Results 11 to 20 of about 151 (127)
Transactions of Nonferrous Metals Society of China, 2022 The sulfide passivation film produced on the surface seriously prevents further reaction in the process of using monoclinic pyrrhotite (MPr) to treat heavy metal ions in wastewater. Ultrasonic technology was introduced to assist MPr to recover the copper ions. XPS result proves that CuS products exist on the surface of MPr.
Tong Yue
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Hysteresis properties of sized dispersed monoclinic pyrrhotite grains
Geophysical Research Letters, 1984 Monoclinic pyrrhotite (Fe7S8 with 4C superstructure) was magnetically separated from a massive pyrrhotitic ore for preparation of nine grain‐size fractions ranging from ∼ 80 µm (large multidomain grains) to < 3 µm (single‐domain grains). Grains smaller than 100 µm were found to be magnetically hard with coercive forces ranging from 135 oe for 83 µ ...
exaly +2 more sources
Magnetic characterization of non-ideal single-domain monoclinic pyrrhotite and its demagnetization under hydrostatic pressure up to 2 GPa with implications for impact demagnetization [PDF]
Physics of the Earth and Planetary Interiors, 2016 © 2016 Elsevier B.V..Here we present a comprehensive magnetic characterization of synthesized non-ideal single-domain (SD) monoclinic pyrrhotite (Fe7S8). The samples were in the form of a powder and a powder dispersed in epoxy. "Non-ideal" refers to a powder fraction of predominantly SD size with a minor contribution of small pseudo-single-domain ...
Natalia Bezaeva +2 more
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Effects of Galvanic Interaction between Chalcopyrite and Monoclinic Pyrrhotite on Their Flotation Separation [PDF]
Minerals, 2021 The galvanic interaction between chalcopyrite and monoclinic pyrrhotite and its effect on flotation separation were studied using monomineral flotation tests, adsorption capacity tests, X-ray photoelectron spectroscopy (XPS) characterization, and scanning electron microscopy (SEM) test.
Liu Yang +5 more
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Study on the Structure and Catalytic Performance of Catalyst Fe7S8 for Direct Coal Liquefaction
Taiyuan Ligong Daxue xuebao, 2021 In order to study the relationship between the direct coal liquefaction performance and the structure of Fe7S8 catalysts prepared by different methods, Fe7S8 catalysts with different crystal structures were prepared by calcination and solvothermal method
Xueming WANG, Xiaohong LI, Ruoqing WANG
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Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2022 The paper presents the results of studies of ferromagnetic minerals and their distribution in the Tarkhanian and transition Tarkhanian-Chokrakian deposits of the Kop-Takyl section (Kerch Peninsula, Eastern Paratethys).
Пилипенко О.В. +2 more
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High-temperature thermomagnetic properties of vivianite nodules, Lake El'gygytgyn, Northeast Russia [PDF]
Climate of the Past, 2013 Vivianite, a hydrated iron phosphate, is abundant in sediments of Lake El'gygytgyn, located in the Anadyr Mountains of central Chukotka, northeastern Russia (67°30′ N, 172°05′ E).
P. S. Minyuk +3 more
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Rock magnetic investigations constraining relative timing for gold deposits in Finland [PDF]
Bulletin of the Geological Society of Finland, 2011 Palaeomagnetic and anisotropy of magnetic susceptibility (AMS) studies were carried out on a orogenic gold deposit in Jokisivu, located in the western part of the Pirkanmaa Belt in the Svecofennian domain of southern Finland.
S. Mertanen, F. Karell
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Journal of Physics: Condensed Matter, 2021 Abstract Iron mono-sulphides, or pyrrhotites, are minerals present in the Earth’s crust and mantle as well as major magnetic constituents of several classes of meteorites, thus are of interest to a wide range of disciplines including geology, geophysics, geochemistry, and material science.
Aleksandar Živković +3 more
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Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2019 In order to obtain the missing data on the magnetostratigraphy of transitional layers between Sarmatian and the Maeotian parts in the Eastern Paratethys, the authors studied the Upper Sarmatian ― the Lower Maeotian deposits in the Panagia Cape section ...
Pilipenko O.V. +4 more
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