Tuesday, December 28, 2010 10:53:41 AM
"Hematite oreHematite iron ore deposits are currently exploited on all continents, with the largest intensity in South America, Australia and Asia. Most large hematite iron ore deposits are sourced from altered banded iron formations and rarely igneous accumulations.
Hematite iron is typically rarer than magnetite bearing BIF or other rocks which form its main source or protolith rock, but it is considerably cheaper to process as it generally does not require beneficiation due to its higher iron content. However, Hematite ores are harder than magnetite ores and therefore require considerably more energy to crush and grind if benefication is required. Hematite ores can also contain significantly higher concentrations of penalty elements, typically being higher in phosphorus, water content (especially pisolite sedimentary accumulations) and aluminium (clays within pisolites). Export grade Hematite ores are generally in the 62–64% Fe range"
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