Fluidized-bed chlorination rates of Kenya rutile ore
2014 (English)In: Xiyou jinshu cailiao yu gongcheng, ISSN 1002-185X, Vol. 43, no 6, 1377-1380 p.Article in journal (Refereed) Published
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-Cl2 system, the reaction rate is dependent on both size and density of natural rutile. From 900 to 1000°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-Cl2 system was obtained, and it depends on the degree of reaction, Cl2 concentration and the size of coke.
Place, publisher, year, edition, pages
2014. Vol. 43, no 6, 1377-1380 p.
Carbochlorination, Fluidized bed, Gas-solid reaction, Natural rutile, Particle
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-148581ISI: 000338483700021ScopusID: 2-s2.0-84904195841OAI: oai:DiVA.org:kth-148581DiVA: diva2:736723
QC 201408082014-08-082014-08-082014-08-08Bibliographically approved