The EIGA Process
EIGA - Electrode Induction-melting Gas Atomization
The EIGA process was developed especially for the production of reactive metal powders like titanium or zirconium. The outstanding characteristic of the process is the combination of gas atomizationm with a crucible free melting process. A rotating electrode is melted by an induction coil without any contact. A thin film of liquid metal flows down the cone of the electrode. The molten metal is then led directly through the gas nozzle system, where the metal is atomized. The particles produced solidify in an atomization tower and are collected in a powder container.
In this way we get very pure powders, free of ceramic impurities and with low oxygen contents. The high speed of solidification leads to a fine micro structure.
As raw material we need electrodes of the metal to be atomized with a length up to 500 mm and a diameter up to 50 mm. There's no change of chemical composition of raw material during atomization. For atomization we use argon only at the moment. Generally it's possible to use helium, nitrogen, or air too.
Views of the TLS gas atomizing unit
TLS Technik GmbH & Co. Spezialpulver KG
D-06733 Bitterfeld, Germany
Phone (++49-3493) 7 23 06
Fax (++49-3493) 7 24 70