EP1678333B1 - Tube de coulee - Google Patents

Tube de coulee Download PDF

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Publication number
EP1678333B1
EP1678333B1 EP05730742A EP05730742A EP1678333B1 EP 1678333 B1 EP1678333 B1 EP 1678333B1 EP 05730742 A EP05730742 A EP 05730742A EP 05730742 A EP05730742 A EP 05730742A EP 1678333 B1 EP1678333 B1 EP 1678333B1
Authority
EP
European Patent Office
Prior art keywords
tapping
tapping pipe
outlet end
max
inlet
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
EP05730742A
Other languages
German (de)
English (en)
Other versions
EP1678333A2 (fr
Inventor
Oliver Zach
Michael Klikovich
Michael Berger
Christian Rahm
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 PL05730742T priority Critical patent/PL1678333T3/pl
Publication of EP1678333A2 publication Critical patent/EP1678333A2/fr
Application granted granted Critical
Publication of EP1678333B1 publication Critical patent/EP1678333B1/fr
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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
    • 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
    • B22D41/50—Pouring-nozzles
    • 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
    • C21C5/4653—Tapholes; Opening or plugging thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/21—Arrangements of devices for discharging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
    • F27B3/18—Arrangements of devices for charging
    • 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
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • F27D3/1518—Tapholes

