To provide a steel slag treatment method by which steel slag soon after produced is quickly treated so as to be used as a resource under an environmentally favorable pattern/condition.
The steel slag treatment method has a step A for injecting molten slag or the like in a rotary drum in which a metallic ball group is housed, bringing the slag into contact with the metallic ball group rolling in the rotary drum to cool and pulverize the slag by the physical action of the rolling metallic ball group and a step B for bringing the pulverized slag material obtained in the step A into contact with carbon dioxide to react uncarbonated Ca in the pulverized slag material with carbon dioxide. The steel slag is treated up to granulated slag with durable and simple equipment, a pulverizing or aging treatment for recovering metal is unnecessary and such an environmental friendly slag product that high pH eluted water is not produced even when the treated slag is used for civil engineering material is obtained.
TAKAHASHI TATSUTO
HAYASHI AKIO
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