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

K. L. Zanaveskin, Senior Researcher, e-mail: zakon82@mail.ru

L. Ya. Karpov Scientific-Research Physical and Chemical Institute, Obninsk, Russia:
A. N. Maslennikov, Junior Researcher
S. M. Zanaveskina, Senior Researcher

JSC “YaregaRuda”, Ukhta, Russia:
V. I. Vlasenko, Chief Executive Officer

We investigated the reaction ability during chlorination of rutile concentrate, titanium slag and new types of titanium-bearing raw materials — quarzleucoxene concentrate and autoclave concentrate. Experiments were carried out in fluidized bed reactor at the temperature of 750 ^oC with fivefold molar excess of carbon. Chlorination of titanium concentrates in fluidized bed reactor is carried out with gaseous reagents. That's why, the reaction ability of raw materials is firstly defined by TiO₂ surface, available for interaction. Velocity of TiO₂ chlorination is higher in porous grains of titanium concentrates, having developed surface. The structure of raw material grains is another factor, influencing on chlorination velocity. Crystal sizes of titanium dioxide, sizes of pores, qualitative and quantitative compositions of impurities define the velocity of diffusion of gaseous reagents into the grain. The higher it is, the bigger depth is found by gaseous reagents, and the bigger part of TiO₂ surface takes part in chlorination, and the higher is the reaction ability of titanium raw materials. The carried out investigations showed that the reaction ability of investigated samples of raw materials is decreased in the range: autoclave concentrate > titanium slag > rutile concentrate > quartz-leucoxene concentrate.
This investigation was carried out with the Grant of the Russian Scientific Fund (project No.15-13-00171).

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