THE INFLOW TO A DEADMAN OF FINE COKE GENE RATED NEAR THE LOWER PART OF THE SHAFT IN A BLAST-FURNACE

In order to clarify the descending behavior of fine coke generated nea r the lower part of the shaft in a blast furnace, the fundamental expe riment using a two dimensional cold model simulating the blast furnace was carried out. The results are as follows. Most of fine coke genera ted near the central part at the radial axis flows to the raceway and part of fine coke percolates at the slope of the deadman. The percolat ion to the deadman of fine coke was influenced by D-fine/D-Lump V-t/V- h and gas velocity in the deadman. Where D-fine and D-lump are an aver age size of line coke and lump coke in the deadman respectively, V-t i s a descending speed of coke at the throat and V-h is a renewal speed of deadman. In case of the low gas velocity, the smaller D-fine/D-lump is and the larger V-t,/V-h is, the higher ratio of fine coke in the d eadman is. In case of the high gas velocity, the fine coke does not pe rcolate to the deadman.