Process for upgrading waste powders from mines, containing iron oxides
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United States of America Patent
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Nov 9, 2021
Grant Date -
Sep 15, 2016
app pub date -
Oct 16, 2014
filing date -
Oct 17, 2013
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Abstract
A process for upgrading waste powders of the mining industry containing iron oxides is described, which includes preparing a mixture containing powder based on iron oxides, an aqueous dispersion of a thermosetting resin and optionally carbon powder, and a catalyst of acidic nature; kneading the mixture at a temperature between 5 and 100° C. to form a homogeneous paste, and granulating such homogeneous paste at a temperature between 100 and 300° C., thus obtaining granules of powder based on iron oxides and optionally carbon powder bound by the resin that has been polymerized.
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