The Inflow to a Deadman of Fine Coke Generated near the Lower Part of the Shaft in a Blast Furnace

Abstract

In order to clarify the descending behavior of fine coke generated near the lower part of the shaft in a blast furnace, the fundamental experiment using a two dimensional cold model simulating the blast furnace was carried out. The results are as follows.
Most of fine coke generated 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 percolation 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 average size of fine coke and lump coke in the deadman respectively, V_t is 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 deadman is. In case of the high gas velocity, the fine coke does not percolate to the deadman.