EP3177746A1 - Four de rechauffage pour barres metalliques - Google Patents

Four de rechauffage pour barres metalliques

Info

Publication number
EP3177746A1
EP3177746A1 EP15756852.8A EP15756852A EP3177746A1 EP 3177746 A1 EP3177746 A1 EP 3177746A1 EP 15756852 A EP15756852 A EP 15756852A EP 3177746 A1 EP3177746 A1 EP 3177746A1
Authority
EP
European Patent Office
Prior art keywords
metal bars
module
advancement
combustion chamber
heating furnaces
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.)
Withdrawn
Application number
EP15756852.8A
Other languages
German (de)
English (en)
Inventor
Mario Barachetti
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.)
ICMI Srl
Original Assignee
ICMI Srl
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
Priority claimed from ITMI2015U000047U external-priority patent/ITMI20150047U1/it
Application filed by ICMI Srl filed Critical ICMI Srl
Publication of EP3177746A1 publication Critical patent/EP3177746A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • C21D9/0012—Rolls; Roll arrangements
    • 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
    • C21D9/0075—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/28—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity for treating continuous lengths of work
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/02—Skids or tracks for heavy objects
    • F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners

Definitions

  • the present invention relates to a module for heating furnaces for metal bars as well as to a heating furnace for metal bars which comprises one or more of said modules.
  • the present invention relates to a module for heating furnaces for metal products, such as steel bars, for molding line with hot cutting, as well as to the relative furnace. More in particular, the present invention relates to a heating furnace for metal products, such as steel bars, for molding line with hot cutting, wherein the bars are only heating using gas burners.
  • molding lines with hot cutting of metal bars have a heating furnace located upstream of the cutting station.
  • Known heating furnaces normally make use of mixed energy, which involves an initial continuous heating step in gas heating furnaces, wherein gas (usually methane or LPG) is burnt up to have a temperature of the bars of about 1100 °C, and a final heating step in induction furnaces, wherein the bars are brought to a temperature of about 1250 °C through circular section inductors.
  • gas usually methane or LPG
  • Gas heating furnaces of the known type normally have a combustion chamber formed by a tunnel extending longitudinally within which the metal bars are made to advance, through a system of horizontal rollers that have a V-shaped seat for housing said bars.
  • a plurality of gas burners face the tunnel and are usually oriented so as to direct the jet of the flame toward the surface of the bar.
  • the gas heating furnaces of the known type are not always able to provide the heat input required to bring the bars to the molding temperature of about 1250 °C in a cost-effective manner.
  • the non-optimal combustion and the presence of oxygen inside the tunnel involves phenomena of surface oxidation of the bars that would be highly desirable not to have.
  • Another problem of the heating furnaces of the known type is related to the transport system based on horizontal rollers with V-shaped notch.
  • the side walls of the bar are supported by and in contact with the entire surface of the V-shaped notch. Since the peripheral speed of the roller at the V-shaped surface varies depending on the diameter, a sliding of the roller surface occurs on the side of the square bar, with rapid wear of the rollers and consequent need for maintenance/replacement work.
  • the heating furnaces of the known type are considerably bulky and are difficult to adapt to different operational needs (for example, shapes and dimensions of the bars).
  • the main task of the present invention is to provide a heating furnace for metal bars that overcomes the drawbacks and problems described above.
  • an object of the present invention is to provide a heating furnace for metal bars which allows using only gas as a source of heat input, eliminating the need for the final electromagnetic induction heating.
  • Another object of the present invention is to provide a heating furnace for metal bars that has a higher thermal efficiency compared to the current furnaces that use gas heating, with consequent saving on costs.
  • Yet another object of the present invention is to provide a heating furnace for metal bars wherein there is a reduced oxidation of the surface of the bar.
  • Yet another object of the present invention is to provide a heating furnace for metal bars wherein there is improved uniformity of heating between the surface and the core of the material to be heated, resulting in increased product quality, in particular for alloy steels.
  • Another object of the present invention is to provide a heating furnace for metal bars that is usable with a wide range of round or square section bars.
