Factors affecting coke fragmentation during pushing
During the discharge of slot-type ovens, which requires a long, narrow column of coke to be pushed bodily from the oven, problems of coke discharge have frequently arisen. The normal manifestation of such problems is the jamming of the coke mass in the oven chamber in the initial stage of the discharge. This occurrence is generally ascribed to inadequate lateral shrinkage of the coke mass from the oven walls, often combined with oven walls which are not in a good state of repair. There exists a second type of discharge problem, which becomes manifest when the ram has travelled some way through the oven chamber, when the effects of the initial lateral shrinkage have become irrelevant. In such cases, in all likelihood the jamming occurs as a result of a loss of integrity of the coke mass during its passage from the oven. A contributory cause of this occurrence is suspected to be the fracture of coke lumps under the compressive stresses imposed by the pushing ram. The present report describes the pilot-scale work performed to assess this coke fragmentation, and theoretical work aimed at predicting the likely level of coke fragmentation which could occur on the commercial scale.
Bibliographic Reference: EUR 14270 EN (1993) 56 pp., MF, ECU 4
Record Number: 199310529 / Last updated on: 1994-11-29
Original language: en
Available languages: en