Definitions

  • the invention relates to a tapping tube for a metallurgical melting vessel.
  • a metallurgical melting vessel is understood to mean an aggregate in which a metallurgical melt is produced, treated and / or transported, for example a converter or an electric arc furnace.
  • a molten metal in the melting vessel is passed along the tapping tube in a downstream unit.
  • the steel is fed from the converter via a ladle to a downstream continuous casting plant.
  • the molten metal should be transported as possible without contamination. For example, contact with the ambient atmosphere (oxygen, nitrogen) should be avoided, as should slagging.
  • a converter tap which - composed of several refractory blocks or slices - in the axial direction.
  • the inlet-side block should have a funnel-shaped passage and at the outlet end, the passage of the tapping pipe should have the smallest diameter.
  • Tapping tubes of this type have been on the market for 20 years and have proven themselves.
  • tapping pipes whose geometry at the outlet end of the specifications of DE 42 08 520 C2 equivalent.
  • the calculation of the outlet cross-section is based on a flow profile of the corresponding melt, namely assuming an average value for the height of the melt above the tapping tube.
  • the height of the molten metal (bath height) during tapping is often almost constant, because the converter is tilted (fed) with increasing tapping time.
  • the bath height inevitably decreases.
  • this increases the danger that slag will be conducted with the molten metal into the tapping pipe and through it. It can also lead to the formation of turbulence and the formation of a negative pressure in the tapping pipe. At the same time, this increases the risk of reoxidation and nitridation.
  • the invention has for its object to optimize a tap tube of the type mentioned in that it ensures the desired ("steady") mass flow during the entire tapping time and slag is prevented from being carried.
  • “Steady” means that the mass flow in the tapping pipe of the tapping pipe does not tear off until the end of the tapping time. Likewise, the intake of oxygen or nitrogen should be avoided as far as possible.
  • the design of the tapping pipe should be such that, regardless of its wear (within technically acceptable limits), a largely uniform mass flow can be transported along the tapping pipe.
  • a decisive aspect for the flow rate and the resulting flow profile is the respective bath height (height of the melt above the outlet end of the tapping tube).
  • the required radius of a circular cross-section of the tapping pipe passage is plotted against distance from the outlet end, where "0" defines the outlet end of the tapping pipe, 1.35 meters is the total length of the (new) tapping pipe and maximum bath height of 2.70 meters is assumed (calculated from the end of the expiry).
  • the effective maximum height of the molten bath above the tapping inlet is therefore: 1.35 meters.
  • the remaining curves show the theoretically minimum radius of the tapping channel at different distances from the outlet end for different bath heights, assuming the same cross section (radius 65 mm) at the outlet end.
  • a radius of 80 millimeters is sufficient for the cross section of the passage channel to completely fill a circular cross section of the tapping pipe at the outlet end with a radius of 65 mm with the melt jet.
  • the same cross section of the tap tube results at the outlet end for the necessary radius of the cross section of the passage channel in the inlet region of the tapping pipe a value of about 110mm.
  • the invention leads to completely different geometries of the passage channel of a tapping tube.
  • Fig. 2 shows as a curve (1) again at a bath height of 1600 mm and a radius of the outlet cross section of 65 mm required profile of the outlet channel in longitudinal section (theoretically at least necessary radius).
  • Curve (2) shows the flow conditions in a tapping tube according to the prior art (radius of the inlet cross section: 80 mm).
  • the avoidance of turbulence and maintenance of a compact jet in the tapping channel solves the invention by such a design of the tapping channel that during the tapping time, so even at low bath heights (effective height of the bath level above the inlet end of the tapping tube: ⁇ 20% of the maximum height) , the entire tapping channel is completely filled with melt.
  • the invention in its most general embodiment comprises the use of a tapping tube for a metallurgical melting vessel according to claim 1.
  • h 1 should be less than or equal to 0.2 times the maximum height (h max ) of a melt in the melting vessel in the axial extension of the tapping pipe.
  • the variable factor (h 1 / h max ) takes into account the different flow behavior, especially at low bath height.
  • the factor " ⁇ 0.2" indicates that a condition is detected in which the effective height of the melt level above the inlet end of the tapping tube is at least 80% less than the effective height of the melt level at the maximum bath height.
  • h k represents the existing length of the tapping pipe between the inlet end and the outlet end. While the outlet end of the tapping pipe is necessarily its lower free end and remains unchanged over time, the position of the inlet end changes with the duration of use of the tapping pipe. This is due to wear of the refractory material at the inlet end. By definition, the inlet end corresponds to the level of the adjacent refractory material of a refractory lining of the metallurgical melting vessel. As the erosion increases, the length of the tapping tube shortens accordingly.
  • the diameter "d" at the outlet end was set at 0.13 meters to ensure a desired flow rate "X".
  • the factor (h 1 / h max ) is assumed to be> 0.05 (h max is the maximum height of the melt in the melting vessel above the inlet region of the tapping tube in the axial extension of the tapping tube). According to another embodiment, the value is between> 0.1 and / or ⁇ 0.2.
  • the dimensioning of the tapping pipe in the inlet part is particularly important.
  • the conditions at low effective heights of the bath level are decisive.
  • the cross-sectional geometry at the outlet end is mainly determined by the setpoint of the flow rate (mass flow at maximum bath height).
  • the cross-sectional calculation for the passageway refers to values "y"> 50% of the total length of the tapping tube. According to another embodiment, these values are increased to ranges> 70%. This means that substantially the inlet-side half or the inlet-side third of the total length of the tube should be designed specifically for the specific invention.
  • this section can be formed continuously conically tapered; but the necessary taper in the direction of the outlet end can also be done stepwise if necessary.
  • FIGS. 3-5 also show technically adapted step-shaped wall profiles with which the desired effects can likewise be realized and which are technically easier to produce.
  • the lower outlet side half of the tapping tube, the taper of the follow (upper) inlet-side part but it is also possible to form this part with less conicity (slope), up to a cylindrical shape of the passage channel. This is especially true for the last 10 to 20% of the length of the tapping tube on the outlet side.
  • the slope S in this case describes the change of the radius r (y) of a circular cross-section of the tapping channel as a function of the distance y from the outlet end of the tapping.
  • the value may be >> 0.25, for example 1, 5, 10, 30, 50, 70 or 100. If the course of the wall of the tapping channel is completely or partially step-shaped or existing accordingly Production plants approximated so "slope" means the slope of the straight in the longitudinal section between the edges successive stages connectable straight line.
  • the dimensioning according to the invention of a tapping pipe also takes into account the change in length of the tapping pipe depending on the state of wear of the adjacent lining in that the respective values for the, A, bstichlength and height of the overlying melt are included in the calculation.
  • the inventive design of the tapping tube makes it possible to operate the tapping even at low bath heights with reduced turbulence and continuous melt flow and thus significantly reduce the entrainment of slag.
  • by reducing the temperature losses and the reduced wear further economic benefits such as energy savings and extended life of tapping.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Nozzles (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Food-Manufacturing Devices (AREA)

