CPC B07B 7/086 (2013.01) [B07B 9/02 (2013.01); B07B 2220/00 (2013.01)] | 16 Claims |
1. A device for sorting powder particles into ranges of particles according to one or more of a density, size, and/or shape of the powder particles, the device comprising:
a particle sorting chamber with at least one sloping side wall, the side wall sloping from a lower part of the particle sorting chamber toward an upper part of the particle sorting chamber,
wherein:
the lower part of the particle sorting chamber is larger dimensioned than the upper part;
at the upper part of the particle sorting chamber a particle flow inlet is provided for supplying a flow of the powder particles to be sorted to the particle sorting chamber;
a particle flow outlet is provided in the upper part of the particle sorting chamber for conducting sorted particles from the particle sorting chamber through a duct to at least one particle sedimentation classifier;
means for generating an upward rotating gas flow in the particle sorting chamber are provided in the lower part of the particle sorting chamber;
the upward rotating gas flow has a rotation axis corresponding to an upward axis of the particle sorting chamber; and
the device provides a closed system, in which a gas supply from the lower part of the particle sorting chamber is provided between the particle flow inlet and the particle flow outlet.
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