PURPOSE: To make the length of a low temp. region proper and to improve the utilizing ratio of reducing gas by measuring furnace gas composition at plural points in the radius direction of a blast furnace, calculating a hydrogen gas utilizing ratio and adjusting the distribution of charged materials at the furnace top based on the calculation.
CONSTITUTION: By using sondes 8, 9 at plural positions in the height direction of a bulky zone part 6 in the blast furnace shaft part, the composition and the quantity of the furnace gas are measured and the hydrogen gas utilizing ratio is calculated based on these measured values. By obtaining the difference between these hydrogen gas utilizing ratios and based on the difference, the distribution of the charged materials at the furnace top is adjusted to improve the gas ventilation. By this method, the length of low temp. region in the blast furnace is kept so as to be suitable and the stabilized operation can be continued.
INOUE YOSHIHIRO
KUGIMIYA SADAJI
NAITO MASAAKI
