EP0009433A1 - Verfahren und Vorrichtung zur Herstellung von Metallpulver aus der Schmelze eines Metalls oder einer Legierung - Google Patents
Verfahren und Vorrichtung zur Herstellung von Metallpulver aus der Schmelze eines Metalls oder einer Legierung Download PDFInfo
- Publication number
- EP0009433A1 EP0009433A1 EP79400619A EP79400619A EP0009433A1 EP 0009433 A1 EP0009433 A1 EP 0009433A1 EP 79400619 A EP79400619 A EP 79400619A EP 79400619 A EP79400619 A EP 79400619A EP 0009433 A1 EP0009433 A1 EP 0009433A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- enclosure
- cryogenic fluid
- particles
- aforementioned
- 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
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 27
- 239000002184 metal Substances 0.000 title claims abstract description 27
- 239000000843 powder Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims description 24
- 229910045601 alloy Inorganic materials 0.000 title claims description 16
- 239000000956 alloy Substances 0.000 title claims description 16
- 230000008569 process Effects 0.000 title description 5
- 239000012530 fluid Substances 0.000 claims abstract description 43
- 239000002245 particle Substances 0.000 claims abstract description 32
- 239000007787 solid Substances 0.000 claims abstract description 16
- 239000007791 liquid phase Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 229910052725 zinc Inorganic materials 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 10
- 239000007769 metal material Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 5
- 239000012071 phase Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910052753 mercury Inorganic materials 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 229910017518 Cu Zn Inorganic materials 0.000 claims description 3
- 229910017752 Cu-Zn Inorganic materials 0.000 claims description 3
- 229910017943 Cu—Zn Inorganic materials 0.000 claims description 3
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229910052729 chemical element Inorganic materials 0.000 claims 1
- 239000002923 metal particle Substances 0.000 claims 1
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 3
- 239000000919 ceramic Substances 0.000 abstract description 2
- 229920001971 elastomer Polymers 0.000 abstract description 2
- 239000003973 paint Substances 0.000 abstract description 2
- 239000005060 rubber Substances 0.000 abstract description 2
- 239000011701 zinc Substances 0.000 description 14
- 239000007788 liquid Substances 0.000 description 13
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 11
- 150000001875 compounds Chemical class 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- 239000010949 copper Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000013528 metallic particle Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- -1 magnesium nitride Chemical class 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UDHXJZHVNHGCEC-UHFFFAOYSA-N Chlorophacinone Chemical compound C1=CC(Cl)=CC=C1C(C=1C=CC=CC=1)C(=O)C1C(=O)C2=CC=CC=C2C1=O UDHXJZHVNHGCEC-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 150000004681 metal hydrides Chemical class 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000012255 powdered metal Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/12—Making metallic powder or suspensions thereof using physical processes starting from gaseous material
Definitions
- the present invention essentially relates to a process for manufacturing a metallic powder by lowering the temperature of the vapor of a molten metallic material in a closed treatment enclosure, leading to the transformation of said vapor into solid particles.
- metal material designates either a metal proper, or an alloy of at least two metals.
- metal powders consist of solid particles either of a single metal such as iron, zinc, magnesium, calcium, cadmium, etc., or of an alloy metallic, for example a magnesium-zinc alloy, or even a metallic compound, for example zinc oxide or magnesium nitride.
- Such powders find wide applications in various industrial branches, in particular for the manufacture of paints, the treatment of rubbers, in the metallurgical (sintered materials), chemical (catalysts), ceramic, pharmaceutical, etc. industries.
- a problem currently posed in the powdered metal technique is the obtaining, in industrial quantities, of extremely divided powders having an average particle size of the order of 0.08 microns, consisting of particles having a shape as regular as possible and having a minimum particle size dispersion, that is to say located in a particle size range between 0.02 and 0.13 micron
- a high vapor pressure causes accelerated evaporation of the metal bath and therefore makes the process applicable on an industrial scale.
- the use of a cryogenic fluid in the liquid phase causes very rapid cooling, therefore an energetic quenching, of the metallic vapor and allows the direct passage from the gaseous state to the solid state. This change of state and the evacuation of solid particles concomitant with that of the cryogenic fluid results in a constant renewal of the phenomenon of condensation of the vapors above the bath.
- the solid particles which are thus formed from an incipient suddenly cooled metallic vapor have a regular shape and dimensions not exceeding a few hundred angstroms.
- the cryogenic fluid is introduced into said enclosure and is continuously removed therefrom.
- a continuous circulation of cryogenic fluid allows a continuous production of powder at an optimal particle formation regime.
- the cryogenic fluid is discharged in the liquid phase.
- the cryogenic fluid is discharged in the gas phase.