  • a further object of the present invention is to provide a heating furnace for metal bars wherein the phenomena of wear by sliding of the advancement rollers of said bars is prevented.
  • Yet another object of the present invention is to provide a heating furnace for metal bars that is standardized and able to be easily adapted to the numerous and variable requirements of potential customers.
  • Yet another object of the present invention is to provide a heating furnace for metal bars that is easily transportable, even in containers, with reduced time of installation.
  • Yet a further object of the present invention is to provide a heating furnace for metal bars that is already ready for future upgrades for any increases in production.
  • Last but not least, another object of the present invention is to provide a heating furnace for metal bars that has high reliability and is easy to manufacture at competitive costs.
  • module for heating furnaces for metal bars which is characterized in that it comprises:
  • a combustion chamber with longitudinal development along an advancement direction, delimited by a body of refractory material and having an inlet section and an outlet section;
  • At least a pair of burners with a first and a second burner which face into said combustion chamber above said advancement plane;
  • said first and second burner being both inclined in the direction of said inlet section with respect to a transverse plane perpendicular to said advancement direction.
  • the geometry of the chamber and the position of the burners are such as to form a spiral of circular cross section with "the flame” of the burners and the related combustion products which surrounds the bar to be heated.
  • the jet exiting each burner is not oriented directly toward the bar and toward the center of the combustion chamber but along a direction tangential to the section of the combustion chamber.
  • the orientation of the burners and of the related jet is not perpendicular to the advancement direction of the bars but inclined and in countercurrent with respect to their advancement direction. In this way, a uniform spiral circulation of the fumes inside the combustion chamber is generated, in countercurrent to the advancement direction of the bars, with a resulting increase in the combustion and heat exchange efficiency.
  • a module for heating furnaces thus conceived allows a considerable reduction of the phenomena of oxidation on the surface of the bars, as these are completely enveloped by the combustion fumes and are not in contact with the oxygen contained in the atmosphere, which is the main element of the oxidation of the bars.
  • the modules for heating furnaces for metal bars have the advantage of exploiting a primary energy source, i.e. gas, of greater availability compared to the availability of electric current, which moreover requires transformation cabins from the line distribution voltage (medium voltage) to the use voltage.
  • the customer has an availability of electric energy that can be used for other purposes.
  • a widely preferred embodiment of the module for heating furnaces for metal bars provides for the presence of a plurality of pairs of first and second burners that face in said combustion chamber above said advancement plane and which are oriented and inclined as described above.
  • the angle formed by the axes of said first and second burner, measured from the top of the module should preferably be less than 180°, more preferably between about 70° and about 110°, for example 90 + 5°.
  • said first and second burner have the same inclination with respect to said transverse plane perpendicular to said advancement direction. Moreover, preferably, the point of facing of said first and second burner in said combustion chamber lies on a same transverse plane perpendicular to said advancement direction.
  • the first and second burners of each pair of burners are specularly arranged with respect to a longitudinal plane passing by said advancement direction.
  • the spiral of hot fumes that is formed around the bars to be heated is more uniform.
  • Alternative embodiments, in which said first and second burners of each pair of burners are arranged offset, are however possible.
  • a particularly preferred embodiment of a module for heating furnaces for metal bars provides for said combustion chamber to have a substantially circular section.
  • said means for supporting and advancing comprise at least a pair of rollers and preferably a plurality of rollers, with a first and a second roller which enter into said combustion chamber above said advancement plane and with their respective axes converging in a point below said advancement plane, the lateral surfaces of said first and second roller defining a support surface for said metal bars.
  • said first and second roller are preferably arranged symmetrically with respect to a longitudinal vertical plane passing through said advancement direction and perpendicular to said advancement plane.
