic then again, annealing furnace is the dry gas atmosphere, promptly only contains nitrogen and hydrogen, and furnace temperature is 900～1000 ℃, clearly, adopts this technology, and the annealing of steel band is to finish in two different stoves respectively.
Purpose of the present invention just provides a kind of stove with two kinds of annealing functions, only needs once logical plate annealing can obtain the non-oriented electrical steel strip of certain magnetic.
In order to reach above purpose; invented a kind of continuous annealing furnace; this stove gives hot stove by non-oxidation; the radiator tube process furnace; several parts such as electricity soaking pit and cooling section are formed; it is characterized in that annealing furnace is divided into two sections by a disrupter, leading portion feeds wet protective atmosphere and realizes decarburizing annealing, and back segment feeds dried protective atmosphere and realizes magnetic annealing.
Annealing production of the present invention has the following advantages: (1) is integrated in one two kinds of annealing functions, and minimizing equipment takes up an area of; (2) simplify production process; (3) enhance productivity and lumber recovery; (4) save a large amount of electric power, coal gas, hydrogen, nitrogen etc., have tangible economic benefit.
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is the structure iron of annealing furnace of the present invention.
Fig. 2 is an annealing furnace disrupter synoptic diagram of the present invention.
As shown in Figure 1, annealing furnace of the present invention is by scale-free heating furnace 1, radiator tube process furnace 2, and electric soaking pit 3,4 and cooling section 5 are formed, and two partly before and after whole body of heater was divided into by disrupter, to reach the mutual impregnable purpose of furnace atmosphere and temperature.Disrupter of the present invention mainly is made up of plate 15 and divider wall 13 etc., and a rectangular seal groove 11 that is welded into steel plate is arranged on body of heater, fills in the groove with zircon sand 16.The top of plate is a body structure, and an inside casing 9 and housing 10 are arranged, in the inside casing with refractory fibre 6 fillings.Housing is rectangular, and its size is identical with the rectangle that the sealing groove medullary ray forms, and the end of housing is bladed, can insert among the zircon sand easily.Be equipped with support 8 on the body of heater, a worm-and-wheel gear 7 is arranged on the support, board plug device can move up and down by worm and gear.Plate 15 usefulness high temperature steel are made, and in order to strengthen its heat-resisting function, post refractory fibre in the both sides of plate.Build partition wall 13 by laying bricks or stones with refractory brick below plate, carbon cover 14 is housed on partition wall top, be scratched to prevent steel band, the carbon cover also replaces with refractory fibre.The height of carbon cover and partition wall is decided according to experiment, also can decide according to the sag of chain apart from calculating steel band of former and later two furnace bottom rolls of partition wall.Adopt after this covering device, stove just is divided into two partly effectively.For reaching decarburization and improving the purpose of magnetic, the stove leading portion feeds wet atmosphere, i.e. hydrogen, nitrogen and water vapour, and the dew point that keeps atmosphere is within 25～35 ℃ of scopes.Back segment feeds the dry gas atmosphere, and promptly a hydrogen and nitrogen keep its dew point between-5 ℃～-10 ℃.Whole stove is malleation from the back segment to the leading portion, so nitrogen from the feeding of stove afterbody cooling section, the direction of motion that reaches the atmosphere in the electric soaking pit back segment is from stove Caudad burner, makes the wet atmosphere of stove leading portion can not flow to back segment with the motion of steel band, influences the raising of product magnetic.Section is different before and after the temperature of stove, will be in the production according to decarbonization rate, and grain growth speed, the plate speed of steel band, processing parameters such as the time inside furnace of steel band are specifically set, and to different steel grades, these parameters can be adjusted neatly.
