摘要 |
PROBLEM TO BE SOLVED: To manufacture a desirable aggregate by using rock wool which is manufactured from blast furnace slag generated inevitably in an iron-making process to use a blast furnace. SOLUTION: This aggregate is obtained by adding cement to the rock wool made from the blast furnace slag, blending them to obtain a mixture, adding a mixing agent and water to the mixture, kneading them, rotating the kneaded material in a rotationally granule-forming device to form a nearly spherical body and drying the nearly spherical body. |