EP1893371A2 - Verschlussstopfen für ein metallurgisches schmelzgefäss - Google Patents
Verschlussstopfen für ein metallurgisches schmelzgefässInfo
- Publication number
- EP1893371A2 EP1893371A2 EP06761977A EP06761977A EP1893371A2 EP 1893371 A2 EP1893371 A2 EP 1893371A2 EP 06761977 A EP06761977 A EP 06761977A EP 06761977 A EP06761977 A EP 06761977A EP 1893371 A2 EP1893371 A2 EP 1893371A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- opening
- gas
- channel
- stopper according
- filling body
- 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.)
- Granted
Links
- 238000002844 melting Methods 0.000 title abstract description 9
- 230000008018 melting Effects 0.000 title abstract description 9
- 238000007789 sealing Methods 0.000 claims description 18
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 239000011214 refractory ceramic Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 56
- 239000000945 filler Substances 0.000 description 19
- 238000012856 packing Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000462 isostatic pressing Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
Definitions
- the invention relates to a sealing plug for a metallurgical melting vessel.
- Such plugs serve to regulate the outflow quantity of a molten metal in the region of an outlet opening of an associated melting vessel, for example a tundish.
- Such a closure plug is usually constructed as follows: It has a rod-shaped body of at least one refractory ceramic material, which has a first upper end and a second lower end. From the first end, a bag-like opening extends in the axial direction of the rod-shaped body towards the second end, this opening terminating at a bottom spaced from the second end of the body. A gas outlet channel having a smaller cross-sectional area than the opening connects the bottom of the opening to a surface portion in the region of the second end of the body. Adjacent to the first end, the opening has fixing means on the circumference, which serve to fix a corresponding holding device, usually a holding bar, via which the closing plug is fastened to a manipulator. With the help of the manipulator, the plug is moved up and down to either seal the outlet opening of the melting vessel or release to an adjustable opening width.
- the opening and the subsequent gas outlet channel serve (also) to guide a gas through the closure plug into the molten metal.
- the gas serves for the secondary metallurgical treatment of the melt. For example, this is not intended to allow metallic inclusions in the melt Flotation be removed. Important in this context is a constant flow of the treatment gas.
- sealing plug If the sealing plug is in a position away from the outflow opening of the melting vessel, molten metal flows out. In this case, by the flow of the molten metal, a negative pressure below the lower end of the sealing plug arise. This negative pressure can become so great that the gas flow breaks off. At the same time, air can be sucked in. Both are undesirable.
- EP 1 401 600 B1 describes a generic sealing plug (referred to therein as a monoblock plug), in which a calibration device is installed in the gas outlet channel. This consists of a rod which has one or more axial gas channels. In this way, a certain flow resistance should be set.
- the known device is complicated to manufacture. In addition, it is difficult to set a certain flow resistance.
- the invention has for its object to offer a sealing plug, which is easy to manufacture and with the transport and the supply of gas, in particular inert gas, can be done effectively and safely in a molten metal.
- the invention is based on the following considerations:
- the aforementioned bag-like opening in the plug body usually has a circular cross-sectional area with a diameter of several centimeters.
- the gas outlet channel adjoining the opening has a much smaller cross-sectional area, usually with a diameter of only a few millimeters.
- the large opening usually extends over much more than half the total length of the plug body, while the gas outlet channel extends only in the second lower end portion and is correspondingly short.
- the invention is based on the idea to move the means for adjusting the gas flow resistance from the region of the gas outlet channel at the lower, second end of the sealing plug in the overlying opening.
- the opposite the gas outlet very much larger opening must be at least partially filled with a corresponding filler.
- This filler body can extend over a corresponding partial length of the opening (viewed in the axial direction of the plug body) and thereby fills the entire cross-sectional area of the opening.
- the displacement of the means for adjusting the gas flow resistance in the opening provides numerous opportunities to adjust the flow resistance individually, depending on where the opening over which Length of the filling body is formed and how many channels are arranged in which form within the filling body.
- the invention in its most general embodiment relates to a sealing plug for a metallurgical melting vessel having the following features:
- a rod-shaped body made of at least one refractory ceramic material, having a first upper end and a second lower end,
- a bag-like opening extends in the axial direction of the body towards the second end,
- the opening ends at a bottom at a distance from the second end of the body
- a gas outlet channel connects the opening to a surface portion in the region of the second end of the body
- the gas outlet channel has a cross-sectional area which is smaller than the cross-sectional area of the opening
- the said bottom of the opening can be designed arbitrarily. It can be more or less perpendicular to the axial direction of the body. It can also be curved, for example concave or convex. It is also possible, funnel-shaped view of the bottom portion - viewed in the axial direction of the sealing plug, with direct connection to the following gas outlet.
- the filler (with the gas channels running therein) can - as stated - have almost any length. Its length will depend on, among other things, how large the flow resistance is, which is desired for the gas flow in the particular application. Normally, the filler - viewed in the axial direction of the body - have a length which is at least 5% of the length of the opening. This value can be increased according to various embodiments also>10%,> 15%, to values> 25%.
