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

1997; The Iron and Steel Institute of Japan; Volume: 83; Issue: 9 Linguagem: Inglês

10.2355/tetsutohagane1955.83.9_551

1883-2954

Akito Kasai, Haruhisa Iwakiri, Tsunao Kamijo, Masakata Shimizu,

Metallurgical Processes and Thermodynamics

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 Dfine/Dlump, Vt/Vh, and gas velocity in the deadman. Where Dfine and Dlump are an average size of fine coke and lump coke in the deadman respectively, Vt is a descending speed of coke at the throat and Vh, is a renewal speed of deadman. In case of the low gas velocity, the smaller Dfine/Dlump is and the larger Vt/Vh 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.