Solubility of alumina in cryolite melts: Measurements and modeling at 1300 K

From: Metallurgical and Materials Transactions | Date: April 1, 2003| Author: Rapp, Robert A; Wu, Xiaoxia; Zhang, Yunshu | Copyright information

The solubility of alumina was measured experimentally in neutral and basic cryolite melts with a composition range of 3 <= cryolite ratio r <=12.5 (r = mol NaF/mol A1F^sub 3^). Thermodynamic activity probes for Al and Na were developed and used to monitor the melt basicity (log a^sub NaF^) and acidity (log a^sub AIF^sub 3^^) for the solubility measurements. The alumina solubility in cryolite melts was modeled thermodynamically in terms of three oxyfluoride solutes over the wide composit...

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