CN1726293A - Catenary type furnace - Google Patents
Catenary type furnace Download PDFInfo
- Publication number
- CN1726293A CN1726293A CN 200380106157 CN200380106157A CN1726293A CN 1726293 A CN1726293 A CN 1726293A CN 200380106157 CN200380106157 CN 200380106157 CN 200380106157 A CN200380106157 A CN 200380106157A CN 1726293 A CN1726293 A CN 1726293A
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- furnace
- burner
- regenerative combustion
- catenary
- furnace shell
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 86
- 230000001172 regenerating effect Effects 0.000 claims abstract description 73
- 239000000463 material Substances 0.000 claims abstract description 60
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000000452 restraining effect Effects 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000007669 thermal treatment Methods 0.000 description 6
- 230000000740 bleeding effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 238000003079 width control Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
Images
Classifications
-
- 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
- C21D9/52—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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Tunnel Furnaces (AREA)
- Air Supply (AREA)
Abstract
An object of the present invention is to provide a catenary furnace which has high compatibility with environmental protection, is easy to maintain, and can satisfactorily perform heating treatment of a material by restraining fluctuations in furnace temperature. <>In the present invention, in a catenary furnace (1) for heating a material (3), which is formed in a shape of a catenary curve and is conveyed in the longitudinal direction of a furnace casing (2), in the furnace casing (2) heated by burners, a lower burner, which is fired continuously toward the transverse direction of the furnace casing (2), is provided on the lower side of the material (3), and an alternate combustion type regenerative burner (5, 6), which has a pair of burners (5a, 5b, 6a, 6b) burned alternately and is fired toward the longitudinal direction of the furnace casing (2), is provided on the upper side of the material (3).
Description
Technical field
The present invention relates to a kind of Catenary type furnace, this Catenary type furnace and environment protection highly compatible are safeguarded easily, and can be satisfactorily to processed material is heat-treated by the fluctuation that suppresses furnace temperature.
Background technology
As a kind of Catenary type furnace of horizontal stove in the furnace shell of burned device heating to treated material being carried out the thermal treatment such as annealing.The furnace shell of Catenary type furnace forms along the longitudinal ruler modest ability of the direction that transmits corresponding to material and short along the lateral dimension of a pair of furnace sidewall qualification, so that the width of matching materials.Material is spurred by horizontal pull and transmits along the longitudinal direction of furnace shell.
In this transport process, as shown in Figure 7, material (a) is because its deadweight overcomes the pulling force that is used to transmit material (a) and bending, and be used between the support rollers (b) of propping material (a) thereon saggingly, occurring forming the catenary curve of catenary sagging (c) thus with considerable sag of chain (h).In addition, the ordinary burner of the general type burner of the material that acts on this catenary curve shape of heating.A large amount of burners is arranged in the upside of material and downside from a furnace sidewall to another furnace sidewall and towards the stove width, material is from the heat radiation heating of the furnace wall of upside and burned device of downside and burner flame heating thus.
In aforesaid traditional Catenary type furnace with this furnace shell structure, the width of furnace shell is narrower, with the width of matching materials.Therefore, if the capacity of burner increases to obtain bigger heat input, burner flame becomes greater than the lateral dimension of furnace shell, therefore with conflict towards its other furnace sidewall.Thereby other furnace wall is overheated, and refractory materials is damaged thus.
In light of this situation, the input of the heat of burner must be limited with corresponding with the width dimensions of furnace shell.Therefore, the burner with lower volume is arranged in a plurality of modes traditionally, to guarantee necessary heat input.Yet traditional ordinary burner has problems aspect the measure that prevents waste gas, and has lower energy conservation characteristic.Therefore, use a large amount of this burner and environment protection incompatible, and expected to constitute the furnace shell structure that is provided with the burner that replaces above-mentioned ordinary burner.
