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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 828 pages |
| ISBN: | 978-0-9879917-0-6 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Dissolution Mechanism Of Indium In Molten Ca0 - Si02 - Al203 Slag
KyuYeol Ko1; Joohyun Park1;1UNIVERSITY OF ULSAN, Ulsan, Korea, South;
Type of Paper: Regular
Id Paper: 85
Topic: 4
Abstract:
The solubility of indium in molten CaO-SiO2-Al2O3 system was measured at 1773 K in order to establish the dissolution mechanism of indium under highly reducing atmosphere. The solubility of indium increases with increasing oxygen potential, whereas it decreases with increasing the activity of basic oxide. The relationship between the indium capacity and sulfide capacity shows a good correlation in consistent with the theoretical expectation. The enthalpy change of indium dissolution reaction is negative, indicating that the dissolution is an exothermic reaction. The heat of dissolution into the high silica melts is greater than that into the low silica melts. The solubility of indium is strongly dependent on the content of silica. The activity coefficient, and thus the excess free energy of In2O linearly decreases with increasing silica content, indicating that the In2O is believed to behave as a weak basic oxide in the present CaO-SiO2-Al2O3 ternary system under reducing conditions.