Claims (6)

  1. Utilisation d'un tuyau de coulée
    pour un récipient de fusion métallurgique avec une hauteur maximale hmax [m] d'une masse fondue dans le récipient de fusion au-dessus de l'extrémité d'entrée du tuyau de coulée dans le prolongement axial du tuyau de coulée,
    dont le canal de passage agencé axialement présente entre une extrémité d'entrée et une extrémité de sortie une section qui suit la relation suivante : A y = A ⋅ ( h l + h k ) [ ( h l + h k ) - y ]
    Figure imgb0013
     avec
    A = surface de section du canal de passage sur l'extrémité de sortie en m2 (avec spécification d'un débit souhaité),
    h1 = hauteur effective de la masse fondue dans le récipient de fusion au-dessus de l'extrémité d'entrée du tuyau de coulée dans le prolongement axial du tuyau de coulée [m] et h1 ≤ 0,2 hmax
    hk = longueur du tuyau de coulée entre l'extrémité d'entrée et l'extrémité de sortie [m]
    y = distance axiale [m] entre l'extrémité de sortie et un emplacement le long du tuyau de coulée (avec 0 ≤ y ≤ (h1 + hk)).
  2. Utilisation d'un tuyau de coulée selon la revendication 1 avec h1 > 0,05 hmax.
  3. Utilisation d'un tuyau de coulée selon la revendication 1 avec y > 0,5 hk.
  4. Utilisation d'un tuyau de coulée selon la revendication 1 avec y > 0,7 hk.
  5. Utilisation d'un tuyau de coulée selon la revendication 1 avec section circulaire du canal de passage.
  6. Utilisation d'un tuyau de coulée selon la revendication 1, dans lequel une partie, voisine de l'extrémité de sortie, du canal de passage est conçue de façon cylindrique.
EP05730742A 2004-06-04 2005-04-16 Tube de coulee Active EP1678333B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05730742T PL1678333T3 (pl) 2004-06-04 2005-04-16 Rura spustowa

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004027440A DE102004027440B3 (de) 2004-06-04 2004-06-04 Abstichrohr
PCT/EP2005/004051 WO2005118889A2 (fr) 2004-06-04 2005-04-16 Tube de coulee

Publications (2)

Publication Number Publication Date
EP1678333A2 EP1678333A2 (fr) 2006-07-12
EP1678333B1 true EP1678333B1 (fr) 2007-06-20

Family

ID=34585434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05730742A Active EP1678333B1 (fr) 2004-06-04 2005-04-16 Tube de coulee

Country Status (24)

Country Link
US (1) US7556765B2 (fr)
EP (1) EP1678333B1 (fr)
JP (1) JP4787244B2 (fr)
KR (1) KR100861849B1 (fr)
CN (1) CN100429323C (fr)
AR (1) AR049903A1 (fr)
AT (1) ATE365231T1 (fr)
AU (1) AU2005250081B2 (fr)
BR (1) BRPI0511738B1 (fr)
CA (1) CA2562334C (fr)
DE (2) DE102004027440B3 (fr)
DK (1) DK1678333T3 (fr)
EA (1) EA008914B1 (fr)
EG (1) EG24432A (fr)
ES (1) ES2287912T3 (fr)
MX (1) MXPA06013067A (fr)
NO (1) NO20064992L (fr)
PE (1) PE20060119A1 (fr)
PL (1) PL1678333T3 (fr)
PT (1) PT1678333E (fr)
SI (1) SI1678333T1 (fr)
TW (1) TWI294464B (fr)
WO (1) WO2005118889A2 (fr)
ZA (1) ZA200609209B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8240524B2 (en) * 2008-03-14 2012-08-14 Krosakiharima Corporation Upper nozzle
JP4695701B2 (ja) * 2009-07-24 2011-06-08 黒崎播磨株式会社 溶融金属排出用ノズル
JP2011062722A (ja) * 2009-09-16 2011-03-31 Kurosaki Harima Corp 溶融金属排出用ノズル

