• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The subject of this invention is a method of heat treatment of a metal strip (1), wherein the metal strip (1) is continuously heated by means of hot gas (6) in a preheating zone (3) and subsequently in a directly fired one Furnace is further heat treated in a reducing and / or oxidizing atmosphere. According to the invention, the metal strip (1) is preheated in the preheating zone (3) with hot shielding gas (6) and further heated with an electric heating system (5) before entering the directly fired furnace (B). The subject of this invention also forms a furnace zvr implementation of the method according to the invention.
    公开号:AT517848A4
    申请号:T50332/2016
    申请日:2016-04-15
    公开日:2017-05-15
    发明作者:Borrel Pierre-Jerome；Blake Eric
    申请人:Andritz Tech And Asset Man Gmbh；
    IPC主号:
    专利说明:

    PROCEED!! ond gfeh & mxage for warmth of metällbmdebi
    The subject of this invention is a method for heat treatment of a metal strip, wherein the metal strip with. The hot strip is preheated by hot gas in a preheat zone and the metal strip is then further heat treated in a direct fired furnace in a reducing and / or oxidizing atmosphere. The subject of this invention is also a furnace plant for carrying out the method according to the invention.
    The heat treatment of Metal.1 tapes is often done before galvanizing the Mritallband.es or even, in annealing furnaces after a pickling line,
    One way to heat treatment is. the use of direct fired furnaces (DFF) where the burners are placed "directly" inside the furnace.
    In. In these furnaces, there is a preheating zone in which the continuously passing metal strip is preheated by means of the hot exhaust gases from the direct-fired furnace to approximately 200 ° -300 ° C. The metal strip 'has, before the heat treatment, an oxide layer which is caused, for example, by the rinsing water of the pickling section. This oxide layer consists essentially of kef-t (iron (III) oxide, hematite) and. Fe304 (magnetite).
    In the preheating this Oxidschicbt continues to build, as in the exhaust gases of the direct-fired furnace oxygen and water vapor are still present. However, this Ox.idsch.ic.ht is disturbing because it hinders the diffusion of oxygen into the base material in a subsequent internal oxidation in the direct-fired furnace.
    By diffusion of oxygen into the base material, silicia aura can be formed which serves as a diffusible barrier for the silicon, which is advantageous.
    The metal strip is therefore subsequently subjected to a reducing atmosphere in the kiln-fired furnace according to the prior art, for which purpose the burners are operated with a fuel excess, i. under air or oxygen deficiency: so that the combustion products have a high CO and Ra content and thus have a reducing effect. The disturbing iron oxide layer is thereby removed ...
    Subsequently, at the end of the direct-fired furnace, the metal strip is subjected to an oxidizing atmosphere at high temperatures, thereby achieving internal oxidation of the alloying elements such as silicon or manganese. In addition, FeO {Wü st.it) is also formed.
    However, with conventional direct-fired furnace or, at high production rates, the time remaining for internal oxidation is quite short, this can negatively affect the product quail tat,
    The object of the invention is to provide a method for heat treatment of metal strips, in which the reactions in the direct-fired furnace are improved, in particular the internal oxidation of silicon and manganese in the base material.
    This object is achieved by a method according to claim 1. According to the invention, the metal strip is preheated in the preheating zone with hot shielding gas and further before it in the direct-fired furnace (DFF) eiltrift with an electric heating system, preferably with an indukricnsr, further heated "
    By preheating the metal strip in an inert gas atmosphere, the build-up of an undesirable Ox can be erased and prevented by the electric heating system in front of the directly heated furnace, the inlet temperature of the metal strip in the plants can be increased, preferably to over 500 ° C. Due to the higher inlet temperature of Meta 11 ban des; stands more conductive for the chemical reactions in the direct-fired furnace, such as reduction or oxidation; to disposal.
    In particular, the internal oxidation of the base metal of the metal strip can be better controlled or carried out more efficiently,
    Vorzugswerse the metal strip is heated in the preheating zone using hot nitrogen at more than 200 * C, preferably up to 300 * 0. Thereafter, the metal strip is further heated by the heating system to more than 350 ° C, preferably to more than 5 ° C.
    It is favorable if the electric heating system heats the metal in an atmosphere of inert gas, in a nitrogen atmosphere, for example. But Hs is also conceivable; that the electric heating system heats the metal strip in a slightly reducing atmosphere, preferably in a stock atmosphere with 2-3¾ of water.
