WO2010108572A1 - Tampon de quenouille en céramique réfractaire - Google Patents

Tampon de quenouille en céramique réfractaire Download PDF

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Publication number
WO2010108572A1
WO2010108572A1 PCT/EP2010/000895 EP2010000895W WO2010108572A1 WO 2010108572 A1 WO2010108572 A1 WO 2010108572A1 EP 2010000895 W EP2010000895 W EP 2010000895W WO 2010108572 A1 WO2010108572 A1 WO 2010108572A1
Authority
WO
WIPO (PCT)
Prior art keywords
opening
gas
region
measuring
plug
Prior art date
Application number
PCT/EP2010/000895
Other languages
German (de)
English (en)
Inventor
Gerald Nitzl
Christoph Eglsäer
Original Assignee
Refractory Intellectual Property Gmbh & 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 & Co. Kg filed Critical Refractory Intellectual Property Gmbh & Co. Kg
Priority to MX2011009905A priority Critical patent/MX2011009905A/es
Priority to BRPI1010013A priority patent/BRPI1010013A2/pt
Priority to US13/257,253 priority patent/US20120001372A1/en
Priority to CN2010800177374A priority patent/CN102413962A/zh
Priority to RU2011138684/02A priority patent/RU2488461C2/ru
Publication of WO2010108572A1 publication Critical patent/WO2010108572A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures
    • B22D41/16—Closures stopper-rod type, i.e. a stopper-rod being positioned downwardly through the vessel and the metal therein, for selective registry with the pouring opening
    • B22D41/18—Stopper-rods therefor
    • B22D41/186—Stopper-rods therefor with means for injecting a fluid into the melt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass

