(19)

(11)

EP 0 820 572 A1

(12)

(43) Date of publication: 28.01.1998 Bulletin 1998/05 (21) Application number: 96902349.0 (22) Date of filing: 14.02.1996

(51) International Patent Classification (IPC):  F23N 3/ 08( . ) F24F 11/ 04( . ) F23N 5/ 18( . ) (86) International application number: PCT/GB1996/000309 (87) International publication number: WO 1996/030703 (03.10.1996 Gazette 1996/44)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: SI (30) Priority: 28.03.1995 GB 19950006365 (71) Applicant: British Steel plc London SE1 7SN (GB)	(72) Inventor: STEVENSON, Tony Brigg, Humberside DN20 9HS (GB) (74) Representative: Downing, Michael Philip  Fry Heath & Spence, The Old College, 53 High Street Horley, Surrey RH6 7BN Horley, Surrey RH6 7BN (GB)