US20080136070A1 - Gas Bubbling Element and Corresponding Gas Bubbling System - Google Patents

Gas Bubbling Element and Corresponding Gas Bubbling System Download PDF

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Publication number
US20080136070A1
US20080136070A1 US10/547,861 US54786104A US2008136070A1 US 20080136070 A1 US20080136070 A1 US 20080136070A1 US 54786104 A US54786104 A US 54786104A US 2008136070 A1 US2008136070 A1 US 2008136070A1
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United States
Prior art keywords
gas
purging element
element according
section
gas purging
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Abandoned
Application number
US10/547,861
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English (en)
Inventor
Ewald Schumacher
Viktor Kchloponin
Edgar Schumacher
Hubert Brenner
Othmar Mitlohner
Vladimir Turovskij
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Techcom Import Export GmbH
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Techcom Import Export GmbH
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Publication date
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Assigned to TECHCOM IMPORT EXPORT GMBH reassignment TECHCOM IMPORT EXPORT GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRENNER, HUBERT, KCHLOPONIN, VIKTOR, MITLOHNER, OTHMAR, SCHUMACHER, EDGAR, SCHUMACHER, EWALD, TUROVSKIJ, VLADIMIR
Publication of US20080136070A1 publication Critical patent/US20080136070A1/en
Abandoned legal-status Critical Current

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    • 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
    • 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

