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Simakov V.A.,Fedorovsky All Russia Research Institute of Mineral Resources | Isaev V.E.,Fedorovsky All Russia Research Institute of Mineral Resources
Inorganic Materials

The technique for determining the magnetite iron content in iron ores by X-ray fluorescence after preliminary extraction of magnetic fraction by using a magnetic separator is proposed. Separation of the magnetic and nonmagnetic fractions occurs with sufficient completeness and accuracy at a particle size in the sample in the range of-0.074 to +0.044 mm. At smaller grain size, the quality of separation sharply worsens. Mixing of a weighed sample with nonmagnetic powder before separation provides satisfactory accuracy of recovery of the magnetic fraction even in the case of a very finely powdered sample. Application of an X-ray fluorescence energy dispersion spectrometer makes it possible to perform a qualitative assessment of separation by comparison of spectra of scattered and fluorescent radiation after each separation cycle. © 2015 Pleiades Publishing, Ltd. Source

Bystrov I.G.,Fedorovsky All Russia Research Institute of Mineral Resources | Pirogov B.I.,Fedorovsky All Russia Research Institute of Mineral Resources | Yakushina O.A.,Fedorovsky All Russia Research Institute of Mineral Resources
Geology of Ore Deposits

Ti-bearing iron ore of the Pudozhgorsky deposit has been studied in detail using laboratory mineralogical analytical methods in order to determine the morphostructural and constitutional features of titanomagnetite. The genesis of the ore and gangue mineral intergrowths has been established, as well as typomorphic attributes of three titanomagmetite varieties differing in degree of heterogeneity. The behavior of ore in technological processes is controlled by exsolution structures of titanomagnetite with ilmenite formation. The possibility of the complex development of this ore has been shown. Titanomagnetites of major mineral assemblages pertaining to various types of Tiand V-bearing iron ores are compared. © 2015, Pleiades Publishing, Ltd. Source

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