write two important ore of fe and Ni
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Answer:
Steel is a processed form of pig iron with impurities such as silicon, phosphorus and sulfur removed and with a reduction in the carbon content. Globally, steel's versatility is unsurpassed. Wrought iron (low carbon) and cast iron (pig iron) also have important markets. One of the most ubiquitous products in Australia is corrugated iron, a structural sheet steel shaped into parallel furrows and ridges. It was invented by Henry Robinson Palmer in 1828 in London and quickly became popular for roofing and farm buildings.
Iron metal may be produced from the smelting of certain iron compounds. Their concentration in economic proportions is referred to as 'iron ore'.
Other well known uses of iron compounds are:
Iron sulfate used as fungicide, the oxalate of iron in photographic development, limonite, goethite, hematite as pigments and abrasives, magnetite in the production of industrial electrodes and also for washing coal
Iron chloride and nitrate used as mordents and industrial reagents in the production of several types of inks
Iron carbonyl as a catalyser of many chemical reactions
Micaceous hematite as a protective paint on steel superstructures.
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World production and resources
World resources of crude iron ore are estimated to exceed 800 billion tonnes containing more than 230 billion tonnes of iron. The world's resources are dominated by low-grade ore, though current world production of iron ore is largely by supply from deposits of high-grade ore composed of either rocks of massive hematite or pisolitic goethite.
World iron ore production in 2013 was 2.95 billion tonne, with the major producers being China, Australia, and Brazil. Production in Australia was 530 Mtonne. South Australian total production in 2013 was in the order of 12 Mtonne, including 3.2 Mtonne of magnetite direct shipping ore, and 665,000 tonne of magnetite concentrate.
Ore production in Australia is overwhelmingly from high-grade hematite and pisolitic goethite-limonite deposits, mostly in the Hamersley Basin region of Western Australia. A recent trend has been production of a high-grade magnetite concentrate from beneficiation of low-grade magnetite ore. Resources of this latter material are enormous, in particular in Western Australia, and South Australia, with significant resources also in the Northern Territory, and Queensland.