EP2531623B1 - Gasspüleinrichtung - Google Patents

Gasspüleinrichtung Download PDF

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Publication number
EP2531623B1
EP2531623B1 EP10798729.9A EP10798729A EP2531623B1 EP 2531623 B1 EP2531623 B1 EP 2531623B1 EP 10798729 A EP10798729 A EP 10798729A EP 2531623 B1 EP2531623 B1 EP 2531623B1
Authority
EP
European Patent Office
Prior art keywords
gas
purging
purging device
zone
distribution chamber
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.)
Active
Application number
EP10798729.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2531623A1 (de
Inventor
Bernhard Handle
Bojan Zivanovic
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.)
Refractory Intellectual Property GmbH and Co KG
Original Assignee
Refractory Intellectual Property GmbH and Co KG
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
Application filed by Refractory Intellectual Property GmbH and Co KG filed Critical Refractory Intellectual Property GmbH and Co KG
Priority to PL10798729T priority Critical patent/PL2531623T3/pl
Publication of EP2531623A1 publication Critical patent/EP2531623A1/de
Application granted granted Critical
Publication of EP2531623B1 publication Critical patent/EP2531623B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B22D1/002—Treatment with gases
    • B22D1/005—Injection assemblies therefor
    • 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
    • F27D3/16—Introducing a fluid jet or current into the charge
    • 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
    • F27D3/18—Charging particulate material using a fluid carrier