Example 1, the annealing process of W101A:
Going into furnace charge thickness is 0.48mm; carbon content is 50-60PPm; the annealing furnace unit speed is 40 meters/minute; the soaking pit front-end temperature is followed successively by 860 ℃, 880 ℃; soaking pit back segment temperature is followed successively by 980 ℃; 960 ℃ and 930 ℃, 790 ℃ of cooling section inlet temperature of steel strips, the wet shield gas flow rate of leading portion is 115NM
3/ h; The humidifier water temperature is 55 ℃; The dried shield gas flow rate that directly enters back segment without humidifier is 70NM
3/ h; Zhong Bu total N wherein
2Amount is 100NM
3/ h, total H
2Be 100N
3/ h.Through anneal, performance reaches DW310-50.
Example 2, the annealing process of W121A:
Going into furnace charge thickness is 0.48mm, and carbon content is 50-90PPm, and the annealing furnace unit speed is 50-55 rice/minute soaking pit.Soaking pit leading portion furnace temperature is followed successively by 860 ℃, 880 ℃; The back segment furnace temperature is followed successively by 940 ℃, and 860 ℃, 830 ℃; Cooling inlet temperature of steel strips is that 750 ℃ of shielding gas are N
2And H
2, with 90NM
3The N of/h
2And 80NM
3The H of/h
2After the mixing, (flow is 100NM to a part
3/ h) feed the annealing furnace leading portion through humidifier (58 ℃ of water temperatures).(flow is 60NM to another part
3/ h) humidification does not enter the annealing furnace back segment, reaches DW360-50 through the annealing performance.
Claims (6)
1, a kind of continuous annealing furnace gives hot stove by non-oxidation; the radiator tube process furnace, several parts such as electric soaking pit and cooling section are formed, and it is characterized in that annealing furnace is divided into two sections by a disrupter; leading portion feeds wet protective atmosphere and realizes decarburizing annealing, and back segment feeds dried protective atmosphere and realizes magnetic annealing.
2, annealing furnace as claimed in claim 1 is characterized in that disrupter by sealing groove, and lift plate and partition wall are formed.
3, annealing furnace as claimed in claim 2 is characterized in that sealing groove is a rectangle cell body, fills up zircon sand in the groove.
4, annealing furnace as claimed in claim 2, the top that it is characterized in that plate are casings that has inside casing and housing, fill up refractory fibre in the casing, and the end of housing is bladed, and the size of housing is identical with the rectangle that the sealing groove medullary ray forms.
5, annealing furnace as claimed in claim 2 is characterized in that plate makes with heat-resisting steel sheet and plate, and refractory fibre is being pasted in the plate both sides.
6, annealing furnace as claimed in claim 2 is characterized in that partition wall is positioned at the below of plate, is built into refractory brick, and its top is a graphite carbon sleeve or applies with refractory fibre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92113560A CN1035519C (en) | 1992-11-25 | 1992-11-25 | Continuous annealer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92113560A CN1035519C (en) | 1992-11-25 | 1992-11-25 | Continuous annealer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1075169A true CN1075169A (en) | 1993-08-11 |
| CN1035519C CN1035519C (en) | 1997-07-30 |
Family
ID=4946474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92113560A Expired - Fee Related CN1035519C (en) | 1992-11-25 | 1992-11-25 | Continuous annealer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1035519C (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787429B (en) * | 2010-02-22 | 2011-07-20 | 杭州钱江弹簧有限公司 | Bar stock heating furnace |
| CN103014308A (en) * | 2012-12-05 | 2013-04-03 | 中冶南方(武汉)威仕工业炉有限公司 | Galvanized vertical annealing furnace |
