| 摘要 |
PROBLEM TO BE SOLVED: To provide a method, by which in the case of injecting waste synthetic resin grain from a tuyere of a blast furnace, a large amount of the raw material can be injected without damaging the furnace condition of ventilation, liquid permeability, etc., with an inexpensive facility. SOLUTION: In the case of injecting pulverized coal and the synthetic resin grain from the separate tuyeres in the blast furnace, the charged synthetic resin grain is regulated to be in the 0.05-10.0 mm grain diameter range and 0.5-4.0 mm average grain diameter range, and the adjacent tuyeres to the synthetic resin injecting tuyeres disposed in almost equal interval, are made to the pulverized coal injecting tuyere. It is better that the ratio X/Y of the synthetic resin injecting amount X per one piece of the synthetic resin injecting tuyere and the pulverized coal injecting amount Y from the adjacent pulverized coal tuyere is made to in the range of 0.8-1.2.
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