EP 0347386 A1 19891220 - Method to simultaneously pulverize and vaporize metals into particles of varied size distribution.
Title (en)
Method to simultaneously pulverize and vaporize metals into particles of varied size distribution.
Title (de)
Verfahren zur gleichzeitigen Pulverisierung und Verdampfung von Metallen mit variabler Grössenverteilung.
Title (fr)
Procédé de pulvérisation et de vaporisation simultanée de métaux en particules à distribution de taille variable.
Publication
Application
Priority
CH 225388 A 19880613
Abstract (en)
The metal to be pulverized is subjected to an electric arc in a closed vessel containing a gas which is dissociated by the arc. The metal melts at least partially and the gas dissolves into the molten metal where it reassociates and, due to the binding energy, causes the metal to evaporate. Simultaneously, some portions of molten metal migrate by convection to cooler zones whereby oversaturation by the gas occurs which results into bubble formation. The bubbles burst and metal particles are spattered away, the rates of both evaporation and spattering depending on the temperature differences of the hotter and lesser hot zones. Pulverization is periodically interrupted to periodically disturb thermal and dynamic operative conditions which evolve to equilibrium.
IPC 1-7
IPC 8 full level
B22F 9/14 (2006.01)
CPC (source: EP)
B22F 9/14 (2013.01)
Citation (search report)
- [X] GB 2176582 A 19861231 - DAIDO STEEL CO LTD
- [A] WO 8404065 A1 19841025 - NUCLEAR METALS INC [US]
- [AD] US 4689075 A 19870825 - UDA MASAHIRO [JP], et al
- [A] FR 550891 A 19230322
- [A] FR 937763 A 19480826
- [A] US 4238427 A 19801209 - CHISHOLM DOUGLAS S [US]
Designated contracting state (EPC)
AT DE FR IT
DOCDB simple family (publication)
EP 0347386 A1 19891220; CH 676681 A5 19910228; JP H0234707 A 19900205
DOCDB simple family (application)
EP 89810438 A 19890609; CH 225388 A 19880613; JP 14691389 A 19890612