| 摘要 |
PROBLEM TO BE SOLVED: To provide a means for directly measuring the void ratio of a hearth part in an estimation method and a control method of the void ratio of the blast furnace hearth part. SOLUTION: In the estimation method of the void ratio of the blast furnace hearth part, a plurality of electric potential measurement points are provided in the surface of a blast furnace shell or furnace bottom bricks with intervals in the vertical direction, the differential electric potential between the electric potential measurement points is measured, and the void ratio of the charged stuff in the hearth part is estimated based on the temporal change of the measured differential electric potential when the iron-tapping is not performed in the blast furnace. The temporal change of the measured differential electric potential when the iron-tapping is not performed in the blast furnace and the iron slag production speed are compared, and the void ratio of the charged stuff in the hearth part is estimated based on the result of comparison. The void ratio is estimated by the estimating method of the void ratio of the blast furnace hearth part. In the control method of the void ratio of the blast furnace hearth part, if the estimated void ratio is lower than the preset adequate void ratio, the conditions for charged coke are adjusted to obtain the adequate void ratio. COPYRIGHT: (C)2003,JPO
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