CN2714577Y - Electromagnetic suspension continuous heat treatment furnace for steel strip - Google Patents
Electromagnetic suspension continuous heat treatment furnace for steel strip Download PDFInfo
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- CN2714577Y CN2714577Y CN 200420065073 CN200420065073U CN2714577Y CN 2714577 Y CN2714577 Y CN 2714577Y CN 200420065073 CN200420065073 CN 200420065073 CN 200420065073 U CN200420065073 U CN 200420065073U CN 2714577 Y CN2714577 Y CN 2714577Y
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- heat treatment
- steel band
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- steel strip
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Abstract
The utility model relates to an electromagnetic suspension continuous heat treatment furnace for steel strip, relating to an electromagnetic suspension continuous heat treatment device for steel strip. The two ends of the heat treatment furnace body are provided with a decoiler and a coiler; the steel strip expanded by the decoiler enters into a heating section through a conductor roll. The heat treatment furnace at least comprises two heating sections, at least one soaking heat insulation section, and one cooling control section; each section is respectively provided with a direct current power supply of each section itself; the two sides of the furnace body behind the secondary heating section are provided with a magnetic suspension device, and a magnetic positioning correcting error device; the magnetic suspension device comprises a soft magnetic iron core and coils winded on the two sides. The utility model directly energizes the steel strip, the steel strip itself is made to be the heating element to be heated to conduct the warming and the heat insulation, and the heat treatment is realized; the heat efficiency is high and the energy is saved. The two sides of the furnace body is additionally added with a transverse magnetic field, and the steel strip runs in a suspension mode in the continuous heat treatment furnace; the heat treatment temperature can achieve above 1250 degrees C, and the utility model is in particular adapted for the continuous heat treatment for silicon steel.
Description
Technical field the utility model relates to a kind of steel band suspension continuous heat treatment apparatus, the silicon strip Equipment for Heating Processing that particularly a kind of resistivity is high.
In the iron and steel industry, the steel band continuous heat treatment generally is to be supported by furnace bottom roll to background technology now, at rice up to a hundred, still carry out to hundreds of meters the continuous annealing furnace., furnace bottom roll resistive connection knurl, performance such as wear-resistant and high temperature resistant have great effect to quality, the production cost of steel band.For improving the furnace bottom roll performance, improve its work-ing life, relevant insider is carrying out long-term and unremitting effort, but so far satisfactory result is not arranged all.
Last century end, Japan at first develop advanced need not furnace bottom roll, air-flotation type continuous annealing furnace, unescapable all inconvenience owing to use furnace bottom roll in the hope of overcoming.The air-flotation type continuous annealing furnace is circulation, advertises the shielding gas through heating, pressurization, utilizes the pressure reduction of steel band above and below, overcomes the gravity of steel band, makes steel band suspend, run in the continuous annealing furnace.This technology must be encircled and follow a large amount of hot protective gas.The heat protection gas that extracts from stove will pass through heat exchange, so that gas temperature drops to below the temperature of being convenient to pressurize, after protection gas is pressurized, is heated to the steel band thermal treatment temp of process stipulation again.Therefore, energy consumption is higher, and the thermal treatment temp that the while continuous oven can be realized also is subjected to certain restriction.
In the silicon steel industry, because the needs of some production technique, the insider successively develops and multiplely directly switches on to steel band, make steel band as Heating element, oneself generates heat, heat up and insulation, through heat-treated, opened flat 2-43320 (open day: February 13 nineteen ninety) as day spy of the present disclosure, Te Kaiping 7-41860 (open day: February 10 nineteen ninety-five), Te Kaiping 10-25522 (open day: on January 27th, 1998) patented technology, and the Japanese patent CN1226935A that declares in China (open day on August 25th, 1999) etc., these technology or discontinuous, though or continuously, but only only be used for rapid heating, all do not have to interrelate with magnetic levitation, electric current all only only is used as thermal source, and be not used as and magnetic field interaction, make steel band simultaneously bear magnetic buoyancy again and be suspended in the heat treatment furnace.
In the industrial production, general steel band continuous annealing furnace is a horizontal, and promptly steel band rolls the face level run in continuous annealing furnace.
The summary of the invention the purpose of this utility model is at above-mentioned present situation; aiming to provide a kind of steel band that can make suspends, runs in the continuous annealing furnace; steel band is as Heating element; oneself generate heat, heat up and insulation; through heat-treated; both energy-conservation, can satisfy the steel band electromagnetic suspension continuous heat treating furnace of thermal treatment process again without restriction to high-temperature and protective atmosphere requirement.
The implementation of the utility model purpose is; steel band electromagnetic suspension continuous heat treating furnace; heat treatment furnace has 2 heating zones and at least 1 soaking holding-zone and a controlled chilling section at least; every section direct supply that oneself is arranged; outside the body of heater 4 from second heating zone to the controlled chilling section magnetic levitation system 6 is arranged; magnetic orientation deviation correcting device 5 is arranged therebetween; magnetic levitation system is made of soft magnet core 14 and the coil outside it 15; intersegmental conductive rollers 2 and/or the conduction brush that has for steel band 3 electric energy of each stove; and/or the conduction setting of conductive liquid composition, the body of heater two ends have steel band Abrollhaspel 1 respectively; reeling machine 13; ground protection is provided with 12; reach the furnace bottom roll 11 that the low temperature oven section retains.
