CLAY FLOTATION OF TAILINGS
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United States of America Patent
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Issued Date -
Oct 27, 2016
app pub date -
Nov 17, 2015
filing date -
Apr 24, 2015
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Abstract
A process for treating and dewatering tailings comprising fine clay minerals, fine silt minerals and water is provided, comprising treating the tailings with a sufficient amount of a clay surface reagent to selectively modify the surface properties of the fine clay minerals; subjecting the treated tailings to froth flotation to float a portion of the fine clay minerals and form a clay froth layer and froth flotation tails having a reduced fine clay minerals content; and recovering the clay froth layer and subjecting it to dewatering.
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