AAC Block production line

We are professional manufacturer of autoclaved aerated concrete equipments,shorting of AAC plant, including stocking raw materials, mixing, molding, forming, cutting, evaporating and curing, crane cramp, transporting etc., and We can supply complete set of autoclaved aerated concrete equipments with 50, 100, 150 and 300 thousand m3 capacity annuely, including plant design, equipments installation, technical instruction, personel training, etc., and also can design and manufacture as per clients' requirement.(Based on 50000 m3 capacity) A. Plant design: 1. Plant area is 10000-20000 m2, and we can make design based on your actural area; 2. Plant should have raw materials field and finished products field; 3. Plant should have maintainence workshop, test room, warehouse,etc. 4. The plant construction time (from earthworks to trial operation) is about 6 month. B.Raw materials and techincal data: (1). Quicklime: CaO content, ≥75%; clearing up time, 8-15 minute; clearing up temperature, ≥65; Overheating lime content, ≤8%; Ash content, ≤10%; MgO, ≤5%. (2). Gypsum: dihydrate plaster stone or phosphogypsum, sulphur trioxide content, ≥35%. (3). Aluminium powder: activated aluminium content, ≥90%. (4). Cement: 32.5R bulk cement. (5). Fly ash: carbon content, 3%; OR Sand: SiO2 content, 85%; Clay content, 3%; Free from weed and carpolite. C.Main technical data: (1). Finished products: 600KG/m3; (2). Proportion: cement, 8%; Quicklime, 19%; sand, 70%; Gypsum, 3%; aluminium powder, 450g/m3; addictives: 400g/m3. (3). Each mould products: 4.0×1.2×0.6=2.88 m3. (4). Agitation period: 6-7 minute; (5). Pouring slurry temperature: 45-48; (6). Concrete green body staying time in precuring room: 2.0-2.5hours; staying temperture: 40 or so; (7). Steaming with pressure: Entering into and out from kettle: 0.5 hour; Vacuumizing process (evacuating process): 0.5 hour (0-0.06Mpa); Pressure steping up: 1.5 hour (-0.061.3MPa); Constant pressure: 6 hours (1.3 MPa,183); Pressure steping down: 1.5 hours (1.3MPa0); Total 10 hours. D. Water, power and gas supply: Water: 200 M3 per day; Power: one set of 200-300kVA transformer; Gas: one set of DZL4-1.6-A boiler with gas pressure of 1.2MPa. E. Manufactured products: Body of bearing wall and nonbearing wall, multifloor (less than 6 floor) bearing wall blocks, insulating blocks and wallboard. 45 kinds of products can be manufactured according to clients requirement. Length: 600mm; Height: 150,200,250,300mm; Thickness: 50,100,150,200mm 60,120,180,240 mm Products quality: Unit weight: Class 05, 06, 07; Compressive strength: 2.53.55.0MPa; Drying shrink: less than 0.8 mm/m; Thermal conductivity: 0.11 0.13Kcal/M.h F. Production process Aerated concrete is made of the raw materials silica sand (or fly ash), lime and cement. The silica sand is ground to fine sand slurry and then fed into the mixer and, according to variable recipes, mixed with the bonding agents and the aluminium dispersion. The ready mixture is immediately filled into a mould and transported to the fermentation area. In the fermentation area the mixture reacts to become an aerated concrete cake by means of generation of hydrogen, and starts to stiffen. When the cake is stiff enough to be cut the blocks are cut in the cutting line to the required dimensions. The blocks obtain their final strength by means of hardening under steam pressure in the autoclaves.