(1-3)Studies on Pyrrhotite Roasting.II-IV.

Magnetic diffusion anomaly at the Néel temperature of pyrrhotite, Fe(1-x)S.

Cation diffusion is an important rate-limiting process in the growth of pyrrhotite (Fe1-xS) in passivating films on steels exposed to sulfidic environments, and for proposed synthetic applications of Fe1-xS, for example single-phase magnetic switching devices. Above the Néel temperature TN of 315 °C, where Fe1-xS is paramagnetic and structurally disordered, iron self-diffusivity *DFe predictabl...

Microstructure of a Pyrrhotite-pentlandite Intergrowth in Ll6 Saint-séverin

The Effect of Conditioning on the Flotation of Pyrrhotite in the Presence of Chlorite

The influence of conditioning on the flotation of pyrrhotite in the presence of chlorite was investigated through flotation tests, sedimentation tests, and X-ray photoelectron spectroscopy (XPS) analysis. The flotation results show that chlorite slimes dramatically impair the flotation of pyrrhotite. Sedimentation and flotation tests reveal that conditioning can effectively remove chlorite slim...

Natural Pyrrhotite as a Catalyst in Prebiotic Chemical Evolution

The idea of an autotrophic organism as the first living being on Earth leads to the hypothesis of a protometabolic, complex chemical system. In one of the main hypotheses, the first metabolic systems emerged from the interaction between sulfide minerals and/or soluble iron-sulfide complexes and fluids rich in inorganic precursors, which are reduced and derived from crustal or mantle activity. W...

Comparison of Different Pyrrhotite Depressants in Pentlandite Flotation

Nickel producers have been using a number of different strategies, sometimes in combination, to reject pyrrhotite. These include raising the pH of flotation to partially suppress pyrrhotite floatability (73), introducing separate pyrrhotite rejection circuits which by and large also exploit the fact that pyrrhotite floats poorly in alkaline solutions, and using magnetic separation to remove pyr...