Recovery of petalite from ores containing feldspar minerals
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United States of America Patent
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Oct 31, 2000
Grant Date -
N/A
app pub date -
Jul 12, 1999
filing date -
Jul 12, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for recovering petalite from a mixture comprising petalite and feldspar minerals comprises the steps of forming an aqueous slurry of the mixture and adding to the slurry a depressant selected from the group consisting of alkaline earth metal chlorides, alkali metal chlorides, and mixtures thereof. Next, a collector comprising a quaternary ammonium salt is added to the slurry. The slurry is then subjected to a froth flotation process and petalite that is substantially free of feldspar minerals is selectively recovered from the flotation process.
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