  • the bars are preferably supported by pairs of inclined rollers arranged on the roof of the furnace and with axes converging in a point below the advancement plane of the bars inside the combustion chamber.
  • the rollers have a cooling system with internal circulation of water.
  • the inclined position and the circular shape of the rollers allows having a constant peripheral speed of the lateral surfaces of said first and second roller that form the support surface for the advancing bars, making it possible to advance also the bars with square section without the occurrence of scraping between the lateral surface of the roller, which constitutes the support surface for the bar, and the surface of the bar itself.
  • a module for heating furnaces for metal bars comprises means for supporting and advancing said bars comprising at least a pair of rollers rotating about respective axes of rotation, said axes being converging at a point below the advancement plane of the bars in the combustion chamber, at least a portion of the lateral surface of said rollers defining a support surface for said bars, the peripheral speed of the lateral surfaces of said rollers at said support surface being the same along all of said support surface.
  • the present invention also relates to a module for heating furnaces for metal bars, which is characterized in that it comprises:
  • a combustion chamber with longitudinal development along an advancement direction, delimited by a body of refractory material and having an inlet section and an outlet section;
  • At least a pair of burners with a first and a second burner which face into said combustion chamber above said advancement plane;
  • said means for supporting and advancing said metal bars comprising a pair of rollers with a first and a second roller which enter into said combustion chamber above said advancement plane and with their respective axes converging in a point below said advancement plane, the lateral surfaces of said first and second roller defining a support surface for said metal bars.
  • the convergence of the axis of said first and second roller is considered with regard to their projection on a transverse plane perpendicular to said advancement plane.
  • one of said rollers of said pair of rollers is inclined toward said inlet section and the other one of said rollers of said pair of rollers is inclined toward said outlet section.
  • the inclination of the rollers placed on the roof of the furnace with respect to the section perpendicular to the axis of the advancement direction of the bars allows to obtain a movement according to a helicoidal generatrix that, in addition to the advancement of the bars, causes a rotation of the bars on their own axis.
  • the rotation of the bars around their axis increases the heating uniformity of the bars within the furnace and allows to perform a uniform and controlled cooling on the bars at the exit of the furnace.
  • the rotation of the bars on their axis allows to perform uniform and homogeneous cooling treatments on the bars at the exit of the furnace, thereby reducing their possible deformation.
  • the new solution eliminates all the dimensional constraints for the chamber due to the V-rollers with a horizontal axis, resulting in a notable increase in the efficiency of the system and in an important economic saving of the cost of the rollers.
  • said burners comprises a flameless burner and/or an oxygen-based burner.
  • the so-called "flameless" burners are based on a combustion process of a particular type in which the combustion air and the fuel are locally mixed with the products of combustion which are suitably recirculated. In this way there is provided a process of complete oxidation of the fuel by the combustion, without the formation of a flame front, providing a high thermal uniformity inside the combustion chamber.
  • combustion occurs with the absence of a flame defined and apparent during the course of the reaction of combustion, since the combustion reaction is distributed within the reaction chamber and not more concentrated on a front of flame.
  • the enlargement of the region of combustion causes a marked homogenization temperature which results, in turn, a flattening of the temperature peaks responsible, among other things, the formation of nitrogen oxides of thermal origin.
  • oxygen-based flameless burners In order to reduce the risk of a flame particularly intense at high temperature that may occur with the oxygen-based burners, while ensuring a high uniformity of temperature and reducing the consumption of fuel, it is highly preferable to use in the module according to the present invention oxygen-based flameless burners.
  • jets of oxygen are injected at high speed by generating a rapid mixing of these with the fumes inside the furnace, with a high turbulence and a peak temperature lower than conventional oxygen systems, while ensuring a great energy efficiency.
  • the present invention also relates to a heating furnace for metal bars which comprises one or more modules as described.