From the viewpoint of burner performance, can expect using for example regenerative combustion device that is called alternate combustion type regenerative combustion device of document 1 (TOKKYO bunken patent documentation 1) disclosure.As everyone knows, the regenerative combustion device alternately to carry out a pair of burner of burn operation and bleeding, is arranged on the heat reservoir in each burner by positioned opposite, and the selector valve formation that is used to switch operation of combustors.The heat reservoir is saved heat in burner exhaust operating period from waste gas, and when operation switches to burn operation the heat reservoir heating flame air of savings heat.Therefore, regenerative combustion device and environment have good consistency.
Furnace shell structure can be arranged on the furnace sidewall by this regenerative combustion device that will replace above-mentioned ordinary burner and be positioned at the upside of material and downside is constructed and formed.
[TOKKYO bunken patent documentation 1] Japanese Patent open (patent disclosure) No.10-267262
Yet, when the regenerative combustion device only is when replacing ordinary burner to be used according to the furnace shell structure of traditional Catenary type furnace, although increased the effect of protection environment, bad heat treated shortcoming of material and maintenance of the equipment complicated problems to have occurred relating to.
Particularly, in the design furnace shell, to the input of the needed heat of regeneratory furnace by the preheating temperature of the calorific loss of the required heat of heating material, waste gas, combustion air, determine from the calorific loss of furnace wall etc., and the heat input that needs of each stove in the regeneratory furnace to compare with above-mentioned common burner be about twice.If attempt to guarantee the heat input of twice, the length of flame of burner is elongated naturally.Therefore, as under the situation of traditional ordinary burner, furnace sidewall superheated problem has appearred.
Therefore, even under the situation of regeneratory furnace, the input of its each heat must be limited, with the width dimensions of coupling furnace shell.Heat input in order to ensure needs as under the situation of ordinary burner, must be provided with a large amount of regeneratory furnaces.Particularly under the situation of regeneratory furnace, if its quantity increases, the quantity of the supplementary unit such as selector valve and heat storer will increase.Thereby not only apparatus processing increases but also maintenance service also increases.
In addition, under the situation of regeneratory furnace, owing to relate to the switching controls of burner, so furnace temperature fluctuation is bigger, thus material hot treatment can be adversely affected.
Summary of the invention
The present invention is intended to address the above problem with correlation technique; and correspondingly the purpose of this invention is to provide a kind of Catenary type furnace; this Catenary type furnace has the highly compatible with environment protection, safeguard easily, and fluctuation that can be by suppressing furnace temperature is satisfactorily to heat-treating treated material.
The invention provides a kind of Catenary type furnace that is used for heating material, this material form the catenary curve-like and in the furnace shell of burned device heating the longitudinal direction along furnace shell transmit, it is characterized in that comprising, lower burner, this burner is towards the horizontal direction continuous burning of described furnace shell, and is arranged on the downside of described material; And alternate combustion type regenerative combustion device, this alternate combustion type regenerative combustion utensil has the burner of a pair of alternate combustion, towards the burning of the longitudinal direction of described furnace shell, and is arranged on the upside of described material.
Because alternate combustion type regenerative combustion device is towards the longitudinal direction burning of furnace shell, therefore the regenerative combustion device is compared with the situation that the regenerative combustion device is arranged along the stove width and can be burnt with the heat input of needs, and be not subjected to the restriction of the lateral dimension of furnace shell, so the quantity of regenerative combustion device can be as the integral body of furnace shell structure and reduce.In addition, the regenerative combustion device is as the burner that is positioned at the material upside, and on the other hand, the lower burner of continuous burning is arranged on the downside of material.Therefore, even because lower burner also continuous burning during the blocked operation of regenerative combustion device, therefore furnace temperature can keep substantially constant, can suppress the furnace temperature fluctuation that the switching controls of regenerative combustion device causes thus, and the temperature distribution that can keep material satisfactorily, thereby can carry out proper heat treatment.
