EP2739927A1 - Vorrichtung zum raffinieren von metallschmelzen - Google Patents
Vorrichtung zum raffinieren von metallschmelzenInfo
- Publication number
- EP2739927A1 EP2739927A1 EP13742381.0A EP13742381A EP2739927A1 EP 2739927 A1 EP2739927 A1 EP 2739927A1 EP 13742381 A EP13742381 A EP 13742381A EP 2739927 A1 EP2739927 A1 EP 2739927A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- partitions
- rotary device
- radial
- melt
- 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
- 238000007670 refining Methods 0.000 title claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 12
- 239000002184 metal Substances 0.000 title claims abstract description 12
- 239000000155 melt Substances 0.000 title abstract description 25
- 238000005192 partition Methods 0.000 claims abstract description 22
- 239000011800 void material Substances 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 239000002893 slag Substances 0.000 description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000011833 salt mixture Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 240000006829 Ficus sundaica Species 0.000 description 1
- 241000237858 Gastropoda Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
Classifications
-
- 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
- F27D27/00—Stirring devices for molten material
-
- 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
- C22B21/00—Obtaining aluminium
- C22B21/06—Obtaining aluminium refining
- C22B21/064—Obtaining aluminium refining using inert or reactive gases
-
- 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
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
-
- 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 invention relates to a rotary device for refining
- Molten metal having a cylinder-shaped rotor fixed to a hollow shaft formed by two parallel disks connected to radial partitions and having a central cavity open at the bottom and connected at the top to a feed bore in the shaft, of which
- Hollowing out channels which are separated by partitions and wider in the radial direction.
- Aluminum is especially about
- Hydrogen and calcium Hydrogen and calcium.
- the hydrogen solubility in an aluminum melt increases with temperature, while it is very low in the solid phase.
- the gas and solid shots scattered in the melt may result in pores in the casting, thereby causing a deterioration of their mechanical properties.
- the refining of the fused metal is usually carried out by means of a rotary device which whirls in the melt and supplies to the melt dry inert gas such as argon, nitrogen or their mixture together with reactive salt mixtures.
- the gas passes through the hollow shaft into the rotor, which dissipates the gas in the form of fine bubbles in the melt at the bottom of the melting vessel.
- the bubbles pass through the melt, the hydrogen diffuses into the bubbles, rises with them to surface and escapes into the atmosphere. At the same time, the bubbles bind solid shoots and take them to the surface, where they are collected as slag.
- EP 0332292 An example of such a device is described in EP 0332292.
- the rotor is formed by two parallel discs, between which there are radial channels separated by dividing walls.
- the rotor has a central downwardly open chamber connected to a bore in the shaft and to the radial channels of the rotor.
- a WO 2004/057045 was present in order to extend the life of the rotor according to EP 0332292 and to improve its function.
- Rotary device developed by a hollow shaft, to which a rotor in the form of two superimposed and connected with four radial partitions discs is attached.
- the rotor has a central, downwardly open chamber, which is connected on the one hand with the bore in the shaft and on the other hand with widening channels between the partitions.
- a new element here are semicircular recesses on the circumference of the upper disc. There are eight recesses, so two for each channel.
- Recesses are to serve a better dispersion of the gas in the melt.
- the degassing device according to EP 2017560 differs from the latter essentially in that the same recesses are made in the upper and in the lower disk of the rotor.
- One of the embodiments of the rotor described in US 6,589,313 differs from the rotor according to EP0332292 in that the rotor is provided on the upper side with radial ribs, but have no influence on the movement of the melt under the rotor.
- the rotor according to US 6,056,803 has an upper cone-shaped part and a lower cylindrical part, in which a central cavity is located. From this excavation go out radial, open at the bottom side channels. The gas is fed through small holes directly into the channels.
- a rotor head for refining the molten metal is described, which has a central cavity below, into which gas is guided.
- At the lower rotor side are radial grooves which have a concave shape.
- a rotary device for refining metal melts comprising a cylinder-shaped rotor fixed to a hollow shaft formed by two parallel discs connected to radial partitions, and one open at the bottom and connected at the top to a feed bore in the shaft Has central excavation, from the central excavation channels emanating from the
- Partitions are separated and wider in the radial direction.
- the rotor according to the invention is provided on the lower side with radial blades.
- the blades are advantageously arcuate, oriented with their convex side in the direction of rotation.
- joints are formed, which connect the respective channel with the lower side of the rotor.
- the joints are advantageously guided along the convex flanks of the blade.
- the circumference of the rotor is provided with longitudinal ribs, which are connected to the
- the length of the longitudinal ribs corresponds to the height of the partitions.
