Reducing the need for tailings storage dams in the iron ore industry
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United States of America Patent
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Dec 15, 2020
Grant Date -
Apr 26, 2018
app pub date -
Dec 15, 2017
filing date -
May 11, 2016
priority date (Note) -
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Abstract
THIS invention relates to an integrated process for recovering the valuable iron fraction from low grade iron ore, including the steps of: comminution 14 and classification 36/39 to obtain a classified fraction suitable for coarse flotation and classified fraction suitable for fine beneficiation; subjecting the fraction suitable for coarse flotation to coarse flotation 40 to obtain an intermediate iron concentrate 42 and a coarse sand residue 44; grinding the intermediate concentrate to a size suitable for fine beneficiation; and subjecting the fractions suitable for fine beneficiation to fine beneficiation 46 and obtaining a final iron concentrate 48 and a fine tailings 50.
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