| 摘要 |
<p>PURPOSE:To stably remove the impurities (Zn, Sn, Cu, etc.) contained in iron scraps at the time of making steel from the scraps. CONSTITUTION:Iron scraps are melted in an electric furnace or converter to make steel. In this case, the scraps are preheated at 550-1300 deg.C before being melted to previously remove the platings (e.g. Zn and Sn) depositing on the scraps or the impurities contained in the scraps. Consequently, since the nonferrous metals such as Zn and Sn depositing on the scraps are previously removed before melting, a steel having extremely low contents of Zn, Sn, etc., after melting is stably obtained.</p> |
