EP1215293A1 - Beschichteter Stahltiegel zum eisenfreien Schmelzen von Magnesium und Magnesiumlegierungen - Google Patents
Beschichteter Stahltiegel zum eisenfreien Schmelzen von Magnesium und Magnesiumlegierungen Download PDFInfo
- Publication number
- EP1215293A1 EP1215293A1 EP01127600A EP01127600A EP1215293A1 EP 1215293 A1 EP1215293 A1 EP 1215293A1 EP 01127600 A EP01127600 A EP 01127600A EP 01127600 A EP01127600 A EP 01127600A EP 1215293 A1 EP1215293 A1 EP 1215293A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnesium
- iron
- alloys
- steel crucible
- free
- 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
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
- C22B26/22—Obtaining magnesium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
-
- 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
- F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
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- 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 peculiar to crucible or pot furnaces
- F27B14/14—Arrangements of heating devices
- F27B14/143—Heating of the crucible by convection of combustion gases
-
- 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 peculiar to crucible or pot furnaces
- F27B14/10—Crucibles
- F27B2014/104—Crucible linings
-
- 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
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
Definitions
- the invention relates to a steel crucible for iron-free melting of Magnesium and its alloys and the storage of liquid Magnesium and its alloys.
- the Melting and casting iron or steel such as St 37
- the Solubility of magnesium in the liquid state is low and lies at a temperature of 700 ° C at only 0.05%, but already cause Iron contents over 0.004% corrosion of the magnesium materials.
- high purity particularly corrosion-resistant magnesium alloys high purity alloys
- Even iron levels below 0.001% are required.
- the control the iron content occurs through the setting of certain manganese contents in magnesium in the order of 0.2-0.5% depending on the alloy. Thereby the iron solubility drops into the required ranges.
- Zircon is used for the production of grain-refined magnesium alloys added.
- zircon forms intermetallic with the iron of the crucible Connections, so that a considerable excess of zirconium is added must to achieve the grain-refining effect.
- zircon Melted scrap in the iron crucibles, the zirconium content drops immediately and zircon has to be added in a very complex manner.
- DE19504415A1 describes a made of ceramic material Furnace housing to keep molten metal warm.
- the above, with the The material in contact with the melt is sillimanite, a mixture of Silicon oxide and aluminum oxide, however, against a magnesium melt is not stable.
- the direct heating of the melt in turn leads to this temperature gradients already mentioned. Heating from the outside is due the thickness of the lining is not possible.
- CZ 223752 describes one multilayer corundum crucible, heating coils in the corundum layers are introduced.
- Such a crucible is suitable for magnesium melts, however, does not allow heating from the outside with fossil fuels. He has the disadvantage of a very expensive introduction of the heater in the Corundum layers and an elaborate production.
- the object of the invention is therefore to provide a furnace lining develop that at the usual temperatures for magnesium melts in Range from 600-850 ° C an iron-free melting, recycling and storage of liquid magnesium and magnesium alloys and the manufacture of manganese-free magnesium alloys and the production of zirconium-containing Magnesium alloys without an excess of zirconium alloy material must be allowed.
- the inexpensive Steel crucibles can still be used and the heating of the crucibles still indirectly, i.e. electrically from the outside or through fossil fuels can be done.
- this object is achieved in that a steel crucible used for melting and storing magnesium is stuck on the inside with thin plates made of dense aluminum oxide ceramic (sintered alumina).
- sintered alumina dense aluminum oxide ceramic
- aluminum oxide is less stable than magnesium oxide and should therefore be reduced by magnesium.
- the thin plates (1) made of aluminum oxide are glued into the steel crucible (2) with the adhesive (3) in accordance with the schematic illustration of the figure in such a way that the aluminum oxide plates are firmly connected to the steel.
- the adhesive adheres to the steel crucible wall as well as to the sintered alumina plates in spite of the different thermal expansion so that the plates remain firmly attached to the steel crucible.
- the thickness of the aluminum oxide plates that abut each other is chosen so thin that, despite the insulating effect of the aluminum oxide, the steel crucible can be heated (4) from the outside.
- the plates are between 2 and 20 mm, preferably between 3 and 10 mm, thick and are otherwise of any size, but which is adapted to the dimensions of the crucible to be lined. If large flat surfaces are bricked up, the plates are additionally anchored to the steel crucible.
- plates made of sintered alumina (main phase ⁇ -corundum) with the dimensions 50x25x4 mm are glued into a steel kettle with a volume of 10 liters.