- the cryogenic fluid consists of a chemically inert element or a mixture of chemically inert elements.
- cryogenic fluid makes it possible to obtain metallic powders formed from chemically pure metals.
- the cryogenic fluid consists of a chemically active element or a mixture of chemically active elements.
- cryogenic fluid allows the formation of specific chemical compounds, for example oxides, nitrides or metal hydrides.
- the cryogenic fluid consists of a mixture of chemically inert elements and chemically active elements.
- the invention also relates to an installation for implementing the aforementioned method, this installation comprising means for continuously discharging a cryogenic fluid in the liquid phase inside a closed enclosure, means for transferring, out of from said enclosure, a stream of fluid carrying solid metallic particles in suspension, and a closed separation chamber; connected to said transfer means and receiving the above-mentioned fluid stream, said separation chamber being provided with means for collecting the aforementioned solid particles and means for discharging said stream of fluid free of said particles.
- the installation comprises a melting device 1, for example an induction furnace or a heating crucible, which contains the metallic material M in the liquid state, and is closed by a cover. 2 which thus provides, above the bath, a closed enclosure 3, therefore isolated from the ambient atmosphere in which the metallic vapor is released.
- a melting device for example an induction furnace or a heating crucible, which contains the metallic material M in the liquid state, and is closed by a cover. 2 which thus provides, above the bath, a closed enclosure 3, therefore isolated from the ambient atmosphere in which the metallic vapor is released.
- a reactor 4 constituted by a tubular sleeve of section slightly smaller than that of the enclosure, open at its two ends, the lower end plunging slightly into the metal bath M and at the interior of which is concentrated most of the vapor phase of the metallic material.
- the furnace or the like 1 and the reactor 4 are made of any refractory material, of the type usually used in metallurgy, the furnace being provided with heating means (not shown) which make it possible to maintain the molten metal at the temperature necessary to obtain the desired vapor pressure.
- a pipe 5 pours out a cryogenic fluid, for example liquefied nitrogen at -196 ° C, stored in a storage device (not shown), in the reactor 4 via a funnel 6 housed in said reactor and opening out in the vicinity of the surface of the metal bath so that said fluid arrives just above the latter.
- the reactor 4 is connected, by a heat-insulated conduit 7, to a closed separation chamber 8 which communicates with the outside only by a one-way pressure limiting valve 9.
- In the chamber 8 are housed containers 11 for collecting the particles , these containers being mounted on a rotary support 10 which makes it possible to take them in turn below the duct 7.
- the reactor 4 is supplied with cryogenic liquid with a sufficient flow rate to permanently maintain, above the metal bath M, a thick layer of cryogenic liquid which exceeds the level of connection of the conduit 7 to the reactor.
- the solid particles which form in reactor 4 as a result of the condensation of metallic vapors thus remain in suspension in the cryogenic liquid which is transferred, by drawing off by means of the conduit 7, into the separation chamber 8.
- the cryogenic liquid then passes to the gaseous state, creating and maintaining in the chamber 8 a neutral atmosphere and the solid particles separate by gravity and fall into the containers 11 where they are collected to give a powder.
- the filling of these containers must be carried out in several stages owing to the reduction in the volume of the powder following the evaporation of the cryogenic liquid.
- the rotary support allows these successive filling steps to be carried out.
- the cryogenic liquid charged with particles in suspension and brought into the separation chamber 8 by the conduit 7 is received in separation vessels 12 provided with a filtering wall 13 which retains the particles and lets the liquid pass.
- the liquid thus filtered is brought, by a first lagged pipe 14, to a recovery tank 15 and from there it is returned, by a recycling pump 16 and a second lagged pipe 17, to reactor 4.
- the reactor 4 is supplied with cryogenic liquid with an insufficient flow rate to maintain a liquid layer above the metal bath.
- the vapor is condensed at the point of impact of the cryogenic liquid with the surface of the bath and the metallic particles are entrained out of the enclosure 2 by the fluid in the vapor phase. The recovery of these particles can be done by gravity.
- the metallic material can consist of a metal (Fe, Cu, Zn, Mg, Al, etc.) or an alloy (brass, bronze, etc.).
- the choice of the composition of this alloy that is to say the choice of constituents (which have different melting temperatures), and the proportions of these constituents, make it possible to adjust the kinetics of evaporation.
- an alloy having a high proportion of a metal with a low melting point, such as Mg makes it possible to obtain a metallic vapor formed almost exclusively of said metal with low melting point.
- the composition of this alloy can be determined so as to obtain, for a chosen temperature of the metal bath, a high vapor pressure of the zinc. The solid particles obtained are then formed exclusively of zinc.
