EP4204171A1 - Production of a metal powder - Google Patents
Production of a metal powderInfo
- Publication number
- EP4204171A1 EP4204171A1 EP21778358.8A EP21778358A EP4204171A1 EP 4204171 A1 EP4204171 A1 EP 4204171A1 EP 21778358 A EP21778358 A EP 21778358A EP 4204171 A1 EP4204171 A1 EP 4204171A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- turntable
- melt
- nozzle
- tundish
- gas nozzle
- 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 title claims abstract description 26
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 26
- 239000000843 powder Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 239000000155 melt Substances 0.000 claims abstract description 68
- 239000002923 metal particle Substances 0.000 claims abstract description 60
- 238000000889 atomisation Methods 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 230000003019 stabilising effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 71
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009690 centrifugal atomisation Methods 0.000 description 1
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 150000002736 metal compounds Chemical group 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
-
- 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
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
-
- 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
- B22F2201/00—Treatment under specific atmosphere
Definitions
- the present invention relates comprehensively to a device for producing a metal powder
- turntable having an axis of rotation, which turntable is arranged after the tundish seen in a flow direction of the melt, the turntable being rotatable in order to atomize the melt on a surface of the turntable, and
- the present invention relates to a method for producing a metal powder.
- Metal powders can be produced using various processes. In addition to physical processes such as mechanical comminution, evaporation and condensation, chemical and physical-chemical processes such as chemical reactions, reduction or decomposition of metal compounds and electrolysis are also used.
- Generic devices are used for the particularly precise production of metal powders, by means of which a physical process, namely centrifugal atomization, is carried out.
- a physical process namely centrifugal atomization
- a rapidly rotating turntable is used, with melt hitting the turntable rotating at a certain speed, due to the centrifugal force from the turntable thrown away and broken up into small droplets, which droplets then solidify into metal particles.
- CA 2170206 A1 discloses an apparatus and a method for producing a metal powder using two gas nozzles, the method comprising three basic steps, viz
- GB 2051138 A describes an apparatus for producing a metal powder comprising a primary gas nozzle and a housing within which u. a. a crucible together with associated liquid heating means, a rotating atomizing means and a rotating splash plate is arranged.
- the object of the invention is to provide an improved device for producing a metal powder.
- the metal particles should have a shape and/or size that is as defined as possible, and the size should be adjustable in a simple manner.
- existing generic devices should be easy to retrofit.
- turntable having an axis of rotation, which turntable is arranged after the tundish seen in a flow direction of the melt, the turntable being rotatable in order to atomize the melt on a surface of the turntable, and
- metal powders of an individual metal and of alloys and mixtures are regarded as metal powder, which includes metal particles, with the metal(s) being selected in particular from the group Al, Zn, Sn, Fe, Mg, Zr, W, Sb, Ni, Cu, Ag, Au can be selected.
- the tundish can be heated to prevent the melt from cooling down and to guarantee a temperature that is favorable for atomization.
- the nozzle At a lower end of the tundish, seen in the flow direction of the melt, the nozzle is provided, by means of which the melt can be poured out from the tundish onto the rotating turntable, with the pouring taking place by means of gravity. When it hits the rotating turntable, the melt atomizes and then solidifies into metal particles.
- the turntable rotates, creating the centrifugal force required to atomize the melt arises.
- the speed of the turntable is higher at an outermost edge than radially inside. This means that, depending on how the melt hits a region of the turntable, differently shaped or differently sized droplets and consequently differently shaped or differently sized metal particles are formed.
- the size and shape of the metal particles can also be controlled via the number of revolutions per unit of time if the impact area of the melt on the turntable remains the same - with a lower number of revolutions per unit of time, differently shaped or differently sized metal particles are produced than with a higher number of revolutions per unit of time.
- the turntable of the device according to the invention rotates between 50,000 rpm and 90,000 rpm, in particular between 55,000 rpm and 70,000 rpm, as a result of which particularly fine metal particles are produced.
