THE ACTIVITY OF CAO IN THE CAO-CACL2 AND CAO-CACL2-CAF2 SYSTEMS

Authors
TAGO Y ENDO Y MORITA K TSUKIHASHI F SANO N
Citation
Y. Tago et al., THE ACTIVITY OF CAO IN THE CAO-CACL2 AND CAO-CACL2-CAF2 SYSTEMS, ISIJ international, 35(2), 1995, pp. 127-131
Citations number
19
Categorie Soggetti
Metallurgy & Metallurigical Engineering
Journal title
ISIJ international → ACNP
ISSN journal
09151559
Volume
35
Issue
2
Year of publication
1995
Pages
127 - 131
Database
ISI
SICI code
0915-1559(1995)35:2<127:TAOCIT>2.0.ZU;2-H
Abstract
To clarify the refining ability of the CaO-CaCl2-CaF2 systems and the effect of replacement of CaF2 with CaCl2 on the CaO activity, the acti vities of CaO in the CaO-CaCl2 and CaO-CaCl2-CaF2 systems were measure d at 1 673 K by employing a chemical equilibration technique. The acti vity of CaO relative to liquid CaO in the CaO-CaCl2 system was observe d to have negative deviation from ideal behavior with the solubility o f CaO being X(CaO)=0.32. The activity of CaO in the CaO-CaCl2-CaF2 sys tem at 1 673 K decreases by replacing CaF2 with CaCl2 at constant CaO content. The refining ability of the CaO-CaCl2-CaF2 fluxes is discusse d. The activity coefficient of calcium in silver was found to be const ant up to the calcium content of 0.625 mass%. The standard Gibbs energ y of the formation of CaO was determined from 1 573 to 1 773 K.