EP 1261431 A1 20021204 - APPARATUS FOR GRINDING OF PARTICULATE MATERIAL
Title (en)
APPARATUS FOR GRINDING OF PARTICULATE MATERIAL
Title (de)
VORRICHTUNG ZUR ZERKLEINERUNG VON KÖRNIGEM MATERIAL
Title (fr)
APPAREIL DE BROYAGE D'UNE SUBSTANCE PARTICULAIRE
Publication
Application
Priority
- DK PA200000147 A 20000128
- IB 0100057 W 20010119
Abstract (en)
[origin: WO0154818A1] A description is provided of a method as well as an apparatus for grinding particulate material, such as cement raw materials, cement clinker or similar materials, in a roller mill (1) by subjecting the material to pressing action in a zone (13) between opposite, rotating surfaces where the material is directed to the grinding zone via a feed shaft (11). The method is peculiar in that the material in the feed shaft (11) is accelerated through the action of gravity to a desired velocity without involving essential air admixture, whereas the apparatus is peculiar in that the feed shaft is essentially of a vertical configuration, with a downwardly reduced cross-section, where the reduction of the shaft´s cross-sectional circumference per height unit is downwardly decreasing.The described configuration of the feed shaft has, surprisingly, proved that the material over a given height of fall may attain high velocities and that this is achievable without involving admixture of air into the material. It has thus been established that it will be possible for the material to attain velocities which are close to the velocity achievable in connection with the free fall of individual particles.
IPC 1-7
IPC 8 full level
CPC (source: EP KR)
B02C 4/286 (2013.01 - EP KR)
Citation (search report)
See references of WO 0154818A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0154818 A1 20010802; AT E397493 T1 20080615; AU 2391501 A 20010807; AU 771192 B2 20040318; BR 0107809 A 20021022; CA 2397796 A1 20010802; CA 2397796 C 20090113; CN 1139431 C 20040225; CN 1400924 A 20030305; CZ 20022579 A3 20030115; CZ 299850 B6 20081210; DE 60134307 D1 20080717; DK 1261431 T3 20080721; EP 1261431 A1 20021204; EP 1261431 B1 20080604; ES 2307582 T3 20081201; JP 2003520676 A 20030708; KR 100729026 B1 20070614; KR 20020062776 A 20020729; MX PA02007282 A 20030212; PL 196219 B1 20071231; PL 356139 A1 20040614; PT 1261431 E 20080908; RU 2002123056 A 20040310; RU 2253512 C2 20050610; TW 466136 B 20011201; ZA 200204389 B 20030827
DOCDB simple family (application)
IB 0100057 W 20010119; AT 01900219 T 20010119; AU 2391501 A 20010119; BR 0107809 A 20010119; CA 2397796 A 20010119; CN 01803852 A 20010119; CZ 20022579 A 20010119; DE 60134307 T 20010119; DK 01900219 T 20010119; EP 01900219 A 20010119; ES 01900219 T 20010119; JP 2001554793 A 20010119; KR 20027008658 A 20020703; MX PA02007282 A 20010119; PL 35613901 A 20010119; PT 01900219 T 20010119; RU 2002123056 A 20010119; TW 89125627 A 20001201; ZA 200204389 A 20020531