- the device according to the invention is arranged in at least one chamber.
- the tundish it is also possible for the tundish to be located in one chamber, namely an oven chamber, and for the turntable to be arranged in a separate chamber, namely an atomization chamber.
- the chamber or chambers are preferably gas-tight in order to prevent the ingress of air, which air could lead to oxidation in the melt or in the metal particles.
- the device has a primary gas nozzle and a secondary gas nozzle, from each of which at least one gas stream is emitted.
- the gas for the gas streams is air or an inert gas, preferably N2, H2, CO, CO2, He, Ar, Kr, Xe or a mixture thereof.
- the gas flow emerging from the primary gas nozzle surrounds the nozzle at least in sections and serves to stabilize the melt emerging from the nozzle.
- the melt is surrounded by the gas flow, at least in sections, which means that it is guided from the nozzle to the turntable on the one hand and is protected from undesirable reactions on the other.
- the gas stream emerging from the outlet of the secondary gas nozzle hits the metal particles, which have already at least partially solidified and been thrown away by the turntable, seen in the radial direction after the turntable and serves on the one hand to further cool them down.
- the metal particles can be directed away from the turntable into an environment by means of this gas flow and protected from undesired reactions.
- a size and/or a shape of the metal particles can be adjusted in a simple manner by means of the gas flow emerging from the outlet of the secondary gas nozzle.
- D. H the gas flow of the secondary gas nozzle can also be used to (further) adjust the geometric properties of the metal particles.
- the geometry of the turntable also serves to set a shape and/or size of the metal particles that is as defined as possible. Therefore, in a further embodiment of the invention, it is provided that a distance, which is parallel to the axis of rotation, between the surface of the turntable and a normal plane that is normal to the axis of rotation, in which normal plane an outlet of the nozzle lies , decreases monotonically in the radial direction .
- the surface of the turntable of the device according to the invention which faces the tundish is positively curved at least in sections and/or rises linearly at least in sections.
- the surface of the turntable is at least partially parallel to the normal plane, d. H . in an operating state of the device according to the invention horizontally.
- the surface of the turntable facing the tundish is concave at least in sections.
- D. H the turntable has at least one depression in an inner area.
- the turntable has a plurality of indentations radially outwards from the inner region—the surface of such a turntable would thus have a wave-like design.
- the melt emerging from the nozzle usually hits the surface of the turntable in a depression.
- the melt which has at least partially solidified into metal particles, is at least partially thrown away from the surface of the turntable radially outwards in the direction of the secondary gas nozzle, in particular in the direction of the outlet of the secondary gas nozzle.
- the geometry of the turntable serves to guide the metal particles, at least in sections, to the outlet of the secondary gas nozzle. It is conceivable that the metal particles are essentially formed on the surface of the turntable facing the tundish and the gas stream exiting the secondary gas nozzle only slightly affects the size and/or shape of the metal particles, if at all.
- a distance, which is parallel to the axis of rotation, between the surface of the turntable and a normal plane standing normal to the axis of rotation, in which normal plane an outlet of the nozzle lies increases monotonically in the radial direction.
- the surface of the turntable of the device according to the invention which faces the tundish is negatively curved at least in sections and/or falls linearly at least in sections.
- the surface of the turntable is at least partially parallel to the normal plane, d. H . in an operating state of the device according to the invention horizontally.
- the surface of the turntable pointing towards the tundish is of convex design, at least in sections.
- D. H the turntable has at least one elevation in an inner area.
- the turntable has several elevations radially outwards from the inner area—the surface of such a turntable would thus have a wave-like design.
- the surface of the turntable facing the tundish determines the size and/or the shape of the metal particles only slightly influenced and the shaping of the metal particles takes place essentially by means of the gas flow emerging from the secondary gas nozzle.
- the turntable has an inner area and an outer area, the surface of the inner area facing the tundish extending along the radial direction and the surface of the outer area pointing to the tundish at an angle of 5° to 60°, preferably from 15° to 45°, particularly preferably from 25° to 35°, to the surface of the inner region facing the tundish.
