Process for increasing the selectivity of mineral flotation
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United States of America Patent
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Apr 5, 1988
Grant Date -
N/A
app pub date -
Apr 22, 1987
filing date -
Apr 22, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An aqueous solution containing a water soluble polyvalent metal sulphate, an alkali metal silicate and an alkali metal metabisulphite is described which is added to a slurry of a copper mineral bearing ore to be subjected to a froth flotation step for obtaining a copper concentrate. The aqueous solution is added to enhance the selectivity of conventional flotation collectors and depressants when the valuable minerals are finally disseminated in the host ore, which is then required to be ground to very small particle sizes to achieve the desired liberation. Other valuable minerals such as those bearing zinc and lead, may be recovered from the tailing.
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