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Specifications
Autoclaved Aerated Concrete block machine1.Germany Technology
2.Japan automatic system
3.China local experience
4.ISO,CE
Autoclaved Aerated Concrete block machine
1.AAC block machine main materials:
The main materials are sand/ fly ash,cement,gypsum,lime,aluminum powder
1. Sand (50-60%) | ||||
Super grade |
First grade |
Qualified product |
||
SiO2 |
≥ |
85% |
75% |
65% |
CI |
≤ |
0.02 |
0.03% |
0.03% |
Mica |
≤ |
0.5% |
0.5% |
1% |
SO3 |
≤ |
1% |
1% |
2% |
Clay |
≤ |
3% |
5% |
8% |
KO2 + Na2 |
≤ |
1.5% |
3% |
5% |
2. Lime (8-25%) | ||||
Item |
Grade |
|||
Super Gr. |
1st Gr. |
2nd Gr |
||
A(CaO+MgO) Quality Fraction % |
≥ |
90 |
75 |
65 |
MgO Quality Fraction % |
≤ |
2 |
5 |
8 |
SiO2 Quality Fraction % |
≤ |
2 |
5 |
8 |
CO2 Quality Fraction % |
≤ |
2 |
5 |
7 |
Digestion speed ,min |
≤ |
5-15 |
||
Digestion temperature , °C |
≥ |
60-90 |
||
Undigested residue quality fraction ,% |
≤ |
5 |
10 |
15 |
Fineness (0.080 square hole sieve left amount) % |
≤ |
10 |
15 |
20 |
3.Cement (6-15%) | ||||||||
SiO2 |
Al2O3 |
Fe2O3 |
CaO |
MgO |
C3S |
C2S |
C3A |
C4AF |
21-23 |
5-7 |
3-5 |
64-48 |
4-5 |
44-59 |
18-30 |
5-12 |
10-18 |
4. Gypsum/Plaster (3-5%) | ||
CaSO4 |
> |
70% |
MgO |
< |
2% |
Chloride |
< |
0.05% |
Preferably ground residue 90µm |
< |
10-15% |
5. Aluminium Power (about 0.08%) | |||
Type and recommendation for supply depend on raw materials and mix formula | |||
Metal Content |
Approx. |
>=65% |
Powder |
2.AAC block machine production process:
- First, the Fly Ash is mixed with water, and made Slurry in a slurry mixture. If
Sand is used as a base material, we need a ball mill to grind the sand to fine power. The
slurry making process is same sand.
- After Slurry is made, the slurry is stored in slurry storage tank, where the slurry is
constantly agitated. Care is taken to run the slurry storage tank all the time, so that is
never settles down the particles.
- Then a weigh batcher weighs the Slurry, lime, OPC, Gypsum and aluminum
power in preset quantities, and mixes thoroughly. The mixture also pours the mix into the
Mould carried n the mould cart. The full pouring of the mixture is just enough to fill
around 50% of the mould.
- Then the mould is kept in a warm chamber for 2 hours, so that the aeration and the
light initial setting takes place.
- Next process is de-molding process of the big block, in which a sophisticated
overhead hoist takes the mould, demoulds the block.
- Next process is the level wire cutting of the Block, while the block passes on the
cutting trolley through the series of wires. This process follows a vertical wire cutting
where as the block remains stationary, and the cutter cuts the block vertically.
- The final cut blocks are Steam cured in autoclaves for 8 hours at 12 KG/Sq cm
pressure, and 200D C
- The product is ready on the same date to go into the market.
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