... big grain,main use silicon material (for example:coal ash,sand,stone dust and others ),through making ... if has enough degree of small (for example coal ash.Mixing calcium material lime cement water to ... raw material,have lowest wasteMain Material:coal ash sand waste mine material coal stone,stone dust and other ... come in and out autoclave about 0.5hour, steam curing cycle time about is 6 hours/1.6Mpa, ...