CN102471858A - Method for heating lightweight metal ingots - Google Patents

Method for heating lightweight metal ingots Download PDF

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Publication number
CN102471858A
CN102471858A CN2010800364366A CN201080036436A CN102471858A CN 102471858 A CN102471858 A CN 102471858A CN 2010800364366 A CN2010800364366 A CN 2010800364366A CN 201080036436 A CN201080036436 A CN 201080036436A CN 102471858 A CN102471858 A CN 102471858A
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CN
China
Prior art keywords
light metal
metal piece
heat
stove
thermal barrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2010800364366A
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Chinese (zh)
Inventor
E·莫比策
R·艾伯纳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebner Industrieofenbau GmbH
Original Assignee
Ebner Industrieofenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ebner Industrieofenbau GmbH filed Critical Ebner Industrieofenbau GmbH
Publication of CN102471858A publication Critical patent/CN102471858A/en
Pending legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • 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
    • C21D1/34—Methods of heating
    • 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
    • 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
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0025—Supports; Baskets; Containers; Covers
    • 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
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/0016—Chamber type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • 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
    • C21D1/34—Methods of heating
    • C21D1/52—Methods of heating with flames
    • 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
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals

Abstract

The invention relates to a method for heating lightweight metal ingots (1), the lightweight metal ingots (1) being heated in a furnace (2) by hot burner waste gases. In order to create advantageous conditions of heating, the lightweight metal ingots (1), before being heated in the furnace (2), are preheated by means of at least one preheating device (8) which rests flat on the ingots and which is supplied by a liquid heat transfer medium that is heated by heat exchange with the hot waste gases emitted by the furnace (2), said medium being circulated in a cycle (7).

