... -325 mesh Mainly used for precision casting chamotte sand and chamotte flour Characteristics of chamotte sand and chamotte flour: 1. High refractoriness ... Product rate is high. Specifications of chamotte sand and chamotte flour:Size of Precision casting sand : 8-16, 16-30, 30-60, ... 20 (mesh)Size of Precision casting flour: -200, -250, -270, -325 (mesh)Features of chamotte sand and chamotte flour:All of ...