Iron metal is melted down in an electric arc
furnace. The melt is teemed, slag-free, through a bottom hole
into a ladle where it is refined . The ladle is then
transferred to the atomizing station and the liquid iron
is again teemed, slag-free, through a bottom hole in the ladle
into a specially designed tundish.
From the tundish, the liquid iron flows in
through the center of a ring-shaped nozzle, where it is hit by
jets of highly pressurized water. At this stage the stream of
liquid iron explodes into fine droplets.
Air, swept along by the water jet and water
vapor arising in the atomizing process, causes superficial
oxidation of the small metal droplets. The solidified droplets
and the atomizing water are collected in a container, where they
settle as a mud. This mud powder is then de-watered and dried.
The dried powder is magnetically separated from slag particles,
screened, homogenized, and eventually transported to the
annealing and reduction unit where the particles are therefore
soft annealed, and their surface oxides and residual carbon are
reduced in a belt furnace.