Main Raw Material for AAC BlockMain Raw Material for AAC Block
1). Sand (fly ash, slag): meet standard JC/T622-1996, technical requirements: SiO2s >65%, 0.08mm residue on sieve <20%, CaCO3<10%, So3<2%, clay<8%, no impurity.
2). Lump quick lime: meet standard JC/T621-1996, technical requirements: A-CaO>65%, slacking time 8-15min, slacking temperature >65°C, burnt lime content <8%, ash content <10%, MgO <5%.
3). Gypsum: technical requirement: Dihydrate gypsum or phosphogypsum, SO2 content >35%.
4). Aluminium powder or aluminum paste: solids content >65%,
5). Cement: meet standard GB175-92, 32.5R bulk cement.
Material milling Equipments
1).Crusher: Lime, gypsum, and such kind of bulk material need to be crushed as the first step in AAC Plant.
2). Ball mill: The AAC material must be fully grinded in order to make better reaction. Ball Mill is used widely, it has two types: dry and wet, can be chosen upon requirement.
3). Material Metering Equipments: Computer Control Automatic Metering System is commonly used as measurement of raw materials.
4). Material mixing and casting equipments: Mixer, it’s the slurry mixing machine, also is slurry casting machine.
5). Cutting Machine: the AAC blank is formed after casting and precuring, as the size is too large, it must be cut to achieve the required product size.
6). Autoclave: Autoclave is a device for silicate hydration products to get physical and mechanical properties.
7). Boiler: the boiler supports for the autoclave and preheat furnace and other facilities with heat.