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KAWASAKI STEEL GIHO
Vol.6 (1974) No.1
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Distribution of Burden Materials and Gas Permeability in a Large Volume Blast Furnace

ŽR“c@F—Y(Takao Yamada)@²“¡@­–¾(Masaaki Sato)@‹{è@L‹g(Nobuyoshi Miyazaki)@“ˆ‘º@ú^˜Y(Hideo Shimamura)@“cŒû@®Ži(Seiji Taguchi)
—vŽ| :
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Synopsis :
Distributions (size of burden, layer thickness of bed, etc. ) of burden in shaft are practically measured during the charging period before No.4 blast furnace of Mizushima Works was blown in. Additionally, several fundamental experiments are carried out on the gas permeability through coke and iron ore bed with particle size of practical use. The results are summarized as follows: 1) The characteristics of burden on the gas permeability in shaft depend on its particle size. 2) The surface shape of burden in periphery zone of shaft is changed by the position of movable armour plate equipped on No.4 blest furnace, so the relative gas permeability of the center and the periphery zone of blast furnace can be charged. But the position of movable armour plate has little effect on the segregation of size and the thickness distribution in the center. 3) Radial segregation of coke in blast furnace is large, but that of iron ores is small. 4) On the travelling process from hopper to blast furnace, sinter is coarsely crushed and coke fines increase. The size distribution of raw ore does not change before and after a charge. 5) Radial distribution of gas flow resistance in shaft calculated from the present measurement is homogeneous.
–{•¶iPDF: 22P/657kbj




(c)JFE Steel Corporation, 2003