AAC line, Autoclaved Aerated Concrete, AAC         

1. Germany technology
2.20 years experience
3.CE/SGS/ISO9001
4.50000-300000m3 capacity

Dongyue Machinery Group is a company specialized in producing AAC BLOCK MACHINE,AAC PANEL MAKING MACHINE,The capacity is between 50000m3 to 300000m3 per year.

With technology cooperation with Germany company AAC CONCEPT,Our aac block machine inherits germany technology.So far we have 15 line of AAC block machine in Indonesia,10 lines in india,5 lines in Vietnam,2 lines in Buma,2 lines in Mongolia ,1 line in Kazakhstan ,1 one in Bulgaria

                           Technology transfer cooperation with Germany AAC CONCEPT   GMBH

2.What is AAC?

AAC is a kind of light cellular silicate products. Main material based on Silicon materials ( sand, fly ash,gangue contains silicon)and Calcium(cement and lime),mix with foaming agent (Aluminium powder), after batching, mixing, pouring,pre-curing,cutting,stream(autocaled),and other process ,finally, get this light weight concrete products..          

   

3.AAC raw material introduction

 

 

Fly-Ash:   fly ash is waste from Thermal plant.Fly ash is rich in silica and aluminum oxide ,so it is good  raw material to make aac block. Fly ash is also divided into two kinds--wet fly ash, dry fly ash.The dealing way will vary as per the fly ash condition

 

Sand:   Except fly ash,Sand can be the main material too.The requests is that the Silica content is above 69% .Sea sand can not be used as aac raw material.

 

Lime:     Active powered lime is a requirement for giving the real aeration to the product. In phase 1 we can aim to buy the active lime directly. In phase -2 we can think of having backward integration and making a lime powering unit at site to have a more competitive advantage, We can also think of a lime  burning klin inside the factory premises.   The project financials however have not considered  the costs of powering unit, and the lime kiln in this project.     Different qualities of lime are available, and depending on the raw materials, the mix design can be chosen to get the optimal quality of production.  

 

OPC cement.    This Project aims to utilize OPC cement as main binder material. It will give faster strength to the bricks, besides giving  improved consistent quality. It also ensures a better cost effectiveness for the same. Using OPC will be a standardized practice. The other prime advantages of using OPC (compared to other binders) is it's easy availability locally through nationwide Retail Network of Cement Companies.   

 

Gypsum:     This too is an industrial waste. This is available as an industrial byproduct of Fertilizer Plant. Gypsum is responsible to give long term strength to the Blocks.      

 

Aluminum Power.     Finely ground Aluminum power is used in very limited quantity ( less than 0.5%), so that it reacts with active lime, and silica in base material to make the aeration,

 

Name	Unite	Cement lime fly ash
Fly ash	%	65-70
Cement	%	6-15
Lime	%	18-25
Gypsum	%	3-5
Aluminum powder paste(600kg/m3)	1/10000	8
Water & material rate		0.6.-0.65
Casting system	°C	36-40
Aluminum mixing time	S	30-40

(11) cement lime sand style aerated block raw material proportion

Name	Unit	Cement lime sand
Sand	%	55-65
Cement	%	10-20
Lime	%	20-30
Gypsum	%	2-3
Aluminum powder paste(600kg/m3)	1/10000	8
Water & material rate		0.65-0.75
Casting system	°C	35-38
Aluminum mixing time	S	30-40

 

4.AAC Brick production process

 

The Process of manufacture is simple t follow, and complex to implement. 

 

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

                               AAC BLOCK MACHINE WORKING PROCESS

5.AAC Brick production line prepartion work

 

. Land of 4 Acres is Required

 

2. Workshop area –approximately 30000 Sq Mt or 30000 sft

 

3. Total Plant area( construction area ) = 4500 Sq Mt or 45000 sft

 

4. Power connection needed – 500 KVA

 

5. Ideal manpower requirement is 40 nos. (Skilled – 10, semi skilled-10 and unskilled 20)

 

6. Skill division 40 workers = Main plant 2 nos of 10 hour shifts 15 people each + Boiler & Autoclave section 3 people in 3 shifts of 8 hours

 

 

7. Water requirement approximately 225 Tons per Day.

 

 

8. Fly Ash requirement approximately 225 Tons per day

 

 

9. The above power and plant calculations are based on Fly ash based AAC without Lime Crushing Unit and Ball mill for sand. If the process so require, we may add them at a later stage. But surely we give provisions for them at site right from installation stage

 

 

10. 300 working days is considered in a year through 333 days a year is possible.

 

11 Fly to be provided free of cost by power plants. Only transportation to be arraigned by Project. Average distance of 250 KM

 

12. Carbon Credit is estimates are for reference purpose. The Project owner must handle his part of CDM project to get Carbon credits, through independent consultants. Please check the form of CDM after 2012

 

13. AAC Blocks of all sizes will be manufactured according to the market requirement, though mainly stipulated sizes as per the BIS standards

 

6.AAC Brick production line transportation overview

 

1.Normally Cutting machine,boiler will be shipped by flat rack

2.Autoclaves are shipped by bulk cargo

3.The other parts will be contained in container.

 

7.AAC Brick production line installation overview

 

 

                                             aac block machine installtion overview

8.AAC BRICK PRODUCTION LINE PLANT OVERVIEW