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What are the core equipment of the AAC production line?

The core equipment of the AAC (autoclaved aerated concrete) production line mainly includes the following categories:

Raw material processing equipment:
Crusher: used to crush raw materials such as limestone, sand, etc.
Ball mill: used to grind raw materials to achieve the required fineness.

Mixing and pouring equipment:
Mixer: Mix siliceous materials (such as sand, fly ash), calcium materials (such as cement, lime) and gasifiers (such as aluminum powder) into slurry.
Pouring machine: Pour the mixed slurry into the mold to form a green body.

Pre-curing and cutting equipment:
Pre-curing room: Perform preliminary curing on the cast green body to achieve cutting strength.
Cutter: Cut the pre-cured green body into blocks or plates of the required size, usually including horizontal cutters and vertical cutters.

Autoclave curing equipment:
Autoclave: Put the cut green body into the autoclave and autoclave it with high-temperature and high-pressure steam to harden the green body and obtain the required physical properties.

Finished product processing equipment:
Packaging machine: Packs finished products after autoclaving for easy transportation and storage.
Transmission equipment: includes various conveyor belts and manipulators, which are used to transfer raw materials and products between various processes of the production line.

These core equipment together constitute the main processes of the AAC production line, ensuring that the entire production process from raw material processing to finished product packaging is carried out efficiently and orderly.

How does the ratio of different raw materials (such as fly ash, sand, cement) in AAC production affect the performance of the final product?

In the production of AAC (autoclaved aerated concrete), the ratio of different raw materials has a significant impact on the performance of the final product. The following is the specific impact of the main raw materials and their ratios on the performance of AAC products:

Fly ash:
Proportion: The usage amount of fly ash is usually between 50-70%.
Influence:
Density: Increasing the proportion of fly ash can reduce the density of the product, making it lighter.
Strength: An appropriate amount of fly ash can improve the strength of the product, but too much will lead to a decrease in strength.
Insulation properties: Fly ash helps to improve the insulation properties of the product because its particles are small enough to fill the pores in the concrete.

sand:
Proportion: The amount of sand used is usually between 20-40%.
Influence:
Density and strength: Increasing the proportion of sand can improve the density and strength of the product, because the sand particles are larger and can provide better skeleton support.
Processing performance: The particle size and content of sand have an impact on the fluidity and pouring process of the mixture. Excessive sand will increase the viscosity of the slurry and affect the molding.

cement:
Proportion: The amount of cement used is usually between 10-20%.
Influence:
Strength: Cement is the main cementing material, and its proportion directly affects the strength of the product. Increasing the cement ratio generally increases the early and final strength of the product.
Durability: The right amount of cement can improve the product’s durability and resistance to chemical corrosion.

lime:
Proportion: The amount of lime used is usually between 10-20%.
Influence:
Gas generation reaction: Lime reacts with aluminum powder to produce hydrogen, which expands the slurry and forms a porous structure. The proportion of lime directly affects the gas generation effect and pore structure.
Strength and durability: The right amount of lime can improve the strength and durability of the product, but too much lime can cause the product to become more brittle.

Aluminum powder:
Ratio: The amount of aluminum powder used is usually between 0.05-0.1%.
Influence:
Porosity: Aluminum powder is a gas-generating agent, and its proportion determines the expansion degree and porosity of the slurry. An appropriate amount of aluminum powder can form uniform pores and improve thermal insulation performance, but too much aluminum powder will cause excessive pores and reduce strength.

water:
Ratio: The amount of water used is adjusted according to the ratio of other raw materials and process requirements.
Influence:
Working performance: The proportion of water affects the fluidity and operability of the slurry. Too much water will reduce the strength, while too little water will affect shaping and cutting.

The reasonable ratio of raw materials is the key to ensuring the excellent performance of AAC products. The right balance of raw materials needs to be maintained to achieve optimal density, strength, insulation and durability. During the production process, the formula needs to be adjusted and optimized according to specific process and usage requirements.