Hopeland Co., Ltd.

China Manufacturer with main products: aac plant, concrete pole making machine, concrete pipe mould

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Autoclaved Aerated Concrete (AAC) Plant Line

Specifications

30,000-300,000m3 Annual Output
Autoclaved Aerated Concrete (AAC) Plant ( Equipment Machine Machinery ) Production Line
Autoclave Aerated Concrete Block Production Line Designing Scheme

Production Technique
1.     Product Principle
Technology location point
Production and application of aerated concrete has more than 40 years history in China. Viewing from technology point, high quality products can use 3mm special sand slurry technology, to meet the construction requests and 50% energy saving goals. (When under 3mm, take wall heating transmitting coefficient as 1, when concrete slot become over 3mm, take wall heating transmitting coefficient as 1.5). Based on the history of the aerated concrete development, only high quality products can bring a prosperous market. Thus, this scheme designed according to China standard GB11968-2006.
 
Capacity
The product is aerated concrete block. Capacity is 150,000 m3/year. The first period can be collocated according to 100,000m3/year. Considerate the customer requirments, make reservation for panel materials.
 
Production Specification
According to GB11968-2006 standard 04~07 grade.
Gerneral Specifications of Aerated Concrete Block
Length(mm)
Height(mm)
Width(mm)
600
200
250
300
60
120
180
240
(increase by 60)
75
100
125
150
(increase by 25)
2. Technical Summary
1) Raw materials storage and process
Flyash powder and plaster
Flyash powder(considerate of both for dry and moist materials.), phosphate plaster and waste slurry are mixed according to a fixed proportion, and store the mixed slurry to 50m3 storeage container. To pump the mixed slurry by lurry pump to slurry mixing tank.
Calcined lime
Numbly lime is carried to the factory by a dump truck and unloaded to the lime material shed. Then it is sent to compound pendulum jaw crusher to shatter after manual estimate, and is sent to lime head container by bucket elevator after it is shattered. The lime is sent to the high pressure mill by bin bottom feeding machine to pulverize. The pulverized lime sent to bucket elevator by mill exit helix conveyors, and then it is sent by bucket elevator to the lime powder container in the dosing building for further use.
Cement
The cement is carried into the factory by bulk-cement delivery tanker and pumped directly to the lime powder container in the dosing building for further use.
Aluminium paste
The sacked aluminium paste is bought from other places in the country and stored in the aluminium paste warehouse. Use electric block suspend it to the 2ed floor of the dosing building, and put it in the aluminium paste blender after estimate is done. Then it will be stirred into suspension for use.
Additives
Additives are brought by the specified manufacturer and stored in sacks according to the material quantity.
Scrap material, waste slurry
Scrap material cut by the cutting plane line, falls into the bottom chute, flushed by water into the waste slurry pool in the bottom of the cutting machine, and is pumped to the waste slurry storage tank by vertical mud pump. When it reaches a certain concentration, pulp it together with fly ash and adjust the proportion. Finally, put it in the slurry storage tank for use.
Magnesite (while producing sheet material)
    Magnesite is sacked powder material and is delivered by bucket elevator or strength to powder container for use. This storehouse is used to store powder lime while not producing sheet material.
2.  Dosing, stirring, pouring
    When the valve of bottom of the slurry storage tank is opened, slurry is put into slurry metering balance of the dosing building to measure. When the weight of slurry reaches the dosing requirements, the dumping valve is shut by automatic system and dumping is stopped. The measured slurry is put into the pouring blender directly.
Cement and lime are delivered into electronic powder metering balance by single-solenoid machine in the bottom of the storehouse,and then are sent to pouring blender by helix transport machine after cumulative metering.
Aluminium powder is put into aluminium powder blender after it is measured by specific metering device. It is made into suspension and this is done once per mould.
The feeding order is: ①flyash and gypsum, ②additive, ③cement, ④lime, ⑤aluminium powder suspension.
Before pouring, the temperature of slurry should reach that of the technological requirements. While pouring, mould is delivered right under the pouring blender by shuttle, and the unloder arm at the bottom of the pouring blender drops, pours and hoists gradually through cylinder as the level of material goes up. After pouring, mould is moved in maintenance room to stay still and maintain first.
3. Cutting and Grouping
While it reaches cutting intensity during stay, the mould is swung and overturned to the special larry of cutting machine by the overturning hanger of cutting plane line traveling crane (10t), then unload the mould and make the billet stand on one side. The cutting of the billet is completed by slitting and crosscutting mechanisms.
The already cut billet together with the side plate is swung to hardening car before the autoclave by intermediate hanger of loading overhead before the autoclave (5t), with two moulds stacked in one car. The well stacked hardening cars, being draught by a slow-acting windlass, are organized into groups on tramroad in front of the autoclave.
4. High pressure steam maintenance and finished product
The well grouped billets are pulled in the autoclave and maintained with the saturated steam, with about 12 hours maintaining time under 1.2MPa pressure.
Manufactured articles, already maintained by high pressure steam, are pulled out of the autoclave, and then the finished products are swung by finished hanger of electric bottle (5t) out of the autoclave into transport vehicles or cars which will carry them to storage yard.
5. Side plate returning, mould assembling and lubrication
With the winging of completed articles completed, the side plate on the hardening car together with the car itself returns at the turn-around line via shuttles. Dollies are swung on tramroad in front of the autoclave by loading overhead crane (5t), waiting for yard-frame grouping. The side plate is returned to table roller (scheme one) or side plate frame (scheme two), and mould assembling of it with die grid is done by overturn traveling crane (10t). Moulds are overturned and swung to mould turnaround line by this traveling crane to clean and lubricate and then to pour circularly.
 
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