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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 630 pages |
| ISBN: | 978-0-9879917-2-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
The Application Of Mixed Molten Salts NaCl-CaCl2, KCl-NaCl And KCl-NaCl-CaCl2 In The FFC Cambridge Process
Cai Zhuofei1; Guo Zhancheng1; Tang Huiqing1; Zhang Zhimei1;1KEY LABORATORY OF ECOLOGICAL AND RECYCLE METALLURG, Beijing, China;
Type of Paper: Regular
Id Paper: 71
Topic: 6
Abstract:
The mixed molten salts NaCl-CaCl2, KCl-NaCl and KCl-NaCl-CaCl2 were introduced into the direct electrolysis reduction of solid TiO2 to the solid metal Ti (FCC process). Related physical properties of thephysical property physical property physical property three mixed molten salts were studied in this paper. The mixed molten salts have significant advantage over original molten salt CaCl2 (low melting point, high conductivity). The low electrolysis reduction temperature could decrease the energy consumption of heating equipments and the high conductivity could decrease the energy consumption of the molten salts’ resistance. Mixed molten salts with different ratios should be an effective way to reduce the secondary reactions caused by intermediate Ca because the rate of intermediate Ca producing was determined by the Ca2+ ion concentration in the molten salts. The results showed that the current efficiency (CE) increased and the total energy consumption (TEC) decreased due to the change of molten salts as expected. Current efficiency of 52.2% in CaCl2-NaCl (mole ratio=52:48, 873K), 65.9% in KCl-NaCl (mole ratio=50:50, 973K) and 59.5% in KCl-NaCl- CaCl2 (mole ratio= 42.5:42.5:15, 973K) were obtained in this work.