Definitions

  • the present invention relates to a refractory ceramic gas purging element for a metallurgical melting vessel and an associated gas purging device having such a gas purging element.
  • Gas purging elements of the type cited have been known for many years. They are used for blowing gas, such as argon or nitrogen, into a metallurgical melt.
  • the gas has different purposes: the metal melts may be homogenized using the gas. In addition, oxidation processes may be accelerated.
  • One goal of the gas treatment may also be the removal of non-metallic inclusions in the melts or desulfurization and/or dephosphorization of a steel melt, for example.
  • Metallurgical melting vessels in which gas purging elements of this type are used, are ladles or ladle furnaces, for example. Gas purging elements of the type cited are also used for vacuum treatment of a steel.
  • the gas is guided along the gas purging element between a first end, to which the gas is supplied, and a second end, at which the gas is released into the melt.
  • the gas is conducted along via appropriate channels.
  • channels may be implemented directly in the ceramic material through materials which may be burned out, for example.
  • the channels may also be formed by pipes (tubes) which run in the ceramic material.
  • These channels have different cross-sectional shapes.
  • the flow cross-section is circular or slot-shaped, for example.
  • the channels may run directly, i.e. axially, or even in a labyrinth from one end to the other end.
  • a breakthrough guard at the first end of the gas purging element or in the gas purging element itself is known.
  • Such a breakthrough guard is used for the purpose of stopping infiltration of metal melt into the gas purging element.
  • gas purging elements have a continuous circular cross-section, for example.
  • gas purging elements shaped like truncated cones are also known, which are used as changeable purging elements.
  • the gas purging elements may be inserted into a refractory framing block.
  • This framing block is a component of the melting vessel, for example an electric arc furnace or a Siemens-Martin furnace.
  • These purging elements are particularly installed into the bottom or the wall of the metallurgical melting vessel. Purging elements in the bottom may be positioned in such way that the gas is guided into the melt more or less perpendicularly to the surface of the bottom.
  • positioning the purging elements diagonally in order to guide the gas to a specific point within the melt is also known. This is also true for the wall installation of the purging elements. The installation may be performed more or less horizontally, i.e., perpendicularly to the inner wall of the metallurgical vessel or inclined to the horizontal (to the melt bath surface).
  • the purging gas supply may be continuous or discontinuous. In any case, it is to be ensured that the gas purging device is always operational when it is required. This requires corresponding safety measures in order to prevent obstructions of the gas-conducting channels by metal melts or slag, for example.
  • the present invention is based on the object of providing a gas purging element and an associated gas purging device which have a high safety standard, allow secure and regular gas supply into the metal melt, and may fulfill the desired metallurgical functions unrestrictedly.
  • the present invention suggests a refractory ceramic gas purging element for a metallurgical melting vessel, which has the following sections, located between a first end, to which a gas is supplied, and a second end, at which the gas is released:
  • the gas purging element is divided into different, axially adjoining sections, continuous gas conveyance from the first (cold) end to the second (hot) end is ensured.
  • the gas may be conducted via the gas supply pipe into the purging element. From there it reaches the first gas distributor chamber, from which the gas subsequently flows through multiple capillary-type channels in the direction toward the second end before it reaches a second gas distributor chamber. From there, the gas is guided via the cited larger channels up to the second end of the gas purging element and out of this end.
  • Such a gas purging element has multiple safety features:
  • the second gas distributor chamber is used as a “barrier” in order to prevent the further penetration of metal melt. Because the gas distributor chamber has a larger cross-section than the sum of the gas channels, the infiltrating metal melt may spread out, cool, and solidify. Further penetration in the direction toward the cold (first) end of the gas purging device is also prevented because capillary channels adjoin the other end of the second gas distributor chamber. These capillary channels are implemented having a significantly smaller flow cross-section than the gas channels in the region of the second end, so that the penetration of metal melt into the capillary channels is thus made more difficult.
  • the gas channels in the region of the second end have an internal diameter>2 mm or >3 mm, while the internal-diameter of the capillary channels is selected as ⁇ 1.0 mm.
  • the gas purging element according to the present invention offers a further safety device by the first gas distributor chamber, in which a similar effect is achieved as already described on the basis of the second gas distributor chamber.
  • the present invention provides a fourth safety measure.
  • This safety measure is that the gas supply pipe discharging into the first gas distributor chamber is implemented having a length which is greater than the axial distance between the first end of the gas purging element and the first gas distributor chamber.
  • the gas supply pipe is not to run linearly, but rather is to have at least one, preferably multiple curved (angled) sections in order to lengthen the flow path.
  • the gas supply pipe may be curved like a helix or spiral and/or meander.
  • the flow path of the gas is lengthened by multiple “branches”, which do not interfere in principle, but also lengthen the path for any penetrating metal melt, which is thus forced to cool and solidify.
  • the gas supply pipe may be made of a material which melts at a temperature below the temperature of a metallurgical melt to be treated. Therefore, if metal melt penetrates into this region, the gas supply pipe will melt. If the gas supply pipe is placed within a bulk material, as provided according to a further embodiment, the metal melt may diffuse into this section of the gas purging element, i.e., branch out, through which the solidification behavior is accelerated once again. It is obvious that the bulk material must be arranged in a corresponding external receiver (made of metal or dense ceramic, for example), so that the melt does not diffuse radially in an uncontrolled way. The receiver is in turn enclosed by refractory material.
  • the individual sections may have an identical cross-sectional shape, may be implemented having a circular cross-section, for example, so that an external cylindrical shape results overall for the gas purging element.
  • the individual sections may be attached to one another.
  • the gas purging element may have a constant cross-section over its entire length, such as a circular cross-section. It is also possible to vary the cross-section from the first end to the second end, to reduce it, for example, so that a type of truncated cone shape arises. In this way, the gas purging element may particularly be used as an exchangeable element.
  • the gas purging device is implemented having a corresponding drive.
  • This drive may be implemented for alternating axial and/or rotational movement of the gas purging element.
  • the purging element may alternately be moved axially back and forth by a few millimeters (for example, +/ ⁇ 3 mm) or may be rotated by a few degrees in one and/or the other direction.
  • the drive may also be used for the purpose of pushing the purging element in the axial direction, i.e., advancing it in the direction toward the melt when the purging element is partially worn in the region of the second end, for example.
