EP2167695A1 - Verfahren zur wärmebehandlung eines metallbandes - Google Patents
Verfahren zur wärmebehandlung eines metallbandesInfo
- Publication number
- EP2167695A1 EP2167695A1 EP08756831A EP08756831A EP2167695A1 EP 2167695 A1 EP2167695 A1 EP 2167695A1 EP 08756831 A EP08756831 A EP 08756831A EP 08756831 A EP08756831 A EP 08756831A EP 2167695 A1 EP2167695 A1 EP 2167695A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- muffle
- furnace part
- directly fired
- flue gases
- flue gas
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000003546 flue gas Substances 0.000 claims abstract description 56
- 239000011248 coating agent Substances 0.000 claims abstract description 7
- 238000000576 coating method Methods 0.000 claims abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 28
- 238000000137 annealing Methods 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 239000011261 inert gas Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 abstract description 10
- 230000001681 protective effect Effects 0.000 description 8
- 239000000446 fuel Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000001590 oxidative effect Effects 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- C21D9/0043—Muffle furnaces; Retort furnaces
-
- 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
- C21D9/561—Continuous furnaces for strip or wire with a controlled atmosphere or vacuum
-
- 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
- C21D9/562—Details
- C21D9/565—Sealing arrangements
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0222—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating in a reactive atmosphere, e.g. oxidising or reducing atmosphere
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating
- C23C2/0224—Two or more thermal pretreatments
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
-
- 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
Definitions
- the invention relates to a method for heat treatment of a metal strip in front of a metallic coating, wherein the metal strip is first heated in a directly fired furnace part using hot flue gases and then annealed in a furnace section having at least one muffle under a reducing inert gas atmosphere.
- annealing furnaces which have a directly fired furnace part for heating the steel strips in an oxidizing atmosphere and a subsequent furnace part, which is heated by means of jet pipes and contains a protective gas atmosphere.
- the flue gases from the directly fired kiln part are also used to preheat the steel strips, the supply of heat from the flue gases, at least in some operating conditions, exceeds the heat requirement for heating the steel strips before entering the directly fired kiln part, thus leaving some of them they enter the directly fired furnace section, so that part of this heat energy must remain unused for the heat treatment of the steel strips.
- the invention is therefore based on the object, a method for heat treatment of a metal strip in front of its metallic coating initially in an oxidizing flue gas atmosphere and then in a reducing inert gas atmosphere so that the available heat energy of the fuel used for the direct firing of the corresponding furnace part completely for the heat treatment the metal strip can be used.
- the invention solves the task by the fact that the muffle is heated by means of the flue gases from the directly fired furnace part.
- heat energy of the fuel used for heating the muffle can be used, which is therefore only supply additional heat energy when needed. Since the oxygen content of the flue gases in the region of the furnace part with the muffle on the muffle outside for the treatment of the metal strip under a reducing inert gas atmosphere within the muffle is irrelevant, the post-combustion of the fuel in the furnace part with the muffle under an advantageous supply of combustion air without danger for the bright annealing of the metal strip.
- protective gas from the muffle can be admixed with the flue gases in the directly fired furnace part, which is sufficient to maintain a furnace atmosphere sufficient for substoichiometric combustion oxidizing effect on the strip surface but advantageously facilitates low oxygen concentration.
- the afterburning of the flue gases can be carried out under superstoichiometric conditions while supplying additional combustion air in a flue gas chamber enclosing the muffle.
- the method it is possible to start from an annealing furnace with a directly fired furnace part and with a subsequent furnace part, which has at least one muffle enclosed by a smoke gas chamber. It only needs the directly fired furnace part in the downstream side of the flue gases to be connected via at least one flue gas line to the muffle enclosing flue gas chamber to apply the muffle as needed with the still hot flue gases from the directly fired furnace part.
- the muffle enclosing flue gas chamber can be used as a post-combustion chamber.
- additional heat energy of To feed muffle preferably by means provided in the flue gas chamber burners whose flue gases then mix with those from the directly fired furnace part. About such burners but could also be blown for cooling only air in the flue gas chamber.
- the annealing furnace shown has a furnace part 1 for preheating a metal strip 2 to be treated before its metallic coating in a melt or in an electrolytic bath, a directly fired furnace part 3 and a furnace part 4 with a muffle 5.
- the arrangement is made such that the metal strip 2 passes through the furnace part 1 from bottom to top and is deflected via a roller box 6 to directly fired furnace part 3, which is below via another roller box 7 with the muffle 5 in combination, so that the top emerging from the muffle 5 metal strip 2 can be withdrawn via a guide roller 8 through a channel 9.
- For direct firing of the furnace part 3 10 are provided in this burner, with their hot Flue gases in this furnace part 3 down-going metal strip 2 is heated in countercurrent.
- the directly fired furnace section 3 is connected on the downstream side of the flue gases through a flue gas duct 11 to a muffle 5 enclosing the flue gas chamber 12 through which the muffle 5 is heated, with the aid of the flue gases from the directly fired furnace part 3, as indicated by the dashed flow arrows is indicated. If the heat energy of this branched off into the flue gas chamber 12 flue gases is not sufficient for the respectively necessary heating of the muffle 5, the muffle 5 additional heat energy can be supplied.