- the length of the longitudinal ribs may correspond to the height of the rotor, wherein the ribs pass into the blade at the lower end.
- the partitions are provided with projections which protrude into the cavity.
- FIG. 2 a, b, c an embodiment of FIG. 1, with joints on the lower disc
- Fig. 3 a, b, c an embodiment of FIG. 1 with ribs whose length with the height
- FIG. 4 a, b, c an embodiment of FIG. 1 with ribs whose length with the height
- FIG. 5 a, b, c an embodiment according to FIG. 4 with joints in the lower pane
- FIGS. 6 a, b, c an embodiment substantially according to FIG. 1 with projections which are shown in FIG.
- the device according to the invention for refining molten metal according to FIG. 1 is formed by a cylindrical rotor 1, which is screwed to a shaft 2 provided with a bore intended for the supply of gas.
- the rotor 1 is formed by two parallel disks 3, 4, which are connected by radial partitions 5.
- the rotor 1 has a central cavity 6, which is open at the bottom and connected at the top to the bore in the shaft 2. Between the discs 3, 4 are through the partitions 5 separate channels 7, which emanate from the cavity 6 and are wider in the radial direction.
- radial arcuate blades 8 are mounted, which are directed with their convex side in the direction of rotation, that are bent in the direction of rotation.
- the direction of rotation is marked with an arrow.
- the number of blades 8 corresponds to the number of
- Partitions 5 The blades 8 are below the partitions. 5
- the partitions 5 merge on the lateral surface of the rotor 1 into longitudinal ribs 9 whose length l coincides with the height of the partitions 5, s. Fig. 3, or whose length I coincides with the height of the rotor 1, s. 4 and 5.
- the longitudinal ribs 9 go over at their lower end in the blades 8.
- the cross section of the blades 8 is substantially rectangular. In specific cases, it has been found to be effective to provide the lower disc 4 with joints 10 which connect the channels 7 to the lower side of the rotor 1 and along the
- the partitions 5 are provided with projections 11 which protrude into the cavity 6.
- the excavation 6 has here, in the
- the inert gas with the dispersed reactive salts is introduced through the bore of the shaft 2 into the cavity 6 of the molten rotor 1
- the rotor 1 operates similarly to the rotor of a radial pump, i. He sucks the melt from below into the cavity 6, and as a result of the centrifugal force he hurls it into the environment.
- the melt is mixed in the cavity 6 with the gas, it form fine bubbles, which are scattered together with the melt in the entire profile of the melting vessel. This effect is reinforced by the ribs 9.
- the radial vanes 8 on the lower side of the rotor 1 cause a swirling of the melt under the rotor 1, and lead to a toroidal vortex, in whose distal part the melt sinks and in the proximal part it rises.
- the impurities accumulating on the bottom of the crucible are swirled to the level of the bubbles and then carried to the surface by them.
- the protrusions 11 projecting into the cavity 6 mix the gas fed into the cavity 6 with the melt and thereby assist the generation of the bubbles.
- the shape of the rotors according to the invention causes a sinking flow of the melt and thus a thorough Aufwirbelung the impurities on the ground.
- the rotors according to the invention also have a better distribution of the speeds in the horizontal planes at the same rotational speed.
- the following table shows the maximum melt velocities at the exit from the channels of the rotor with V1 max and 10 mm below the rotor with V2 max .
- the rotor according to the invention of the variant according to FIG. 3 with a diameter of 190 mm was tested at a speed of 500 l / min in a foundry during the refining of molten aluminum during casting of pistons.
- the refining is carried out here in a conventional manner, first with nitrogen, then with chlorine, and finally reactive salt mixtures are added.
- the calcium content in the melt is determined.
- the refining is terminated when the calcium content has approached zero.
- the calcium content dropped to 3 ppm after 3 minutes, and the refining had to be continued for a further 1.5 minutes.