- the tundish-facing surface of the outer portion may be sloped towards the tundish or sloped away from the tundish.
- the surface of the turntable pointing towards the tundish is concave or convex in sections.
- the turntable has at least one depression or at least one elevation.
- the distance between the normal plane and the surface of the turntable and/or a distance between a further normal plane which is normal to the axis of rotation and in which further normal plane an outlet of the secondary gas nozzle is located, and the surface of the Turntable for setting the size and / or shape of the metal particles is adjustable adj.
- D. H . on the one hand, it is conceivable that the two distances can each be varied independently of one another by means of the device according to the invention. On the other hand, it is also conceivable that the two distances together, i . H . dependent on each other, are adjustable.
- the two distances can be adjusted in order to always achieve the optimal end product.
- the outlet of the nozzle for pouring out the melt is generally lower than the outlet of the secondary gas nozzle.
- a blow-out direction of the secondary gas nozzle is parallel to the axis of rotation. This ensures on the one hand that the metal particles coming from the turntable are not thrown back onto it and on the other hand that the metal particles are further cooled. In addition, this is the easiest way to adjust the size and/or shape of the metal particles.
- the best results are achieved when the gas flow emerging from the at least one outlet of the secondary gas nozzle acts as uniformly as possible on the metal particles thrown away by the turntable Turntable surrounds at least partially circumferentially.
- the annular design of the outlet of the secondary gas nozzle, at least in sections, ensures a particularly uniform and constant gas flow.
- the blowing force and air flow can be particularly easily regulated or controlled with the ring-shaped outlet. set .
- the secondary gas nozzle preferably has at least one outlet that is designed in the form of a continuous ring.
- a blow-out direction of the primary gas nozzle points towards the melt emerging from the nozzle.
- the melt whose direction of flow—as already mentioned—follows the force of gravity, can be influenced in a targeted manner between exiting the nozzle and hitting the turntable.
- the direction of flow of the melt can be influenced/deflected by the gas flow in such a way that it hits a specific area of the turntable.
- both the strength of the gas flow and the angle at which the gas flow hits the melt can be varied.
- the size and/or the shape of the metal particles can also be influenced or adjusted as a result.
- a diameter of the nozzle, in particular of the outlet can be adjusted for dosing the melt.
- the nozzle in particular the outlet of the nozzle, typically has a diameter of 1 mm to 5 mm.
- the corresponding diameter must be large enough to prevent the outlet from being blocked by melt, and on the other hand, the diameter must be adapted to the shape and/or size of the metal particles to be achieved. The more melt that passes through the nozzle, in particular through the outlet, per unit of time, the larger the metal particles that are ejected from the turntable.
- the device comprises a sifter, with the sifter being arranged after the turntable, viewed in the direction of flow of the melt.
- the sifter can be located within the at least one chamber in which, among other things, the tundish and turntable can be arranged, are or also be arranged spatially separated from the at least one chamber.
- the sifter is a device for classifying metal particles according to a defined criterion such as particle size. Sifting usually uses the different inertial forces and flow resistances of the differently sized metal particles in a medium, for example in an air flow.
- a method for producing a metal powder which comprises the following steps:
- the method according to the invention can be summarized as follows: The at least one metal is melted in the tundish in order to obtain a melt which is then poured out through the nozzle onto the rotating turntable. From the exit of the melt from the nozzle until it hits the Melt on the rotating turntable, the melt is stabilized by means of the gas jet directed at the melt. When the melt hits the rotating turntable, the centrifugal force causes the melt to be thrown away from the rotating turntable and atomized into droplets, which then solidify into metal particles. After the metal particles leave the turntable, another gas stream acts on them, e.g. to cool the metal particles and/or adjust a size and/or shape of the metal particles.
- Fig. 1 shows a schematic sectional view of an exemplary embodiment of a device according to the invention for producing a metal powder.