- the cryogenic fluid can consist of inert liquefied elements (N2, Ar, He, etc ...) or active (02, H2, NH3 etc 7) by liquefied compounds such as hydrocarbons or a mixture formed of inert liquefied elements and active liquefied elements or else inert liquefied elements and liquefied compounds.
- inert liquefied elements N2, Ar, He, etc
- active 02, H2, NH3 etc
- the choice of the percentage of the active element or of the compound makes it possible to adjust the kinetics of the reaction of the combination of the metal with the metalloid which constitutes said element or resulting from the decomposition of said compound.
- the powder obtained after separation of the cryogenic fluid consists of zinc particles of dimension between 0.03 and 0.10 micron, and has a specific surface (BET) of 40 m2 per gram.
- the heating of the melting device 1 could be obtained for example by induction, or by means of radiation, for example concentrated solar radiation by means of an optical system or radiation produced by a laser, or also by means of an arc or an electrical resistance so as to obtain a melting and a point or overall overheating of the material to be vaporized.
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Powder Metallurgy (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT79400619T ATE193T1 (de) | 1978-09-18 | 1979-09-06 | Verfahren und vorrichtung zur herstellung von metallpulver aus der schmelze eines metalls oder einer legierung. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7826648 | 1978-09-18 | ||
| FR7826648A FR2435988A1 (fr) | 1978-09-18 | 1978-09-18 | Procede et installation de fabrication de poudre metallique a partir d'un metal ou alliage en fusion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0009433A1 true EP0009433A1 (de) | 1980-04-02 |
| EP0009433B1 EP0009433B1 (de) | 1981-09-09 |
Family
ID=9212724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP79400619A Expired EP0009433B1 (de) | 1978-09-18 | 1979-09-06 | Verfahren und Vorrichtung zur Herstellung von Metallpulver aus der Schmelze eines Metalls oder einer Legierung |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4309214A (de) |
| EP (1) | EP0009433B1 (de) |
| JP (1) | JPS5541999A (de) |
| AT (1) | ATE193T1 (de) |
| CA (1) | CA1139970A (de) |
| DE (1) | DE2960783D1 (de) |
| ES (1) | ES8100937A1 (de) |
| FR (1) | FR2435988A1 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2545394A1 (fr) * | 1983-05-04 | 1984-11-09 | Air Liquide | Procede de fabrication de poudres metalliques a partir d'un materiau metallique en fusion |
| FR2545393A1 (fr) * | 1983-05-04 | 1984-11-09 | Air Liquide | Procede de production de particules solides metalliques a partir d'un bain metallique |
| FR2660584A1 (fr) * | 1990-04-10 | 1991-10-11 | Rdm Ste Civile | Procede et dispositif de compactage de poudres. |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2626797B1 (fr) * | 1988-02-04 | 1991-04-19 | Commissariat Energie Atomique | Procede et installation pour l'amelioration de la qualite d'une poudre metallique ou ceramique |
| US5922403A (en) * | 1996-03-12 | 1999-07-13 | Tecle; Berhan | Method for isolating ultrafine and fine particles |
| US6228187B1 (en) | 1998-08-19 | 2001-05-08 | Air Liquide America Corp. | Apparatus and methods for generating an artificial atmosphere for the heat treating of materials |
| US6468497B1 (en) * | 2000-11-09 | 2002-10-22 | Cyprus Amax Minerals Company | Method for producing nano-particles of molybdenum oxide |
| US7572430B2 (en) * | 2000-11-09 | 2009-08-11 | Cyprus Amax Minerals Company | Method for producing nano-particles |
| US6491863B2 (en) | 2000-12-12 | 2002-12-10 | L'air Liquide-Societe' Anonyme A' Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes George Claude | Method and apparatus for efficient utilization of a cryogen for inert cover in metals melting furnaces |
| US7384448B2 (en) * | 2004-02-16 | 2008-06-10 | Climax Engineered Materials, Llc | Method and apparatus for producing nano-particles of silver |
| CN103990807B (zh) * | 2014-04-21 | 2017-04-12 | 江苏科创金属新材料有限公司 | 一种用于锌粉制备装置的节能设备 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1495961A (en) * | 1923-02-15 | 1924-05-27 | Int Precipitation Co | Process for the production of metal powder or dust |
