EP 0379711 B1 19920318 - METHOD OF SIFTING FINE MATERIALS, AND APPARATUS FOR CARRYING OUT THE METHOD
Title (en)
METHOD OF SIFTING FINE MATERIALS, AND APPARATUS FOR CARRYING OUT THE METHOD
Publication
Application
Priority
- DE 3844008 A 19881227
- DE 3915552 A 19890512
Abstract (en)
[origin: EP0379711A1] The subject of the invention is a method of screening particle-shaped material with an extremely low mass in a gas stream which, originating from a mill, is introduced into a sifting drum (1) with a preferably vertical axis (2) and rotates in the latter. Under the effect of the centrifugal force which is formed, material particles from a specific mass upwards are separated out as coarse material whilst gas with particles of material with a lower mass, so called fine-grade material, is fed to a tubular material discharge (4) arranged concentrically with respect to the drum axis in order to pass into a filter where a separation into gas and fine-grade material occurs. The material/gas mixture introduced into the drum is initially preaccelerated mechanically to a specific circumferential speed and, subsequently, the preaccelerated material/gas mixture is accelerated to the final circumferential speed by means of high-speed gas jets additionally introduced approximately tangentially into the drum. <IMAGE>
IPC 1-7
IPC 8 full level
B07B 7/083 (2006.01)
CPC (source: EP)
B07B 7/083 (2013.01)
Designated contracting state (EPC)
AT BE CH DE ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0379711 A1 19900801; EP 0379711 B1 19920318; AT E73694 T1 19920415; DE 58900995 D1 19920423; ES 2030258 T3 19921016
DOCDB simple family (application)
EP 89123623 A 19891220; AT 89123623 T 19891220; DE 58900995 T 19891220; ES 89123623 T 19891220