  • the number of modules, as well as the number of pairs of burners in each module, can vary according to the needs.
  • figure 1 shows a perspective view of an embodiment of a module for heating furnaces for metal bars according to the present invention
  • figure 2 shows a perspective view of a longitudinal section of a module for heating furnaces for metal bars according to the embodiment in figure 1 ;
  • figure 3 shows a first plan view of a transverse section of a module for heating furnaces for metal bars according to the embodiment in figure 1 ;
  • figure 4 shows a perspective view of a transverse section of a module for heating furnaces for metal bars according to the embodiment in figure 1 ;
  • figure 5 shows a second plan view of a transverse section of a module for heating furnaces for metal bars according to the embodiment in figure 1 ;
  • figure 6 shows a lateral view with cut-out portions of a module for heating furnaces for metal bars according to an alternative embodiment of the present invention
  • figure 7 shows a top plan view of a heating furnace for metal bars comprising a plurality of modules according to the present invention.
  • a module for heating furnaces for metal bars comprises, in its most general embodiment, a combustion chamber 2 with longitudinal development along an advancement direction 4 of the bars.
  • the bars can have different shapes and sizes.
  • They can for example be bars with a circular section, both with relatively small diameter 101 and with relatively larger diameter 102, or bars with a square section 103.
  • the combustion chamber 2 is delimited by a body of refractory material 3 and has an inlet section 20 and an outlet section 200 along said advancement direction 4.
  • burners 12 are provided, with a first 11 and a second 12 burner which face into said combustion chamber 2 above said advancement plane 6.
  • the term "burner" refers to both the actual burner and to the relevant conduit formed in the body of refractory material 3 which flows into said combustion chamber 2.
  • module 1 for heating furnaces for metal bars 101, 102, 103 is given by the fact that axes 110 and 120 of said first 11 and second 12 burner are oriented tangentially with respect to said combustion chamber 2. This constitutes a first significant difference compared to the furnaces of the known type, in which the burners are substantially oriented toward the bars, that is to say, towards the center of the combustion chamber.
  • module 1 for heating furnaces for metal bars 101, 102, 103 is given by the fact that axes 110 and 120 of said first 11 and second 12 burner are both inclined in the direction of said inlet section 20 with respect to a transverse plane 5 perpendicular to said advancement direction 4.
  • burners 11, 12 are inclined and in countercurrent with respect to the advancement direction 4 of bars 101, 102, 103.
  • the position and orientation of the burners are such as to generate a spiral pattern of the flame of the burners and of the related combustion products around bars 101, 102, 103 advancing within the combustion chamber 2, with the consequent advantages in terms of increase in the heat exchange and reduction of oxidative phenomena.
  • modules 1 for heating furnaces for metal bars 101, 102, 103 comprise a plurality of pairs 11, 12; 21, 22; 31, 32, 41, 42, 51, 52 of first 11, 21, 31, 41, 51 and second 12, 22, 32, 42, 52 burners.
  • pairs 11, 12; 21, 22; 31, 32, 41, 42, 51, 52 of first 11, 21, 31, 41, 51 and second 12, 22, 32, 42, 52 burners.
  • there are five pairs of burners but their number may be different depending on the application requirements.
  • a preferred embodiment of a module 1 for heating furnaces for metal bars 101, 102, 103 provides that the angle formed by the axes of said first 11, 21, 31, 41, 51 and second 12, 22, 32, 42, 52 burner is less than 180°.
  • the first 11, 21, 31, 41, 51 and second 12, 22, 32, 42, 52 burners of each pair of burners 11, 12; 21, 22; 31, 32; 41, 42; 51, 52 need not be exactly opposite one another (and therefore with the respective axes at 180°) but oriented so as to form an angle different from 180°.
  • the angle between axes 110 and 120 of burners 11 and 12 is about 90°. Values in the range between 70 and 110°, for example 90 + 5°, are to be considered preferred. As is apparent from figure 3, for the purposes of the present invention, the angle formed by axes 110 and 120 of said first 11 and second 12 burner must be understood as measured from the top of module 1.
  • a preferred embodiment of a module 1 for heating furnaces for metal bars 101, 102, 103 provides that said first 11, 21, 31, 41, 51 and second 12, 22, 32, 42, 52 burner have the same inclination with respect to a transverse plane 5 perpendicular to said advancement direction 4.
  • the axes of the first burners 11, 21, 31, 41, 51 are parallel and angled with respect to the transverse plane 5, in countercurrent with respect to the advancement direction 4, and the second burners 12, 22, 32, 42, 52 are also parallel and angled, with respect to the transverse plane 5, in countercurrent with respect to the advancement direction 4.