| DE903777C (de) * | 1944-07-01 | 1954-02-11 | Eisenwerke Muelheim Meiderich | Verfahren zum Herstellen von Metallpulver, wie insbesondere von Stahl- oder Eisenpulver, mittels eines Granulationsverfahrens |
| US2934331A (en) * | 1955-12-22 | 1960-04-26 | Thomas J Walsh | Apparatus for making a metal slurry product |
| FR2299932A1 (fr) * | 1975-02-07 | 1976-09-03 | Anvar | Lithium tres finement divise et son procede de fabrication |
| FR2375940A1 (fr) * | 1976-12-28 | 1978-07-28 | Zaklady Bieli Cynkowej Olawa | Procede de condensation de vapeurs de zinc en une poudre de zinc a grains fins et dispositif pour la mise en oeuvre de ce procede |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3042511A (en) * | 1959-02-09 | 1962-07-03 | Dow Chemical Co | Apparatus for condensation of a metal vapor |
| US3165396A (en) * | 1961-01-09 | 1965-01-12 | Nat Res Corp | Deflection of metal vapor away from the vertical in a thermal evaporation process |
| US3151971A (en) * | 1961-03-03 | 1964-10-06 | Nat Res Corp | Vacuum vapor condensation process for producing fine metal powders |
| JPS482666U (de) * | 1971-05-31 | 1973-01-12 | ||
| US3856513A (en) * | 1972-12-26 | 1974-12-24 | Allied Chem | Novel amorphous metals and amorphous metal articles |
| US4124377A (en) * | 1977-07-20 | 1978-11-07 | Rutger Larson Konsult Ab | Method and apparatus for producing atomized metal powder |
| US4169730A (en) * | 1978-01-24 | 1979-10-02 | United States Bronze Powders, Inc. | Composition for atomized alloy bronze powders |
-
1978
- 1978-09-18 FR FR7826648A patent/FR2435988A1/fr active Granted
-
1979
- 1979-08-09 ES ES483267A patent/ES8100937A1/es not_active Expired
- 1979-08-27 US US06/070,036 patent/US4309214A/en not_active Expired - Lifetime
- 1979-09-06 DE DE7979400619T patent/DE2960783D1/de not_active Expired
- 1979-09-06 EP EP79400619A patent/EP0009433B1/de not_active Expired
- 1979-09-06 AT AT79400619T patent/ATE193T1/de not_active IP Right Cessation
- 1979-09-14 JP JP11743379A patent/JPS5541999A/ja active Granted
- 1979-09-14 CA CA000335712A patent/CA1139970A/fr not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1495961A (en) * | 1923-02-15 | 1924-05-27 | Int Precipitation Co | Process for the production of metal powder or dust |
| DE903777C (de) * | 1944-07-01 | 1954-02-11 | Eisenwerke Muelheim Meiderich | Verfahren zum Herstellen von Metallpulver, wie insbesondere von Stahl- oder Eisenpulver, mittels eines Granulationsverfahrens |
| US2934331A (en) * | 1955-12-22 | 1960-04-26 | Thomas J Walsh | Apparatus for making a metal slurry product |
| FR2299932A1 (fr) * | 1975-02-07 | 1976-09-03 | Anvar | Lithium tres finement divise et son procede de fabrication |
| FR2375940A1 (fr) * | 1976-12-28 | 1978-07-28 | Zaklady Bieli Cynkowej Olawa | Procede de condensation de vapeurs de zinc en une poudre de zinc a grains fins et dispositif pour la mise en oeuvre de ce procede |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2545394A1 (fr) * | 1983-05-04 | 1984-11-09 | Air Liquide | Procede de fabrication de poudres metalliques a partir d'un materiau metallique en fusion |
| FR2545393A1 (fr) * | 1983-05-04 | 1984-11-09 | Air Liquide | Procede de production de particules solides metalliques a partir d'un bain metallique |
| EP0125161A1 (de) * | 1983-05-04 | 1984-11-14 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Verfahren zur Herstellung von Metallpulver aus einer Metallschmelze |
| EP0125173A1 (de) * | 1983-05-04 | 1984-11-14 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Verfahren zur Herstellung erstarrter Metallkörper aus der Schmelze eines Metalls |
| FR2660584A1 (fr) * | 1990-04-10 | 1991-10-11 | Rdm Ste Civile | Procede et dispositif de compactage de poudres. |
Also Published As
| Publication number | Publication date |
|---|---|
| ES483267A0 (es) | 1980-12-01 |
| JPS5620327B2 (de) | 1981-05-13 |
| US4309214A (en) | 1982-01-05 |
| JPS5541999A (en) | 1980-03-25 |
| ATE193T1 (de) | 1981-09-15 |
| FR2435988A1 (fr) | 1980-04-11 |
| EP0009433B1 (de) | 1981-09-09 |
| DE2960783D1 (en) | 1981-11-26 |
| ES8100937A1 (es) | 1980-12-01 |
| CA1139970A (fr) | 1983-01-25 |
| FR2435988B1 (de) | 1981-03-20 |
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