On account of the different dissolving properties of KCl and NaCl, the base material in the hot dissolution process is a saturated solution (mother liquor). After heating to ~ 120°C, crude salt (NaCl and KCl) is added. As the mother liquor is already saturated with NaCl, the NaCl does not pass into the solution and can be drawn off in the clarifier. In at least 3 successive crystallizers, the dissolved KCl is cooled down and precipitates. In the thickener, KCl is concentrated up to 97 wt% and separated from the mother liquor. The resulting saturated NaCl solution returned into the first process step as mother liquor.
The LiquiSonic® analyzer provides a precise inline concentration determination, based on sonic velocity measurement. Each process step (crude salt dissolution, clarification, crystallization, thickening) can be monitored, controlled and optimized in real-time. LiquiSonic®convinces customers with quality improvement and economic advantages, such as saving energy and materials.