A. V. Topchiev Institute of Petrochemical Synthesis, RAS (Russia):

Zanaveskin K. L., Ph. D. in Chemistry, Senior Researcher, zakon82@mail.ru

Zanaveskin L. N., Ph. D. in Chemistry, Chief of Sector, zanaveskin@ips.ac.ru

Karpov Institute of Physical Chemistry (Russia):

Maslennikov A. N., Junior Researcher, anmaslennikoff@gmail.com

Makhin M. N., Ph. D. in Chemistry, Senior Researcher, makhin.maxim@gmail.com

The results of the studies on the Yaregskoye deposit quartz-leucoxene rougher concentrate representative sample are presented, this titanium deposit being the largest in Russia. The concentrates samples preparation for mineralogical analysis included the concentrate classification into size fractions and separation of ore minerals through division of the concentrate narrow size-fractions in bromoform. The obtained samples were studied by the AES, ICP-OES, XRS, SEM and EDX methods. The main minerals in concentrate are rutile, anatase, quartz, to a lesser degree altered alumosilicates. Over 90 % of TiO₂ in concentrate is contained in individual grains of leucoxene, which is a polymineral aggregate based on rutile crystals lattice with acicular shape, forming sagenitic lattice. Other components of leucoxene grains are fine grains of quartz and grains of alumosilicate, uniformly distributed in leucoxene particles volume in voids of sagenitic lattice. Leucoxene grains bind more than half of SiO₂ quantity, contained in concentrate. In view of the special features of leucoxene mineral structure, rougher concentrate repreparation by mechanical methods is impossible. The ore minerals in concentrate: rutile, anatase, zircon, monazite and xenotime are main carrier minerals of all valuable components in concentrate, expressly, rare elements and rare-earth elements: titanium, niobium, tantalum, vanadium, zirconium and total rare-earth metals of cerium and yttrium groups. The most rational way of the concentrate utilization is development of a new hydrometallurgical technology for its advanced processing.
The studies were performed with the aid of the Russian Science Foundation Grant (Project No. 15-13-00171).

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