SUMMARY Ferrimagnetic, monoclinic 4C pyrrhotite (Fe7S8) is the only iron sulphide with high relevance for palaeomagnetism and rock magnetism that can be identified in materials by its characteristic low-temperature anomaly. Despite natural many magnetic studies over last decades, physics crystallography behind this anomaly, also denoted Besnus transition, a matter of debate. In study, we analys...

The relationship between the grinding characteristics of polymetallic complex ore and its component minerals, pyrrhotite, sphalerite, quartz, under action abrasion was studied, based on batch experiments theoretical analysis methods selective grinding. results show that when subjected to abrasion, crushing effect enhanced by existence is, sphalerite plays a positive role in ore. reduced pyrrhot...

Iron ore concentrate sales in a mineral processing plant appeared a trend of high sulfur, exceeding the sales requirement of 0.3% significantly. To this end, for the sulfide in iron concentrate mainly exists in the form of pyrrhotite, companies with iron minerals and has a high degree of oxidation, we can add flotation agent to the magnetic separation column, and at the same time fill gas for s...

The microbiological leaching of a sulfide ore sample was investigated in shake flask experiments. The ore sample contained pyrite, pyrrhotite, pentlandite, sphalerite, and chalcopyrite as the main sulfide minerals. The tests were performed at eight different temperatures in the range of 4 to 37 degrees C. The primary data were used for rate constant calculations, based on kinetic equations unde...

Exfoliation along vacancy planes enables novel 2D materials with versatile morphological and compositional variability.