Definitions

  • the invention relates to a gas purging device, as used for example in metallurgical melting vessels (such as converter, pan, Tundish) to inject a gas, optionally in combination with finely divided solids in a metallurgical melt.
  • metallurgical melting vessels such as converter, pan, Tundish
  • Gas purging devices usually consist of a refractory ceramic body, in which several channels (with a small flow cross-section) run in the axial direction of the gas purging device. The gas is supplied at one end, passed through the channels and discharged at the other end from the channels into the molten metal.
  • the path of the gas through a gas purging plug of directional porosity is largely linear and often in the axial direction of the gas purging device, although embodiments are known in which the passages are oblique and / or coiled relative to the axial direction of the gas purging device.
  • the refractory ceramic body In gas purging bricks with so-called "undirected porosity", the refractory ceramic body has a high open porosity.
  • the gas thus does not flow through this body along defined channels, but flows from pore to pore from the gas inlet side end to the gas outlet side end, but also this flow path takes place substantially in the axial direction of the gas purging device.
  • the axial direction of the gas purging device this means the main direction in which the gas flows through the purging device.
  • the axial direction is identical to the central longitudinal axis of the gas purging device.
  • Combinations of the mentioned embodiments of gas purging devices are also state of the art ( DE 37 16 388 C1 . DE3110204 A1 . EP233952 A1 ).
  • gas purging bricks with directed Porosity entails the risk of infiltration of molten metal into the gas purging plug along the channels. Similarly, this applies to joint washer.
  • Various measures have been proposed to stop penetrating molten metal. These include so-called breakthrough fuses, with the help of penetrating melt targeted away and / or frozen.
  • a long-proven embodiment results from the EP 0105868 B1
  • a certain disadvantage is that the break-through protection is an additional component to the gas purging plug.
  • the DE 763 185 C describes a method and apparatus for introducing powdered additives into a converter.
  • the transport of the powdery additives is carried out with the aid of a carrier gas in a wind box, is injected into the necessary air through a separate line, the mixture of carrier gas and air with the powdery additives is then promoted by the wind box via converter nozzles in the converter.
  • the invention is based on the object to offer a gas purging device of generic type, which creates a high safety standard and reliably prevents a breakthrough of molten metal.
  • the basic idea of the invention is to design the gas purging device with at least two rinsing zones which, although they can run directly next to one another, are supplied with gas separately.
  • the further idea of the invention consists in using the purge gas supplied to a purge zone, at the same time cooling a gas conduit associated with a further purge zone. This cooling is in normal operation the gas flushing device not necessary; However, it creates the possibility, in the case of infiltration of molten metal in this gas line to freeze the molten metal and thus further penetration of the molten metal and destruction of the Gas purifier to prevent.
  • the invention relates to a gas purging device having a first rinsing zone, which is supplied with gas from a first gas line, and a second rinsing zone, which is supplied with gas by a second gas line, wherein the first and second rinsing zones extend in the axial direction of the gas rinsing device and the first gas conduit has a subsection extending at an angle of 90 ° ⁇ 45 ° to the axial direction of the gas purging device and arranged so as to surround this subsection with the gas supplied via the second gas conduit.
  • the flow direction of the molten metal will basically correspond to the axial direction of the gas purging device.
  • a diversion and thus a slowing down of the flow velocity take place.
  • the reduction of the flow velocity and the increase of the contact surface between said portion and said cooling gas can be optimized if the corresponding portion extends more or less perpendicular (perpendicular) to the axial direction of the gas purging device and is as long as possible.
  • the portion of the first gas conduit may have a ring shape or the shape of a part of a ring.
  • An alternative embodiment provides to make the section of the first gas line meandering.
  • the affected section of the first gas line to be cooled can be guided through a second gas distribution chamber, into which the second gas line opens and from which the second rinsing zone extends.
  • the second gas distribution chamber fulfills a plurality of functions. Firstly, it serves to distribute the gas supplied via the second gas line and thus equalize the pressure conditions before the gas is introduced into the second rinse zone.
  • the volume of the gas distribution chamber can be used to receive the section of the first gas line to be cooled, so that this section can be surrounded on all sides with cooling gas.
  • the cooling effect and thus the safety of the gas purging device is increased if the second gas distribution chamber has no direct fluidic connection to the first rinsing zone. This can be achieved, for example, by sealing the first gas line, with the exception of the partial section to be cooled, with respect to the second gas distribution chamber.
  • the partial section of the first gas line to be cooled can run between sections of the gas line which are aligned with one another.
  • a first, more or less rectilinear, gas supply end of the gas line said subsection joins, for example, in a design that is similar to a ring portion or meandering and opens into another, gas outlet side portion of the gas line, which is aligned with the gas inlet side End of the gas line runs.
  • the gas supplied via the first gas line can open into a first gas distribution chamber from which the first rinsing zone extends.
  • first gas distribution chamber from which the first rinsing zone extends.
  • the first rinse zone may be made of a refractory ceramic material and may have directional or non-directional porosity. It is also possible to form a first purge zone of directional porosity and a second purge zone of undirected porosity. Likewise, both rinse zones may each have directional or non-directional porosity.
  • the gas purging device according to the invention can be formed with more than two rinsing zones, with further rinsing zones either via the gas lines for the first and second rinsing zone are supplied. Or it is possible to provide additional rinse zones via separate gas lines with gas and / or gas / solid mixtures.
  • the arrangement of the individual rinsing zones is basically not critical. However, a compact embodiment results when the second rinse zone concentrically surrounds the first rinse zone.
  • the central, axially extending first rinsing zone can be formed with directed porosity and surrounded by a more or less cylindrical second rinsing zone with undirected porosity.
  • Both rinsing zones can be supplied with gas at the gas inlet end via a respectively assigned gas distribution chamber, wherein according to the invention a gas line runs through a gas distribution chamber and is cooled by the gas, which is flushed in via a further gas line there.
  • the gas flushing device according to FIG. 1 has a cylindrical shape; It could also be designed frustoconically analogous. Concentric with the center longitudinal axis MM, a first cylindrical rinsing zone 10 is provided, along which a plurality of slit-like channels 12 extend from a gas supply-side end 10u to a gas outlet-side end 10o. Below the first rinse zone 10, a first gas distribution chamber 14 is arranged.
  • a second rinse zone 20 Concentric with the first rinse zone 10, there is a second rinse zone 20 of so-called undirected porosity around it, the refractory of this second rinse zone 20 again extending from a gas supply end 20u to a gas outlet end 20o. Below the annular cylindrical second rinsing zone 20, a second gas distribution chamber 24 runs.
  • the gas purging device is surrounded by a metal jacket 30, which merges into a bottom 32, which simultaneously forms lower boundary walls for the gas distribution chambers 14, 24, which are separated from one another by a metal cylinder 34.
  • the second gas distribution chamber 24 opens a second gas line 26 which passes (gas-tight) through the bottom 32 and ends at a distance from the lower end 20u of the second rinse zone 20 so that the gas in the second gas distribution chamber 24 distributed and from there into the open porosity of the second rinse zone 20 can be introduced.
  • the gas then flows through the second rinse zone 20 (in the figure: from bottom to top, ie in the axial direction of the gas purging device), until it leaves the gas purging device at 20 o.
  • a first gas line 16 also opens into the second gas distribution chamber 24, whereby it (gas-tight) passes through the bottom 32, but then continues to run continuously and indeed semicircular in the second gas distribution chamber 24, said portion carries the reference numeral 16t, and then with another Section 16z in the direction of the partition wall 34, passes through this (gas-tight) and then opens in the first gas distribution chamber 14 a.
  • the gas supplied via the line 16 thus flows initially in the axial direction of the gas purging device, is then deflected at 16u, flows substantially perpendicular to the previous flow direction through the second gas distribution chamber 24 before the gas exits in the first gas distribution chamber 14, distributed there and flows through the channels 12 of the first rinse zone 10 from the gas inlet end 10u to the gas outlet end 10o this rinse zone 10 and then leaves.
  • the second gas line 16 is not guided here in the manner of a ring section through the second gas distribution chamber 24. Rather, the subsection 16t extends in a straight line through the second gas distribution chamber 24 and the dividing wall 34 into the first gas distribution chamber 14, adjoined by the first purging zone 10 of directed porosity.
  • the partial section 16t to be cooled extends at an angle of 90 ° ⁇ 45 ° to the axial direction of the gas purging device, the axial direction being defined as the direction corresponding to the main flow direction of the gas, ie substantially parallel to the central longitudinal axis MM the gas purging device, or in other words, the direction between gas inlet side sections 10u, 20u and gas outlet side sections 10o, 20o of the rinse zones 10, 20.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Details (AREA)
  • Furnace Charging Or Discharging (AREA)
EP10798729.9A 2010-02-05 2010-12-11 Gasspüleinrichtung Active EP2531623B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10798729T PL2531623T3 (pl) 2010-02-05 2010-12-11 Urządzenie do przepłukiwania gazem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010007126A DE102010007126B3 (de) 2010-02-05 2010-02-05 Gasspüleinrichtung
PCT/EP2010/007568 WO2011095193A1 (de) 2010-02-05 2010-12-11 Gasspüleinrichtung

