Abstract
Conditions of the gas-phase reactions of reducing titanium tetrachloride to metal with aluminum subchloride are investigated in the approximation of equilibrium thermodynamics. It is established that the reduction process has a threshold character by three parameters: temperature, the amount of subchloride, and the radius of the metallic surface. Above the threshold values that were found, these parameters, along with the amount of inert gas in the gas mixture, unambiguously determine the yield of titanium and its aluminide. The conditions for obtaining aluminum-free titanium are determined. A comparative analysis of the advantages and disadvantages of subchloride and vapor-phase metallothermic methods of reducing titanium is carried out.
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