The Fe-TiN composite is
synthesized in-situ using a non-transferred arc D.C. plasma reactor from
ilmenite ore concentrate using methane and nitrogen as the reactive gases.
The alloy composition was selected based on the thermodynamics assessment.
The standard Gibbs energy minimization method is used to calculate the
equilibrium composition of the reacting species.
The plasma reactor system consists of reaction chamber, quenching cylinder
and filter cylinder. The reactor is heated with PT-50C plasma torch (PEC)
having a maximum power of 100 kW. All the parameters will be monitored
with a computer data acquisition system. The products will be
characterized with SEM, EDAX, and X-ray diffraction. Process parameters
are evaluated to improve the efficiency.
A mathematical model is developed to describe the plasma gas and particle
dynamics and conversion yields. The velocity and temperature fields in the
plasma are calculated by solving the Navier-Stokes equations and the
thermal energy balance equations. Conservation equations for the system
species consider the multi-component diffusion and chemical reactions.
Through the application of this model, temperature distribution, flow
fields, and production rates are computed. The model will be used to study
the thermal decomposition of ilmenite in the non-transferred arc plasma