hardness of navada iron ore

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How Steel Is Made | Metal SupermarketsJun 05, 2015· The History of Iron. Iron is the fourth most abundant element, making up more than 5% of the earth's crust. The production of iron by humans started in around 2000 BC in south-west or south-central Asia. This marked the beginning of the Iron Age which saw the widespread replacement of bronze with iron for tools and weapons.hardness iron ore - ottema-verhuurWhat is the hardness of iron ore - Answers. For More Details Plz Visit at: steelmkts (Like, Ms Ingot, Scrap, Sponge Iron, Pig Iron, TMT, Rebars, Iron Ore, Wire Rod, Angle, Channle, Girder, HR/CR Coils,... Chat Online. Lead - Rocks and Minerals. The hardness is about 6 and the specific gravity between 2.5 - 2.8. ... It is used as an ore of zinc and manganese. ... It is an ore of iron ...

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