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Fluidized-bed chlorination rates of Kenya rutile ore
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Process Metallurgy.
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2014 (English)In: Xiyou jinshu cailiao yu gongcheng, ISSN 1002-185X, Vol. 43, no 6, p. 1377-1380Article in journal (Refereed) Published
Abstract [en]

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, p. 1377-1380
Keywords [en]
Carbochlorination, Fluidized bed, Gas-solid reaction, Natural rutile, Particle
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-148581ISI: 000338483700021Scopus ID: 2-s2.0-84904195841OAI: oai:DiVA.org:kth-148581DiVA, id: diva2:736723
Note

QC 20140808

Available from: 2014-08-08 Created: 2014-08-08 Last updated: 2017-12-05Bibliographically approved

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