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N ‐arylhydroxamic acids as mineral collectors for ore‐beneficiation
Author(s) -
Natarajan Ramanathan,
Nirdosh Inderjit
Publication year - 2001
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450790612
Subject(s) - beneficiation , pyrite , mineral , chemistry , zinc , copper , iron ore , alkyl , tonne , mineral processing , metallurgy , mineralogy , materials science , organic chemistry
Several arylhydroxamic acids were synthesized, characterized and tested as collectors in the flotation of a Cu‐Zn sulphide ore. Arylhydroxamic acids floated copper in preference to iron and zinc minerals. Substitution in the N ‐phenyl ring increased the efficiency of the collector. However, increase in alkyl‐chain beyond C 6 in the acyl group decreased the flotation efficiency of the collector. N ‐butanoylphenylhydroxylamine was found to give the best result and floated about 93 wt% of Cu in about 32 wt% of the feed taken and the collector usage was only about 70 g per tonne of the ore. Pyrite flotation was minimum at pH 11.