Description

Be used to heat the method for light metal piece
Technical field
The present invention relates to a kind of method that is used to heat the light metal piece, wherein, the logical superheated burner flue gas of light metal piece is heated in stove.
Background technology
For hot rolling light metal piece, with the light metal piece in stove, in pusher furnace, heat usually.For this purpose, known in burner combustion liquid or gasiform fuel and the light metal piece is loaded by burner flue gas by gas blower round-robin heat.In order to utilize the appreciable used heat of furnace exhaust, utilize the waste gas of heat preheated in heat exchange for the essential combustion air of burner, can realize fuel saving thus.But, higher flame temperature support has the oxynitride of load to form to environment.
Also known for metal sheet is heat-treated (EP 2 014 777 A1) be arranged between two heat transfer plates and give these heat transfer plates to add heat load metal sheet, thereby the heat transfer plate that heat abuts on the metal sheet from the face formula are delivered on the metal sheet.But such device that is used for the heat-treated metal plate possibly not contribute for the light metal piece is heated to desired hot-rolled temperature rapidly.
Summary of the invention
Therefore; The objective of the invention is to; Design a kind of method that is used to heat the light metal piece that starts said type, make, reducing owing to can preheat the light metal piece under the situation of the carrying capacity of environment that oxynitride causes through making full use of the used heat of furnace exhaust.
The purpose that the such realization of the present invention is proposed; Promptly; The light metal piece is preheated via the preheating apparatus that at least one face formula reclines before it heats in stove; This preheating apparatus is loaded thermal barrier liquid, that in the loop, be directed, this thermal barrier with heat exchange from the hot waste gas of stove in be heated.
Appreciable used heat through by furnace exhaust preheats the light metal piece, save combustion air and preheat, thereby flame temperature is lower and thereby the significantly danger of reduction formation oxynitride.Because preheating of light metal piece, the lower temperature of burner flue gas did not almost influence the time of passing through of light metal piece through stove, thereby can guarantee relatively shorter heat-up time.But, by from the hot waste gas of stove to the light metal piece directly preheat will with expend, can be related with the device that stove is compared mutually.Expend for fear of this; Appreciable used heat by from the hot waste gas of stove heats the liquid heat carrier that in the loop, is directed in heat exchange; Load preheating apparatus then by this thermal barrier; Cling on this preheating apparatus to the light metal piece face formula that heats, thereby the heat that loads the thermal barrier of preheating apparatus is delivered on the light metal piece that abuts on the preheating apparatus.Because the thermal barrier loop can also be set up preheating apparatus away from stove ground, because such thermal barrier also pumps in the insulating pipeline on bigger highway section with can need not to expend especially.Therefore, preheating of light metal piece can be inserted in the production line of light metal piece at favourable position.
Heat the light metal piece in order to utilize via the heated stove of burner, can be from traditional device, in this equipment, being provided with can be by the interchanger of the hot waste gas of stove loading.But it is different with such traditional device; The preheating apparatus that interchanger holds the light metal piece together with the mode that reclines with the face formula must be arranged on a thermal barrier loop that is used for liquid heat carrier; Thereby via interchanger is not combustion air but the heating liquid heat carrier that heating is used for burner, and this thermal barrier is given the preheating apparatus hold the light metal piece with its heat release then.
For heat passage importantly large-area as far as possible, gapless/the reclining on preheating apparatus that flush.For this purpose, preheating apparatus can have support, this supporting band be useful on the supporting surface of light metal piece and extend transverse to this supporting surface, by the heat transfer plate of thermal barrier percolation, this heat transfer plate is formed for the abutment face of light metal piece.Heat transfer plate preferably is made up of two layers at this, between these two layers, forms at least one and is used for the flow passage of thermal barrier, and the layer of the formation abutment face in these two layers should have for heat transfer passs favourable characteristic.Another relative layer is configured to, and makes and avoids thermosteresis as far as possible, and this perhaps requires a layer that is made up of thermal insulation material perhaps to require one to be provided with the adiabatic layer.Conduct heat with harmless as far as possible lost territory in order to guarantee that one of them layer abuts on the light metal piece in large area, this layer of the formation abutment face of heat transfer plate can be divided into a plurality of distinct area through the groove that forms crooked position.If between these two layers, carry thermal barrier with enough transfer pressures; So that load the layer of the formation abutment face of heat exchanger plates with corresponding hydraulic pressure; Even then the light metal piece has roughness, can guarantee that also this layer that forms abutment face seamlessly abuts on the light metal piece synergistically with the crooked position of groove type.The layer that deviates from the light metal piece of heat exchanger plates forms bearing at this, thereby this layer that deviates from the light metal piece can or itself be configured to perhaps can correspondingly supporting of enough bending resistances.
Another measure of supporting preheating apparatus face formula to abut on the light metal piece is that heat transfer plate is deviating from the side of abutment face by flexibly support.When abutment face was not parallel to the face that the reclines extension of light metal piece, this elastic support allowed autonomous balance.
When the supporting surface that is used for the light metal piece of support when the abutment face of heat transfer plate descends over there, obtain particularly advantageous design conditions.In such formation scheme, the corresponding light metal piece that will heat slides towards abutment face along supporting surface, so that seamlessly cling on this abutment face.For fear of sliding friction; Supporting surface can have roller; These rollers have and supporting surface and the axis parallel with the abutment face of heat transfer plate, thus for example by elevator be placed on the roller of supporting surface the light metal piece since gravity be pressed onto on this abutment face towards the abutment face motion of heat transfer plate and with force component via roller by the weight decision.
Description of drawings
Illustrate in greater detail the method that is used to heat the light metal piece according to of the present invention according to accompanying drawing.Among the figure:
Fig. 1 illustrates the equipment that is used to heat the light metal piece by of the present invention with the skeleton diagram of signal,
Fig. 2 illustrates the preheating apparatus that is used for the light metal piece with vertical drawing in side sectional elevation, and
Fig. 3 illustrates the sectional view according to the III-III line of Fig. 2 with less ratio.
Embodiment
According to Fig. 1, be provided with stove 2, pusher furnace normally in order to heat light metal piece 1, this stove is heated by burner 3.In order in stove 2, to distribute the burner flue gas of heat to be provided with at least one gas blower 4.Waste gas from the heat of stove 2 is drawn out of and inputs to interchanger 6 via exhaust pipeline 5, and this interchanger is the part in thermal barrier loop 7.Except interchanger 6, this thermal barrier loop also has recycle pump 8 and preheating apparatus 9 in order to heat liquid heat carrier, and this preheating apparatus comprises by the interchanger of heat transfer plate 10 forms of liquid heat carrier percolation.The light metal piece 1 that 9 formulas of preheated device are held is therefore preheated by the thermal barrier of in the loop, being taken out by pump via the heat exchanger plates that reclines 10; So that after it preheats, in stove 2, be heated to desired hot-rolled temperature; By the burner flue gas of heat, the appreciable used heat of this burner flue gas is used for heating the liquid heat carrier at interchanger 6 after heating light metal piece 1 or rather.The appreciable used heat that makes full use of from the waste gas of stove 2 not only improves energy balance but also allows to make the lower flame temperature operation of stove 2 with burner 3, thereby can avoid oxynitride to form the danger that increases basically.
9 of preheating apparatus are shown specifically in Fig. 2 and 3.According to shown in embodiment, preheating apparatus 9 has a support 11, this support is confirmed the supporting surface 13 that formed by roller 12.Transverse to this supporting surface 13, preferred vertical is extended in this supporting surface or rather, this heat transfer plate is supported on the supporting leg 14 of support, can be as can be seen from Figure 2 like this by the heat transfer plate 10 of thermal barrier percolation.Because support 11 be arranged so that supporting surface 13 towards heat transfer plate 10 descend and the parallel axes of the roller 12 of supporting surface 13 in supporting surface 13 and be parallel to heat exchanger plates 10 and extend; So the light metal piece 1 that is placed on the roller 12 is rolled towards heat exchanger plates 10 by weight decision ground, this heat exchanger plates is formed for the abutment face 15 of light metal piece 1.Via abutment face 15 seamlessly abut on the corresponding light metal piece 1 heat exchanger plates 10 therefore since the given temperature difference heat of the thermal barrier of percolation heat exchanger plates 10 is delivered on the corresponding light metal piece 1.
In order to create simple design conditions, heat exchanger plates 10 has two layers 16,17, between these two layers, obtains at least one flow passage that is used for liquid heat carrier 18, and this flow passage is connected on the preceding spout 19 and refluxing opening 20 in thermal barrier loop 7.The flow passage 18 that indentation extends in according to the embodiment of Fig. 3 for example pass through in one of said two layers 16 and 17, the preferably milling portion formation in the layer 17 that deviates from abutment face 15.Because defining of the mutual sealing of the various piece of flow passage 18 is unimportant, thus two layers 16 and 17 each other through one on the edge of side ring around sealing member 21 sealings just be enough to.
For 15 formulas of abutment face of supporting to be formed by layer 16 abut on the corresponding light metal piece 1; This layer 16 can be divided into through groove 22 and define the zone that separates each other; Its further groove forms crooked position, and these crooked positions allow to make abutment face 15 be matched with the corresponding surface of corresponding light metal piece 1 through the corresponding deformation of layer 16 when through liquid heat carrier layer 16 being loaded.Relative layer 17 necessary formation one corresponding bearing, and have enough bending strengths perhaps by the support of bending resistance ground.For fear of thermosteresis, the layer 17 that deviates from light metal piece 1 of heat exchanger plates 10 is provided with insulation 23.But layer 17 itself also can be processed by thermal insulation material.
The another kind of possibility of supporting light metal plate 1 seamlessly to abut on the abutment face 15 of heat exchanger plates 10 is; Heat exchanger plates 10 is supported via the supporting leg 14 of spring element 24 with respect to support 11, can realize that therefore heat exchanger plates 1 leans on the independently global orientation of face with respect to the retaining of corresponding light metal piece 1.The spring element 24 of whisker form is shown in the present embodiment, but this not compulsory.