- a ceramic mass with a composition of 85% Al 2 O 3 , 14.5% MgO and 0.5% SiO 2 together with soda water glass in a ratio of 6: 1 is used as the adhesive.
- the lined crucible is heated indirectly in an electrically resistance-heated oven at a heating rate of 5 K / minute and 10 kg of pure magnesium are melted and kept at a melt temperature of 720 ° C. for 5 hours. After the furnace has been exhausted, it is switched off and cooled down.
- the lining was not attacked and adhered firmly to the steel crucible wall despite the temperature change.
- the iron content of the starting material did not change. It was 0.026 mass% in the starting material and 0.023 mass% in the product.
- Example 2 In the steel crucible bricked with aluminum oxide plates from Example 1 were 10 melts with interim cooling after each melt performed with magnesium alloys. The brickwork was liable despite the Temperature change still firmly on the steel crucible wall. An increase in There was no iron content in the alloys.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Coating With Molten Metal (AREA)
- Laminated Bodies (AREA)
- Paints Or Removers (AREA)
Abstract
Description
- durch unvermeidliche Temperaturschwankungen bilden sich Manganauscheidungen zum Beispiel zusammen mit Aluminium, die als Partikel in der Schmelze nach unten sinken und einen Tiegelschlamm bilden, der regelmäßig entfernt werden muß.
- Es können keine manganfreien Legierungen in den Eisentiegeln erzeugt werden, die für die Korrosionsbeständigkeit ausreichend geringe Eisengehalte haben.
- Das Erschmelzen von zirkonhaltigen Magnesiumlegierungen in Eisentiegeln ist nur mit einem grossen Überschuss an zirkonhaltigem Material zur Schmelze möglich, da Zirkon durch das Eisen ausgefällt wird.
- Ein Recycling von zirkonhaltigen Magnesiumwerkstoffen in Eisentiegeln führt zu einem Absinken des Zirkongehaltes, der dann wieder aufwendig ergänzt werden muss.
- Eine Verunreinigung der Schmelze mit Eisen, bei Beheizung von aussen, tritt nicht auf.
- Zirkonhaltige Magnesiumlegierungen können, bei Beheizung von aussen, ohne Zirkonüberschuss hergestellt werden.
- Recycling von zirkonhaltigen Magnesiumlegierungen ohne Nachlegierung von Zirkon, bei Beheizung von aussen, ist möglich.
- Ein Verschleiss der Eisentiegel tritt nicht auf.
- Manganfreie Magnesiumlegierungen können, bei Beheizung von aussen, hergestellt werden.
Claims (5)
- Stahltiegel zum eisenfreien Schmelzen und/oder Aufbewahren von flüssigem Magnesium und Magnesiumlegierungen, dadurch gekennzeichnet, dass auf der Innenwand des indirekt beheizten Tiegels dünne Sintertonerdeplatten aufgeklebt sind.
- Stahltiegel zum eisenfreien Schmelzen und/oder Aufbewahren von flüssigem Magnesium und Magnesiumlegierungen gemäß Anspruch 1, dadurch gekennzeichnet, dass die Sintertonerdeplatten eine Stärke von 2 bis 20 mm, vorzugsweise 3 bis 10 mm aufweisen.
- Stahltiegel zum eisenfreien Schmelzen und/oder Aufbewahren von flüssigem Magnesium und Magnesiumlegierungen gemäß den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass der Kleber eine keramische Masse mit einer Zusammensetzung von 85% Al2O3, 14,5% MgO und 0,5% SiO2 zusammen mit Natronwasserglas im Verhältnis 1:1 bis 6:1, vorzugsweise 4:1 ist.
- Verfahren zum eisenfreien Schmelzen und/oder Aufbewahren von flüssigem Magnesium und Magnesiumlegierungen in einem Stahltiegel nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, dass die eisenfreie Magnesiumlegierung manganfrei hergestellt wird.
