METHOD OF MANUFACTURING BLAST FURNACE GRANULATED SLAG

摘要

PROBLEM TO BE SOLVED: To provide a method of manufacturing granulated slag which has a high coarse grain rate and is dense. SOLUTION: The method of manufacturing the granulated slag comprising adding an iron oxide-containing material at <=2 mass% of the mass of molten slag flowing out of a blast furnace in terms of the weight of the iron oxide to the molten slag, than granulating the slag with water above 60 deg.C. At this time, the slag is granulated with the water at a water flow rate/slag flow rate of >=5 to <30 for an added effect. The iron oxide-containing material is preferably <=5 mass% in content as water of crystallization.