    The heat of the hot exhaust gases of the directly fired furnace can be used for the preheating of the shielding gas for preheating purposes, Di: heat of the exhaust gases is also hur
    Preheating the combustion air for burners of the direct fired furnace uses Vierden.
    The subject of the invention also forms a furnace according to claim 8 for carrying out the method. This furnace system has a preheating zone in which the metal strip is preheated by means of hot gas and a subsequent direct fired furnace for further heat treatment of the metal strip. According to the invention, the hot gas is a protective gas, preferably nitrogen, and in addition, after the preheating zone and before the directly-fired furnace, an electric heating system is arranged to further increase the temperature of the metal strip,
    It is favorable if the electric heating system is an induction heating or if the atmosphere within the electric heating system is a protective gas atmosphere.
    In the following an embodiment of the invention will be described with reference to two drawings. Show it:
    Fig. 1 shows a schematic structure of the furnace system;
    FIG. 2 shows a schematic structure of the heat recovery system of the furnace installation; FIG.
    Identical Bezugssseichen in the two figures each denote the same Aniagenteile or material flows.
    In Figure 1, the metal strip 1 passes continuously with an inlet temperature of about 50 ° C via a seal roller pair 2 in the preheating zone 3 of the furnace and is heated there with the aid of hot nitrogen 6 to about 200 ° C. The hot nitrogen 6 is blown directly onto the metal strip 1 via ©. ifmienkwalzen 4 lead the metal baad 1 through the oven unit. Following the dig preheating zone 3, the metal strip 1 with Ulfe an electrical Induktionshei tion 5 in a achutzgasatmosphäre further heated to approximately 500 * C. Nitrogen is also introduced into this area via the line 7. Thereafter, the motive belt enters the directly fired furnace 3, where it is further heated in the region 8a, before it reaches the reduction scene ..... 8b at approximately 720C a: reducing atmosphere ton of Oxidschichi freed: will. Immediately thereafter, the bare metal strip 1 is exposed to approximately 76000 of an omnidirectional atmosphere, in which preferably internal oxide precipitates are deposited in the base material, thereby forming silicon oxide. Afterwards, the Metal Iband leaves the kiln plant by means of the sealing roll npa a r 2 and is thereafter, for example, after a further heat treatment "and cooling of a galvanically galvanized layer.
    In Pi gur 2 is the Wärmerückgcwίηnung the furnace system of Figure 1 dargeste 1.1t. The hot exhaust gases 11 from the direct-fired furnace 8 are here supplied with combustion 1.uft 13: anq e r e c h e r t u n d a N a c h ve rb 9 tion, in the two heat exchangers 10 a and; 10b and in the boiler 12, heat will escape from the hot exhaust gases 11 before they are discharged via the chimney .1.4. Of course, can be done before a corresponding emission control.
    In the first heat exchanger 10a, the combustion air 13 for the burner is called open 8 dpreh the: 950 ° C hot exhaust gases to about 56Ö ° Q heated. In the second heat exchanger 10b, the nitrogen from the preheating zone is heated from 350 * C back to <15Q ° C and fed back to the preheating zone for heating the metal strip 1.
    Since the metal strip '1 is partially wetted on its surface with water or hydrocarbons when entering the preheating zone 3, water vapor and hydrocarbons would accumulate in the preheating zone 3 in the case of a closed nitrogen loop pattern. To avoid this, a part of the nitrogen is removed from the preheating zone 3 and replaced by fresh nitrogen, as indicated by the two arrows in Fig. 2 da r, gesi.e.1.1.t a, st.
    权利要求:
    Claims (5)
    [1]
    claims
    A method of heat treatment of a metal strip (1), wherein the metal strip (1) is preheated in a preheating zone (3) by hot gas (6) and the metal strip ί1} is then heated in a direly fired furnace (8) In addition, in a reducing and / or oxidizing atmosphere, the wound lumen L is characterized in that the metal strip (1) is preheated in the heating zone (30 with hot shielding gas (6) and before it enters the direct-fired furnace (8) e I ektrische heating system (5), preferably: with a I nduktx ο nsheiz ung g, is further heated.
    [2]
    2. The method according to claim 1, characterized in that the metal strip (1) in the protective zqasatmosphäre the preheating zone (3) is heated to more aia 2000C, vorx uqswei.se up to 300 ° C.
