Abstract
The softening test under the simulated conditions in a real blast furnace and the gas permeability test through the softened sinter were carried out. An attempt was made to express the pressure drop through the softened sinter bed by the pressure drop equation including the terms of first- and second-order of velocity.
From the view point of blast furnace operation, high temperature properties of sinter were evaluated by applying the test results to the mathematical gas flow model.
The main results obtained are as follows.
1) When the gas flow resistance obtained from the softening test at high temperatures is increased, the radial gas flow in the cohesive zone becomes predominant and the permeability in the blast furnace becomes worse.
2) When the high temperature properties of sinter become worse, the formation of inverse V-shaped cohesive zone prevents the increase of the total gas pressure loss in the blast furnace.