- Verfahren zum eisenfreien Schmelzen und/oder Aufbewahren von flüssigem Magnesium und Magnesiumlegierungen in einem Stahltiegel nach den Ansprüchen 1 bis 3 dadurch gekennzeichnet, dass eine zirkonhaltige Magnesiumlegierung ohne Zugabe von überschüssigem Zirkonlegierungsmaterial hergestellt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10063020A DE10063020C2 (de) | 2000-12-16 | 2000-12-16 | Stahltiegel zum eisenfreien Schmelzen von Magnesium und Magnesiumlegierungen |
DE10063020 | 2000-12-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1215293A1 true EP1215293A1 (de) | 2002-06-19 |
EP1215293B1 EP1215293B1 (de) | 2006-04-26 |
Family
ID=7667611
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01127600A Expired - Lifetime EP1215293B1 (de) | 2000-12-16 | 2001-11-20 | Beschichteter Stahltiegel und Verfahren zum eisenfreien Schmelzen von Magnesium und Magnesiumlegierungen |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1215293B1 (de) |
AT (1) | ATE324468T1 (de) |
DE (2) | DE10063020C2 (de) |
DK (1) | DK1215293T3 (de) |
ES (1) | ES2259307T3 (de) |
PT (1) | PT1215293E (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100386584C (zh) * | 2003-02-21 | 2008-05-07 | 清华大学 | 一种用于镁合金熔炼的坩埚及其制备工艺 |
CN102538457A (zh) * | 2012-02-21 | 2012-07-04 | 四川有色新材料科技股份有限公司 | 一种生产焊料的熔锡炉 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10201592A1 (de) * | 2002-01-16 | 2003-10-02 | Franz Hehmann | Kontinuierliches Bandgießen für hochreine Bänder auf Magnesiumbasis |
CN112179135A (zh) * | 2020-08-24 | 2021-01-05 | 中国工程物理研究院材料研究所 | 一种熔炼金属的一体式坩埚 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB454506A (en) * | 1935-04-01 | 1936-10-01 | Erik Harry Eugen Johansson | An improved method of providing crucibles and tools for use in contact with molten masses with a protective coating |
JPS5364667A (en) * | 1976-11-20 | 1978-06-09 | Sumitomo Electric Ind Ltd | Treating method for sludge of heavy metals |
US5248477A (en) * | 1991-09-12 | 1993-09-28 | The Dow Chemical Company | Methods for producing high purity magnesium alloys |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE975682C (de) * | 1944-04-23 | 1962-05-03 | Otto Junker | Verfahren und Ofen zum Schmelzen von Magnesium und dessen Legierungen |
DE19504415B4 (de) * | 1994-06-24 | 2004-12-02 | Denso Corp., Kariya | Warmhalteofen für eine Metallschmelze und Verfahren zur Aufnahme von Metallschmelze in einem derartigen Ofen |
-
2000
- 2000-12-16 DE DE10063020A patent/DE10063020C2/de not_active Expired - Fee Related
-
2001
- 2001-11-20 AT AT01127600T patent/ATE324468T1/de not_active IP Right Cessation
- 2001-11-20 PT PT01127600T patent/PT1215293E/pt unknown
- 2001-11-20 EP EP01127600A patent/EP1215293B1/de not_active Expired - Lifetime
- 2001-11-20 ES ES01127600T patent/ES2259307T3/es not_active Expired - Lifetime
- 2001-11-20 DK DK01127600T patent/DK1215293T3/da active
- 2001-11-20 DE DE50109615T patent/DE50109615D1/de not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB454506A (en) * | 1935-04-01 | 1936-10-01 | Erik Harry Eugen Johansson | An improved method of providing crucibles and tools for use in contact with molten masses with a protective coating |
JPS5364667A (en) * | 1976-11-20 | 1978-06-09 | Sumitomo Electric Ind Ltd | Treating method for sludge of heavy metals |
US5248477A (en) * | 1991-09-12 | 1993-09-28 | The Dow Chemical Company | Methods for producing high purity magnesium alloys |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Section Ch Derwent World Patents Index; Class M25, AN 1970-24071R, XP002196680 * |
DATABASE WPI Section Ch Week 197829, Derwent World Patents Index; Class A81, AN 1978-52100A, XP002196681 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100386584C (zh) * | 2003-02-21 | 2008-05-07 | 清华大学 | 一种用于镁合金熔炼的坩埚及其制备工艺 |
CN102538457A (zh) * | 2012-02-21 | 2012-07-04 | 四川有色新材料科技股份有限公司 | 一种生产焊料的熔锡炉 |
Also Published As
Publication number | Publication date |
---|---|
DE50109615D1 (de) | 2006-06-01 |
DE10063020A1 (de) | 2001-08-16 |
ATE324468T1 (de) | 2006-05-15 |
DK1215293T3 (da) | 2006-05-29 |
ES2259307T3 (es) | 2006-10-01 |
EP1215293B1 (de) | 2006-04-26 |
PT1215293E (pt) | 2006-08-31 |
DE10063020C2 (de) | 2002-01-24 |
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