Claims (8)

1. be used to heat the method for light metal piece; Wherein, The logical superheated burner flue gas of light metal piece is heated in stove, it is characterized in that, said light metal piece (1) is preheated via the preheating apparatus (9) that at least one face formula reclines before it heats in stove (2); This preheating apparatus is loaded thermal barrier liquid, that in loop (7), be directed, this thermal barrier with heat exchange from the hot waste gas of stove (2) in be heated.
2. be used to heat the equipment of light metal piece; Comprise via heated stove of burner and the interchanger that can be loaded the hot waste gas of stove; It is characterized in that said interchanger (6) and be arranged in a thermal barrier loop (7) that is used for liquid heat carrier with the preheating apparatus (9) that the mode that the face formula reclines is held light metal piece (1).
3. equipment according to claim 2; It is characterized in that; Said preheating apparatus (9) has support (11); This supporting band be useful on the supporting surface (13) of light metal piece (1) and extend transverse to this supporting surface (13), by the heat transfer plate of thermal barrier percolation (10), this heat transfer plate is formed for the abutment face (15) of light metal piece (1).
4. equipment according to claim 3 is characterized in that, said heat transfer plate (10) is made up of two layers (16,17), between these two layers, forms at least one and is used for the flow passage (18) of thermal barrier.
5. equipment according to claim 4 is characterized in that, the layer (16) of the formation abutment face (15) of said heat transfer plate (10) is divided into a plurality of distinct area through the groove (22) that forms crooked position.
6. according to the described equipment of one of claim 3 to 5, it is characterized in that said heat transfer plate (10) is flexibly supported on a side that deviates from abutment face (15).
7. according to the described equipment of one of claim 3 to 6, it is characterized in that the supporting surface that is used for light metal piece (1) (13) of said support (11) descends towards abutment face (15) over there.
8. equipment according to claim 7 is characterized in that, said supporting surface (13) has roller (12), these rollers have with supporting surface (13) and with the parallel axis of abutment face (15).
CN2010800364366A 2009-07-03 2010-06-14 Method for heating lightweight metal ingots Pending CN102471858A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ATA1040/2009 2009-07-03
AT0104009A AT507669B1 (en) 2009-07-03 2009-07-03 METHOD FOR HEATING LIGHT METAL BLOCKS
PCT/AT2010/000209 WO2011000006A2 (en) 2009-07-03 2010-06-14 Method for heating lightweight metal ingots

