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(11)

EP 1 537 371 A1

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(43) Date of publication: 08.06.2005 Bulletin 2005/23 (21) Application number: 03730280.9 (22) Date of filing: 16.06.2003

(51) International Patent Classification (IPC)7: F27B 7/34, F27B 7/36, F23D 17/00, F23C 7/00, F23L 7/00 (86) International application number: PCT/FI2003/000479 (87) International publication number: WO 2004/001310 (31.12.2003 Gazette 2004/01)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 24.06.2002 FI 20021223 (71) Applicant: Andritz Oy 00180 Helsinki (FI)	(72) Inventors: NIKUNEN, Hannu FIN-01480 Vantaa (FI) AHVENAINEN, Arto FIN-78400 Varkaus (FI) ARPALAHTI, Olli FIN-78300 Varkaus (FI) (74) Representative: Wiedemann, Peter  Hoffmann - EitlePatent- und RechtsanwälteArabellastrasse 4 81925 München 81925 München (DE)