Reversible reactions between pyrite and pyrrhotite in SO sub 2

Journal Article · Mon Apr 01 04:00:00 EST 1991 · JOM (Journal of the Minerals, Metals and Materials Society); (United States)

DOI:https://doi.org/10.1007/BF03220544· OSTI ID:5467712

Hausen, D M ^[1]

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1. Newmount Mining Co. (US)

Differential thermal analysis (DTA) of iron sulfides in inert atmospheres containing varying amounts of SO{sub 2} indicates temperature-dependent reversible reactions between pyrite and pyrrhotite in the range from 350{degrees} C to 520{degrees} C. Hexagonal pyrrhotite (troilite) and sulfur dioxide interact above 350{degrees} C to form pyrite and magnetite. Pyrite decomposes endothermically to pyrrhotite and sulfur above 520{degrees} C in the same atmosphere. The sulfurization of hexagonal pyrrhotite to pyrite has been investigated kinetically by DTA and confirmed by x-ray diffraction and wet chemical analyses. This paper reports on reversibility of this pyrrhotite-pyrite reaction in a sulfur dioxide atmosphere.

• OSTI ID: 5467712
• Journal Information: JOM (Journal of the Minerals, Metals and Materials Society); (United States), Journal Name: JOM (Journal of the Minerals, Metals and Materials Society); (United States) Vol. 43:4; ISSN JOMME
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DIFFERENTIAL THERMAL ANALYSIS
IRON COMPOUNDS
IRON SULFIDES
KINETICS
MINERALS
OXIDES
OXYGEN COMPOUNDS
PYRITE
PYRRHOTITE
REACTION KINETICS
SULFIDATION
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS