Mineralogical and magnetic characterization of Olmec ilmenite …
This study focuses on the sourcing of non-local artifacts, made from iron–titanium (ilmenite) oxide mineral and iron-ores, found in large quantities in the archeological excavations, in order to shed light on Early Preclassic trade.
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Reflectance spectroscopy of ilmenites and related Ti and Ti
Ilmenite differs most from silicates in the region below ~500 nm: it shows a reflectance increase versus decrease toward shorter wavelengths for silicates, as well as diagnostic Ti/Ti-Fe maxima or minima. Thus, detection of ilmenite in mixtures is best accomplished by including the UV region in spectral analysis.
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Ilmenite Concentrate Properties and Processing Methods
21.17. Results of x-ray phase analysis of this concentrate revealed that the main phase is ilmenite (FeO∙TiO 2 ). The presence of phases Fe 2 O 3 ∙3TiO 2 (much) and 3Fe 2 O 3 ∙3TiO 2 (little) and the absence of magnetic susceptibility of these specimens point to the alteration capacity (leucoxenization) of ilmenite.
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Chemical and mineralogical composition of ilmenite
The various properties of ilmenite such as high density, paramagnetism and electrical conductivity have enabled the gravity separation, high-intensity magnetic separation (HIMS), electrostatic separation or a combination of all three to be conventional methods for processing of ilmenite ores.
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The Magnetic Properties of Ilmenite-Haematite Crystals
apparent that the haemo-ilmenite crystals contain two magnetic components, a. relatively soft component with a coercive force of about 100 Oe and a hard com- ponent with a coercive force of about 1400 Oe. The separated inferred curves for. these two components have been sketched in dotted and dashed lines in figure 4.
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Mathematical Model of Ilmenite Separation Efficiency …
ilmenite is also mixed with impurities, it must be separated to obtain the high grade ilmenite. At present, the main separation methods include flotation [3,4], gravity [5], magnetic separation [6,7], and so on. For example, decanoic acid was found to be an effective collector, to float ilmenite in the strongly acidic pulp. The combination of ...
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A genetic relationship between magnesian ilmenite and …
Based on ilmenite macrocryst compositional distributions, the study of heterogeneity in polygranular ilmenite nodules, and ilmenite in sheared xenoliths, we propose a three stage formation and (re-)crystallization history of ilmenite macrocrysts and megacrysts: 1) primitive asthenospheric melt; 2) lithospheric contaminated melt and 3) re ...
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Frontiers | Experimental Research on Electrical Conductivity …
Electrical conductivities of the olivine–ilmenite systems with various contents of ilmenite (VIlm = 4, 7, 10, 11 and 15 vol%) and pure ilmenite aggregates were measured using a complex impedance spectroscopic technique at 1.0–3.0 GPa and 773–1273 K. Electrical conductivities of the olivine–ilmenite systems increased with increasing ...
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Magnetic ordering in the ilmenite‐hematite solid solution: A
Magnetic ordering in the ilmenite‐hematite solid solution: A computational study of the low‐temperature spin glass region - Harrison - 2009 - Geochemistry, Geophysics, Geosystems - Wiley Online Library.
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Magnetite-rutile symplectite in ilmenite records magma …
Three-dimensional morphologies of magnetite - rutile symplectite in ilmenite. ( a) Typical occurrence of rutile, magnetite, and hematite in ilmenite. ( b) Dendritic rutile and isolated rutile grains, note that the dendritic rutile is interconnected. ( c) Magnetite surrounding large dendritic rutile grain.
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