EP 0325770 B1 19920401 - GRINDING METHOD AND ARRANGEMENT
Title (en)
GRINDING METHOD AND ARRANGEMENT
Publication
Application
Priority
DE 3801229 A 19880118
Abstract (en)
[origin: US4919341A] The invention relates to a grinding method and to grinding apparatus using a ring mill, in which the air speed in an air ring surrounding the grinding track is chosen to be sufficiently low that a proportion of the material which has already been comminuted to the fineness of the finished product also falls downwards against the air stream and through the air ring, is mechanically elevated and subjected to separation, the resulting tailings being delivered back to the grinding track of the ring mill. Such a solution is distinguished by a substantially reduced pressure loss and accordingly a considerable saving of energy.
IPC 1-7
IPC 8 full level
B02C 15/00 (2006.01); B02C 23/32 (2006.01)
CPC (source: EP US)
B02C 23/32 (2013.01 - EP US); B02C 2015/002 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0325770 A2 19890802; EP 0325770 A3 19900214; EP 0325770 B1 19920401; DE 3801229 A1 19890727; DE 3869759 D1 19920507; ES 2030148 T3 19921016; US 4919341 A 19900424; ZA 889554 B 19890927
DOCDB simple family (application)
EP 88121321 A 19881220; DE 3801229 A 19880118; DE 3869759 T 19881220; ES 88121321 T 19881220; US 28905988 A 19881223; ZA 889554 A 19881221