... Specifications 1.Absolutely no asbestos calcium silicate board 6mm 2.Factory owns 4 patents 3 ... )Length(mm)6,8,9,1012202440 Calcium silicate board is made from siliceous material ( the main ... such as lime, calcium carbide sludge, cement ), reinforced fiber, additives, and so on. In the process of mold ... per year. is 10 million square meters calcium silicate board. Now, the second & third factory are under ...