Patent ID: 11897000
Assignee: VALUE ASH TECHNOLOGIES NV
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 15:
16. 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
a large-particles duct is connected to a perimetral part of a circular bottom of the particle sorting chamber.