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Main Process Flow of AAC Block Production Line:
1. Dose and match measured raw materials;
2. After distributing, feed raw material into pouring mixer to make slurry.
3. Through thoroughly mixing, the slurry is poured to mould; ,
4. After pre-curing under a certain temperature and time, the block would reach a certain hardness and prepare for cutting;
5. Tilting hoister would turn over 90 degrees of mould;
6. Then open the mould and separate it from block. And take the block with side plate to the cutting cart;
7. The horizontal cutting machine cuts blocks from both sides.
8. Then the vertical cutting;
9. After cutting, the block is hanged to curing carts with side plate by semi-finished product hoister;
10. Grouping the carts and put them into autoclaves;
11. Curing the blocks under certain temperature and pressure;
12. Carry the finished product out of autoclave by the winch.
13. The finished product hoister take the finished product to finished blocks area;
14. The side plate return back through side plate roller;
15. Side plate would be organized with open mould for the next circle.
AAC Blocks Introduction:
AAC (autoclaved aerated concrete) block is made mainly of sand / flyash,cement,aluminium,lime,gypsum, under the
high temperature ,high pressure and steam curing . It's a new type building materials ,has its incomparable advantages ;
1. Lightweight: Porosity achieve 70% to 85%, volume density is generally 500-900kg/m3, as 1/5 of general concrete brick, the 1/4of clay brick, the 1/3 of hollow brick, and similar to the wood which can float in water. It can reduce building weight, reduction in the cost of integrated building, moreover, prolong building's life.
2. Fireproof: Most of the major raw materials is inorganic materials, so it has good fire resistance, and do not emit harmful gases when meet fire. Fire 650 degrees, as a refractory material, the thick up of 100 mm walls can reach to 4 hours fire resistance, 300mm thick up wall can reach to 9 hours fire resistance.
3. Sound insulation: Due to a unique porous structure, so it has a sound absorption capacity. The sound absorption capacity can reach of 100mm thick wall up to 41 db.
4. Insulation: As the material inside has a large numbers of the pores and porous, which has a good thermal insulation properties. The Thermal conductivity is 0.11-0.16W/MK, as 1/4-1/5 of brick. Typically, the insulation effect of 20cm thick aerated concrete wall is equivalent to 49cm thick solid brick walls ordinary.
5. Permeability: Result of material by the composition of many independent small pores, the moisture absorption is slow, in the volume of absorbent is 5 times of clay saturation do. When used in the bathroom, the wall can be treated to interface directly paste tiles.
6. Anti-seismic: The same building structure, improve the two seismic than the brick level.
7. Green: Manufacturing, transportation, all use the process of non-pollution, to protect arable land, saving energy, is one kind of a green building material.
Raw Material For AAC light weight blocks :
| Fly ash style aerated block raw material | Sand style aerated block raw material | ||
| Parameter Name | Parameter Value | Parameter Name | Parameter Value |
| Fly ash | 65-70% | Sand | 55-65% |
| cement | 6-15% | cement | 10-20% |
| Lime | 18-25% | Lime | 20-30% |
| Gypsum | 3-5% | Gypsum | 2-3% |
| Aluminum powder paste | 8 | Aluminum powder paste | 8 |
| Water & material rate | 0.60-0.65 | Water & material rate | 0.65-0.75 |
| Casting temperature | 36-40°C | Casting temperature | 35-38°C |
| Aluminum mixing time | 30-40s | Aluminum mixing time | 30-40s |
| No | Indicators | unit | Data |
| 1 | Name | AAC Blocks | |
| Scale | Cubic meter | 300,000 | |
| Size4.8X1.2X0.6) | m | GB11968-2006 | |
| 2 | Working Shifts | hour | 22. 5/day |
| 3 | Main raw materials Consumption | B(06)Level | |
| 1 Mineral sand(70%) | ton/year | 126000 | |
| 2 Lime(17%) | ton/year | 30600 | |
| 3 Gypsum(3%) | ton/year | 5400 | |
| 4 Cement(10%) | ton/year | 18000 | |
| 5(500g/m³) | ton/year | 75 | |
| 4 | Annual Transportation | ||
| 1,Raw Material Input | ton/year | 180000 | |
| 2,Finished Block Output | cbm/year | 300000 | |
| 5 | Power Supply | KW | 1000 |
| 6 | Annual Power Consumption | 10000RBM KW. h | 552 |
| 7 | Daily Water Requirement (without water for boiler and cooling | m³ | 252.7 |
| 8 | Annual Gas Requirements | T | 39000 |
| 9 | Working Staff | person | 30 |
| Workers For production | person | 25 | |
| 10 | Efficiency | ||
| Staff Working Efficiency | cbm/person•year | 10000 | |
| Production Workers Efficiency | cbm/person•year | 12000 | |
| 11 | Plant Area | acre | 100 |
| Production Area | m² | 16000 | |
| Finished Block Area | m² | 26000 | |
| 12 | Project Investment | 10000RMB | 6100(not including land) |
| 13 | Annual Sales | 10000RMB | 7000 |
| 14 | Annual Profit | 10000RMB | 2400 |
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