| 摘要 |
<p>Disclosed is a method and apparatus for recovering valuable metals from slag and manufacturing multifunctional aggregate, wherein a reductant is fed into molten slag discharged into a slag pot or a slag reforming pot from a converter or an electric arc furnace thus recovering valuable metals from the molten slag, and the molten slag from which the valuable metals have been recovered is formed into a lightweight porous structure. Accordingly, the valuable metals (Fe, Mn) are recovered from the slag discharged from the converter or electric arc furnace, and slag having low specific gravity is ensured using foaming and controlled cooling and then formed into multifunctional aggregate. This multifunctional aggregate is advantageous because its composition can be changed to be adapted to make cement, and because of decreasing the use of fuel upon making cement, saving power consumption, lowering CO 2 emission by about 40%, exhibiting superior chemical resistance and high penetration resistance to chloride ions, and usability as cement material of concrete constructions having high durability.</p> |
