抄録
By using an experimental blast furnace of which the inner volume is 04m3 and the diameter of hearth is 440mm, the effects of some factors on the combustion zone in front of the tuyeres were investigated. The results obtained were as follows:
(1) On increasing the temperature of blast, the temperature in front of tuyeres was raised uniformly, while the CO2 content was decreased.
(2) On enriching oxygen into blast, the temperature in front of tuyeres was raised, and its rate was more than that of the temperature of blast. The extent to which CO2 exsisted was very small.
(3) On adding moisture into blast, the temperature in front of tuyeres dropped considerably.
(4) In combination with enrichment of oxygen and addition of moisture, the state of the combustion zone in front of the tuyeres could be approached to that of normal operation.
(5) When the size of coke was too small, the temperature at the lower part of the bosh was little changed. But the temperature of the upper part of the bosh was raised.
(6) When the diameter of tuyeres was small and the velocity of blast in tuyeres were increased, the temperature at the center of hearth and the lower part of the bosh was raised.
(7) On increasing the blast volume, the temperature in front of tuyeres was raised slightly.
