(19)
(11) EP 0 159 903 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.05.1987 Bulletin 1987/21

(43) Date of publication A2:
30.10.1985 Bulletin 1985/44

(21) Application number: 85302660

(22) Date of filing: 16.04.1985
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 18.04.1984 GB 8410129

(71) Applicant: EXXON RESEARCH AND ENGINEERING COMPANY
 ()

(72) Inventors:
  • Heuschkel, Guenther, Dr.
     ()
  • Kirschbaum, Otto Manfred
     ()
  • Pfeifer, Klaus Arno
     ()

   


(54) Process and apparatus for the production of high quality calcined coke


(57) A process and apparatus for the production of high quality calcined coke are described. The coke feed (e.g. green coke from a delayed coker) is heated at a bulk temperature of from 650 to 850°C under conditions such that the coke heating rate is no more than 100°C/minute until from 50 to 90 weight percent of the volatile matter content is removed, whereafter the heated coke is calcined at a bulk temperature of from 1350 to 1470°C for at least 10 minutes to produce a relatively hard and non-friable calcined coke. Preferably the calcined coke is produced in a rotary hearth furnace divided by an annular radiation shield into a central high temperature calcining zone and a surrounding devolatilizing zone, the radiation shield defining with the hearth an uninterrupted gap of sufficient width for coke to pass from the devolatilizing zone to the central zone but sufficiently narrow to prevent coke in the devolatilizing zone being substantially affected by heat generated in the central zone.






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