节点：上游（原材料/资源端）位置：上游情绪：中性参考度：2/10
巴西淡水河谷公司（Vale）在提交给美国证券交易委员会（SEC）的20-F表格报告中表示，已将其伊塔比拉铁矿综合体的使用寿命延长12年，至2053年。伊塔比拉综合体位于米纳斯吉拉斯州，是该公司1942年开发的首个矿山。淡水河谷称，技术进步使伊塔比拉的矿产储量从7.597亿吨（平均铁含量45.6%）增至11.5亿吨（铁含量45.8%）。该公司提到ϼ..
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