In addition, owing to can reduce the quantity of regenerative combustion device, the therefore maintenance service that can alleviate the supplementary unit such as selector valve and heat reservoir.In addition, utilize to handle exhaust and the good regenerative combustion device in energy-conservation aspect and can strengthen consistency with the environment of Catenary type furnace.
In addition, Catenary type furnace according to the present invention is characterised in that setting a group by two described regenerative combustion devices of forming, between each the described paired burner that described furnace shell is remained on described regenerative combustion device from the width of described furnace shell.Thus, also can be by two regenerative combustion devices along stove width control furnace temperature, the temperature along the stove width can be consistent thus.
In addition, Catenary type furnace according to the present invention is characterised in that described regenerative combustion device is set to a plurality of along the longitudinal direction of described furnace shell.Therefore,, can guarantee and the highly compatible of environment protection, safeguard easily as whole Catenary type furnace, and the high-performance that is used for material hot treatment.
Moreover Catenary type furnace according to the present invention is characterised in that the heat input in described regenerative combustion device of independent control and the described lower burner.Thus, can optimize furnace.
In addition, Catenary type furnace according to the present invention is characterised in that described furnace shell has a plurality of Control for Kiln Temperature district that arranges along the delivery direction of described material, described regenerative combustion device and described lower burner are arranged in the described temperature-controlled area at the upstream side of delivery direction, and the burner that is arranged in side and continuous burning is arranged in the described Control for Kiln Temperature district in the downstream side of delivery direction.Therefore, material can need the bigger upstream side of heat input to be reproduced burner and lower burner suitably heats, thereby Catenary type furnace can reasonable disposition.
In addition, Catenary type furnace according to the present invention is characterised in that described regenerative combustion device is the diffusion combustion type.Thus, can reduce the discharging of nitrogen oxide.
Description of drawings
Fig. 1 is the schematic plan view of describing according to a preferred embodiment of Catenary type furnace of the present invention;
Fig. 2 is the side-view at the Catenary type furnace shown in Fig. 1;
Fig. 3 is the Control for Kiln Temperature district of describing according to a plurality of Catenary type furnaces of the present invention;
Fig. 4 is described in alternate combustion type regeneratory furnace to be arranged under the situation with the upside of treated material and downside the curve of the relation between burner combustion operation and the furnace temperature;
Fig. 5 is the curve that is described in the relation of the burn operation of each burner in the Catenary type furnace shown in Fig. 1 and furnace temperature;
Fig. 6 is the schematic plan view that is described in the variation of the Catenary type furnace shown in Fig. 1;
Fig. 7 is the diagrammatic side view of delivery status of describing the material of Catenary type furnace heating.
Embodiment
Describe a preferred embodiment below with reference to accompanying drawings in detail according to Catenary type furnace of the present invention.Catenary type furnace is configured to usually along providing a plurality of Control for Kiln Temperature district with the longitudinal direction that transmits the corresponding furnace shell of direction of treated material.Fig. 1 and 2 shows the Control for Kiln Temperature district (S) according to the Catenary type furnace 1 of this embodiment.As in traditional example, form the furnace shell 2 of the Catenary type furnace 1 of this embodiment, thereby its longitudinal ruler modest ability and its lateral dimension (W) are short, with the width of matching materials 3.Material 3 in the furnace shell 2 of burned device heating with the shape of catenary curve, in the longitudinal direction transmission of furnace shell 2, be heated.
On the other hand, known alternate combustion type regenerative combustion device 5 and 6 with burner 5a, 5b, 6a and 6b of a pair of alternate combustion is arranged as along the longitudinal direction of furnace shell 2 toward each other, and longitudinal direction burning towards furnace shell 2, burner flame pointed to the longitudinal direction of furnace shell 2 when in other words, their burnt.In the example shown in the figure, paired burner 5a, 5b, 6a and 6b along the longitudinal direction setting of furnace shell 2 furnace shell 2 is remained on therebetween, because they are arranged in the top of furnace sidewall 2a along opposite direction.Yet certainly, paired burner 5a, 5b, 6a and 6b can be arranged as along the longitudinal direction of furnace shell 2 toward each other with respect to the installation site of the regenerative combustion device 5 of furnace shell 2 and 6 by suitable selection.
