46% mgcl2 flake used for mgo board production 1. Used for mgo board production 2. Purity above 93% or ... As the monoclinic crystal, salty, has certain corrosion resistance. For making metal magnesium, disinfectants, frozen brine, pottery and porcelain ... ware, ceiling, floor brick, magnesia cement, ventilation pipes, anti-theft covers, fireproof doors and Windows, fire prevention board, partition board ...