- Fig. 1 shows a schematic sectional view of an exemplary embodiment of a device 1 according to the invention for producing a metal powder, which device 1 has a tundish 2 , a turntable 5 , a nozzle 7 , a primary gas nozzle 8 and a secondary gas nozzle 9 , the device 1 according to the invention being in a gas-tight chamber (Not shown) is arranged.
- the tundish 2 is used to produce a melt 3 , being at a lower point in a flow direction 6 of the melt 3
- a nozzle 7 which is fluidically connected to the tundish 2 and is suitable for pouring the melt 3 out of the tundish 2 onto the turntable 5 .
- the turntable 5 Seen in the direction of flow 6 of the melt 3 , the turntable 5 is therefore arranged after the tundish 2 and after the nozzle 7 . Furthermore, the turntable 5 rotates at 60 . 000 rpm about an axis of rotation 4 in order to atomize the melt 3 striking a surface 5a of the turntable 5 and throw it away in the form of droplets, which droplets subsequently solidify into metal particles 11 .
- the nozzle 7 has an outlet 7a, the diameter of which can be adjusted, the diameter being adjustable in a range from 1 mm to 5 mm in this exemplary embodiment.
- the nozzle 7 is completely surrounded by a primary gas nozzle 8 , which in this case is annular in cross section.
- the device 1 according to the invention has a secondary gas nozzle 9, which is arranged between the tundish 2 and the turntable 5, with an annular outlet 9a of the secondary gas nozzle 9 being located further outwards than the turntable 5 in a radial direction 10 in relation to the axis of rotation 4 located .
- the gas stream emerging from the primary gas nozzle 8 serves to stabilize the melt 3, with a blow-out direction 8a pointing towards the melt 3 emerging from the nozzle 7, in particular from the outlet 7a.
- a blow-out direction 8a pointing towards the melt 3 emerging from the nozzle 7, in particular from the outlet 7a.
- the gas stream emerging from the outlet 9a of the secondary gas nozzle 9 hits the metal particles 11 thrown away by the turntable 5 , viewed in the radial direction 10 downstream of the turntable 5 , with a discharge direction 9b being parallel to the axis of rotation 4 .
- the gas flow of the secondary gas nozzle 9 serves on the one hand for (further) cooling of the metal particles 11 and on the other hand for the purposeful removal of the metal particles 11 from the turntable 5 into an environment.
- the surface 5a of the turntable 5 has a concave shape.
- the turntable 5 has an inner area 5b and an outer area 5c, with the surface of the inner area 5b facing the tundish 2 extending along the radial direction 10 and the surface 5a of the outer area 5c facing the tundish 2 at an angle a of 25° to the surface 5a of the inner region 5b pointing towards the tundish 2 , as a result of which the majority of the metal particles 11 are conveyed to the outlet 9a of the secondary gas nozzle 9 .
- the device 1 has a sifter (not shown) for classifying the metal particles 11, the sifter being arranged spatially separately from the chamber.
