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含铁石英岩古风化壳型富铁矿以矿石含铁量高(50～70%)和规模极其巨大(可达数十亿吨)称著.从矿石构造结构和物质成分特点来看,它具有以下与其他类型铁矿石不同的鉴别特征:1)矿石具有疏松多孔状构造、粉末状构造(反映从含铁石英岩中淋滤溶解走的石英等多于充填沉淀进来的赤铁矿、针铁矿、水赤铁矿和其他氢氧化物等物质)和豆状、肾状等胶状构造.2)矿石有害杂质含量很低-矿石中P、S、Cu、Pb、Zn、Sn、As、SiO_2等有害杂质含量很低是与变质铁矿原生矿和使贫矿变富的风化作用产物
Iron-bearing quartzite The weathered crust-rich iron ore is characterized by its high iron content (50-70%) and extremely large scale (up to billions of tons). From the point of view of ore structure and material composition, Has the following distinguishing features from other types of iron ores: 1) The ore has a loose porous structure with a powdery structure (reflecting that more quartz, etc. leached and dissolved away from the iron-bearing quartzite than hematite, Goethite, water hematite and other hydroxides) and bean-shaped, kidney-shaped gel-like structures.2) The content of harmful impurities in ore is very low - the content of P, S, Cu, Pb, Zn, Sn, As, SiO 2 and other harmful impurities is very low and the metamorphic iron ore primary ore and enrich the weaker ore weathering products