why is magnetite a magnetic ore of iron

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Magnetite - Wikipedia

OverviewApplicationsPropertiesDistribution of depositsBiological occurrencesGallery of magnetite mineral specimensSee alsoFurther readingDue to its high iron content, magnetite has long been a major iron ore. It is reduced in blast furnaces to pig iron or sponge iron for conversion to steel. Audio recording using magnetic acetate tape was developed in the 1930s. The German magnetophon utilized magnetite powder as the recording medium. Following World War II, 3MCompany continued work on the German design. In 1946, the 3M researchers found they could improve the magnetite-based tape…Wikipedia · CC-BY-SA 许可下的文字

Magnetite & Lodestone | Mineral Photos, Uses, Properties

SignificancePropertiesGeologyUseProductionOther usesFormationScopeMagnetite is a very common iron oxide (Fe3O4) mineral that is found in igneous, metamorphic, and sedimentary rocks. It is the most commonly mined ore of iron. It is also the mineral with the highest iron content (72.4%).Chemical Classification: Oxide

Magnetite Ore, Magnetite Iron Ore, Iron Ore Mining Process

It is commonly formed by the reduction of hematite and ferric hydroxide minerals in these rocks. Banded Precambrian iron formations commonly contain magnetite ore. Magnetite is characteristically recognised by its strong magnetism, colour and streak. It is commonly used in magnetic separation and coal washing. However, it is not limited to these purposes, as its abundance and magnetic properties …

Magnetite - an overview | ScienceDirect Topics

Magnetite. Magnetite is the main iron mineral recovered using crushing and grinding, followed by magnetic separation and in some instances flotation to produce a magnetite concentrate. From: Iron Ore, 2015. Related terms: Nanoparticles; Iron Oxide Nanoparticle; Oxide; Ion; Adsorption; pH Value; Magnetic Nanoparticle