- LIST OF REFERENCE NUMBERS Device for producing a metal powder Tundish melt Axis of rotation Turntable a surface b inner area c outer area flow direction nozzle a outlet b diameter primary gas nozzle a blow-out direction secondary gas nozzle a outlet b blow-out direction radial direction metal particles normal plane distance between the surface 5a and the normal plane
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50757/2020A AT524161B1 (en) | 2020-09-08 | 2020-09-08 | PREPARATION OF A METAL POWDER |
PCT/EP2021/074666 WO2022053488A1 (en) | 2020-09-08 | 2021-09-08 | Production of a metal powder |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4204171A1 true EP4204171A1 (en) | 2023-07-05 |
Family
ID=77951657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21778358.8A Pending EP4204171A1 (en) | 2020-09-08 | 2021-09-08 | Production of a metal powder |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP4204171A1 (en) |
AT (1) | AT524161B1 (en) |
WO (1) | WO2022053488A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4078873A (en) * | 1976-01-30 | 1978-03-14 | United Technologies Corporation | Apparatus for producing metal powder |
US4375440A (en) * | 1979-06-20 | 1983-03-01 | United Technologies Corporation | Splat cooling of liquid metal droplets |
CA2170206A1 (en) * | 1996-02-23 | 1997-08-24 | Yoshinobu Yashima | Method of producing powders by multi-stage dividing and rapid cooling |
KR100912830B1 (en) * | 2007-03-30 | 2009-08-18 | 일진홀딩스 주식회사 | A Device for manufacturing rapidly solidified powder alloy including Si precipitates of active material for rechargable Li-battery and a Method thereof |
KR101517584B1 (en) * | 2013-12-24 | 2015-05-08 | 한국기계연구원 | Apparatus and Method for Manufacturing Minute Powder |
KR101667204B1 (en) * | 2015-01-05 | 2016-10-19 | 공주대학교 산학협력단 | Multi Cooling System for Producing Metal and Alloy Spherical Powders |
JP6372441B2 (en) * | 2015-07-31 | 2018-08-15 | Jfeスチール株式会社 | Method for producing water atomized metal powder |
-
2020
- 2020-09-08 AT ATA50757/2020A patent/AT524161B1/en active
-
2021
- 2021-09-08 WO PCT/EP2021/074666 patent/WO2022053488A1/en unknown
- 2021-09-08 EP EP21778358.8A patent/EP4204171A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2022053488A1 (en) | 2022-03-17 |
AT524161A1 (en) | 2022-03-15 |
AT524161B1 (en) | 2023-04-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE1521124C2 (en) | Process for the production of a metal powder which consists predominantly of molybdenum and is suitable for spray coating | |
DE69012937T2 (en) | System and method for atomizing titanium based material. | |
EP4034320B1 (en) | Device for atomizing a melt stream by means of a gas | |
DE102018119194A1 (en) | DEVICE FOR PRODUCING METAL POWDER AND METHOD OF MANUFACTURING THEREOF | |
DE2126856B2 (en) | METAL POWDER MANUFACTURING METAL PROCESS AND DEVICE | |
EP1042093B1 (en) | Method and device for producing fine powder by atomizing molten materials with gases | |
EP1474224B1 (en) | Method for producing particle-shaped material | |
EP2421997B1 (en) | Production of spheroidal metal particles | |
WO2021028477A1 (en) | Method and device for breaking up an electrically conductive liquid | |
DE2555715A1 (en) | METHOD AND DEVICE FOR POWDER PRODUCTION BY SPRAYING A MOLTEN MATERIAL | |
DE3341184A1 (en) | Process for the production of ultrafine solid metal particles | |
EP0945173B1 (en) | Device and process for producing powdered material | |
EP4368318A1 (en) | Device and method for atomizing a melt stream by means of a atomizing gas | |
DE3883256T2 (en) | DEVICE AND METHOD FOR ATOMIZING LIQUIDS, IN PARTICULAR MELTED METALS. | |
DE2556960A1 (en) | PROCESS FOR MANUFACTURING METAL ATOMIZING POWDER | |
AT524161B1 (en) | PREPARATION OF A METAL POWDER | |
AT523012B1 (en) | METHOD AND DEVICE FOR THE PRODUCTION OF A METAL POWDER | |
EP0007536A1 (en) | Method and device for granulating a metal melt so as to produce powder | |
DE10127240B4 (en) | Device for treating particulate material | |
WO2011124455A1 (en) | Device for generating granules from a mineral melt | |
DE2057862C3 (en) | Method and device for producing a metal powder | |
DE10237213B4 (en) | Method and device for producing metal powder and ceramic powder | |
DE3330836C2 (en) | ||
EP1930071A1 (en) | Method for producing particles from flowable material and atomisation equipment therefor | |
DE946581C (en) | Process and device for the transfer of liquid substances into finely divided form |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20230329 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
RAX | Requested extension states of the european patent have changed |
Extension state: BA Payment date: 20230329 |