2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 9: Molten Salts and Ionic Liquids, Energy Production
| Editors: | Kongoli F, Gaune-Escard M, Turna T, Mauntz M, Dodds H.L. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 390 pages |
| ISBN: | 978-1-987820-24-9 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Carbochlorination of Modified Titanium-bearing Blast Furnace Slag in Molten Salts
Fu Nianxin1;1NORTHEASTERN UNIVERSITY, Shenyang, China;
Type of Paper: Regular
Id Paper: 55
Topic: 13
Abstract:
A carbochlorination process of the modified titanium-bearing blast furnace slag in molten salts was proposed. Mixtures consisting of the slag and petrocoke were chlorinated using chlorine-nitrogen gases. Thermodynamic analysis of the reaction system showed that the main oxide components follow a thermodynamic chlorination ability order of CaO> MnO> FeO> MgO> TiO2> Al2O3> SiO2 at 976-1300 K. Effects of the composition of initial molten salts, reaction temperature, chlorine partial pressure and carbon content on the chlorination extent were examined. The proportion of potassium chloride and sodium chloride in a wide range of 1:1 to 1:5 had an insignificant effect on the chlorination extent. The chlorination extent increased by raising the temperature, chlorine partial pressure and carbon content, respectively. A high chlorination extent of 92.6% was attained with the carbon content of 12% and chlorine partial pressure of 60 kPa after 90 min of reaction at 800¡æ, which was verified in mineral phases by XRD. Variations of the concentration of main chlorides in the molten salts and their viscosity and surface tension with their use cycles were discussed.