Effect of sodium oleate on inhibiting pyrite oxidation

The oxidation and acid production behavior of both ore and coal pyrites with and without a hydrophobic surface coating of sodium oleate was investigated. The results showed that pyrite surface was passivated by sodium oleate coating, which substantially reduced or even eliminated moist air oxidation...

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Bibliographic Details
Published in:International journal of mineral processing 2000-02, Vol.58 (1), p.305-318
Main Authors: Jiang, C.L, Wang, X.H, Parekh, B.K
Format: Article
Language:English
Subjects:
acid formation
Applied sciences
Exact sciences and technology
Flotation. Enrichment. Beneficiation
hydrophobic coating
Metals. Metallurgy
Ores
oxidation
Production of metals
pyrite
sodium oleate
surface coating
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Summary:The oxidation and acid production behavior of both ore and coal pyrites with and without a hydrophobic surface coating of sodium oleate was investigated. The results showed that pyrite surface was passivated by sodium oleate coating, which substantially reduced or even eliminated moist air oxidation. Without the hydrophobic surface coating, coal pyrite displayed higher oxidation and acid production rate than ore pyrite. It was also found that the acid production by pyrite in aqueous solution obeys a zeroth order dissolution reaction with respect to hydrogen ions. The nature of the surface coating was characterized by electrochemical, contact angle and zeta potential measurements.
ISSN:0301-7516
1879-3525
DOI:10.1016/S0301-7516(99)00045-9