Iron ore
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Ore used as a raw material for steelmaking. Its industrial value is determined by the iron content (40-50% or more is required), the state of chemical reactions with oxygen and other elements, and the composition of the slag, but the most commonly used are magnetite, hematite, and limonite. Japan produces little iron other than a small amount of iron sand, so it depends on imports to meet most of its huge demand. → Related topics Pig iron | Iron Source : Heibonsha Encyclopedia About MyPedia Information |
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製鉄原料となる鉱石。鉄分含有量（40〜50％以上が必要），酸素その他との化合状態，鉱滓(こうさい)となる部分の組成などにより産業的価値がきまるが，多く使われるのは磁鉄鉱，赤鉄鉱，褐鉄鉱など。日本では砂鉄を少量産するほか産出が少なく，膨大な需要量のほとんどを輸入に依存する。 →関連項目銑鉄｜鉄 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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