  • the cross-section of the first and second gas distributor chambers is to be larger than the sum of the cross-sectional areas of the adjoining capillary channels in order to produce a diffusion chamber for any penetrating melt and ensure gas supply into the capillaries and/or out of the capillaries.
  • the flow cross-section (i.e., the fluidically active cross-section) of a capillary channel is at least 50% smaller than the flow cross-section of a gas supply pipe at the first end and/or the flow cross-section of a gas channel at the second end.
  • the flow cross-section of each capillary channel may also be significantly smaller than the 50% cited in relation to the gas supply pipe and/or the gas channels, for example, 70, 80, or 90% smaller.
  • the gas channels are designed slot like at the second end, i.e., they have a rectangular cross-section, for example.
  • the gas channels may also be implemented having a triangular or drop-shaped flow cross-section. It has been shown to be favorable in this case if, with a drop-shaped cross-sectional geometry, the channels (tubes) are positioned in such a way that the narrower end faces toward the central longitudinal axis of the gas purging element, as also represented in the following description of the figures.
  • the gas distributor chambers may be implemented in situ in the ceramic matrix material of the gas purging element. However, the gas distributor chambers may also be formed by metallic cavities which the associated gas channels and/or capillary channels discharge into.
  • the capillary channels may be positioned essentially axially, i.e., parallel and at a distance to one another, the gas channels in the region of the second end of the purging element may be positioned in different ways:
  • one embodiment provides that the channels are positioned distributed “symmetrically” over the cross-section.
  • the individual channels may—in comparison to a clock—be positioned at the 6 o'clock, 10 o'clock, and 2 o'clock positions.
  • these channels may run along an imaginary line and at a distance to one another, this line running horizontally in a purger which is installed into a wall of the vessel, for example.
  • the channels and chambers are always enclosed by refractory ceramic material (matrix material). This material may be cast or pressed. An external envelope is not necessary.
  • the ceramic purging element may be installed in this way.
  • FIG. 1 shows a side view of a gas purging element according to the present invention
  • FIG. 2 shows a section along line A-A shown in FIG. 1 ,
  • FIG. 3 shows an alternative embodiment to the exemplary embodiment shown in FIG. 2 ,
  • FIG. 4 shows a section along line B-B in FIG. 1 ,
  • FIG. 5 shows a section C-C in the longitudinal direction in the region of the first end of the purging element having attached first gas distributor chamber
  • FIG. 6 shows a section D-D in the longitudinal direction through the second gas distributor chamber
  • FIG. 7 shows a side view of a gas purging device having a purging element which is guided on bearings
  • FIG. 8 shows a view of a gas purging device having a gas purging element which is axially movable via a drive.
  • FIG. 1 A gas purging element according to the present invention is illustrated in FIG. 1 .
  • the construction of the gas purging element (from right to left) is as follows:
  • a gas supply pipe 5 discharges at E 1 into a first section 3 , which is delimited at its front face by a steel plate 30 and around its circumference by a steel pipe 14 .
  • the gas supply pipe 5 continues in a helix behind the steel plate 30 , the helix being shown by the reference number 13 .
  • the helix 13 runs in a space which is filled with a bulk material 15 , based on expanded perlite, for example, and is delimited at a distance to the steel plate 30 by a further steel plate 31 , through which the helix 13 is guided.
  • a first gas distributor (distribution) chamber 32 which is delimited around the circumference by the extended steel pipe 14 , adjoins the steel plate 31 .
  • a section 2 whose cross-section is shown in FIG. 4 , follows in the flow direction of the gas.
  • a refractory ceramic material in which multiple capillary channels 10 run in the axial direction of the purging element, is located within a cylindrical frame 12 made of steel (in the extension of the pipe 14 ).
  • the capillary channels (formed by steel tubes) have a circular cross-section having an internal diameter of 0.5 mm.
  • Tubular body 13 and envelope 17 may be made of metal or refractory ceramic.
  • the gas which was guided through the second gas distributor chamber 16 subsequently reaches gas channels 6 , which run axially and at a distance to one another in a ceramic matrix material 8 ( FIGS. 2 , 3 ) up to the front face of the second end E 2 of the gas purging element.
  • FIG. 2 shows three gas channels 6 having a circular cross-section.
  • Each of the gas channels 6 has an internal cross-section of 2 mm.
  • FIG. 3 shows an alternative embodiment, in which the three gas channels 6 each have a drop shape, the gas channels 6 —in comparison with a clock—being positioned at 6 o'clock, 10 o'clock, and 2 o'clock.
  • the alignment of the gas channels 6 is such that the narrower, approximately triangular end always lies on the inside.
  • This section 1 of the purging element is in turn delimited around its circumference by a metal pipe 9 .
  • the external frames (pipe segments) of the individual sections which are each made of ceramic or metal parts, are mechanically connected to one another, the end sections being designed as stepped and having corresponding threads.
  • the purging element illustrated in FIG. 1 is completely mantled by refractory material. It is also possible to assemble the entire gas purging element within a continuous tubular envelope or to avoid the envelope completely. In this case, the gas distributor chambers 16 , 32 and the different channels are implemented within a ceramic matrix material.
  • the gas supply pipe 5 , the capillary channels 10 , and also the gas channels 6 are formed by metal tubes, but may also be implemented in situ, during manufacturing, for example, by arranging materials with corresponding cross-sections at the respective places, which materials are later burned out. This applies analogously for implementing cavities (gas distributor chambers) in the ceramic basic body.
  • the gas flows from the first end E 1 through the adjoining sections up to the gas outlet end, which is identified in FIG. 1 by E 2 .
  • the helix 13 is made of copper here, i.e., a metal having a relatively low melting point.
  • the purging element is guided in the axial direction by multiple bearings 18 , 19 . These are roller bearings.
  • the tubular purging element may be rotated alternately left and right via a motor M and a gear 20 .
  • the drive is placed externally on the melting vessel.
  • a gear 22 is illustrated, by which continuous oscillating movements (e.g., sinusoidal movements) may be transmitted to the purging element in order to move it back and forth a few millimeters at a time in the axial direction, for example.
  • continuous oscillating movements e.g., sinusoidal movements
  • the gas purging element must be positioned in a corresponding refractory frame in the bottom or the wall of an associated metallurgical vessel, and, in the exemplary embodiments shown in FIGS. 7 and 8 , in such a way that the rotational movement and/or axial movement of the purging element may be ensured.
  • the refractory material of the wall and/or the bottom of the metallurgical vessel is symbolized in FIGS. 7 and 8 by the reference number 35 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Treating Waste Gases (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Gas Separation By Absorption (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
US10/547,861 2003-03-06 2004-03-04 Gas Bubbling Element and Corresponding Gas Bubbling System Abandoned US20080136070A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
RU2003106304/02 2003-03-06
RU2003106304/02A RU2230796C1 (ru) 2003-03-06 2003-03-06 Продувочный элемент агрегата для получения или доводки стали
PCT/EP2004/002153 WO2004079019A2 (de) 2003-03-06 2004-03-04 Gasspülelement und zugehörige gasspüleinrichtung

