Preparation of calcium carbonate microrods from the gypsum scale layer of evaporation equipment.

The difficult-to-remove CaSO scale layer attached to an evaporator wall is a major problem in related industries. How to efficiently remove the CaSO scale layer and convert it into fine chemicals with high added value, so as to turn waste into treasure, is a current research hotspot. In this study, a CaSO scale layer was removed by 15 min rotary washing a phase transfer route.