包鋼鐵礦含有稀土，所以給冶煉帶來了困難。就知道日本欲出高價購買包鋼的煉鐵廢渣，然後包鋼設法回收稀土。

來源: chufang 於 2025-06-12 11:02:29 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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