Concentration process of iron ore slimes
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United States of America Patent
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Sep 27, 2022
Grant Date -
Mar 11, 2021
app pub date -
Oct 3, 2018
filing date -
Oct 6, 2017
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Abstract
The present application relates to a concentration process of iron minerals from ultrafine tailings (slimes) from iron ore processing through reverse flotation with pH between 8.5 and 10.5 with the addition of amide-amine type collector, or further a mixture thereof with traditional cationic collectors (amines), in the absence of any depressant, alternatively including a step of high field magnetic concentration, which allows to obtain a concentrate with iron content higher than 66% and contents of SiO2+Al2O3 below 4%.
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