- the arrangement of the filling body within the opening is almost arbitrary.
- the packing may be tight except for the gas passage area.
- An arrangement of the filling body immediately adjacent to the bottom of the opening has fluidic advantages. For this purpose, it is to be ensured that the bottom-side opening of the gas channel, which runs in the filler body or in the contact region between filler body and body of the sealing plug, is in fluid communication with the gas inlet-side opening of the gas outlet channel at the bottom end of the plug body (at the so-called plug head).
- closure plugs of the type mentioned are produced by isostatic pressing.
- the opening and the gas outlet channel is formed in situ.
- the filler can be subsequently poured. A possible manufacturing method for this is shown in the context of the subsequent description of the figures.
- the filler may also be a pressed part, which is used during manufacture or subsequently in the opening of the pre-pressed stopper body.
- An essential feature is the design of the at least one gas channel.
- This gas channel can extend in the axial direction of the packing, that is in the axial direction of the plug.
- the gas channel can run through the filler. It can also be formed on the outer wall of the filler in the form of a groove.
- the wall of the opening delimits the gas channel on the outside.
- the wall of the opening may have a groove and the filler (its peripheral surface) then bounds the groove on the inside, so that a gas channel is formed.
- the gas channel can be arranged parallel to the central longitudinal axis of the sealing plug or spirally around the central longitudinal axis.
- the length of the filling body can be increased.
- a particular advantage of the design according to the invention is that the filler is disposed within the large opening and thus has a considerable cross-sectional area, which makes it possible to guide the gas channel, for example, meandering or helical through the filler or between filler and body. Thus, its length is sometimes much greater than the shortest distance between its end (bottom and top) outlet openings.
- a porous filter such as a porous, temperature-resistant filter paper or with a porous plug.
- a porous, sponge-like element can also be provided as part of the filling body.
- Figure 1 a lower end portion of a sealing plug in longitudinal section during manufacture
- FIG. 2 an illustration analogous to FIG. 1 in the finished state with a specific profile of a gas channel in the packing.
- a lower portion 10 of a rod-shaped body of a sealing plug can be seen.
- the rod-shaped body consists of a refractory material of conventional type.
- an opening 12 extends in the body 10 and extends from an upper end (not shown) of the body 10 towards a second lower end 14 and at a distance to this end in the area of a floor 16 ends.
- a gas outlet channel 20 extends coaxially to the central longitudinal axis M - M as far as the lowermost section of the second end 14.
- FIG. 1 shows a stage of the production of the closure body, wherein the body 10 was first produced in the usual manner by isostatic pressing.
- a wire 22 is drawn in via the gas outlet channel 20, wherein the wire 22 at its free lower end has a thickening 22 d, while the portion in the gas outlet channel 20 rests, has a larger diameter (the gas outlet channel 20 largely fills) than the overlying portion 22a, which extends through the opening 12 to the first upper end of the closure body and is temporarily fixed there in a manner not shown.
- a refractory concrete is poured into the opening 12 and advanced by means of a plunger until about the hatched area above the gas outlet channel 20 is filled with the still viscous concrete, which encloses the wire 22 in the section 22a.
- the wire 22 is again removed against its feed direction. For this purpose, the wire 22 can be gripped on the head 22d and pulled down.
- a corresponding gas channel 26 is formed which continues into the gas outlet channel 20.
- burnable bodies can also be used. During the subsequent firing of the sealing plug, burning out of these inserts results in the formation of the desired gas channels in the desired arrangement and geometry.
- the pressed filler insert 24 has a spiral-shaped gas channel 26, whose lower outlet-side end extends coaxially to the central longitudinal axis M - M of the body 10.
- FIG. 3 shows a further alternative.
- the gas channel 26 is formed in the transition region of the packing 24 and the body 10.
