| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the conventional problem that, although copper concentration in a molten-iron phase and iron concentration in a molten-copper phase can be reduced by melting scrap iron accompanying copper in an oxygen-free atmosphere and separating the molten-copper phase of high specific gravity and the molten-iron phase of low specific gravity, it is practically impossible to reduce copper content in the molten-iron phase to <=4%. SOLUTION: When separating and removing copper from scrap iron accompanying copper, the scrap iron is melted together with lead and carbon, and the resultant Fe-C-Pb ternary melt is separated into two liquid phases of molten-iron phase and molten-lead phase and copper is distributed in such a way that copper quantity is larger in the molten-lead phase than in the molten-iron phase (copper distribution ratio: >2) to reduce copper concentration in the molten-iron phase. By this method, the copper content in the molten-iron phase can be reduced to a value not higher than 0.2 wt.% and infinitely close to 0 wt.%. Further, by slowly cooling the molten-lead phase, the copper component distributed in the molten-lead phase can be separated and recovered by the difference in specific gravities.</p> |