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1984685U (de) * 1967-11-30 1968-05-02 Hagenburger Chamotte Ton Feuerfester ausguss fuer giesspfannen od. dgl.
SU901285A1 (ru) * 1979-12-25 1982-01-30 Научно-производственное объединение "Тулачермет" Сталеплавильный агрегат
JPS5739064A (en) * 1980-08-19 1982-03-04 Toshiba Ceramics Co Ltd Tundish nozzle for continuous casting
AT387039B (de) * 1981-02-05 1988-11-25 Veitscher Magnesitwerke Ag Abstichvorrichtung fuer konverter
JPH02106592U (fr) * 1989-02-13 1990-08-24
JPH0518669A (ja) * 1991-04-25 1993-01-26 Tokyo Yogyo Co Ltd 電気炉炉底出鋼口用ターミナルブリツク
JPH0539519A (ja) * 1991-08-05 1993-02-19 Nkk Corp スラグ検知器を備えた転炉出鋼口
DE4208520C2 (de) * 1992-03-17 1994-10-27 Didier Werke Ag Abstichrohr an einem Konverter oder Lichtbogenofen
DE19821981B4 (de) * 1998-02-12 2008-08-14 Stilkerieg, Berthold, Dipl.-Ing. Schlackerückhalter für den Abstichkanal eines Konverters mit Schwimmerverschluß und Lochsteinkanal einer Gießpfanne
JPH11293323A (ja) * 1998-04-13 1999-10-26 Shinagawa Refract Co Ltd 転炉用出鋼口スリーブ構造
DE19925598A1 (de) * 1999-06-04 2000-12-07 Sms Demag Ag Abstichkanal für Schmelzöfen und Gießpfannen
US6346212B1 (en) * 2000-04-25 2002-02-12 Pohang Iron & Steel Co., Ltd. Converter
RU2186120C2 (ru) * 2000-09-11 2002-07-27 Открытое акционерное общество "Нижнетагильский металлургический комбинат" Чугунная летка доменной печи и бур для ее вскрытия
DE10117181C1 (de) * 2001-04-05 2002-10-31 Georgsmarienhuette Gmbh Verfahren und Vorrichtung zur Verhinderung des Mitfließens von Schlacke beim Abstich einer Stahlschmelze
RU24466U1 (ru) * 2002-01-23 2002-08-10 Открытое акционерное общество "Магнитогорский металлургический комбинат" Конвертер для выплавки стали
DE102004050701B3 (de) * 2004-10-18 2006-04-06 Refractory Intellectual Property Gmbh & Co. Kg Abstichrohr für ein metallurgisches Schmelzgefäß

Also Published As

Publication number Publication date
TWI294464B (en) 2008-03-11
WO2005118889A2 (fr) 2005-12-15
WO2005118889A3 (fr) 2006-04-06
BRPI0511738A (pt) 2008-01-08
EA200602009A1 (ru) 2007-06-29
SI1678333T1 (sl) 2007-12-31
CA2562334A1 (fr) 2005-12-15
CN100429323C (zh) 2008-10-29
DK1678333T3 (da) 2007-09-24
CA2562334C (fr) 2010-01-26
MXPA06013067A (es) 2007-02-14
AU2005250081A1 (en) 2005-12-15
ZA200609209B (en) 2008-06-25
PT1678333E (pt) 2007-08-14
TW200609357A (en) 2006-03-16
CN1950523A (zh) 2007-04-18
NO20064992L (no) 2006-10-31
US7556765B2 (en) 2009-07-07
DE502005000895D1 (de) 2007-08-02
KR100861849B1 (ko) 2008-10-07
ATE365231T1 (de) 2007-07-15
JP4787244B2 (ja) 2011-10-05
AU2005250081B2 (en) 2008-01-24
KR20070020275A (ko) 2007-02-20
BRPI0511738B1 (pt) 2013-09-24
PL1678333T3 (pl) 2007-10-31
EA008914B1 (ru) 2007-08-31
EP1678333A2 (fr) 2006-07-12
ES2287912T3 (es) 2007-12-16
US20070164491A1 (en) 2007-07-19
DE102004027440B3 (de) 2005-06-16
JP2008501854A (ja) 2008-01-24
AR049903A1 (es) 2006-09-13
PE20060119A1 (es) 2006-04-02
EG24432A (en) 2009-06-21

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