| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for reutilizing steel slag by which when steel slag containing phosphorous is recycled to a steel-making stage and reused, phosphorous contained in the steel slag is efficiently removed, thus an iron component and a CaO component contained in the steel slag are effectively utilized without generating rephosphorization. <P>SOLUTION: Steel slag containing phosphorous is cooled, is thereafter separated into magnetized material 28 and nonmagnetized material 27 by magnetism and recovered. Next, the nonmagnetized material is mixed with a reducing agent, and is subjected to heating treatment after the mixing. Phosphorous oxide contained in the nonmagnetized material is reduced and vaporized to be removed. The nonmagnetized material and the magnetized material from which the phosphorous oxide is vaporized to be removed are recycled to a pig iron making stage or a steel making stage. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
