EP1750075A1 - Tiegel zur Behandlung von flüssigem Metall und Verfahren zu dessen Herstellung - Google Patents
Tiegel zur Behandlung von flüssigem Metall und Verfahren zu dessen Herstellung Download PDFInfo
- Publication number
- EP1750075A1 EP1750075A1 EP05076814A EP05076814A EP1750075A1 EP 1750075 A1 EP1750075 A1 EP 1750075A1 EP 05076814 A EP05076814 A EP 05076814A EP 05076814 A EP05076814 A EP 05076814A EP 1750075 A1 EP1750075 A1 EP 1750075A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crucible
- gas
- side wall
- refractory
- molten metal
- 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.)
- Withdrawn
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000011819 refractory material Substances 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 2
- 238000000462 isostatic pressing Methods 0.000 claims description 2
- 238000010926 purge Methods 0.000 abstract description 9
- 230000006978 adaptation Effects 0.000 abstract description 4
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 55
- 239000000155 melt Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- -1 freon Chemical compound 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
Images
Classifications
-
- 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
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details specially adapted for crucible or pot furnaces
- F27B14/10—Crucibles
-
- 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
Definitions
- the present invention relates to a vessel for the treatment of molten metal and to a process for the manufacture thereof. More particularly, the invention relates to a vessel for gas treatment of a molten metal.
- Gases are often injected into molten metal in vessels such as ladles, crucibles or tundishes for diverse purposes.
- a gas may be introduced into the bottom part of a vessel to clear the relatively cool bottom area of solidification products, e.g. to remove them from the vicinity of a bottom pour outlet where the vessel has such an outlet.
- the use of slow injection of a fine curtain of gas bubbles in the tundish assists in inclusion removal; the inclusions being attracted to the fine gas bubbles and rising upwards through the melt to the surface where they are conventionally captured by the tundish cover powder or flux.
- Gas may also be introduced for rinsing or to homogenise the melt thermally or compositionally, or to assist in dispersing alloying additions throughout the melt.
- an inert gas is used but reactive gases may also be employed, e.g. reducing or oxidising gases, when the melt compositions or components thereof needs modifying.
- gases such as nitrogen, chlorine, freon, sulphur hexafluoride, argon, and the like into molten metal, for example molten aluminium or aluminium alloys, in order to remove undesirable constituents such as hydrogen gas, non-metallic inclusions and alkali metals.
- the reactive gases added to the molten metal chemically react with the undesired constituents to convert them into a form such as a precipitate, a dross or an insoluble gas compound that can be readily separated from the remainder of the melt.
- gases or others might also be used for example with steel, copper, iron, magnesium or alloys thereof.
- the gas be introduced into the molten metal, preferably from the bottom of the recipient, in the form of a very large number of extremely small bubbles.
- the number of bubbles per unit volume increases.
- An increase in the number of bubbles and their surface area per unit volume increases the probability of the injected gas being utilised effectively to perform the expected operation.
- Document FR-A1-2,671,563 and JP-A-2000-45010 disclose crucibles for the treatment of molten metal according to the preamble of claim 1. These crucibles are provided with a porous block or plug extending through the bottom wall of the crucible. The treatment gas is injected into the molten metal from the bottom of the crucible and achieves efficiently its treatment purpose.
- Such kind of arrangement is problematic for the following reasons.
- the object of the present invention is therefore to provide a crucible for the treatment of a molten metal which would not present the inconveniences of the prior art crucibles.
- a refractory crucible for the treatment of molten metal comprising side wall(s) having an inner surface and an outer surface and a bottom wall, the crucible having gas diffusing means arranged near the bottom of the crucible and gas supply means for conveying a gas from a gas source to the gas diffusing means, wherein the gas supply means is fixedly arranged adjacent to the inner surface of the side wall or within the side wall solves the above mentioned problems.
- the crucible according to the invention can have any conventional shape; i.e. it can be polygonal, for example square or rectangular (trough-shaped) with a plurality of side walls or more conventionally, rounded with a circular single wall.
- adjacent to the inner surface of the side wall or within the side wall it is meant that the gas supply means does not extend through the bottom surface of the crucible. However, it would not be excluded to have the gas supply means extending thorough a region of the side wall which is normally not in contact with molten metal; i.e. which is above the normal level of molten metal, for example near the upper surface of the crucible.