| CN104894360A (en) * | 2015-05-08 | 2015-09-09 | 北京首钢股份有限公司 | Method for controlling continuous annealing furnace |
| CN106755930A (en) * | 2017-01-10 | 2017-05-31 | 首钢京唐钢铁联合有限责任公司 | Front-to-back continuous heating method for annealing furnace |
| CN106755809A (en) * | 2017-01-10 | 2017-05-31 | 首钢京唐钢铁联合有限责任公司 | Back-to-front continuous heating method for annealing furnace |
| CN108866286A (en) * | 2018-05-31 | 2018-11-23 | 浙江智造热成型科技有限公司 | The production technology of non-oriented electrical steel |
| CN110669911A (en) * | 2019-10-18 | 2020-01-10 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Operation method of hot galvanizing vertical annealing furnace telescopic labyrinth isolation nitrogen interlocking control system |
| CN112626327A (en) * | 2020-12-25 | 2021-04-09 | 江苏大力神科技股份有限公司 | Furnace throat installed between heating section and cooling section of annealing furnace |
| CN115369407A (en) * | 2021-05-19 | 2022-11-22 | 四川瑞致电工钢有限公司 | Preparation method of efficient non-oriented electrical steel |
| CN115449610A (en) * | 2022-09-27 | 2022-12-09 | 中冶南方（武汉）热工有限公司 | Open fire heating and non-oxidation soaking heat treatment furnace and heat treatment method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85202609U (en) * | 1985-07-01 | 1986-05-28 | 北京金星金笔厂 | Continuous vacuum annealing furnace for stainless steel strip |
-
1992
- 1992-11-25 CN CN92113560A patent/CN1035519C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787429B (en) * | 2010-02-22 | 2011-07-20 | 杭州钱江弹簧有限公司 | Bar stock heating furnace |
| CN103014308A (en) * | 2012-12-05 | 2013-04-03 | 中冶南方(武汉)威仕工业炉有限公司 | Galvanized vertical annealing furnace |
| CN104894360A (en) * | 2015-05-08 | 2015-09-09 | 北京首钢股份有限公司 | Method for controlling continuous annealing furnace |
| CN104894360B (en) * | 2015-05-08 | 2017-05-17 | 北京首钢股份有限公司 | Method for controlling continuous annealing furnace |
| CN106755930B (en) * | 2017-01-10 | 2018-12-14 | 首钢京唐钢铁联合有限责任公司 | Front-to-back continuous heating method for annealing furnace |
| CN106755930A (en) * | 2017-01-10 | 2017-05-31 | 首钢京唐钢铁联合有限责任公司 | Front-to-back continuous heating method for annealing furnace |
| CN106755809A (en) * | 2017-01-10 | 2017-05-31 | 首钢京唐钢铁联合有限责任公司 | Back-to-front continuous heating method for annealing furnace |
| CN106755809B (en) * | 2017-01-10 | 2018-12-14 | 首钢京唐钢铁联合有限责任公司 | Back-to-front continuous heating method for annealing furnace |
| CN108866286A (en) * | 2018-05-31 | 2018-11-23 | 浙江智造热成型科技有限公司 | The production technology of non-oriented electrical steel |
| CN110669911A (en) * | 2019-10-18 | 2020-01-10 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Operation method of hot galvanizing vertical annealing furnace telescopic labyrinth isolation nitrogen interlocking control system |
| CN110669911B (en) * | 2019-10-18 | 2023-05-12 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Operating method of telescopic labyrinth isolation nitrogen interlocking control system of hot galvanizing vertical annealing furnace |
| CN112626327A (en) * | 2020-12-25 | 2021-04-09 | 江苏大力神科技股份有限公司 | Furnace throat installed between heating section and cooling section of annealing furnace |
| CN115369407A (en) * | 2021-05-19 | 2022-11-22 | 四川瑞致电工钢有限公司 | Preparation method of efficient non-oriented electrical steel |
| CN115449610A (en) * | 2022-09-27 | 2022-12-09 | 中冶南方（武汉）热工有限公司 | Open fire heating and non-oxidation soaking heat treatment furnace and heat treatment method |
| CN115449610B (en) * | 2022-09-27 | 2023-11-03 | 中冶南方（武汉）热工有限公司 | Heat treatment furnace for open fire heating and non-oxidation soaking and heat treatment method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1035519C (en) | 1997-07-30 |
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