Publications (1)

Publication Number Publication Date
US20080136070A1 true US20080136070A1 (en) 2008-06-12

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US10/547,861 Abandoned US20080136070A1 (en) 2003-03-06 2004-03-04 Gas Bubbling Element and Corresponding Gas Bubbling System

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US (1) US20080136070A1 (de)
EP (1) EP1599610B1 (de)
JP (1) JP2006519930A (de)
CN (1) CN1784500B (de)
AT (1) ATE362551T1 (de)
BR (1) BRPI0408138A (de)
DE (1) DE502004003839D1 (de)
EA (1) EA007214B1 (de)
ES (1) ES2286614T3 (de)
LV (1) LV13402B (de)
MX (1) MXPA05009482A (de)
NO (1) NO20054181D0 (de)
PL (1) PL1599610T3 (de)
PT (1) PT1599610E (de)
RU (1) RU2230796C1 (de)
UA (1) UA83213C2 (de)
WO (1) WO2004079019A2 (de)
ZA (1) ZA200507094B (de)

Families Citing this family (8)

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Publication number Priority date Publication date Assignee Title
CN100371463C (zh) * 2005-07-22 2008-02-27 钢铁研究总院 复吹转炉底吹供气元件吹堵复通装置及方法
RU2324485C2 (ru) * 2005-12-27 2008-05-20 Государственное образовательное учреждение высшего профессионального образования "Дагестанская государственная медицинская академия федерального агентства по здравоохранению и социальному развитию" Способ лечения рефракторной железодефицитной анемии у женщин
CN102041346B (zh) * 2010-12-28 2012-06-06 北京建龙重工集团有限公司 一种转炉自动底吹控制的方法
CN102274958B (zh) * 2011-08-16 2013-08-21 东北大学 棱台缝隙式防堵钢包底吹喷粉装置
CN105087870B (zh) * 2015-08-31 2017-03-08 濮阳濮耐高温材料（集团）股份有限公司 吹气元件、复合吹气砖及复合吹气砖的制备方法
CN109182655A (zh) * 2018-10-23 2019-01-11 王子晨 一种用于液低偏吹的吹气棒
RU2720413C1 (ru) * 2019-08-05 2020-04-29 Закрытое акционерное общество "Ферро Балт Плюс" Способ донной продувки жидкого металла газом в ковше
RU2766401C1 (ru) * 2021-07-09 2022-03-15 Акционерное общество "Ферро Балт Плюс" Устройство для донной продувки жидкого металла газом в ковше

