Depressant for flotation separation of polymetallic sulphidic ores
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United States of America Patent
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Sep 17, 1991
Issued Date -
N/A
app pub date -
Jan 3, 1989
filing date -
May 2, 1988
priority date (Note) -
Expired
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Abstract
A new depressant for use in enhanced separation of polymetallic sulphides is described. The depressant agent is used in conjunction with conventional collector agents and forthing agents in the flotation separation of copper, nickel, lead, zinc sulphides by depressing iron sulphides such as pyrrhotite, pyrite and marcasite in the tailing. The depressant consists of a cross-linked starch chemically combined with a polyacrylate and sugar free lignin sulphonate.
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