Iron Ore TypesThere are three main sources for iron that require different mining techniques to achieve extraction. Banded iron formations exist within sedimentary rock, usually accompanied by magnetite and silica. Known as taconite, mines cover large swaths of land in Minnesota, Michigan, eastern Canada and Brazil. The rock is removed and crushed in order to attain the taconite, a process called beneficiation.
In Chile, Malaysia and Tasmania, volcanic rock containing iron ore is plentiful. These deposits are mined in a similar fashion to branded iron formations and crushed to remove the iron. Titanium is a usual byproduct of the volcanic deposits.
Hematite iron ore deposits are more traditional deposits of iron. The separation of the iron ore from its joined elements makes this one of the preferred sources for mining.
Iron Ore Concentration OperationBeneficiation Crusher Sand Ore of iron includes concentration, generally by physical removal of unwanted gangue; also considered beneficiation is the regulation of product size, or other steps such as agglomeration to improve its chemical or physical characteristics prior to processing. Processing of the concentrated product into iron or steel typically involves the use of pyrometallurgical technique.
Iron Ore Concentration Plant CostIron ore concentration plant involves several different techniques, including milling (crushing and grinding); washing; filtration; sorting; sizing; gravity concentration; magnetic separation; flotation; and agglomeration. Milling and magnetic separation are the most common methods used. Flotation is primarily used to upgrade concentrates from magnetic separation by reducing the silica content of the concentrate.
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