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4539043A (en) * 1982-03-29 1985-09-03 Nippon Kokan Kabushiki Kaisha Bottom-blown gas blowing nozzle
US4899992A (en) * 1987-02-18 1990-02-13 Injectall Limited Devices and apparatus for injecting gas into high temperature liquids, e.g. molten metals
US4944496A (en) * 1987-04-10 1990-07-31 Injectall Limited Apparatus for injecting gas into high temperature liquids, e.g. molten metals

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JPS4960004U (de) * 1973-08-29 1974-05-27
JPS58167716A (ja) * 1982-03-29 1983-10-04 Nippon Kokan Kk <Nkk> ガス吹込用ノズル及びその製造法
DE3441223A1 (de) * 1984-11-10 1986-05-15 Lichtenberg Feuerfest GmbH, 5200 Siegburg Spueleinsatz
DE3527793A1 (de) * 1985-08-02 1987-02-12 Esb Schweissbetrieb Burbach & Verfahren zur montage eines fuer metallurgische gefaesse vorgesehenen gasspuelsteins
JPS62250112A (ja) * 1986-04-23 1987-10-31 Nippon Kokan Kk <Nkk> ガス吹込みプラグ
JPS6393814A (ja) * 1986-10-06 1988-04-25 Nkk Corp 底吹ノズル
DE3833504A1 (de) * 1988-10-01 1990-04-05 Didier Werke Ag Gasspueleinrichtung
CA2014999C (en) * 1989-04-24 1999-09-07 Kenneth William Bates Gas injector
DE4012952C2 (de) * 1990-04-24 1995-03-23 Didier Werke Ag Gasspüleinrichtung an einem metallurgischen Gefäß
RU2066690C1 (ru) * 1993-04-23 1996-09-20 Акционерное общество по производству огнеупоров "Магнезит" Устройство для донной продувки металла
JP3645588B2 (ja) * 1994-06-30 2005-05-11 黒崎播磨株式会社 貫通孔を有するガス吹込み用耐火物

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4539043A (en) * 1982-03-29 1985-09-03 Nippon Kokan Kabushiki Kaisha Bottom-blown gas blowing nozzle
US4899992A (en) * 1987-02-18 1990-02-13 Injectall Limited Devices and apparatus for injecting gas into high temperature liquids, e.g. molten metals
US4944496A (en) * 1987-04-10 1990-07-31 Injectall Limited Apparatus for injecting gas into high temperature liquids, e.g. molten metals

Also Published As

Publication number Publication date
JP2006519930A (ja) 2006-08-31
EA200501351A1 (ru) 2006-02-24
PL1599610T3 (pl) 2007-08-31
RU2230796C1 (ru) 2004-06-20
WO2004079019A2 (de) 2004-09-16
ZA200507094B (en) 2006-06-28
EP1599610A2 (de) 2005-11-30
EA007214B1 (ru) 2006-08-25
EP1599610B1 (de) 2007-05-16
MXPA05009482A (es) 2006-03-10
NO20054181L (no) 2005-09-08
UA83213C2 (ru) 2008-06-25
NO20054181D0 (no) 2005-09-08
BRPI0408138A (pt) 2006-03-01
PT1599610E (pt) 2007-06-21
LV13402B (en) 2006-04-20
ATE362551T1 (de) 2007-06-15
CN1784500B (zh) 2010-07-21
CN1784500A (zh) 2006-06-07
DE502004003839D1 (de) 2007-06-28
WO2004079019A3 (de) 2004-11-11
ES2286614T3 (es) 2007-12-01

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Owner name: TECHCOM IMPORT EXPORT GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHUMACHER, EWALD;KCHLOPONIN, VIKTOR;SCHUMACHER, EDGAR;AND OTHERS;REEL/FRAME:020306/0876

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