    [3]
    3. The method according to claim 2, characterized in that the metal strip (1) is heated by the electric heating system to more than 330%, preferably to more than 500 '%.
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the e: ektrische heating system (5) the metal strip (!) In a protective gas atmosphere. preferably in a SLicksfoffatxosph & re, heated :,: | :, Method according to one of claims 1 to 3, characterized in that the electric heating system {5) · the metal strip (1) in a reducing atmosphere, preferably .in egg nor S t i. 6 k Dislocation according to one of Claims 1 to 5, characterized in that # the heat of the AbQ3se (1.1: of the rek t-fired © fens ( B} is used for the warning of the protective gas (6) for the preheating gates (3),
    [7]
    7, method according to one of claims 1 to 6, characterized in that the heat from the exhaust gases (11) of the direct-fired furnace (8j for the heating of the combustion air (13) for the burners of the direct-fired furnace (8) 8i Furnace for heat treatment of metal strips (1) with a prewarning zone (3) into which hot gas (6) can be fed for preheating and with a subsequent directly fired furnace {8) for further heat treatment of the metal strip (1), characterized in that the hot gas (6) is a shielding gas and that after the preheating zone (34 and in front of the directly adjacent line (8) an electric helical sys - tem (51) is arranged to further increase the temperature of the A metal plant according to claim 7, characterized in that the electric heating system (5) is a domestic appliance (1: 0;) of oil (1) aqe (r) one of claims 8 or 9, characterized in that the atmosphere :: innerha lb e.iektrisehen heating system (5) is a protective zgasatmosprä re.
    类似技术:
    公开号 | 公开日 | 专利标题
    AT517848A4|2017-05-15|METHOD AND OVEN SYSTEM FOR HEAT-TREATING METAL TAPES
    AT507423A4|2010-05-15|Method for preheating annealing products in a hood-type annealing system having two annealing bases receiving the annealing products under a protective hood, where the annealing products are preheated using gaseous heat transfer medium
    DE102009052779A1|2011-05-12|Method for manufacturing stainless steel-cold strip or other high-alloyed materials, involves cold rolling stainless steel- warm strip in single-stage rolling process
    DE102008005259B4|2011-12-08|Process for saving energy in heat treatment plants with moved by heating and cooling part Good
    DE102009058917A1|2010-09-09|Method and plant for producing and / or processing a slab or a strip of metallic material
    DE1508407B1|1970-01-29|Method for heating steel bodies prior to their hot deformation
    EP2685193A1|2014-01-15|Method and rotary hearth furnace for heat treating workpieces
    DE60004049T2|2004-06-03|METHOD FOR PRODUCING A BODY MELT
    CN105463342B|2017-10-27|A kind of manufacture method of litzendraht wire
    DE881953C|1953-07-06|Process for bright annealing of metals
    US20180080110A1|2018-03-22|Elimination of zinc staining during heat treatment processing of zinc containing ferrous and non-ferrous alloys
    DE2756402C2|1982-11-04|Heat treatment furnace
    DE2041533A1|1972-03-30|Pellet production
    DE102015001438A1|2016-08-18|Flexible heat treatment plant for metallic strip
    DE488450C|1929-12-30|Process for uniform heating of metals or similar substances and for maintaining a uniform temperature by a circulating flow of heating gas
    DE590055C|1933-12-21|Process for reducing fuel consumption in metallurgical furnaces, in particular blast furnaces
    DE102021201616A1|2021-12-02|Process for the recrystallizing annealing of a non-grain-oriented electrical steel
    DE102018217835A1|2020-04-23|Process for producing a hot-formable steel flat product
    DE606780C|1934-12-10|Process for the uninterrupted step-by-step generation of hot wind for the operation of metallurgical ovens, e.g. B. blast furnaces
    DE3039424C2|1985-03-14|Burner-heated continuous furnace
    DE1686022U|1954-10-28|DEVICE FOR EVALUATING THE TEMPERATURE IN METALLIC BLOCKS.
