CN1326515A - 用于炼钢的带有中央装料炉身的直流电弧炉和方法 - Google Patents
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Abstract
为了提高炼钢用的直流电弧炉的生产能力,在减轻电炉的负荷下,设置至少两根从上插入电炉溶化室(2)的电极(7a,b)和至少一根炉底电极(8),由此生成两根斜向炉底中心的电弧(9a,b)。通过一个中央炉身(10)向上方延长,以此熔化室(2)导入熔化炉料(11)进入熔化室和形成了熔化炉料料柱。
Description
本发明涉及一种炼钢用的直流电弧炉,它包括至少带有两根产生电弧的电极和带有出钢口和出渣口的一个电炉熔化室。此外还涉及有关的生产方法。
已知有很多种炼钢方法,其中主要有两种技术路线,一种是通过传统的高炉—转炉生产路线,另一种是电炉炼钢路线。
在电炉炼钢中,一般在扁平圆柱形或椭圆形的熔化室中熔化废钢或熔化直接还原铁(海绵铁)。在电弧炉中一般通过回转的炉顶加料,炉料由从炉顶插入炉内的电极产生的电弧熔化。根据不同的炉型,出钢经过一个出钢槽或一个偏心出钢口进行。已知有两种电弧炉,一种AC炉(交流电流),另一种为DC炉(直流电流)。
传统的直流电弧炉具有一根石墨电极和一根炉底电极。所生成的电弧垂直向下到钢池。目前已知有两根石墨电极的直流电弧炉。传统的直流电弧炉具有下述缺点:
在熔化过程中电弧会发生偏转,这意味着对耐火材料产生很高的负荷。要求在扁平熔池中有很厚的泡沫渣层,以覆盖电弧和保护炉墙。
在装料过程中,生成的废气或灰尘是不可控制的。同样地在热炉气中废钢熔化后的铁氧化也是不可控制的。
此外由于废钢的崩落,造成电极的折断。
而且排出的炉气温度太低,为了阻止二噁烯的生成,必须重新加热炉气。这样在废气系统中要求设置附加的烧嘴。
在具有两根电极的直流电弧炉中,在炉盖区域的两根电极之间产生很强的热负荷。
本发明的目的是提供一种直流电弧炉和炼钢的方法,其中一方面提高了炉子生产率,另一方面降低了电炉负荷和对环境的污染。
根据本发明该目的是藉助权利要求1的直流电弧炉的特征和方法权利要求10的特征来实现的。本发明有利的结构将在从属权利要求中公开。
本发明建议,两根电极和至少一根炉底电极在炉子容器中布置的方法是,其产生两根电弧要倾斜朝向电炉炉底的中心,通过一个中心炉身熔化室向上方延长,导入炉料进行熔化室和形成炉料料柱。
在根据本发明特征的基础上达到了,两根电弧有控制地在熔化炉料下方燃烧。通过有目的的电弧偏转和事先设置的装料炉身,保证了炉料有控制、均匀地移动到熔化室中和高功率的熔化过程。在使用废钢时,一种较好、较快的废钢切断是可以实现的。
通过这个解决方案,使至目前为止传统石墨电极的功率140kVA或110MW成倍地增加是完全可能的,或者减小两根电极的直径和由此减少电极消耗也是完全可能的。
除了布置两根电极(阴极)和一根共同的炉底电极(阳极)外,也可设想设置两根阴极和两根阳极。阳极是炉底电极,它们被布置在炉底中心,这样形成两根斜向炉底中心的电弧。此外所有的实例均建议设置较多的电极,其中均要满足生成倾斜电弧的特征。
本发明的优点是,在加料炉身的基础上,废钢崩落从而电极折断都是可以避免的。
根据本发明,电极的布置方法是,它所产生的电弧不是垂直的,而是倾斜的。由此只要求很薄的渣层以覆盖电弧。
本发明还建议,为了同时对废气进行控制,在熔化室上部,炉身旁边设置炉口,用以设置抽取在装料过程中形成的灰尘和/或炉气的抽风设备;在炉身延长段中设置抽取熔化过程中产生的废气的抽风设备。
由于上述的设施,已有可能对装料过程的废气进行控制。通过藉助熔化室的抽风设备对炉气单独的抽取可以避免熔化炉料广泛的铁氧化。
有目的的废气控制同时带来的优点是,抽取在熔化过程中产生的废气通过炉身用来预热废钢,即废钢的预热是在抽取炉气通过炉身的过程中进行的。这样预热时间和由此产生的炉料铁氧化都是可控的。
本发明优选建议,炉身抽风设备和熔化室的抽风设备汇集于一根共同的抽取管中,并且为了在装料过程和熔化过程交替时,对两个抽风设备和废气气流进行交换,在炉身抽风设备和熔化室抽风设备之间设置换向装置。由此这两个抽风设备结合成一个设备,通过所建议的换向装置有可能,总是只有一个废气设备在运转或调整成一种组合的废气气流。对废气流和废气量的控制是可以实现的。本发明的抽风装置的有利结构是直接抽风,因此与所建议的炉身组合起来有可能对在加料、熔化和出钢时生成的烟气进行收集和除尘。
通过在炉身中废气气流方向的变化同样地可实现对废气温度的控制。通过两个废气流有控制地混合,加热炉气的温度高于生成二噁烯的温度也是可以达到的。
根据本发明,熔化室的上部除了具有炉身和用于插电极的炉口外,还具有用于熔化室抽风装置的炉口。本发明特别推荐,为插电极用的炉口与炉身的位置关系应使,炉身或通过炉身导入的炉料柱成为两根电极之间的热屏蔽或熔化室上部区域有强热源时,它们能作为遮挡体。
一个优选实施例的直流电弧炉由一个带有上部炉盖的下部熔化室组成,在炉盖上设置了所建议的各种炉口。
在一个更具体的实施例中,直流电弧炉装有熔化室抽风装置,它还包括两根向上延伸的管道,它们通入炉身抽风装置的一根管道中,其中在管道的过渡区域中设置了可旋转的阀板,如由耐热钢制成,它们可以控制当时的炉气气流和废气量。
此外,熔化室还设置有在熔化过程垂直插入电极和在装料阶段抽出电极的机构。
再有,在熔化室的内壁上设置煤气和氧气烧嘴,通过它们可根据要求达到更高的熔化效率。此外还可设置炉底喷嘴。
所建议的直流电弧炉与已公开型式的直流电弧炉比较其优点是,为了装料完全可以实现,无须旋转炉盖和炉气密封操作。