Especially in this embodiment, two regenerative combustion devices 5 and 6 are set to one group and furnace shell 2 is remained on therebetween.As everyone knows, regenerative combustion device 5 and 6 paired burner 5a, 5b, 6a and 6b alternately carry out burn operation and bleeding according to the blocked operation of selector valve.Particularly, when when burner 5a, 6a along the upstream side of the delivery direction of material 3 carry out burn operation, burner 5b, 6b in the downstream side carry out bleeding.When burner 5b, the 6b in downstream side are transformed into burn operation owing to blocked operation, carry out bleeding at burner 5a, the 6a of upstream side.Thus, stove is operated, and the while heat is stored in the heat reservoir and combustion gases are heated.
For the regenerative combustion device 5 that is subjected to this switching controls and 6 and the lower burner 4 of continuous burning, they each heat input is controlled separately.As regenerative combustion device 5 and 6, diffusion combustion type burner is preferred for keeping combustor flame temperature lower by in furnace shell fuel and combustion air being mixed with each other, and has temperature dependent nitrogen oxides emission thereby reduced.
In Catenary type furnace 1 according to this embodiment, as shown in Figure 3, be arranged in along some Control for Kiln Temperature districts (Sa) of the upstream side in a plurality of Control for Kiln Temperature district (S) that the delivery direction of material 3 is provided with continuously, by regenerative combustion device 5 and 6 and a plurality of burner combination of forming of burner 4 repeat setting along the longitudinal direction of furnace shell 2.In each Control for Kiln Temperature district (Sa), independent control regenerative combustion device 5 and 6 and each heat input of lower burner 4.On the other hand, in some Control for Kiln Temperature districts (Sb) that are arranged in the downstream side, be provided with and be arranged in lateral known burner 7.These burners 7 continuous burning during the thermal treatment of material 3.
Below, will the operating process of the Catenary type furnace 1 of this embodiment be described.By the thermal treatment of execution material 3 continuously the process that the upstream side of material 3 along the longitudinal direction of furnace shell 2 from Control for Kiln Temperature district (S) transmits to the downstream side of Control for Kiln Temperature district (S) of the Catenary type furnace 1 of burner heating.Alternate combustion type regenerative combustion device 5 in the Control for Kiln Temperature district of upstream side (Sa) and 6 repeats the operation of the paired burner 5a of alternate combustion, 5b, 6a and 6b, and on the other hand, lower burner 4 continuous burnings.
In this embodiment, because alternate combustion type regenerative combustion device 5 and the 6 longitudinal direction burnings towards furnace shell 2, so these regenerative combustion devices 5 are compared and can not limited by the lateral dimension (W) of furnace shell 2 with required heat input burning with the situation that the regenerative combustion device is arranged towards the stove width with 6.Therefore regenerative combustion device 5 and 6 quantity can reduce as the integral body of furnace shell structure.
In the configuration that utilizes regenerative combustion device 5 and 6, if being arranged in the upside of material and all burners of downside once was aforesaid regenerative combustion device, when the input of the heat of needs hour, as shown in Figure 4, the time period (Ta) of all burner cease combustions takes place.If the furnace temperature that the burning of regenerative combustion device causes according to this stand-by time section (Ta) descends and begins, the furnace temperature greatly fluctuation owing to wave (shown in the α among Fig. 4) usually.
