(19)

(11)

EP 1 021 571 A1

(12)

(43) Date of publication: 26.07.2000 Bulletin 2000/30 (21) Application number: 99929649.4 (22) Date of filing: 28.07.1999

(51) International Patent Classification (IPC)7: C21C 7/00, F27B 7/00 (86) International application number: PCT/IB9901/334 (87) International publication number: WO 0008/216 (17.02.2000 Gazette 2000/07)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV RO SI (30) Priority: 07.08.1998 ZA 9807125 (71) Applicant: IPCOR N.V. Curaçao (AN)	(72) Inventor: FOURIE, Louis Johannes 0157 Pretoria (ZA) (74) Representative: Stuttard, Garry Philip  Urquhart-Dykes & LordTower HouseMerrion Way Leeds LS2 8PA Leeds LS2 8PA (GB)