下面结合附图和权利要求对本发明的细节和优点作进一步的详细说明。
图1是带有抽风装置的电炉熔化室的侧视示意图。
图2是带有抽风装置的电炉熔化室的俯视示意图。
图3是显示装料过程废气气流方向的电炉熔化室的侧视示意图。
图4是显示熔化过程废气气流方向的电炉熔化室的侧视示意图。
图1显示一台由一直流电弧炉熔化室2和一废气抽风装置3组成的直流电弧炉1。熔化室2由一个熔化区域4和一个炉盖5组成。两根电极(阴极)7a,b通过在炉盖5上的炉口6插入熔化室中。在熔化室炉底上设置了一根在两根电极7a,b之间的炉底电极8。生成了两根斜电弧9a,b。斜电弧的长度用b表示,它长于一般直流电弧炉中垂直伸展的电弧长度(长度用a表示)。
在熔化室2的上部中央设置了一个炉身10。通过炉身10装入熔化料11,特别是废钢和海绵铁,进入熔化室2。通过电弧9a,b的能量所生成的钢液用12表示,炉渣用13表示。
在炉身10的延长段上有一台炉身抽风设备3.1。炉身抽风装置3.1由一个圆柱管14、抽风机和一个过滤设备(未画出)所组成。圆柱管14与旁边的两根导管15a,b结合,它们组成了电炉熔化室抽风装置3.2。在两个抽风设备3.1,3.2之间的接头处16的旁边设置了阀板17a,b形式的可旋转的换向元件。它们在一定的位置上可阻止通过熔化室抽风装置3.2的导管15a,b的废气气流,通过阀板17a,b的控制程序使它转到其它的极限位置,可以关闭炉身10上部抽风设备3.1。中间位置的调整是有可能的。
从图2的俯视图中,更清楚地观察所建议的带有炉身抽风管14的炉身10的布置,与炉身10相邻处设置了带有移动电极的机构18a,b的电极7a,b和熔化室抽风装置3.1的导管15a,b。图中示意表示了钢液的出钢槽19和出渣门20。
藉助所建议的炉气抽风装置3.1和3.2有可能对废气流进行控制。图3表示在装炉料11时,废气和灰尘流动过程(箭头流动过程),其中废气和灰尘通过熔化室抽风设备3.2的导管15a,b,再抽入总管21中。随后过滤设备(未画出)或回收设备以传统方式连接。
在熔化过程期间(图4),阀板17a,b关闭了熔化室抽风设备3.2的导管15a,b。在熔化过程生成的炉气,特别是燃烧氧化物,流过炉身10和废钢柱(见图4中的箭头过程)。
Claims (10)
1.炼钢用的直流电弧炉,包括一个电炉熔化室,它带有用以产生电弧的电极和带有为放钢、放渣用的出钢口、出渣口以及直接收集炉气的机构,其中至少布置两根由上插入电炉熔化室(2)的电极(7a,b)和至少一根炉底电极(8),生成两根斜向电炉炉底中心的电弧(9a,b);其中向上通过中央的炉身(10)延长了电炉熔化室(2),将炉料(11)输入熔化室(2),其特征在于,中央炉身的延长是用于形成炉料料柱;在熔化室上部与炉身相邻处设置炉口,它用来放置抽取在装料期间形成的灰尘和/或炉气的抽风设备(3.2);在炉身(10)延长段中设置的抽风设备(3.1)抽取在熔化期间的废气。
2.根据权利要求1所述的直流电弧炉,其特征在于,炉身抽风设备(3.1)和熔化室抽风设备(3.2)均汇集于一根共同的抽取管(21);并为了在装料过程和熔化过程交替两个抽风设备,设置机构(17a,b),在炉身抽风设备和熔化室抽风设备之间切换。
3.根据权利要求2所述的直流电弧炉,其特征在于,在电炉熔化室上部为插电极用的炉口(6)与炉身(10)的位置关系是应使炉身或通过炉身导入的炉料柱成为两根电极之间的热屏蔽。
4.根据权利要求3所述的直流电弧炉,其特征在于,电炉熔化室(2)由一个下部熔化区域(4)和一个上部炉盖(5)所组成,在炉盖上设置多个炉口。
5.根据权利要求2所述的直流电弧炉,其特征在于,熔化室抽风设备(3.2)包括两根向上伸展的导管(15a,b),它们再通入管道(14)形式的炉身抽风设备(3.1)中,其中在过渡区域(16)中设置可旋转的阀板(17a,b),它们可以控制当时的废气量和炉气气流。
6.根据权利要求3所述的直流电弧炉,其特征在于,备有机构(18a、b)在熔化阶段垂直插入或补送电极进入熔化室(2)中和在装料阶段取出电极。
7.根据上述权利要求中任一项所述的直流电弧炉,其特征在于,在熔化室的内壁上设置煤气或氧气烧嘴。
8.根据上述权利要求中任一项所述的直流电弧炉,其特征在于,熔化料(11)涉及废钢和直接还原铁。
9.在一台直流电弧炉中的炼钢方法,由上面装入炉料进入电炉熔化室,炉料藉助两根电极之间产生的电弧熔化,其中炉料(11)进入电炉熔化室(2)是通过设置在电炉熔化室上部中央的炉身(10)来进行,电极(7a,b)的主要熔化功率集中在炉身(10)下部的电炉炉底附近的区域,其中在熔化过程生成的废气藉助设置在炉身(10)上部的抽风设备(3.1)抽取,其特征在于,同时通过热废气流预热在炉身中随后移动的炉料料柱;在装料阶段生成的炉气和灰尘在此阶段通过一个电炉熔化室抽风设备(3.2)抽取。
10.根据权利要求9的炼钢方法,其特征在于,从电炉熔化室抽风设备(3.2)和炉身抽风设备(3.1)抽出的废气被一台共同的抽风装置(3)抽出。
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Application Number | Priority Date | Filing Date | Title |
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DE19846100A DE19846100C2 (de) | 1998-10-07 | 1998-10-07 | Gleichstromlichtbogenofen zur Herstellung von Stahl sowie Verfahren hierzu |
