To provide a killing material for foaming slag in a converter and a molten slag pan which can increase the size of gas bubble in the slag and accelerate gas exhausting by being mixed into the foaming slag in the converter or the molten slag pan.
The mixture of one or more kinds in ash generated in an iron-making process and combustion ash produced in a boiler and paper sludge is used as the main raw material. A binder is added into the mixture. They are compressed to form a briquette having apparent specific gravity of 1.5-2.0. As desirable case, the main raw material is composed of the paper sludge, the blast furnace ash and the combustion deposited ash in the boiler in the formulation of the prescribed range in a dry-state weight %. The formulation ratio of the ash component is defined as <30 wt.%, thus the apparent specific gravity is secured to <2.
YASHIRO MASAO
SASAKI TAKANAO
MATSUMOTO KAZUHIRO
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