On the contrary, in the Catenary type furnace 1 of this embodiment, burner as the upside that is positioned at material 3, adopt regenerative combustion device 5 and 6, and on the other hand, the lower burner 4 of continuous burning is arranged on the downside of material 3, thereby as shown in Figure 5, lower burner 4 is a continuous burning even a time period (Tb) during the blocked operation of regenerative combustion device 5 and 6, and furnace temperature can keep constant in fact thus.Therefore, furnace temperature fluctuation (shown in the β among Fig. 5) that the blocked operation by regenerative combustion device 5 and 6 causes and the temperature distribution that can keep material 3 satisfactorily can be suppressed, suitable thermal treatment can be carried out thus.
In addition, owing to can reduce the quantity of regeneratory furnace 5 and 6, therefore can alleviate the maintenance of the supplementary unit that is used to be injected to regeneratory furnace 5 and 6 selector valves that are provided with and heat reservoir.In addition, utilize to handle exhaust and the good regenerative combustion device 5 and 6 in energy-conservation aspect, can strengthen consistency with the environment of Catenary type furnace 1.
Moreover, because for the horizontal direction of furnace shell along furnace shell 2 remained on therebetween, and the paired burner 5a, 5b, 6a and the 6b that make regenerative combustion device 5 and 6 are provided with two burners as a group, therefore also can be by each heat input of these two regenerative combustion devices 5 of independent control and 6 along stove width control furnace temperature, thus can unanimity along the temperature of stove width.In addition, because furnace can be optimized in independent control regenerative combustion device 5 and 6 and each heat input of lower burner 4 therefore.
Moreover, arrange the Control for Kiln Temperature district (Sa) of regenerative combustion device 5 and 6 and regenerative combustion device 5 and 6 with of the longitudinal direction setting of a plurality of modes because be provided with a large amount of being used to, so aforesaid operations and effect can both realize as single Control for Kiln Temperature district (S) but also as whole Catenary type furnace 1 not only along furnace shell 2.In addition, because regenerative combustion device 5 and 6 and lower burner 5 be arranged in the Control for Kiln Temperature district (Sa) at upstream side along the delivery direction of material 3, and the side burner 7 of continuous burning is arranged in the Control for Kiln Temperature district (Sb) in the downstream side of the delivery direction of material 3, therefore material 3 can need the bigger upstream side of heat input by regenerative combustion device 5 and 6 and lower burner 4 suitably heat, thereby can reasonably dispose Catenary type furnace 1.
In the above-described embodiments, as an example described about regenerative combustion device 5 and 6 be provided with two burners as one group furnace shell 2 is remained on therebetween situation along horizontal direction.Yet certainly, as shown in Figure 6, a regenerative combustion device can be arranged in each Control for Kiln Temperature district (S).
In a word, very high according to Catenary type furnace of the present invention with the consistency of environment protection, safeguard easily, and by the fluctuation that suppresses furnace temperature heating material suitably.
Claims (6)
1, a kind of Catenary type furnace that is used for heating material, this material form the catenary curve and in the furnace shell of burned device heating the longitudinal direction along furnace shell transmit, it is characterized in that comprising
Lower burner, this burner be towards the horizontal direction continuous burning of described furnace shell, and be arranged on the downside of described material; And alternate combustion type regenerative combustion device, this alternate combustion type regenerative combustion utensil has the burner of a pair of alternate combustion, towards the burning of the longitudinal direction of described furnace shell, and is arranged on the upside of described material.
2, Catenary type furnace according to claim 1 wherein is provided with a group by two described regenerative combustion devices of forming, between each the described paired burner that described furnace shell is remained on described regenerative combustion device from the width of described furnace shell.
3, Catenary type furnace according to claim 1 and 2, wherein said regenerative combustion device is arranged to a plurality of along the longitudinal direction of described furnace shell.
4, according to each the described Catenary type furnace in the claim 1 to 3, the wherein heat of each in described regenerative combustion device of independent control and described lower burner input.