Publications (1)

Publication Number Publication Date
CN102471858A true CN102471858A (en) 2012-05-23

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Application Number Title Priority Date Filing Date
CN2010800364366A Pending CN102471858A (en) 2009-07-03 2010-06-14 Method for heating lightweight metal ingots

Country Status (10)

Country Link
US (1) US20120125569A1 (en)
EP (1) EP2449144A2 (en)
JP (1) JP2012531526A (en)
KR (1) KR20120110079A (en)
CN (1) CN102471858A (en)
AT (1) AT507669B1 (en)
RU (1) RU2012103563A (en)
TW (1) TW201102601A (en)
WO (1) WO2011000006A2 (en)
ZA (1) ZA201200030B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108827009A (en) * 2018-07-23 2018-11-16 易平 Repetitive sequence circulation preheating device
CN114136136A (en) * 2021-11-10 2022-03-04 中国航发沈阳发动机研究所 Pressure wave heat exchanger

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114540609A (en) * 2022-01-14 2022-05-27 湖州中合鑫顺特钢股份有限公司 Inclined bottom heating process based on heat recovery

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078446A1 (en) * 1981-10-29 1983-05-11 ITALIMPIANTI Società Italiana Impianti p.a. Process and apparatus for preheating
EP0216561A2 (en) * 1985-09-10 1987-04-01 Kawasaki Steel Corporation Preheating method of steel strips
JP2007003065A (en) * 2005-06-22 2007-01-11 Sanyo Special Steel Co Ltd Double-chamber furnace and steel product heating method
CN201106061Y (en) * 2007-09-03 2008-08-27 北京佰能电气技术有限公司 Scrap preheater for charging electric stove
CN101363067A (en) * 2008-09-27 2009-02-11 袁长胜 Combined double preheating device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2014777B1 (en) 2007-07-11 2013-01-09 Neue Materialien Bayreuth GmbH Method and device for thermal treatment of metal sheet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078446A1 (en) * 1981-10-29 1983-05-11 ITALIMPIANTI Società Italiana Impianti p.a. Process and apparatus for preheating
EP0216561A2 (en) * 1985-09-10 1987-04-01 Kawasaki Steel Corporation Preheating method of steel strips
JP2007003065A (en) * 2005-06-22 2007-01-11 Sanyo Special Steel Co Ltd Double-chamber furnace and steel product heating method
CN201106061Y (en) * 2007-09-03 2008-08-27 北京佰能电气技术有限公司 Scrap preheater for charging electric stove
CN101363067A (en) * 2008-09-27 2009-02-11 袁长胜 Combined double preheating device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108827009A (en) * 2018-07-23 2018-11-16 易平 Repetitive sequence circulation preheating device
CN114136136A (en) * 2021-11-10 2022-03-04 中国航发沈阳发动机研究所 Pressure wave heat exchanger
CN114136136B (en) * 2021-11-10 2023-11-28 中国航发沈阳发动机研究所 Pressure wave heat exchanger

Also Published As

Publication number Publication date
US20120125569A1 (en) 2012-05-24
ZA201200030B (en) 2013-04-24
WO2011000006A2 (en) 2011-01-06
EP2449144A2 (en) 2012-05-09
KR20120110079A (en) 2012-10-09
RU2012103563A (en) 2013-08-10
TW201102601A (en) 2011-01-16
WO2011000006A3 (en) 2011-09-01
JP2012531526A (en) 2012-12-10
AT507669B1 (en) 2010-07-15
AT507669A4 (en) 2010-07-15

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Application publication date: 20120523