- the crucible according to the invention can be a crucible used for the processing of metal, including melting and/or treating the metal or it can be a crucible which is temporary used, for example for treating, transporting or pouring the molten metal.
- the crucible according to the invention (i) is safer than a crucible with a hole in the bottom wall; indeed, the gas supply means being fixedly arranged adjacent to the inner surface of the side wall or within the side wall, there is no need for a hole in the bottom wall; (ii) possesses the advantage of a gas diffusing means performing its gas diffusing action from the bottom of the crucible; (iii) does not require the immediate termination of the operation when the purge plug or block is wom or has been damaged since there is no risk of leakage through the gas diffusing means; (iv) allows easy displacement of the crucible when required since there is no complicated connection with a gas supply means or rigging or support system to take into account; (v) does not require particular adaptation of the furnace; (vi) is reliable; (vii) does not require expensive and cumbersome rigging or support system.
- connection of the gas supply means to a gas source can be performed by any known technique.
- advantage can be taken from the particularly useful gas-tight connection system as disclosed in WO-A1-2004/069451 .
- the gas supply means comprises a duct fixedly arranged adjacent to the inner surface of the side wall.
- this duct is made of refractory material, preferably of the same refractory material as the crucible.
- the duct can advantageously be formed by an inward protrusion extending from the inner surface of the side wall. It can be made integral with the crucible or formed separately and then glued or cemented into place. Such a protrusion can be shaped manually or mechanically from soft material such as clay graphite or other ceramic and/or metal or can be copressed together with the crucible.
- the gas supply means might also comprise an inlet orifice arranged in the upper surface of the crucible or in the outer surface of the crucible side wall at a level which is higher than the maximum level of the molten metal.
- the gas diffusing means comprises advantageously a porous refractory plug or brick for injecting gas into molten metal through a molten metal-contacting surface with a porous refractory body substantially encased in a refractory substantially non-porous body except at the molten metal-contacting surface.
- the non-porous bodies is constituted from the crucible wall itself and the porous and non porous bodies have been co-pressed.
- the porous and non porous bodies form a monobloc entity which is manufactured separately and then fixedly attached at the bottom of the crucible.
- the document WO-A1-02/074470 discloses a purge plug or bubbling block particularly suitable for use in a crucible according to the invention.
- the present invention also relates to a process for the manufacture of a crucible which comprise the steps of
- steps a), b) and c) are carried out at once, for example by isostatic pressing.
- the gas diffusing means can be formed separately and then fixedly arranged near the bottom of the crucible.
- the voids present in the gas supply means plenum chamber under the porous body for example or the gas passage bore in the duct can be produced according to known and conventional techniques (wax, combustible material, low melting point metal or metal alloys,).
- Figs. 1 and 3 show cut view of two embodiments of crucibles according to the invention (cut in the middle in a vertical plane);
- crucibles have been represented with the reference '1.
- Each of these crucibles has a bottom wall 13 and a side wall 11 with an inner surface 12, an outer surface 15 and a top surface 14.
- the gas diffusing means 2 has a molten metal contacting surface 21 and a porous body 22 encased in a substantially non-porous (tight) body.
- This non porous body can be the crucible itself (Figs. 3, 4, 5) or a separate body 23 fixedly attached at the bottom 13 of the crucible (Figs. 1 and 2).
- the gas supplying means 3 are formed of a duct 31 extending from an orifice 32 at the top surface 14 of the wall 11 to the gas diffusing means 2.