- the calcium content dropped below 1 ppm after 3 minutes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL13742381T PL2739927T5 (pl) | 2012-07-02 | 2013-06-26 | Urządzenie do oczyszczania ciekłych metali |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CZ20120446A CZ304029B6 (cs) | 2012-07-02 | 2012-07-02 | Rotacní zarízení k rafinaci kovové taveniny |
PCT/CZ2013/000078 WO2014005560A1 (de) | 2012-07-02 | 2013-06-26 | Vorrichtung zum raffinieren von metallschmelzen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2739927A1 true EP2739927A1 (de) | 2014-06-11 |
EP2739927B1 EP2739927B1 (de) | 2015-10-07 |
EP2739927B2 EP2739927B2 (de) | 2021-09-01 |
Family
ID=48900719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13742381.0A Active EP2739927B2 (de) | 2012-07-02 | 2013-06-26 | Vorrichtung zum raffinieren von metallschmelzen |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2739927B2 (de) |
CZ (1) | CZ304029B6 (de) |
DE (1) | DE202013102823U1 (de) |
PL (1) | PL2739927T5 (de) |
WO (1) | WO2014005560A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CZ304029B6 (cs) * | 2012-07-02 | 2013-08-28 | Jap Trading, S. R. O. | Rotacní zarízení k rafinaci kovové taveniny |
CN107519780B (zh) * | 2016-06-21 | 2023-05-19 | 上海弗鲁克科技发展有限公司 | 高效化糖设备及其转子 |
MX2024003387A (es) * | 2021-09-21 | 2024-06-19 | Foseco Int | Dispositivo giratorio para el tratamiento de metal fundido. |
WO2024062216A1 (en) | 2022-09-23 | 2024-03-28 | Foseco International Limited | Rotary device for treating molten metal |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8804267D0 (en) * | 1988-02-24 | 1988-03-23 | Foseco Int | Treating molten metal |
CA1305609C (en) | 1988-06-14 | 1992-07-28 | Peter D. Waite | Treatment of molten light metals |
US5160693A (en) * | 1991-09-26 | 1992-11-03 | Eckert Charles E | Impeller for treating molten metals |
US5527381A (en) | 1994-02-04 | 1996-06-18 | Alcan International Limited | Gas treatment of molten metals |
US6056803A (en) * | 1997-12-24 | 2000-05-02 | Alcan International Limited | Injector for gas treatment of molten metals |
ES2239680T3 (es) * | 2000-09-12 | 2005-10-01 | Alcan International Limited | Proceso y dispositivo rotatorio para añadir un material solido en particulas y gas a un baño de metal fundido. |
DE10301561A1 (de) * | 2002-09-19 | 2004-05-27 | Hoesch Metallurgie Gmbh | Rotor, Vorrichtung und Verfahren zum Einbringen von Fluiden in eine Metallschmelze |
GB2396310A (en) * | 2002-12-21 | 2004-06-23 | Foseco Int | Rotary device with vanes for dispersing a gas in a molten metal |
FR2851578B1 (fr) * | 2003-02-25 | 2007-03-02 | Lethiguel | Dispositif de purification par degazage d'un metal liquide |
CA2656999C (en) * | 2006-07-13 | 2015-08-18 | Pyrotek, Inc. | Impellar for dispersing gas into molten metal |
JP2008105084A (ja) * | 2006-10-27 | 2008-05-08 | Kyocera Corp | 溶湯金属攪拌用回転体およびこれを用いた溶湯金属の脱ガス処理装置 |
RS51225B (sr) * | 2007-07-05 | 2010-12-31 | Foseco International Limited | Rotacioni uređaj za mešanje i tretman istopljenog metala |
US8535603B2 (en) | 2009-08-07 | 2013-09-17 | Paul V. Cooper | Rotary degasser and rotor therefor |
US8524146B2 (en) | 2009-08-07 | 2013-09-03 | Paul V. Cooper | Rotary degassers and components therefor |
MX342817B (es) | 2010-07-02 | 2016-10-13 | Pyrotek Inc | Impulsor de metal fundido. |
PT105293A (pt) | 2010-09-16 | 2012-03-16 | Sounete Fabrica De Aprestos Metalicos Lda | Contentor autónomo com sistema de compactação de resíduos sólidos |
CZ304029B6 (cs) * | 2012-07-02 | 2013-08-28 | Jap Trading, S. R. O. | Rotacní zarízení k rafinaci kovové taveniny |
-
2012
- 2012-07-02 CZ CZ20120446A patent/CZ304029B6/cs unknown
-
2013
- 2013-06-26 PL PL13742381T patent/PL2739927T5/pl unknown
- 2013-06-26 WO PCT/CZ2013/000078 patent/WO2014005560A1/de active Application Filing
- 2013-06-26 EP EP13742381.0A patent/EP2739927B2/de active Active
- 2013-06-28 DE DE202013102823U patent/DE202013102823U1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO2014005560A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE202013102823U1 (de) | 2013-08-14 |
WO2014005560A1 (de) | 2014-01-09 |
PL2739927T5 (pl) | 2022-01-31 |
EP2739927B2 (de) | 2021-09-01 |
CZ2012446A3 (cs) | 2013-08-28 |
PL2739927T3 (pl) | 2016-04-29 |
EP2739927B1 (de) | 2015-10-07 |
CZ304029B6 (cs) | 2013-08-28 |
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