Kinetics of cathodic decomposition of pyrrhotite and chalcopyrite in deoxygenated solutions

X. Cheng, X. Li, I. Iwasaki, Karl A Smith

Research output: Contribution to journalArticlepeer-review

Abstract

A cathodic decomposition model was examined for both pyrrhotite and chalcopyrite in an attempt to analyze the formation of surface coatings in deoxygenated solutions at natural, near neutral pH. Combination potentials established between the mineral-grinding media pair were simulated by applying a potential of -0.455 V (vs. a standard hydrogen electrode) either to a pyrrhotite or to a chalcopyrite electrode. Chronoamperometry was used to study the polarization behaviors and alteration of mineral surfaces through cathodic processes. The kinetic parameters of cathodic decomposition of pyrrhotite and chalcopyrite were determined and compared. It was concluded that pyrrhotite decomposed faster than chalcopyrite in near-neutral pH solutions. Both minerals were then covered by a film consisting mainly of iron hydroxides, which adversely affected their flotation.

Original languageEnglish (US)
Pages (from-to)17-22
Number of pages6
JournalMinerals and Metallurgical Processing
Volume15
Issue number3
DOIs
StatePublished - Jan 1 1998

Fingerprint

Dive into the research topics of 'Kinetics of cathodic decomposition of pyrrhotite and chalcopyrite in deoxygenated solutions'. Together they form a unique fingerprint.

Cite this