The effects of blend and carbonisation variables on coke discharge
Since the introduction of slot-type coke ovens, coke-oven operators have, on occasion, experienced difficulties during discharge. These problems often occurred when carbonising blends developed high coking pressures. The damage caused by excessive pressures, and the loss of production caused by disrupted pushing schedules arising from oven "stickers" are costly. The present report describes work undertaken into these problems using a 300 kg capacity movable-wall oven. The principal factors which produced high coking pressures were shown to be low-volatile matter content of the oven blend, and high charge bulk density. The vertical expansion of the charge was shown to be strongly dependent on its coking pressure. The CRE coke pushing study makes use of the fraction (ß) of the applied ram pressure which is diverted to the oven walls during compression of the coke. It was found that high values of ß were associated with charges of low volatile-matter content, those which had insufficient high-temperature coke finishing and also with charges having low post-plastic vertical contraction. It was concluded that low lateral shrinkage of the charge was likely to be the principal source of coke pushing difficulties in ovens of good condition.
Bibliographic Reference: EUR 12082 EN (1989) MF, 177 pp., ECU 8, blow-up copy ECU 15
Record Number: 198910422 / Last updated on: 1994-12-01
Original language: en
Available languages: en