C - Chemistry – Metallurgy – 10 – B
Patent
C - Chemistry, Metallurgy
10
B
39/33, 196/72
C10B 11/00 (2006.01) C10B 49/04 (2006.01) C10L 9/08 (2006.01)
Patent
CA 1045378
ABSTRACT A process for calcining coke, having a substantial content of volatile components, in a sloping rotary kiln in which coke is fed to the upper end of the kiln and discharged at the lower end and air is supplied to the kiln through one or more orifices in the kiln ???? in a region intermediate the ends of the kiln characterized in that the heat for maintaining the calcination operation is supplied wholly or almost wholly by combustion of volatile components distilled from the coke, said supply of air and resulting combustion causing a zone of the coke bed to become disturbed and expand thereby leading to an increase in the heat- transfer rate between gas and coke particles, the speed of rotation of the kiln, kiln draft and the supply of air being adjusted to maintain the lower limit of said expanded zone n the kiln at or above the lowermost air supply orifice in the kiln wall, the air supply being adjusted so as to achieve a desired temperature in said expanded zone, the coke being retained in motion down the kiln for at least 5 minutes after leaving said expanded zone and before discharge from the kiln.
226247
Farago Frank J.
Sood Raman R.
Stokes David M.
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