... it is used to produce metal magnesium, liquid chlorine and high-purity magnesia.3, In the construction material industry it ... magnesium carbonate articles it can be used to produce high-quality magnesium tile, high-quality fireproofing board, magnesium packing box, magnesium decoration board, ... . if you have any question,please contact me freely! 2012 high quality 46%min magnesium chloride powder