Fluidized-Bed Chlorination Rates of Kenya Rutile Ore

作者：Niu Liping^*; Zhang Tingan; Ni Peiyuan; Wang Wenbo; Lu Guozhi; Zhou Aiping

来源：Rare Metal Materials and Engineering, 2014, 43(6): 1377-1380.

• natural rutile
• gas-solid reaction
• fluidized bed
• carbochlorination
• particle

The thermodynamics and kinetics of natural rutile carbochlorination have been investigated in a fluidized-bed. Thermodynamic analysis of this system reveals that when C is excess in the solid phase, TiCl4 and CO are the only two stable products in the chemical equilibrium compositions system, and the increase of the ratio of C to TiO2 has little effect on the product composition. At high temperature, the reaction with CO as the product is the dominant reaction. This paper proposed a reaction rate model, and got a rutile chlorination rate formula, which is more consistent with experimental data. For the TiO2-C-Cl-2 system, the reaction rate is dependent on both size and density of natural rutile. From 900 to 1000 degrees C, the apparent activation energy is 10.569 kJ/mol. In this temperature range, mass diffusion is the main reaction controlling step. The expression of the chlorine reaction rate in the.-C-Cl-2 system was obtained, and it depends on the degree of reaction, Cl-2 concentration and the size of coke.

• 出版日期2014-6
• 单位东北大学