| 摘要 |
The invention concerns the use of 5-hydroxy-3-thiazolidine-2-thiones of the structure I <IMAGE> I where R1=(CHOH)m, R2=(CHOH)n where (m+n)=0 to 6, and R3 is alkyl or hydroxy-alkyl as depressants in the flotation of mixtures of base metal minerals, particularly those containing molybdenum, copper, lead, zinc; and to flotation processes using these compounds.
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