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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, 1377-1380 p.Article 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, 1377-1380 p.
Keyword [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: diva2:736723
Note

QC 20140808

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

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