EP 0222803 B1 19891004 - HYDRAULIC CLASSIFYING PROCEDURE AND MEANS
Title (en)
HYDRAULIC CLASSIFYING PROCEDURE AND MEANS
Publication
Application
Priority
FI 851763 A 19850503
Abstract (en)
[origin: WO8606653A1] Hydraulic classifying procedure and apparatus wherein particulate material transported by a liquid is divided in a centrifugal field established in a cylindrical, substantially vertical classifying space (1) into a fines product consisting of lighter particles, this product becoming separated in the centre of the centrifugal field, and a coarse product consisting of heavier particles, which is separated on the outer margin of the centrifugal field and descends in a spiralling flow conforming to the margin of the field, to the lower end of the classifying space. As taught by the invention, the coarse product is removed from the centrifugal field through an annular gap (3) formed on the lower end of the classifying space (1), using in aid a separate liquid flow conducted tangentially in relation to the centrifugal field and running tangentially to said gap. The coarse product may be removed together with the liquid flow to a hydrocyclone (10) which separates the coarse product, whereafter the liquid can be returned to the classifying process to serve as fluid medium in the classification taking place in the centrifugal field.
IPC 1-7
IPC 8 full level
B03B 5/34 (2006.01); B04C 5/18 (2006.01); B04C 5/181 (2006.01); B04C 9/00 (2006.01)
CPC (source: EP)
Designated contracting state (EPC)
AT DE FR GB SE
DOCDB simple family (publication)
WO 8606653 A1 19861120; AU 5864886 A 19861204; AU 596592 B2 19900510; DE 3665996 D1 19891109; DK 163644 B 19920323; DK 163644 C 19920817; DK 614886 A 19870123; DK 614886 D0 19861218; EP 0222803 A1 19870527; EP 0222803 B1 19891004; FI 80837 B 19900430; FI 80837 C 19900810; FI 851763 A0 19850503; FI 851763 L 19861104; HU 198405 B 19891030; HU T45925 A 19880928; JP S62502735 A 19871022
DOCDB simple family (application)
FI 8600045 W 19860505; AU 5864886 A 19860505; DE 3665996 T 19860505; DK 614886 A 19861218; EP 86902838 A 19860505; FI 851763 A 19850503; HU 311986 A 19860505; JP 50274186 A 19860505