Their beneficiation, particularly that of magnetite varieties, yields an entirely economic concentrate with 62–68 percent iron. The quartz is removed from ferruginous quartzites in the crust of weathering, and large de posits of rich hematite martite ores are formed. Most iron ores are used to smelt pig iron, steel, and iron alloys.Send Message Get Price
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Zhengzhou High-tech Zone, China