Depression of copper and iron sulfides in molybdenite flotation circuits
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United States of America Patent
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Jul 21, 2020
Grant Date -
Feb 2, 2017
app pub date -
Apr 9, 2015
filing date -
Apr 11, 2014
priority date (Note) -
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Abstract
A method of depressing copper sulfides and iron sulfides in a molybdenite flotation recovery process that uses alkaline or alkaline earth polysulfides. The method of enriching molybdenite content from a slurry having molybdenite and at least one of iron sulfides and copper sulfides can include the steps of adding an effective amount of a depressing reagent selected from one or more alkaline polysulfides, alkaline earth polysulfides, or a mixture thereof, to the slurry, wherein the pH of the slurry is greater than about 8.0; and passing a gas through the slurry to separate material by selective flotation, and recovering the molybdenite from a froth.
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