Definitions

  • the invention relates to a refractory ceramic plug for controlling a flowing molten metal in the region of an outlet opening of a metallurgical melting vessel, for example a tundish.
  • Such a plug is usually constructed as follows: it has a rod-shaped body with a first end and a second end, wherein the body consists of at least one refractory ceramic material.
  • Rod-shaped is to be understood in the technical sense, that is, the length of the body is much larger than its diameter / its width.
  • a bag-like opening extends in the axial direction of the body toward the second end, this opening extending to a connection region with a bottom and the connection region ending in front of the second end of the body.
  • a so-called feed area is provided, because here a treatment gas, in particular an inert gas, such as argon, is introduced into the opening of the plug.
  • At least one gas channel extends from the connection region of the opening to a surface section of the body in the region of its second end.
  • This gas channel has a cross-sectional area which is smaller than the cross-sectional area of the opening.
  • the plug is placed immediately in the spout area of the metallurgical crucible, in vertical alignment with the first end at the top and the second end at the bottom, adjacent the spout.
  • an annular channel opposite the spout can be enlarged or reduced to control the amount of molten metal passing through it.
  • FIG. 1 shows such a known arrangement, wherein the plug bears the reference numeral 10 and an associated spout the reference numeral 50.
  • the illustrated lower (second) end 14 of the plug 10 is in a slightly raised position, so that between the plug 10 and spout 50 an annular channel is formed by the melt S from a tundish, not shown in the spout 50 and from there into downstream facilities can flow.
  • the treatment gas which is supplied via the opening 16 and passed from there in the direction of arrow G in the gas channel 18, which is coaxial with the central longitudinal axis M of the plug-shaped body 10, leaves the plug 10 in the region of a spout opening 20 at the lowermost part of the second end 14 and flows from there into the melt S.
  • a metal linkage which is fastened with its from the plug 16 upwardly projecting portion on a corresponding lifting device.
  • a control valve of the type shown has long been used. However, it has been found that irregularities in the flow behavior of the melt occur again and again during operation.
  • a closure plug in which a filling body over a portion of the opening - viewed in the axial direction of the body - extends, wherein at least one gas channel in the axial direction of the filling body extends through the filling body or between filling body and body, parallel to the central longitudinal axis of the closure plug, or spiral, helical or meandering or threading, which fluidly connects the opening to the gas channel which transports the gas to the surface of the second end of the plug.
  • the invention has for its object to optimize a generic plug so far that even with different positioning of the plug relative to the spout a controlled melt flow is achieved.
  • the invention is based on the following finding:
  • the dashed line schematically characterizes the dependence in an application in which no gas flows, while the closed line characterizes the dependence of the two parameters under gas supply.
  • a refractory ceramic plug according to the invention for controlling a passing molten metal has the following features:
  • a rod-shaped body having a first end and a second end
  • a bag-like opening extends from a feed area in the axial direction of the body to a connection area with a floor
  • At least one gas channel extends from the connection region of the opening up to a surface section of the body in the region of a second end
  • the gas channel has a cross-sectional area which is smaller than the cross-sectional area of the opening
  • At least one section is provided along the opening, through which a gas conveyed from the feed region to the connection region is forcibly passed, the section having an effective flow cross-section which is smaller than that of the opening,
  • a device for measuring the gas pressure in this region is arranged or connected.
  • Said section has a so-called Restrictor function, as known in principle from the already mentioned DE 10 2005 029 033 B4 is. While there is a relatively low gas pressure above this section, the reduced flow cross section for the gas in the region of the section leads to a significant increase in the gas pressure and the gas velocity, which subsequently decrease again with an increased flow cross section.
  • the gap width between plug and spout can be controlled so that the casting process outside the discontinuity range, as shown in Figure 2, takes place.
  • plug and spout are arranged in a corresponding manner to each other depending on the amount and the pressure of the supplied gas. If, for example, the casting performance has to be reduced due to operational reasons or if it is reduced by metallurgical influences such as buildup in a dip tube, which follows the spout fluidically, there is the risk that it will enter the discontinuity zone and increase the casting volume despite reducing the gap width between plug and spout , This case is indicated by pressure fluctuations in the connection area of the plug because too much gas enters the reduced melt flow. This phenomenon is now used for the early detection of the changed flow pattern. By reducing the gas pressure in the connection area, the plug lowers slightly in the direction of the Spout, the gap width decreases and the melt flow decreases as desired.
  • the device for measuring the gas pressure can be arranged directly in said region of the opening, for example in the form of a manometer, in particular an electronic pressure gauge, which withstands the temperatures prevailing there (about 1,500 to 1,600 ° C).
  • the transmission of the pressure measured values to an evaluation unit can take place via temperature-resistant cables or wirelessly, for example by radio.