Advantage of the present utility model is:
1, directly to the steel band energising, electric current directly makes the steel band heating, heats up and insulation as the energy on the one hand, finishes thermal treatment, thermo-efficiency height, energy-conservation;
2, magnetic levitation system applies transverse magnetic field in the continuous annealing furnace both sides again, electric current in the steel band make steel band heating, heat up and insulation in again and magnetic field interaction, the power that formation makes progress steel band, to overcome the gravity of steel band, make steel band can suspend, run in the continuous annealing furnace, this is just unconventional fully all unfavorable owing to what use furnace bottom roll to bring;
3, thermal treatment temp can reach more than 1250 ℃, can satisfy thermal treatment process fully, and particularly the silicon steel thermal treatment process is to the requirement of high-temperature.
Description of drawings
Fig. 1 the utility model structural representation
Magnetic levitation system A-A sectional view among Fig. 2 Fig. 1
Magnetic orientation deviation correcting device B-B sectional view among Fig. 3 Fig. 1
Fig. 4 Controlling System skeleton diagram
Embodiment is with reference to Fig. 1,2, the utility model heat treatment furnace has 2 heating zones and at least 1 soaking holding-zone and a controlled chilling section at least, every section direct supply that oneself is arranged, magnetic levitation system 6 is arranged outside the body of heater from second heating zone to the controlled chilling section, magnetic orientation deviation correcting device 5 is arranged therebetween, magnetic levitation system is made of soft magnet core 14 and the coil outside it 15.The intersegmental conduction setting of being made up of conductive rollers 2 and/or conduction brush and/or conductive liquid of each stove, continuous heat treating furnace two ends have steel band Abrollhaspel 1, reeling machine 13, ground protection to be provided with 12 and the furnace bottom roll 11 that retains of low temperature oven section respectively.
With reference to Fig. 1, during the utility model work, before steel band enters continuous oven by Abrollhaspel 1 uncoiling, promptly directly switch on conductive rollers 2, by the speed heating of processing requirement, elder generation is by the first heating zone power supply, 7 direct heating in body of heater 4, the power of control power supply 7, temperature is equal to or higher than Curie-point temperature when making steel band enter the 2nd heating zone, and promptly general steel band is 770 ℃, and the 3%Si steel band is 750 ℃; From the 2nd heating zone, apply transverse magnetic field in the continuous annealing furnace both sides, the 2nd heating zone is by power supply 8 power supply heating; The control output power with system of heat treatment process predetermined heating speed, is heated to assigned temperature with steel band; Soaking holding-zone power supply 9 makes the steel band insulation, carries out samming and handles, and energize is with the outside dispersed heat of balance steel band; Controlled chilling section power supply 10 is supplied with the steel band electric current, and electric current only makes steel band can be suspended in the continuous oven, and is the smaller the better, increases the intensity of horizontal suspension magnetic simultaneously as far as possible, makes steel band be cooled to Curie-point temperature with the speed of cooling of process stipulation.After temperature of steel strips drops to below the Curie temperature, can be by industrial usual method, it is cold etc. to carry out air cooling or jacket pipe, and temperature of steel strips is cooled to normal temperature, is batched by reeling machine 13 again, finishes the thermal treatment of steel band.
To the control of electric current in the control of temperature of steel strips and the floating device of magnetic, with very sophisticated automatic control technology in the existing industry, can realize as digital PID adjusting and so on.
According to the electromagnetic interaction relational expression:
F=I
1BL
1Sin φ=I
1BL
1(φ in the factor=90 °, Sin φ=1) (1)
Can predict, magnetic buoyant weight F newton's the needed magneticflux-density B of steel band, again according to magneticflux-density B, the relational expression between magnetomotive force NI and magnetic resistance R:
NI
2＝RBA (2)
R＝L
2/μA (3)
Draw:
I
2＝FL
2/I
1L
1μN (4)
Can predict, control due electric current I in the magnetic levitation coil by above 4 formulas
2Thereby, realize temperature of steel strips and magnetic buoyancy control in the continuous annealing furnace.
In the above relational expression
F: electromagnetic force, unit: newton (N);
I
1, I
2: be respectively in the steel band and the magnetic levitation system coil in electric current, unit: ampere (A);
B: magneticflux-density, unit: tesla (T);
L
1, L
2: be respectively and be suspended in steel band length and magnetic levitation system distance between two poles in the magnetic field, unit: m;
φ: the angle of cut of the magnetic field and the sense of current is the right angle herein;
N: magnetic levitation system coil turn;
R: magnetic resistance; Unit: 1/ henry;
A; By steel band magnetic flux flow section area, unit: m
2
μ: loop medium permeability, unit: henry/m.
Controlling System skeleton diagram of the present utility model is seen Fig. 4.For electric current and the alternative frequency in the magnetic correction locating device, can dispose flexibly according to practical situation, under the prerequisite of stabilized steel tape running, from energy-conservation angle, electric current is more little, and alternative frequency is low more good more.
