Solubility of CaS in CaCl₂–LiCl Eutectic Melt

Abstract

Solubility of CaS in molten CaCl₂–65 mol%LiCl eutectic salt was examined by sampling of CaS saturated salt and ICP analysis. The handling in dried environment and an adequate mass of melt were applied for reliable measurements, in addition to suppression of inclusion of CaS particles. The solubility limit was found to be 0.22 ± 0.05, and 0.31 ± 0.05 mol%CaS at 873 K and 973 K, respectively. This saturation value was less than 1.77 ± 0.1 mol%CaS in pure CaCl₂ at 1173 K.

Solubility of CaS in the eutectic melt (CaCl₂–65 mol%LiCl) is 0.31 ± 0.05 mol%CaS at 973 K, and 0.22 ± 0.05 mol% at 873 K.