PROCESS FOR OBTAINING SIZE-CALIBRATED TRI-CALCIUM ALUMINATE PARTICLES AND USE OF SUCH PARTICLES IN A PROCESS OF ALUMINA REFINING

摘要

The present invention describes a process for obtaining size-calibrated tri-calcium aluminate (TCA) particles comprising the steps of providing a process liquor containing sodium aluminate; providing a suspension of size-calibrated calcium hydroxide particles; mixing said selected suspension of size-calibrated calcium hydroxide particles with said process liquor to allow them to react to obtain the said size-calibrated tri-calcium aluminate particles.