46% mgcl2 flake used for mgo board production 1. Used for mgo board production 2. Purity above 93% or above 45% ... pottery and porcelain, and used to fill the fabric, paper, etc. Its solution is mixed with magnesium oxide, also ... , floor brick, magnesia cement, ventilation pipes, anti-theft covers, fireproof doors and Windows, fire prevention board, partition board, the production of artificial ...