- 12 burners 13 are provided in the flue gas chamber. With the help of these burners 13, a cooling could also be made when only air is blown into the flue gas chamber 12 via the burner nozzles.
- the furnace part 1 for the preheating of the metal strip 2 is also heated with the aid of the flue gases from the directly fired furnace part 3.
- a corresponding connecting line 14 is provided between the furnace parts 1 and 2.
- the branched off to preheat the metal strip 2 from the flue gases of the directly fired furnace part 3 amount of flue gas is adjusted by a control valve 15 in the connecting line 14.
- the pressure level in the furnace part 1 can be regulated by a throttle valve 16 in the flue gas outlet 17 of the furnace part 1.
- the control flap in the flue gas duct 11 is designated by 18.
- the throttle valve in the flue gas outlet 19 has the reference numeral 20.
- the heat treatment of the metal strip 2 in the muffle 5 is carried out under a protective gas atmosphere.
- the protective gas is passed in countercurrent to the metal strip 2 through the muffle 5 and passes over the lower roller box 7 in the directly fired furnace part 3, where the inert gas mixes with the flue gases.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0113507A AT505289B1 (de) | 2007-07-18 | 2007-07-18 | Verfahren zur wärmebehandlung eines metallbandes |
PCT/AT2008/000221 WO2009009809A1 (de) | 2007-07-18 | 2008-06-19 | Verfahren zur wärmebehandlung eines metallbandes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2167695A1 true EP2167695A1 (de) | 2010-03-31 |
EP2167695B1 EP2167695B1 (de) | 2017-05-31 |
Family
ID=39764261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08756831.7A Not-in-force EP2167695B1 (de) | 2007-07-18 | 2008-06-19 | Verfahren zur wärmebehandlung eines metallbandes |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2167695B1 (de) |
AT (1) | AT505289B1 (de) |
TW (1) | TW200914625A (de) |
WO (1) | WO2009009809A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012007292A1 (de) * | 2012-04-12 | 2013-10-17 | Linde Aktiengesellschaft | Verfahren und Behandlungsstrecke zum abschnittsweise Veredeln eines Metallprodukts |
AT520131A2 (de) * | 2017-07-13 | 2019-01-15 | Andritz Tech & Asset Man Gmbh | Verfahren zur reduktion von stickoxiden in bandbehandlungsöfen |
CN107639114A (zh) * | 2017-09-23 | 2018-01-30 | 芜湖恒泰有色线材股份有限公司 | 一种防止断丝的微细焊丝连续精拉设备 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE486640C (de) * | 1929-11-21 | Wilhelm Eckardt & Ernst Hotop | Zweistoeckiger Brennofen, bestehend aus einem unteren Muffelofen und einem oberen, durch die Feuergase des unteren Ofens beheizten Kammerofen | |
US3720546A (en) * | 1969-04-21 | 1973-03-13 | Nippon Steel Corp | Method for preventing destruction of strip metal in annealing furnace connected with direct heating furnace |
US4183983A (en) * | 1978-08-17 | 1980-01-15 | Selas Corporation Of America | Method for reducing metal oxide formation on a continuous metal sheet in the hot dip coating thereof |
AU538925B2 (en) * | 1979-04-16 | 1984-09-06 | Ak Steel Corporation | Finishing of hop dip coating of ferrous base metal |
US5023113A (en) * | 1988-08-29 | 1991-06-11 | Armco Steel Company, L.P. | Hot dip aluminum coated chromium alloy steel |
FR2720079B1 (fr) * | 1994-05-19 | 1996-06-21 | Lorraine Laminage | Procédé de revêtement d'aluminium par trempe à chaud d'une pièce, notamment d'une bande, en acier contenant au moins 0,1 % en poids de manganèse, notamment en acier inoxydable et/ou allié. |
JPH10168526A (ja) * | 1996-12-11 | 1998-06-23 | Daido Steel Co Ltd | 金属ストリップの連続焼鈍炉 |
FR2782326B1 (fr) * | 1998-08-13 | 2000-09-15 | Air Liquide | Procede de galvanisation d'une bande metallique |
AT500686B1 (de) * | 2004-06-28 | 2007-03-15 | Ebner Ind Ofenbau | Verfahren zur wärmebehandlung eines metallbandes vor einer metallischen beschichtung |
JP4797601B2 (ja) * | 2005-11-29 | 2011-10-19 | Jfeスチール株式会社 | 高強度溶融亜鉛めっき鋼板の製造方法および溶融亜鉛めっき鋼板の製造設備 |
-
2007
- 2007-07-18 AT AT0113507A patent/AT505289B1/de not_active IP Right Cessation
-
2008
- 2008-06-19 EP EP08756831.7A patent/EP2167695B1/de not_active Not-in-force
- 2008-06-19 WO PCT/AT2008/000221 patent/WO2009009809A1/de active Application Filing
- 2008-06-25 TW TW097123633A patent/TW200914625A/zh unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2009009809A1 * |
Also Published As
Publication number | Publication date |
---|---|
AT505289A4 (de) | 2008-12-15 |
TW200914625A (en) | 2009-04-01 |
EP2167695B1 (de) | 2017-05-31 |
WO2009009809A1 (de) | 2009-01-22 |
AT505289B1 (de) | 2008-12-15 |
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