DE19846100.3 | 1998-10-07 |
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CN1326515A true CN1326515A (zh) | 2001-12-12 |
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CN99811863A Pending CN1326515A (zh) | 1998-10-07 | 1999-09-22 | 用于炼钢的带有中央装料炉身的直流电弧炉和方法 |
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US (1) | US6490312B1 (zh) |
EP (1) | EP1124995B1 (zh) |
JP (1) | JP2002526739A (zh) |
KR (1) | KR20010079989A (zh) |
CN (1) | CN1326515A (zh) |
AR (1) | AR023907A1 (zh) |
AT (1) | ATE220729T1 (zh) |
BR (1) | BR9914357A (zh) |
CA (1) | CA2346770A1 (zh) |
CZ (1) | CZ20011268A3 (zh) |
DE (2) | DE19846100C2 (zh) |
EG (1) | EG22547A (zh) |
HU (1) | HU222145B1 (zh) |
MX (1) | MXPA01003575A (zh) |
PL (1) | PL347027A1 (zh) |
RU (1) | RU2213919C2 (zh) |
SK (1) | SK4682001A3 (zh) |
TR (1) | TR200100969T2 (zh) |
TW (1) | TW504518B (zh) |
UA (1) | UA51849C2 (zh) |
WO (1) | WO2000020650A1 (zh) |
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CN112378269A (zh) * | 2020-11-13 | 2021-02-19 | 圣力(清远)钢制品有限公司 | 一种电炉系统 |
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DE102008060774B4 (de) * | 2008-12-05 | 2013-03-28 | Wiktor Raile | Schrottvorwärmungsprozess und Vorrichtungen in Stahlerzeugungsanlagen |
MX2011005635A (es) * | 2009-02-03 | 2011-06-24 | Siemens Ag | Procedimiento y dispositivo para regural la salida de monoxido de carbono de un horno de arco electrico. |
KR101320313B1 (ko) | 2011-12-14 | 2013-10-22 | 주식회사 포스코 | 전기로의 하부 전극 교체용 틸팅장치 |
WO2015181781A1 (en) * | 2014-05-30 | 2015-12-03 | Danieli & C. Officine Meccaniche S.P.A. | Apparatus to move and preheat metal material |
FI127179B (fi) * | 2015-09-15 | 2017-12-29 | Outotec Finland Oy | Menetelmä ja järjestely uuniprosessin ominaisuuksien seuraamiseksi ja prosessiseurantayksikkö |
IT201700072859A1 (it) | 2017-06-29 | 2018-12-29 | Danieli Off Mecc | Apparato di fusione per la produzione di acciaio |
RU2766937C2 (ru) * | 2020-07-07 | 2022-03-16 | Адель Талгатович Мулюков | Способ плавки конверторного шлама в дуговой печи постоянного тока |
DE102023100464A1 (de) | 2023-01-11 | 2024-07-11 | Thyssenkrupp Steel Europe Ag | Verfahren zum Betreiben eines Gleichstrom-Elektroofens zur Erzeugung einer Eisenschmelze und Flüssigschlacke |
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US1515967A (en) * | 1924-11-18 | Electric furnace | ||
