Global Patent Index - EP 0714703 B1

EP 0714703 B1 2000-02-09 - A grinding process and a drum lining

Title (en)

A grinding process and a drum lining

Title (de)

Mahlverfahren und Auskleidung für Mahltrommel

Title (fr)

Procédé de broyage et revêtement pour tambour de broyeur

Publication

EP 0714703 B1 (EN)

Application

EP 95850200 A

Priority

SE 9404159 A

Abstract (en)

[origin: EP0714703A1] A method of grinding a batch of material, particularly ceramic material, together with a multiple of grinding media in a rotary mill drum which includes a polymer lining having elongated lifting devices which are positioned axially in the drum and which protrude radially into the drum interior. With the intention of making grinding more effective and of reducing grinding time, it is proposed in accordance with the invention that the method will comprise the steps of: rotating the drum at a constant speed in a first direction of rotation during a first time interval, so that grinding media from said grinding media multiple are brought into contact with a high-lifting side of the lifting devices as the drum rotates, to grind or disintegrate the material with a larger crush proportion and a smaller fine-grinding proportion; and - rotating the drum at said constant speed in a rotational direction opposite to the first rotational direction in a second time interval following said first time interval , so that grinding media in said grinding media multiple are brought into contact with a low-lifting side of said lifting devices opposite to the high-lifting side thereof, so as to grind the material with a smaller crush proportion and a larger fine-grinding proportion. The invention also relates to a mill lining for use with such a method. <IMAGE>

IPC 1-7 (main, further and additional classification)

B02C 17/24; B02C 17/22

IPC 8 full level (invention and additional information)

B02C 17/00 (2006.01); B02C 17/22 (2006.01); B02C 17/24 (2006.01); B24B 31/02 (2006.01); B24B 31/12 (2006.01)

CPC (invention and additional information)

B02C 17/24 (2013.01); B02C 17/225 (2013.01); B24B 31/02 (2013.01); B24B 31/12 (2013.01)

Designated contracting state (EPC)

DE ES FR GB IT NL

EPO simple patent family

EP 0714703 A1 19960605; EP 0714703 B1 20000209; AR 002457 A1 19980325; BR 9505598 A 19971104; CN 1071622 C 20010926; CN 1133220 A 19961016; DE 69514996 D1 20000316; DE 69514996 T2 20000608; ES 2143610 T3 20000516; JP 3616182 B2 20050202; JP H08206526 A 19960813; KR 100400439 B1 20031218; MX 9504956 A 19970131; SE 503673 C2 19960729; SE 9404159 D0 19941130; SE 9404159 L 19960531; TW 372905 B 19991101

INPADOC legal status


2009-08-31 [PG25 IT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2008-04-30 [PG25 ES] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2008-02-16 [REG ES FD2A] ANNOUNCEMENT OF LAPSE IN SPAIN

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2007-08-03 [REG FR ST] NOTIFICATION OF LAPSE

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2007-08-01 [NLV4] NL: LAPSED OR ANULLED DUE TO NON-PAYMENT OF THE ANNUAL FEE

- Effective date: 20070601

2007-07-25 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

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2002-01-01 [REG GB IF02] EUROPEAN PATENT IN FORCE AS OF 2002-01-01

2001-01-24 [26N] NO OPPOSITION FILED

2000-05-19 [ET] FR: TRANSLATION FILED

2000-05-16 [REG ES FG2A] DEFINITIVE PROTECTION

- Document: ES 2143610 T3

2000-03-24 [ITF] IT: TRANSLATION FOR A EP PATENT FILED

- Owner name: JACOBACCI & PERANI S.P.A.

2000-03-16 [REF] CORRESPONDS TO:

- Document: DE 69514996 20000316

2000-02-09 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE ES FR GB IT NL

1999-08-25 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19990713

1996-07-10 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19960509

1996-06-05 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE ES FR GB IT NL