Thermodynamic Computation and Analysis for the Carbothermic Reduction of TiO ₂

Abstract

Thermodynamic Computation and analysis were carried out both TiO 2 -C-Ar and TiO 2 -C-N 2 systems using the Factsage thermodynamic software. The results show that TiO 2 was deoxidated step by step as follows: TiO 2 ĺ7L 20 O 39 ĺ7L 10 O 19 ĺ7L n O 2n-1 ĺ7L 3 O 5 ĺ7L17L&. TiC come into being at 1343.2 and 4.8wt%C. TiC coexists with C up to 31.2wt% in TiO 2 -C-Ar systems. TiN come into being at 1148.9 and 4.8wt%C in TiO 2 -C-N 2 systems. The solid solution Ti (C, N) formed with TiN and TiC at 1566.8 and C is within 23.1wt% < C < 31.2wt%. TiN die away when C > 31.2wt%. The stationary phase are TiC coexistence with residual C at high temperature and C enough zone. The simulated computaion methods are feasibly verified by the XRD detected phase composition for the actual blast furnace slag using schreyerite ironmaking.