  • connection area of the Opening connects with a pressure gauge.
  • the actual pressure gauge can also be arranged outside the plug, in particular in a region in which lower ambient temperatures prevail, that is, for example, in the region of said lifting device for raising and lowering the plug.
  • the same gas pressure prevails in the measuring channel as in the connection area of the opening so that it can be measured exactly.
  • the measuring channel from the connection region of the opening at least partially lead through the body in the direction of the first end.
  • the measuring channel is then led out of the body, for example, above the molten bath and guided via a connecting line to the pressure measuring device.
  • the mentioned Restrictor section can be formed in different ways.
  • One possibility is to arrange the section in the opening itself.
  • the section may be stationary by one in the opening arranged filling body are formed, wherein at least one gas passage between the filling body and a corresponding wall of the opening remains free.
  • the portion is formed by a packing arranged in a stationary manner in the opening, which extends over the entire cross section of the opening, wherein at least one gas passage extends through the packing, which directs a gas flowing therethrough in the direction of the connection area of the opening ,
  • Another way to form the section consists of a filling body which extends over the entire cross-section of the opening and divides the opening into two areas in the axial direction, and with a channel which connects one area of the opening with the other area of the opening and a cross section smaller than the cross section of each region of the opening.
  • the channel extends, for example, through the plug body with inlet and outlet openings in the wall of the opening.
  • These gas passages each have a cross section which is smaller than the cross section of the opening.
  • the ratio is at least 1: 5 or at least 1:10, but it may also be higher.
  • the opening diameter is for example 15 to 30 mm and that of the gas channels with reduced cross-section between 2 and 7 mm.
  • the at least one gas channel which leads to the surface portion in the region of the second end of the body
  • this may be a single discrete gas channel, for example coaxial with the central longitudinal axis of the plug. But it can also be arranged several juxtaposed gas channels with a correspondingly small flow cross-section.
  • Another possibility is to do so said nose portion (the second end) of the plug at least partially with an undirected porosity, that is, the gas does not flow linearly from the opening to the plug surface, as in a channel, but zigzagged according to the open porosity in this end portion of the plug.
  • the stopper according to FIG. 3 consists of a refractory ceramic body 10.
  • an opening 16 extends from a first end 12 to a second end 14 and thus from a supply region 22 for a treatment gas to a connection region 24 with a bottom 26 ,
  • a gas channel 18 extends to the surface portion 20 of the body 10 in the region of the second end 14.
  • the gas channel 18 has a cross-sectional area which is about 1/10 of the cross-sectional area of the opening 16.
  • a filler 30 is provided which forms a portion through which the opening 16 is divided into an upper portion 32 and a lower portion 34.
  • the filler body 30 extends over the entire cross-sectional area of the opening 16 and has a central passage opening 36 which connects the sections 32, 34 with each other.
  • the flow cross section of the passage opening 36 is clear smaller than the cross section of the opening 16.
  • the section 30 forms a kind Restrictor.
  • the plug is formed with a device 40 that includes a gas line 42 and a pressure gauge 44.
  • the gas conduit 42 extends from a wall 38 of the region 34, then extends toward the first end 12 through the body 10, and then exits the body 10 to the outside and continues in a gas conduit leading to the manometer 44.
  • the gas pressure in the region 34 of the plug can be measured continuously.
  • a signal can be generated via a corresponding computer program in order to raise or lower the plug relative to the spout and to regulate the flow rate of the melt.
  • the exemplary embodiment according to FIG. 4 differs from the exemplary embodiment according to FIG. 3 in that the section (filling body) 30 completely separates the section 32 from the section 34 in terms of flow technology.
  • the gas flows from the region 32 via a bypass 36 'within the body 10 into the region 34, wherein the flow cross section of the bypass 36' corresponds approximately to that of the gas passage 36 in the embodiment according to FIG.
  • a membrane manometer 44 ' is arranged, which is part of the device for measuring the gas pressure in the region 34.
  • the membrane manometer 44 ' comprises a high-temperature-resistant, gas-permeable metal membrane, which bulges differently depending on the gas pressure.
  • the thereby accomplished path change is via a measuring line 42 'in an evaluation 46 and converted into corresponding gas pressure values. As described, the respective value gives the steelmaker an indication to throttle or increase the flow rate of the molten steel in order not to come into the critical zone ( Figure 2).
  • FIG. 5 basically corresponds to that according to DE 10 2005 029 033 B4 with the proviso that in the, here very small region 34 between section (filling body) 30 and bottom 26 an electronic pressure measuring device 44 "is arranged, of which a measuring line 42 "leads to an evaluation unit 46, wherein the measuring line 42 extends partially through the body 10 of the plug.
  • the pressure gauge 44 or the evaluation units 46 are arranged in a region in which the temperatures are as low as possible, ie outside the molten bath.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Measuring Fluid Pressure (AREA)
  • Secondary Cells (AREA)
  • Spark Plugs (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Fireproofing Substances (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Ceramic Products (AREA)