  • the point of facing of the first 11, 21, 31, 41, 51 and second 12, 22, 32, 42, 52 burners inside the combustion chamber 2 preferably lies on a same transverse plane 5 perpendicular to said advancement direction 4.
  • the first burner 11, 21, 31, 41, 51 is arranged specularly to the second burner 12, 22, 32, 42, 52 with respect to a longitudinal plane passing through said advancement direction 4.
  • a particularly preferred and advantageous embodiment of a module 1 for heating furnaces for metal bars 101, 102, 103, according to the present invention provides for the combustion chamber 2 to have a substantially circular section.
  • the regular geometry of the combustion chamber 2 contributes to ensuring, together with the orientation of burners 11, 12; 21, 22; 31, 32; 41, 42; 51, 52, the uniform spiral pattern of the flame and of the combustion products within the same, with the advantages mentioned several times.
  • a particular embodiment of a module 1 for heating furnaces for metal bars 101, 102, 103 provides that said means for supporting and advancing comprise at least a pair of rollers 61, 62 with a first 61 and a second 62 roller which enter into said combustion chamber 2 above said advancement plane 6 and which rotate about a respective axis 610, 620.
  • axes 610, 620 of the first 61 and second 62 roller are converging at a point below said advancement plane 6 and at least a portion of the lateral surfaces 65, 66 of said first 61 and second 62 roller defines a support surface for said metal bars 101, 102, 103.
  • the peripheral speed of the lateral surfaces 65 and 66 of said rollers 61 and 62 at the support surface of bars 101, 102, 103, and in particular of the square bars 103 is constant and is the same along all of the support surface, thus preventing the typical phenomena of scraping and wear of the means for supporting and advancing of the conventional type.
  • a module 1 preferably comprises a plurality of pairs of first and second rollers.
  • modules 1 comprise two pairs 61, 62; 71, 72, of first 61,71 and second 62, 72 rollers; it is of course possible to use three or more pairs of rollers for each module, depending on the length of the same module and/or on the length of the bars to be machined.
  • the module 1 for heating furnaces for metal bars 101, 102, 103 in addition to the first pair of rollers 61 and 62, the module 1 for heating furnaces for metal bars 101, 102, 103 according to the present invention further comprises at least a second pair of rollers, with a third 611 and a fourth 621 roller which enter into said combustion chamber 2 above said advancement plane 6.
  • the third roller 611 is inclined in the opposite direction with respect to said first roller 61
  • the fourth roller 621 is inclined in the opposite direction with respect to said second roller 62.
  • the means for supporting and advancing of the type described can also be used in furnaces in which the burners are arranged in a conventional manner or in any case, in a manner other than as described in the present document.
  • Modules for heating furnaces and heating furnaces which comprise means for supporting and advancing as described above constitute a further aspect of the present invention.
  • Modules 1 for heating furnaces for metal bars 101, 102, 103, according to the present invention are conveniently used for making furnaces that comprise one or more of said modules 1. These furnaces also constitute an aspect of the present invention.
  • furnace 100 in its most typical embodiment, generally comprises an inlet station of the bars, with direct inlet 301 (parallel to the advancement direction 4) or lateral inlet 302 (perpendicular to the advancement direction 4) of the bars, a plurality of heating modules 1 of the type described above and a hear cutting station 303.
  • furnace 100 comprises six modules 1, each of which has five pairs of burners and two pairs of rollers for supporting and advancing.
  • furnace 100 has a different number of modules 1, which in turn can have a different number of pairs of burners and pairs of rollers for supporting and advancing.
  • the module for heating furnaces for metal bars achieves its tasks and objects.
  • the module for heating furnaces for metal bars according to the invention finds convenient application mainly in molding lines with hot cutting of metal bars but the principle can be used in other industrial processes where the heating of bars is required, for example in heat treatment lines (hardening, cleaning, tempering and the like) of metal bars.
  • Shape and size of the module for heating furnaces for metal bars according to the present invention can be the most varied according to the needs and requirements.
  • the module for heating furnaces for metal bars according to the present invention is relatively simple in construction and can be implemented using a relatively limited number of components.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Tunnel Furnaces (AREA)

