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Towards prediction of oxidation during grinding I. Galena flotation

Authors
Journal
Minerals Engineering
0892-6875
Publisher
Elsevier
Publication Date
Volume
15
Issue
7
Identifiers
DOI: 10.1016/s0892-6875(02)00062-6
Keywords
  • Galena
  • Grinding
  • Flotation
  • Iron Oxidation Species
  • Hydroxide Ions
Disciplines
  • Chemistry

Abstract

Abstract The degree of oxidation during grinding and its effect on galena flotation were studied using a specialised mill which permitted chemical conditions during grinding to be controlled. It was found that iron oxidation species derived from the grinding medium played a dominant role in galena flotation. The amount of hydroxide consumed to maintain the grinding pH at a constant value depended on the production of iron oxidation species. Linear relationships were obtained between the amount of hydroxide consumed to maintain a constant grinding pH and the production of iron oxidation species as well as galena recovery. These relationships should eventually permit oxidation during grinding and galena flotation to be predicted.

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