... year2. Drying methods: using boiler and autoclave3. Raw material: Fly ash(or Sand), cement, lime, gypsum, aluminum powder paste. The autoclaved aerated ... . Generally, fly ash or silica sand is grinded into slurry with water, and then mixed with lime powder, proper cement, gypsum and ... follows:(1) The raw materials such as lime, cement, gypsum, sand(or fly ash), etc are stored in silo(tank) for use ...