Publications (2)

Publication Number Publication Date
EP2531623A1 EP2531623A1 (de) 2012-12-12
EP2531623B1 true EP2531623B1 (de) 2014-10-08

Family

ID=43923518

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10798729.9A Active EP2531623B1 (de) 2010-02-05 2010-12-11 Gasspüleinrichtung

Country Status (9)

Country Link
EP (1) EP2531623B1 (ja)
JP (1) JP5711269B2 (ja)
KR (1) KR20120116456A (ja)
CN (1) CN102725427B (ja)
DE (1) DE102010007126B3 (ja)
ES (1) ES2522532T3 (ja)
PL (1) PL2531623T3 (ja)
WO (1) WO2011095193A1 (ja)
ZA (1) ZA201205605B (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102899446A (zh) * 2012-11-16 2013-01-30 重庆赛迪工业炉有限公司 一种吹扫装置
EP2942406B1 (de) * 2014-05-05 2016-04-13 Refractory Intellectual Property GmbH & Co. KG Feuerfestes keramisches Gasspülelement

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763185C (de) * 1938-06-14 1953-02-09 August Thyssen Huette A G Verfahren und Vorrichtung zum Einbringen von Zusatzstoffen in den Konverter
DE1027582B (de) * 1953-08-31 1958-04-03 Dynamidon Werk Engelhorn & Co Verfahren zur Herstellung von hochfeuerfesten Steinen
JPS5721667U (ja) * 1980-07-09 1982-02-04
DE3110204A1 (de) * 1981-03-17 1982-10-14 Didier-Werke Ag, 6200 Wiesbaden Vorrichtung zum einfuehren von gasen in metallurgische gefaesse
AT376455B (de) * 1982-10-06 1984-11-26 Oesterr Amerikan Magnesit Metallurgischer ofen oder metallurgisches gefaess
DE8437953U1 (de) * 1984-12-24 1985-09-19 Steuler Industriewerke GmbH, 5410 Höhr-Grenzhausen Gaszuleitungsrohr von Gasspüleinheiten für Stahlgußpfannen
US4754954A (en) * 1986-01-29 1988-07-05 Lazcano Navarro Arturo Refractory device for introducing a gas into a molten metal and a method for making the device
DE3716388C1 (de) * 1987-05-15 1988-10-27 Radex Deutschland Ag Gasspuelstein
JPH03297537A (ja) * 1990-04-13 1991-12-27 Nkk Corp 取鍋底吹きポーラス煉瓦および取鍋底吹きポーラス煉瓦の地金除去方法
CZ102193A3 (en) * 1990-12-07 1994-01-19 Veitsch Radex Ag Formation of a bottom or a wall of a metallurgical vessel
DE4103837A1 (de) * 1991-02-08 1992-08-13 Plibrico Gmbh Einblasvorrichtung fuer ein metallurgisches gefaess
JPH0656690U (ja) * 1992-12-25 1994-08-05 愛知製鋼株式会社 製鋼用電気炉
US6199836B1 (en) * 1998-11-24 2001-03-13 Blasch Precision Ceramics, Inc. Monolithic ceramic gas diffuser for injecting gas into a molten metal bath
JP2002028772A (ja) * 2000-07-14 2002-01-29 Daido Steel Co Ltd ポーラスプラグ
KR100931159B1 (ko) * 2002-11-21 2009-12-10 주식회사 포스코 래들용 포러스 플러그장치
DE10305232B3 (de) * 2003-02-08 2004-08-05 Refractory Intellectual Property Gmbh & Co.Kg Feuerfester keramischer Gasspülstein
JP2006283052A (ja) * 2005-03-31 2006-10-19 Jfe Steel Kk ガス吹き込み羽口
DE102008029934B3 (de) * 2008-06-26 2009-06-10 Refractory Intellectual Property Gmbh & Co. Kg Feuerfester keramischer Gasspülstein

Also Published As

Publication number Publication date
DE102010007126B3 (de) 2011-07-07
CN102725427A (zh) 2012-10-10
EP2531623A1 (de) 2012-12-12
ZA201205605B (en) 2013-05-29
CN102725427B (zh) 2015-04-15
JP5711269B2 (ja) 2015-04-30
KR20120116456A (ko) 2012-10-22
ES2522532T3 (es) 2014-11-14
PL2531623T3 (pl) 2015-01-30
JP2013519061A (ja) 2013-05-23
WO2011095193A1 (de) 2011-08-11

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