... machine3.Very good Future prospect4.Sand or Fly ash aac blockIntroduction of 20,000-300,000m3/ year ... year,2. Drying methods: using autoclave3. Raw material: Fly ash(or Sand), cement, lime, gypsum, aluminum powder paste, ... to produce aerated concrete block. Generally, fly ash or silica sand is grinded into slurry with water ... as lime, cement, gypsum, sand(or fly ash), etc are stored in silo(tank) for use ...