5, according to each the described Catenary type furnace in the claim 1 to 4, wherein said furnace shell has a plurality of Control for Kiln Temperature district that arranges along the delivery direction of described material, described regenerative combustion device and described lower burner are arranged in the described temperature-controlled area at the upstream side of delivery direction, and the burner that is arranged in side and continuous burning is arranged in the described Control for Kiln Temperature district in the downstream side of delivery direction.
6, according to each the described Catenary type furnace in the claim 1 to 5, wherein said regenerative combustion device is the diffusion combustion type.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003006356A JP4278990B2 (en) | 2003-01-14 | 2003-01-14 | Catenary furnace |
| JP6356/2003 | 2003-01-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1726293A true CN1726293A (en) | 2006-01-25 |
| CN100419097C CN100419097C (en) | 2008-09-17 |
Family
ID=32709059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801061572A Expired - Fee Related CN100419097C (en) | 2003-01-14 | 2003-12-02 | Catenary type furnace |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1584694B1 (en) |
| JP (1) | JP4278990B2 (en) |
| CN (1) | CN100419097C (en) |
| ES (1) | ES2394634T3 (en) |
| WO (1) | WO2004063403A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7452400B2 (en) | 2005-07-07 | 2008-11-18 | The North American Manufacturing Company, Ltd. | Method and apparatus for melting metal |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5824491B2 (en) * | 1980-07-16 | 1983-05-21 | 中外炉工業株式会社 | Processing material transport control method in catenary furnace |
| JPH0426722A (en) * | 1990-05-18 | 1992-01-29 | Nkk Corp | Catenary type continuous furnace for strip |
| JPH0554539A (en) | 1991-08-20 | 1993-03-05 | Sony Corp | Recording method and recording medium |
| JPH0554539U (en) * | 1991-12-19 | 1993-07-20 | 新日本製鐵株式会社 | Jig for steel wire passage in fluidized bed continuous heat treatment line |
| JP2788698B2 (en) * | 1992-11-24 | 1998-08-20 | 日本ファーネス工業株式会社 | Low NOx combustion method and its burner |
| JP3704177B2 (en) * | 1995-05-16 | 2005-10-05 | 新日本製鐵株式会社 | Continuous heating apparatus and heating method |
| JP3306580B2 (en) * | 1997-03-25 | 2002-07-24 | 日本鋼管株式会社 | Regenerative burner furnace |
| JP4237842B2 (en) * | 1998-03-05 | 2009-03-11 | 新日本製鐵株式会社 | Billet continuous heating device |
| CN2372327Y (en) * | 1999-05-11 | 2000-04-05 | 淄博中元工程有限公司 | Fuel (gas) tempering equipment for plate spring |
| FR2794132B1 (en) | 1999-05-27 | 2001-08-10 | Stein Heurtey | IMPROVEMENTS RELATING TO HEATING OVENS OF STEEL PRODUCTS |
| JP3962237B2 (en) * | 2001-10-25 | 2007-08-22 | 新日本製鐵株式会社 | Continuous heating furnace |
-
2003
- 2003-01-14 JP JP2003006356A patent/JP4278990B2/en not_active Expired - Fee Related
- 2003-12-02 ES ES03776019T patent/ES2394634T3/en not_active Expired - Lifetime
- 2003-12-02 EP EP03776019A patent/EP1584694B1/en not_active Expired - Fee Related
- 2003-12-02 WO PCT/JP2003/015394 patent/WO2004063403A1/en active Application Filing
- 2003-12-02 CN CNB2003801061572A patent/CN100419097C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1584694A4 (en) | 2006-03-22 |
| CN100419097C (en) | 2008-09-17 |
| EP1584694A1 (en) | 2005-10-12 |
| JP4278990B2 (en) | 2009-06-17 |
| EP1584694B1 (en) | 2012-09-05 |
| ES2394634T3 (en) | 2013-02-04 |
| WO2004063403A1 (en) | 2004-07-29 |
| JP2004218000A (en) | 2004-08-05 |
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Granted publication date: 20080917 |