Applikations-und Technikzentrum Fur Energieverfahrens-umwelt-und Stromungstechnik (atz-evus)

Applikationa-und Technikzentrum Fur Energie-verfahrena Umwelt-und Stromungstechnik (atz-evus)

Andreas Emmel

Dragan Stevanovic

Gerhard Wolf

A method for producing powders that consist of substantially spherical particles from a material such as glass, ceramics or plastic that produces a highly viscous melt that solidifies at a glass transition temperature Tor at a solidification temperature T. The inventive method comprises the following steps: (a) producing a melt of a viscosity &#x3b7; in the range of from 0.1 to 100 Ns/m; (b) atomizing the melt using a first gas, the first gas having a temperature T&#x2267;Tor &#x2267;0.5Tat the outlet of the nozzle and (c) cooling off the particles produced by atomization in a cooling section downstream of the nozzle using a coolant, the temperature of the coolant being smaller than Tor T.

Method and device for producing powders that consist of substantially spherical particles

A method and apparatus for converting thermal energy into mechanical work, whereby first ( ) and second devices ( ) for storing thermal energy are alternately connected into a turbine branch (T). In order to increase efficiency, a compressed oxidizing gas ( ) is cooled to a second temperature T before passing through the first device ( ) for storing thermal energy, and the oxidizing gas is then increased, in one step, to a third temperature T when passing through the first device ( ) for storing thermal energy.

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Hahnbach, Germany

Andreas Emmel