    DE1180946B|1964-11-05|Process for the continuous removal of non-ferrous metals which form volatilizable chlorides from ores containing them
    DE624358C|1936-01-18|Process for making white cast iron malleable by annealing
    DE1047226B|1958-12-24|Process for burning and hardening pellets that contain iron in an oxidizable form
    DE646496C|1937-06-15|Primary winding for induction heating
    同族专利:
    公开号 | 公开日
    KR20180125518A|2018-11-23|
    EP3443133A1|2019-02-20|
    KR102172275B1|2020-11-02|
    AT517848B1|2017-05-15|
    US11193182B2|2021-12-07|
    US20190119777A1|2019-04-25|
    WO2017178200A1|2017-10-19|
    CA3021015C|2021-03-23|
    CN108884506A|2018-11-23|
    CN108884506B|2020-07-17|
    ES2776372T3|2020-07-30|
    CA3021015A1|2017-10-19|
    EP3443133B1|2019-12-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2504440A|1948-04-02|1950-04-18|Miess Fred|Heating continuously traveling metal strip|
    US3385946A|1965-04-16|1968-05-28|Westinghouse Electric Corp|Continuous annealing method and apparatus|
    US5770838A|1996-09-11|1998-06-23|Drever Company|Induction heaters to improve transitions in continuous heating system, and method|
    JP2002294347A|2001-03-28|2002-10-09|Nippon Steel Corp|Method and device for jet preheating strip continuous annealing facility|
    EP2133436A1|2007-04-05|2009-12-16|Nippon Steel Corporation|Method of continuous annealing for steel strip with curie point and continuous annealing apparatus therefor|
    US20130277896A1|2007-05-30|2013-10-24|Gdf Suez|Process and installation for heating a metallic strip, notably for an annealing|
    US20140147697A1|2011-07-15|2014-05-29|Tata Steel Nederland Technology Bv|Apparatus for producing annealed steels and process for producing said steels|WO2019011517A1|2017-07-13|2019-01-17|Andritz Technology And Asset Management Gmbh|Method for reducing nitrogen oxides in strip treatment furnaces|JPH0781167B2|1990-07-10|1995-08-30|新日本製鐵株式会社|Direct-fire continuous annealing method and apparatus for steel strip|
    FR2688802B1|1992-03-19|1994-09-30|Stein Heurtey|METHOD FOR THE HEAT TREATMENT OF METAL STRIPS.|
    FR2806097B1|2000-03-08|2002-05-10|Stein Heurtey|IMPROVEMENTS RELATING TO THE PREHEATING OF METAL STRIPS, PARTICULARLY IN GALVANIZING OR ANNEALING LINES|
    AT500686B1|2004-06-28|2007-03-15|Ebner Ind Ofenbau|METHOD FOR THE HEAT TREATMENT OF A METAL STRIP BEFORE A METALLIC COATING|
    JP5000116B2|2005-09-29|2012-08-15|新日本製鐵株式会社|Soaking furnace operation method in steel strip continuous treatment equipment|
    JP5043587B2|2007-10-12|2012-10-10|中外炉工業株式会社|Metal strip continuous heat treatment equipment|KR102326326B1|2019-12-17|2021-11-12|주식회사 포스코|Radiant Tube Apparatus and Method of Manufacture thereof|
    CN111623626A|2020-06-24|2020-09-04|苏州新长光热能科技有限公司|Continuous furnace and waste heat utilization method thereof|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50332/2016A|AT517848B1|2016-04-15|2016-04-15|METHOD AND OVEN SYSTEM FOR HEAT-TREATING METAL TAPES|ATA50332/2016A| AT517848B1|2016-04-15|2016-04-15|METHOD AND OVEN SYSTEM FOR HEAT-TREATING METAL TAPES|
    PCT/EP2017/056756| WO2017178200A1|2016-04-15|2017-03-22|Method and furnace installation for heat treating metal strip|
    ES17712958T| ES2776372T3|2016-04-15|2017-03-22|Procedure and furnace for heat treatment of metal tapes|
    CA3021015A| CA3021015C|2016-04-15|2017-03-22|Method and furnace plant for heat treatment of metal strip|
    KR1020187029578A| KR102172275B1|2016-04-15|2017-03-22|Furnace equipment and heat treatment method for heat treatment of metal strip|
    CN201780022619.4A| CN108884506B|2016-04-15|2017-03-22|Method and furnace arrangement for heat treatment of metal strip|
    US16/092,982| US11193182B2|2016-04-15|2017-03-22|Method and furnace installation for heat treating metal strip|
    EP17712958.2A| EP3443133B1|2016-04-15|2017-03-22|Method and furnace installation for heat treating metal strip|
    [返回顶部]