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GB827205A (en) | 1955-08-31 | 1960-02-03 | Wenzel Werner | Electric reducing process and furnace for carrying out the process |
JP2600736B2 (ja) | 1987-12-24 | 1997-04-16 | 大同特殊鋼株式会社 | 直流アーク炉 |
FI79560B (fi) | 1988-02-22 | 1989-09-29 | Outokumpu Oy | Smaeltugn och foerfarande foer chargering av det material, som behandlas, in i den. |
AT396483B (de) * | 1991-11-18 | 1993-09-27 | Voest Alpine Ind Anlagen | Anlage und verfahren zur herstellung von stahl aus chargiergut |
AT401527B (de) | 1991-12-20 | 1996-09-25 | Voest Alpine Ind Anlagen | Verfahren zum einschmelzen von schrott, sowie vorrichtung zur durchführung dieses verfahrens |
DE4232913C2 (de) | 1992-10-01 | 1995-04-27 | Daimler Benz Ag | Zweistufiges Verfahren zum hydromechanischen explosionsunterstützen Tiefziehen von Blech und Tiefziehpresse zur Durchführung des Verfahrens |
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- 1999-09-22 AT AT99947405T patent/ATE220729T1/de not_active IP Right Cessation
- 1999-09-22 SK SK468-2001A patent/SK4682001A3/sk unknown
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- 1999-09-22 DE DE59902074T patent/DE59902074D1/de not_active Expired - Fee Related
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CN112378269A (zh) * | 2020-11-13 | 2021-02-19 | 圣力(清远)钢制品有限公司 | 一种电炉系统 |
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Publication number | Publication date |
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DE19846100C2 (de) | 2000-08-03 |
US6490312B1 (en) | 2002-12-03 |
EP1124995B1 (de) | 2002-07-17 |
JP2002526739A (ja) | 2002-08-20 |
BR9914357A (pt) | 2001-06-26 |
UA51849C2 (uk) | 2002-12-16 |
CA2346770A1 (en) | 2000-04-13 |
AR023907A1 (es) | 2002-09-04 |
KR20010079989A (ko) | 2001-08-22 |
PL347027A1 (en) | 2002-03-11 |
WO2000020650A1 (de) | 2000-04-13 |
RU2213919C2 (ru) | 2003-10-10 |
EG22547A (en) | 2003-03-31 |
HUP0103626A2 (hu) | 2002-01-28 |
EP1124995A1 (de) | 2001-08-22 |
CZ20011268A3 (cs) | 2001-09-12 |
DE19846100A1 (de) | 2000-04-13 |
TR200100969T2 (tr) | 2001-10-22 |
MXPA01003575A (es) | 2002-09-18 |
SK4682001A3 (en) | 2001-12-03 |
ATE220729T1 (de) | 2002-08-15 |
HUP0103626A3 (en) | 2002-02-28 |
HU222145B1 (hu) | 2003-04-28 |
DE59902074D1 (de) | 2002-08-22 |
TW504518B (en) | 2002-10-01 |
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