H. Takahashi et al., BURDEN DESCENDING BEHAVIOR WITH RENEWAL OF DEADMAN IN A 2-DIMENSIONALCOLD MODEL OF BLAST-FURNACE, ISIJ international, 36(11), 1996, pp. 1354-1359
The present investigation was intended to elucidate the solid particle
s behaviour in ironmaking blast furnace when the renewal of deadman co
ke is going on. The measurement of solid particles velocity was perfor
med with a two-dimensional cold model simulating both consumption of c
oke in the raceway and renewal of the deadman. The existance of a dyna
mic boundary for the deadman was clarified by the detailed analysis of
the velocity characteristics, and size of the deadman was reduced as
the renewal rate increased. The deadman was renewed by the particles f
ed within a central, limited area at the top on the bed. Both the crit
ical area and the descending velocity near the central axis of the sha
ft became large with increasing of the renewal rate. An experimental c
orrelation was obtained to estimate the span of the critical area. Fur
ther, it was confirmed for the downflow of particles to rise from the
bottom of raceway during renewal.