EP 0164512 B1 19861217 - MILLING PROCESS AND MILLING DEVICE
Title (en)
MILLING PROCESS AND MILLING DEVICE
Publication
Application
Priority
DE 3418197 A 19840516
Abstract (en)
1. Milling process in which the fine constituents of the material comminuted in a ring mill (1) are discharged pneumatically upwards by means of an air stream supplied via a nozzle ring (15) and form a finished product whilst the coarse constituents fall downwards through the nozzle ring against the air stream and are conveyed upwards again by a mechanical elevator (3), characterized in that the combination of the following features is provided for the simultaneous production of at least two finished products of different fineness : a) the air quantity and the air speed in the nozzle ring (15) are adjusted so that a preclassification is produced in the nozzle ring and the coarse constituents in a defined quantity and gradation of grain sizes fall downwards through the nozzle ring ; b) the coarse constituents conveyed upwards by the mechanical elevator (3) are subjected to a second classification in which at least a proportion of the coarse constituents is extracted as a further finished product.
IPC 1-7
IPC 8 full level
B02C 15/00 (2006.01); B02C 23/00 (2006.01); B02C 23/12 (2006.01); B02C 23/32 (2006.01)
CPC (source: EP US)
B02C 15/001 (2013.01 - EP US); B02C 23/12 (2013.01 - EP US); B02C 23/32 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0164512 A1 19851218; EP 0164512 B1 19861217; DE 3418197 A1 19851121; DE 3560030 D1 19870129; ES 543135 A0 19860601; ES 8607055 A1 19860601; US 4927086 A 19900522
DOCDB simple family (application)
EP 85103697 A 19850327; DE 3418197 A 19840516; DE 3560030 T 19850327; ES 543135 A 19850514; US 73394585 A 19850514