红色或黄色赭石——一种在陶土中的含铁矿石，在近东和非洲的史前人类遗址随处可见。
Red or yellow ochre, an iron-containing pigment found in some clays, is ubiquitous at early modern human sites in Africa and the Near East.
烧结矿是高炉炼铁的主要含铁原料之一，一般占高炉铁矿石用量的70%以上。
Sinter is one of the main raw materials in blast furnace iron-making process, which takes about 70% in the iron-bearing materials.
云南某高硫铁矿石因含磁黄铁矿而造成精矿含硫超标。
The concentrate from a Yunan high sulfur iron ore has a sulfur content that exceeds that specified in the standard due to the pyrrhotite.
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