- This duct can be a protrusion formed adjacent to the inner surface 12 of the wall as depicted on Figs. 1 to 5 or can be formed directly within the wall.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05076814A EP1750075A1 (de) | 2005-08-05 | 2005-08-05 | Tiegel zur Behandlung von flüssigem Metall und Verfahren zu dessen Herstellung |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05076814A EP1750075A1 (de) | 2005-08-05 | 2005-08-05 | Tiegel zur Behandlung von flüssigem Metall und Verfahren zu dessen Herstellung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1750075A1 true EP1750075A1 (de) | 2007-02-07 |
Family
ID=35058075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05076814A Withdrawn EP1750075A1 (de) | 2005-08-05 | 2005-08-05 | Tiegel zur Behandlung von flüssigem Metall und Verfahren zu dessen Herstellung |
Country Status (1)
| Country | Link |
|---|---|
| EP (1) | EP1750075A1 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589287A (zh) * | 2012-03-05 | 2012-07-18 | 矽明科技股份有限公司 | 一种吹气冶炼用的石墨坩埚结构 |
| JPWO2013021677A1 (ja) * | 2011-08-05 | 2015-03-05 | イビデン株式会社 | 黒鉛ルツボ |
| US20230349638A1 (en) * | 2022-04-05 | 2023-11-02 | Doggone Investment Co. LLC | Apparatus and method for production of high purity copper-based alloys |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1246828A (fr) * | 1959-10-12 | 1960-11-25 | Air Liquide | Perfectionnement aux récipients métalliques, en particulier aux creusets d'affinage |
| JPS59125249A (ja) * | 1983-01-05 | 1984-07-19 | Kawasaki Steel Corp | 非金属介在物除去用ガス吹き込み装置 |
| FR2671563A1 (fr) | 1991-01-11 | 1992-07-17 | Air Liquide | Procede de traitements metallurgiques. |
| US5219514A (en) * | 1991-03-06 | 1993-06-15 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Tundish for the continuous casting of steel |
| JP2000045010A (ja) | 1998-05-27 | 2000-02-15 | Kimura Chuzosho:Kk | るつぼ形誘導炉のガスバブリング方法 |
| WO2002074470A1 (en) | 2001-03-19 | 2002-09-26 | Vesuvius Crucible Company | Refractory plug or brick for injecting gas into molten metal |
| WO2004069451A1 (en) | 2003-02-07 | 2004-08-19 | Vesuvius Crucible Company | Device for connecting a fluid circulating line to a refractory element and refractory element |
| EP1541699A1 (de) * | 2002-04-03 | 2005-06-15 | Techcom Import-Export Gmbh | Verfahren zum mischen von stahl |
-
2005
- 2005-08-05 EP EP05076814A patent/EP1750075A1/de not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1246828A (fr) * | 1959-10-12 | 1960-11-25 | Air Liquide | Perfectionnement aux récipients métalliques, en particulier aux creusets d'affinage |
| JPS59125249A (ja) * | 1983-01-05 | 1984-07-19 | Kawasaki Steel Corp | 非金属介在物除去用ガス吹き込み装置 |
| FR2671563A1 (fr) | 1991-01-11 | 1992-07-17 | Air Liquide | Procede de traitements metallurgiques. |
| US5219514A (en) * | 1991-03-06 | 1993-06-15 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Tundish for the continuous casting of steel |
| JP2000045010A (ja) | 1998-05-27 | 2000-02-15 | Kimura Chuzosho:Kk | るつぼ形誘導炉のガスバブリング方法 |
| WO2002074470A1 (en) | 2001-03-19 | 2002-09-26 | Vesuvius Crucible Company | Refractory plug or brick for injecting gas into molten metal |
| EP1541699A1 (de) * | 2002-04-03 | 2005-06-15 | Techcom Import-Export Gmbh | Verfahren zum mischen von stahl |
| WO2004069451A1 (en) | 2003-02-07 | 2004-08-19 | Vesuvius Crucible Company | Device for connecting a fluid circulating line to a refractory element and refractory element |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 008, no. 249 (M - 338) 15 November 1984 (1984-11-15) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2013021677A1 (ja) * | 2011-08-05 | 2015-03-05 | イビデン株式会社 | 黒鉛ルツボ |
| CN102589287A (zh) * | 2012-03-05 | 2012-07-18 | 矽明科技股份有限公司 | 一种吹气冶炼用的石墨坩埚结构 |
| US20230349638A1 (en) * | 2022-04-05 | 2023-11-02 | Doggone Investment Co. LLC | Apparatus and method for production of high purity copper-based alloys |
| US11993828B2 (en) * | 2022-04-05 | 2024-05-28 | Doggone Investment Co. LLC | Apparatus and method for production of high purity copper-based alloys |
| US12234531B2 (en) | 2022-04-05 | 2025-02-25 | Doggone Investment Co. LLC | Apparatus and method for production of high purity copper-based alloys |
| US12371760B2 (en) | 2022-04-05 | 2025-07-29 | Doggone Investment Co. LLC | Apparatus and method for production of high purity copper-based alloys |
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