In the 1st heating zone, also can use non-direct step modes such as reductibility naked light flame, or heat radiation tube, fast steel band is heated to more than the Curie temperature.
With reference to Fig. 3, in order to prevent the steel band sideslip, stably suspend, run in the continuous annealing furnace, to controlled chilling is intersegmental the magnetic orientation deviation correcting device that is no less than two arranged in the 2nd heating zone, the magnetic orientation deviation correcting device is made of magnetic orientation deviation correcting device soft iron core 16 and the coil 17 outside it.The magnetic field of the magnetic orientation correction that constitutes by magnetic orientation deviation correcting device soft magnet core 18 and the coil 17 around it outside be direction vertically, frequency is the alternating magnetic field of 0.1～120HZ.Magnetic orientation correction magnetic field applies the alternating magnetic field of vertical direction to the soaking holding-zone, also be electric current and the magnetic field interaction that utilizes in the steel band, produce vertical in the horizontal direction with steel band direction of motion, the power that direction and big minor cycle change, make near the among a small circle internal vibration of the steel band central position, thereby realize the location, prevent the steel band sideslip.
Adopt the utility model continuous annealing furnace can be designed to edge-on formula, make the face that the rolls vertical level of steel band, edge-on running in the continuous annealing furnace, compare, more can reach energy-conservation effect with horizontal.
Claims (4)
1; steel band electromagnetic suspension continuous heat treating furnace; it is characterized in that heat treatment furnace has 2 heating zones and at least 1 soaking holding-zone and a controlled chilling section at least; every section direct supply that oneself is arranged; there is magnetic levitation system (6) body of heater from second heating zone to the controlled chilling section (4) both sides; magnetic orientation deviation correcting device (5) is arranged therebetween; magnetic levitation system is made of soft magnet core (14) and the coil (15) around its both sides; intersegmental conductive rollers (2) and/or the conduction brush that has for steel band (3) electric energy of each stove; and/or the conduction setting of conductive liquid composition, the body of heater two ends have steel band Abrollhaspel (1) respectively; reeling machine (13); ground protection is provided with (12); reach the furnace bottom roll (11) that the low temperature oven section retains.
2, steel band electromagnetic suspension continuous heat treating furnace according to claim 1, it is characterized in that to controlled chilling is intersegmental the magnetic orientation deviation correcting device that is no less than two being arranged in the 2nd heating zone, the magnetic orientation deviation correcting device constitutes by magnetic orientation deviation correcting device soft magnet core (16) and around the coil (17) of its both sides.
3, steel band electromagnetic suspension continuous heat treating furnace according to claim 1 is characterized in that by the positioning and rectifying magnetic field that magnetic orientation deviation correcting device soft magnet core (16) and the coil (17) outside it constitute being that direction is vertical, frequency is the frequency conversion magnetic field of 0.1～120HZ.
4, steel band electromagnetic suspension continuous heat treating furnace according to claim 1 is characterized in that first heating zone adopts reductibility naked light flame, or the non-direct step mode heating of thermal radiation tubing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420065073 CN2714577Y (en) | 2004-06-28 | 2004-06-28 | Electromagnetic suspension continuous heat treatment furnace for steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420065073 CN2714577Y (en) | 2004-06-28 | 2004-06-28 | Electromagnetic suspension continuous heat treatment furnace for steel strip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2714577Y true CN2714577Y (en) | 2005-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420065073 Expired - Lifetime CN2714577Y (en) | 2004-06-28 | 2004-06-28 | Electromagnetic suspension continuous heat treatment furnace for steel strip |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586577A (en) * | 2012-03-09 | 2012-07-18 | 辽宁科技大学 | Continuous reduction annealing furnace for sheet metal strips |
| CN105157387A (en) * | 2015-09-29 | 2015-12-16 | 深圳市信宇人科技有限公司 | Tunnel type oven having magnetic suspension conveying function |
| CN108491008A (en) * | 2018-04-20 | 2018-09-04 | 广东工业大学 | A kind of electromagnetic suspension type solar heat treatment furnace |
-
2004
- 2004-06-28 CN CN 200420065073 patent/CN2714577Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586577A (en) * | 2012-03-09 | 2012-07-18 | 辽宁科技大学 | Continuous reduction annealing furnace for sheet metal strips |
| CN102586577B (en) * | 2012-03-09 | 2013-07-17 | 辽宁科技大学 | Continuous reduction annealing furnace for sheet metal strips |
| CN105157387A (en) * | 2015-09-29 | 2015-12-16 | 深圳市信宇人科技有限公司 | Tunnel type oven having magnetic suspension conveying function |
| CN108491008A (en) * | 2018-04-20 | 2018-09-04 | 广东工业大学 | A kind of electromagnetic suspension type solar heat treatment furnace |
| CN108491008B (en) * | 2018-04-20 | 2023-10-03 | 广东工业大学 | Electromagnetic suspension type solar heat treatment furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140628 Granted publication date: 20050803 |