Abstract

L'invention concerne un module (1) destiné à des fours de réchauffage (10) pour barres métalliques (101, 102, 103) et qui comprend : une chambre de combustion (2) s'étendant longitudinalement dans une direction de progression (4) et qui est délimitée par un corps de matériau réfractaire (3), et comporte une partie d'entrée (20) et une partie de sortie (200) ; des moyens pour soutenir et faire avancer lesdites barres métalliques (101, 102, 103) le long de ladite direction de progression (4), de ladite partie d'entrée (20) à ladite partie de sortie (200) sur un plan de progression (6) aménagé dans ladite chambre de combustion (2) ; au moins une paire de brûleurs (11, 12), un premier (11) et un second (12) brûleur se situant en regard de ladite chambre de combustion (2) au-dessus dudit plan de progression (6). Les axes desdits premier (11) et second (12) brûleurs sont orientés tangentiellement par rapport à la chambre de combustion (2) ; lesdits premier (11) et second (12) brûleurs sont tous deux inclinés dans la direction de la partie d'entrée (20) par rapport à un plan transversal (5) perpendiculaire à la direction de progression (4).
EP15756852.8A 2014-08-08 2015-08-10 Four de rechauffage pour barres metalliques Withdrawn EP3177746A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITMI20141476 2014-08-08
ITMI2015U000047U ITMI20150047U1 (it) 2015-02-27 2015-02-27 Forno di riscaldo per manufatti metallici in barra
PCT/EP2015/068367 WO2016020546A1 (fr) 2014-08-08 2015-08-10 Four de rechauffage pour barres metalliques

Publications (1)

Publication Number Publication Date
EP3177746A1 true EP3177746A1 (fr) 2017-06-14

Family

ID=54014772

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15756852.8A Withdrawn EP3177746A1 (fr) 2014-08-08 2015-08-10 Four de rechauffage pour barres metalliques

Country Status (2)

Country Link
EP (1) EP3177746A1 (fr)
WO (1) WO2016020546A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113549749A (zh) * 2021-07-24 2021-10-26 南通泰德电子材料科技有限公司 一种高纯铝棒均质装置及均质方法
CN113862450B (zh) * 2021-09-27 2023-03-31 山东建筑大学 一种棒材燃气加热装置及方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3203433C2 (de) * 1982-02-02 1984-08-09 Friedrich Wilhelm Dipl.-Ing. 7761 Moos Elhaus Anwärmofen für langgestrecktes Gut
IT1179616B (it) * 1984-04-20 1987-09-16 Olivotto Spa Procedimento per la tempra di elementi metallici allungati
DE3418603C1 (de) * 1984-05-18 1985-03-21 Schweizerische Aluminium Ag, Chippis Anwaermofen fuer zylindrische Gueter
DE10327487A1 (de) * 2003-06-17 2005-01-05 Expert Engineering Gmbh Verfahren zum Behandeln von Stranggussstangen oder Stranggussbolzen
ITTO20060074A1 (it) * 2006-02-03 2007-08-04 Olivotto Ferre S P A Forno a gas per il riscaldamento in continuo di barre metalliche

Non-Patent Citations (2)

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Title
None *
See also references of WO2016020546A1 *

Also Published As

Publication number Publication date
WO2016020546A1 (fr) 2016-02-11

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