気泡入りアルミニウムペースト（スラリー）／パウダーの製造工程は、最終製品の品質と性能を決定する上で極めて重要である。本章では、気泡入りアルミニウムペースト（スラリー）／パウダーの製造工程における各段階の製造フロー、主要技術、管理ポイントについて詳述し、この重要な材料の製造について読者の理解を深める一助とする。

2.1 生産の流れ

気泡入りアルミニウム・ペースト（スラリー）／パウダーの製造フローには、通常、以下の主なステップが含まれる：

2.1.1 原材料の準備

生産を開始する前に、原材料の選択と準備が重要である。その メイン 原料には、アルミニウム粉末、添加剤（DEG、分散剤など）、その他の成分が含まれる。アルミニウム粉末の選択は、通常、粒径、活性、純度に基づいて行われる。活性の高いアルミニウム粉末は、水と反応した際に水素ガスを多く発生させることができるため、より優れたガス発生効果を得ることができる。添加剤の選択は、流動性の改善や反応性の向上など、気泡入りアルミニウムペーストにおける役割を考慮する必要がある。

2.1.2 Mixing

The prepared aluminum powder and additives are mixed in a certain proportion. This step usually uses high-efficiency mixing equipment to ensure uniform component distribution and avoid agglomeration. The mixing time and speed must be strictly controlled during the mixing process to ensure a sufficient combination of aluminum powder and additives, laying a good foundation for subsequent reactions.

2.1.3 Grinding and Classification

The mixed materials need to be ground to reach the specified particle size. This step is crucial for improving the activity of the aluminum powder. Using ball mills or other types of grinding equipment can effectively reduce the particle size and increase the surface area of the aluminum powder, thereby enhancing its reactivity with water. After grinding, the materials must also be classified to ensure particle size and product distribution consistency.

2.1.4 Paste Preparation

In this step, the ground aluminum powder is mixed with water and other necessary additives to form the aluminum paste. The reaction conditions at this time (such as temperature and stirring speed) need to be controlled to ensure that the reaction between aluminum powder and water is sufficient to generate a stable bubble structure. Better gas generation effect and fluidity can be obtained through reasonable proportioning and stirring.

2.1.5 Storage and Packaging

The prepared aerated aluminum paste (slurry) must pay attention to environmental conditions during storage and transportation, avoiding high temperatures and humidity to prevent premature reaction and failure. Its physical and chemical properties should be checked regularly during storage to ensure stable product quality. Finally, the aluminum paste must be packaged according to standards to ensure no leakage or deterioration occurs during transportation.

2.2 Key Technologies

In the production process of aerated aluminum paste (slurry)/powder, several key technologies have a profound impact on the performance and quality of the final product:

2.2.1 Ball Milling Technology

Ball milling is an important technology for grinding aluminum powder. The physical grinding process can effectively reduce the particle size of the aluminum powder and increase its specific surface area. Smaller particle sizes help enhance the reactivity of the aluminum powder, allowing it to generate hydrogen gas more rapidly when reacting with water, thereby forming a uniform and stable bubble structure.

2.2.2 Classification Technology

Classification technology plays an important role in ensuring the consistency of the particle size distribution of aluminum powder. Through classification, aluminum powders of different particle sizes can be separated, improving the activity and adaptability of the material. A suitable particle size distribution can optimize bubble formation and enhance aerated concrete’s strength and thermal insulation performance.

2.2.3 Reaction Control Technology

In the preparation process of aluminum paste, controlling reaction conditions (such as temperature and time) is crucial. Reasonable reaction conditions can ensure that the reaction between aluminum powder and water is sufficient to generate an adequate number of evenly distributed bubbles. The application of reaction control technology helps to improve the stability and consistency of the product.

2.2.4 Formulation Optimization Technology

Product performance can be improved by continuously optimizing the formulation of aluminum paste (slurry). For example, adding appropriate amounts of certain additives can increase the aluminum powder’s reaction rate and improve the aluminum paste’s fluidity and stability. In addition, for different application needs, enterprises can develop various types of aluminum paste to meet the market’s diverse needs.

2.2.5 Environmental Control Technology

In production, controlling environmental conditions (such as temperature and humidity) is also crucial to ensure product quality. Especially in the storage and transportation stages, it is necessary to provide suitable environmental conditions to prevent the aluminum paste from failing or deteriorating due to environmental changes.

2.3 Quality Control

Quality control is an important link throughout the production process to ensure the stable performance of aerated aluminum paste (slurry)/powder. Enterprises usually establish a complete quality management system, including:

2.3.1 Raw Material Inspection

Before production begins, all raw materials must undergo strict quality inspection to ensure they meet production standards. The aluminum powder’s activity, purity, and particle size distribution need to be tested to determine whether it meets the production requirements.

2.3.2 Process Monitoring

During the production process, the parameters of each stage (such as temperature, humidity, mixing time, etc.) are monitored in real-time to ensure that the production process is always in the best state. In addition, online testing equipment can detect and adjust problems in time to prevent the generation of unqualified products.

2.3.3 Finished Product Inspection

After the product is produced, comprehensive performance testing of the finished product is required, including indicators such as fluidity, gas generation, and compressive strength, to ensure that it meets relevant standards and customer needs. Only products that have passed strict testing can be put on the market for sale.