Abstract

L'invention concerne un tampon de quenouille en céramique réfractaire destiné à réguler une masse de métal fondu qui s'écoule dans la région d'une ouverture de sortie d'un creuset métallurgique, par exemple d'un panier de coulée.
PCT/EP2010/000895 2009-03-23 2010-02-13 Tampon de quenouille en céramique réfractaire WO2010108572A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
MX2011009905A MX2011009905A (es) 2009-03-23 2010-02-13 Tapon ceramico refractario.
BRPI1010013A BRPI1010013A2 (pt) 2009-03-23 2010-02-13 plugue cerâmico refratário
US13/257,253 US20120001372A1 (en) 2009-03-23 2010-02-13 Refractory ceramic plug
CN2010800177374A CN102413962A (zh) 2009-03-23 2010-02-13 耐火陶瓷塞
RU2011138684/02A RU2488461C2 (ru) 2009-03-23 2010-02-13 Огнеупорная керамическая пробка

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09004143A EP2233227B1 (fr) 2009-03-23 2009-03-23 Bouchon en céramique ignifuge
EP09004143.5 2009-03-23

Publications (1)

Publication Number Publication Date
WO2010108572A1 true WO2010108572A1 (fr) 2010-09-30

Family

ID=40622516

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/000895 WO2010108572A1 (fr) 2009-03-23 2010-02-13 Tampon de quenouille en céramique réfractaire

Country Status (11)

Country Link
US (1) US20120001372A1 (fr)
EP (1) EP2233227B1 (fr)
CN (1) CN102413962A (fr)
AT (1) ATE495840T1 (fr)
BR (1) BRPI1010013A2 (fr)
DE (1) DE502009000331D1 (fr)
MX (1) MX2011009905A (fr)
PL (1) PL2233227T3 (fr)
RU (1) RU2488461C2 (fr)
TW (1) TW201034772A (fr)
WO (1) WO2010108572A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2464149T3 (es) * 2012-04-16 2014-05-30 Refractory Intellectual Property Gmbh & Co. Kg Tapón refractario cerámico
WO2018108789A1 (fr) * 2016-12-12 2018-06-21 Vesuvius Group, S.A. Bouchon équipé d'un dispositif de détection de scories intégré
BR112021009697A2 (pt) * 2018-12-25 2021-08-17 Krosakiharima Corporation tampão e método para lingotamento contínuo
EP3705204B1 (fr) 2019-03-08 2022-08-03 Refractory Intellectual Property GmbH & Co. KG Tige de butée et procédé de fourniture d'un rideau de gaz uniforme autour d'une tige de butée
WO2024017662A1 (fr) 2022-07-18 2024-01-25 Refractory Intellectual Property Gmbh & Co. Kg Tige d'arrêt et procédé d'induction d'un écoulement rotatif d'un métal fondu

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0396111A2 (fr) * 1989-05-03 1990-11-07 British Steel plc Réglage pour le courant de fonte
WO2005042183A1 (fr) * 2003-11-04 2005-05-12 Mefos-Metallurgical Research Institute Ab Procede et dispositif de detection de laitier
DE102005029033B4 (de) 2005-06-21 2007-10-11 Refractory Intellectual Property Gmbh & Co. Kg Verschlussstopfen für ein metallurgisches Schmelzgefäß

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8411596D0 (en) * 1984-05-05 1984-06-13 Thor Ceramics Ltd Stopper
DE4142773A1 (de) * 1991-12-23 1993-06-24 Thyssen Stahl Ag Stopfen fuer metallurgische gefaesse
BR0210148A (pt) * 2001-06-08 2004-06-08 Vesuvius Crucible Co Tampão refratário monobloco
CN1232372C (zh) * 2001-06-12 2005-12-21 维苏维尤斯·克鲁斯布公司 用于可靠进行气体注入的塞棒
CN1301167C (zh) * 2003-06-02 2007-02-21 北京科技大学 一种在中间包钢液中产生弥散微小气泡的方法
CN100467165C (zh) * 2006-04-14 2009-03-11 广东韶钢松山股份有限公司 连铸中间包浸入式水口的烘烤方法
EP2189231B1 (fr) * 2008-11-19 2010-10-27 Refractory Intellectual Property GmbH & Co. KG Quenouille

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0396111A2 (fr) * 1989-05-03 1990-11-07 British Steel plc Réglage pour le courant de fonte
WO2005042183A1 (fr) * 2003-11-04 2005-05-12 Mefos-Metallurgical Research Institute Ab Procede et dispositif de detection de laitier
DE102005029033B4 (de) 2005-06-21 2007-10-11 Refractory Intellectual Property Gmbh & Co. Kg Verschlussstopfen für ein metallurgisches Schmelzgefäß

Also Published As

Publication number Publication date
BRPI1010013A2 (pt) 2016-04-19
RU2488461C2 (ru) 2013-07-27
EP2233227A1 (fr) 2010-09-29
RU2011138684A (ru) 2013-03-27
TW201034772A (en) 2010-10-01
PL2233227T3 (pl) 2011-05-31
CN102413962A (zh) 2012-04-11
ATE495840T1 (de) 2011-02-15
EP2233227B1 (fr) 2011-01-19
MX2011009905A (es) 2012-01-20
US20120001372A1 (en) 2012-01-05
DE502009000331D1 (de) 2011-03-03

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