- the filler 24 has for this purpose a spiral groove 26n on its peripheral surface 24u, which is bounded on the outside by the boundary wall 121 of the opening 12. Together of filler 24 and body 10 while the gas channel 26 is formed, which creates a fluidic connection from the opening 12 to the gas outlet 20.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Charging Or Discharging (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06761977T PL1893371T3 (pl) | 2005-06-21 | 2006-06-14 | Zatyczka zamykająca do metalurgicznego naczynia do topienia |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005029033A DE102005029033B4 (de) | 2005-06-21 | 2005-06-21 | Verschlussstopfen für ein metallurgisches Schmelzgefäß |
PCT/EP2006/005395 WO2006136285A2 (de) | 2005-06-21 | 2006-06-14 | Verschlussstopfen für ein metallurgisches schmelzgefäss |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1893371A2 true EP1893371A2 (de) | 2008-03-05 |
EP1893371B1 EP1893371B1 (de) | 2009-08-05 |
Family
ID=37227105
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06761977A Not-in-force EP1893371B1 (de) | 2005-06-21 | 2006-06-14 | Verschlussstopfen für ein metallurgisches schmelzgefäss |
Country Status (11)
Country | Link |
---|---|
US (1) | US7910050B2 (de) |
EP (1) | EP1893371B1 (de) |
CN (1) | CN101203342B (de) |
AT (1) | ATE438472T1 (de) |
BR (1) | BRPI0612520A2 (de) |
DE (2) | DE102005029033B4 (de) |
ES (1) | ES2328957T3 (de) |
PL (1) | PL1893371T3 (de) |
RU (1) | RU2384387C2 (de) |
UA (1) | UA87754C2 (de) |
WO (1) | WO2006136285A2 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL2209056T3 (pl) * | 2009-01-16 | 2012-05-31 | Refractory Intellectual Property Gmbh & Co Kg | Urządzenie kontroli przepływu w ciągłym procesie wytapiania stali odlewniczej |
ATE495840T1 (de) | 2009-03-23 | 2011-02-15 | Refractory Intellectual Prop | Feuerfester keramischer stopfen |
EP2653248B1 (de) * | 2012-04-16 | 2014-04-02 | Refractory Intellectual Property GmbH & Co. KG | Feuerfester Verschlussstopfen |
CN107498033B (zh) * | 2017-06-27 | 2019-08-23 | 益阳紫荆福利铸业有限公司 | 一种陶塞杆芯棒 |
CN107385153B (zh) * | 2017-09-05 | 2022-09-20 | 武汉科技大学 | 一种能将冶金炉内金属熔体的运动状态搅拌呈螺旋流的透气砖制作方法 |
EP3903963A4 (de) * | 2018-12-25 | 2022-12-14 | Krosakiharima Corporation | Stranggiessstopper und stranggiessverfahren |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8411596D0 (en) * | 1984-05-05 | 1984-06-13 | Thor Ceramics Ltd | Stopper |
ES2021894B3 (es) * | 1988-02-19 | 1991-11-16 | Veitscher Magnesitwerke-Actien-Gesellschaft | Fregadero de gas. |
US4946083A (en) * | 1988-12-29 | 1990-08-07 | Vesuvius Crucible Company | One-piece stopper rod |
CN2114523U (zh) * | 1992-03-26 | 1992-09-02 | 淄博市淄川区洪山特殊耐火材料厂 | 塞棒 |
PL340737A1 (en) * | 1997-11-27 | 2001-02-26 | Foseco Int | Stopper rod |
FR2787045B1 (fr) * | 1998-12-10 | 2001-02-09 | Lorraine Laminage | Piece refractaire d'injection de gaz dans un circuit de coulee de metal liquide |
GB9917888D0 (en) * | 1999-07-30 | 1999-09-29 | Foseco Int | Stopper rod |
MXPA03011534A (es) * | 2001-06-12 | 2004-03-18 | Vesuvius Crucible Co | Cierre para inyeccion fiable de gas. |
WO2005059185A1 (en) * | 2003-12-16 | 2005-06-30 | Vesuvius Crucible Company | Temperature sensing stopper rod |
ES2292008T3 (es) * | 2005-06-21 | 2008-03-01 | REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG | Barra de obturador. |
-
2005
- 2005-06-21 DE DE102005029033A patent/DE102005029033B4/de not_active Expired - Fee Related
-
2006
- 2006-06-14 AT AT06761977T patent/ATE438472T1/de active
- 2006-06-14 BR BRPI0612520-4A patent/BRPI0612520A2/pt not_active IP Right Cessation
- 2006-06-14 EP EP06761977A patent/EP1893371B1/de not_active Not-in-force
- 2006-06-14 RU RU2007145936/02A patent/RU2384387C2/ru not_active IP Right Cessation
- 2006-06-14 UA UAA200713914A patent/UA87754C2/ru unknown
- 2006-06-14 DE DE502006004455T patent/DE502006004455D1/de active Active
- 2006-06-14 US US11/916,743 patent/US7910050B2/en not_active Expired - Fee Related
- 2006-06-14 CN CN2006800224114A patent/CN101203342B/zh not_active Expired - Fee Related
- 2006-06-14 PL PL06761977T patent/PL1893371T3/pl unknown
- 2006-06-14 ES ES06761977T patent/ES2328957T3/es active Active
- 2006-06-14 WO PCT/EP2006/005395 patent/WO2006136285A2/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2006136285A2 * |
Also Published As
Publication number | Publication date |
---|---|
DE102005029033A1 (de) | 2006-12-28 |
DE502006004455D1 (de) | 2009-09-17 |
CN101203342A (zh) | 2008-06-18 |
RU2384387C2 (ru) | 2010-03-20 |
EP1893371B1 (de) | 2009-08-05 |
PL1893371T3 (pl) | 2009-11-30 |
CN101203342B (zh) | 2010-11-24 |
WO2006136285A3 (de) | 2007-03-15 |
DE102005029033B4 (de) | 2007-10-11 |
UA87754C2 (ru) | 2009-08-10 |
RU2007145936A (ru) | 2009-07-27 |
WO2006136285A2 (de) | 2006-12-28 |
ATE438472T1 (de) | 2009-08-15 |
ES2328957T3 (es) | 2009-11-19 |
US20100044402A1 (en) | 2010-02-25 |
BRPI0612520A2 (pt) | 2010-11-23 |
US7910050B2 (en) | 2011-03-22 |
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