China Aluminum Industry Network "Smelting aluminum" refers to the process of producing "casting aluminum alloys" in the aluminum industry. These alloys are primarily composed of aluminum and silicon, with some additional alloying elements introduced for better casting properties. The end result is a cast product, typically with a rough surface and often used as raw material. Raw aluminum is not pure; it contains impurities and, like cast iron, tends to be brittle when broken.
On the other hand, "matured aluminum" refers to "deformable aluminum alloys," which are divided into seven main international series: 1000 series (pure aluminum), 2000 series (aluminum-copper), 3000 series (aluminum-manganese), 4000 series (aluminum-silicon), 5000 series (aluminum-magnesium), 6000 series (Al-Mg-Si), and 7000 series (Al-Zn-Mg). Products such as aluminum pipes, bars, profiles, wires, plates, and foils all fall under this category. These materials are processed through deformation techniques, including rolling, extrusion, or forging. They can consist of either pure aluminum or aluminum alloys. It's important to note that the term "alloy" is not a classification on its own but rather a general term encompassing both pure aluminum and various aluminum-based alloys.
In modern terminology, "raw aluminum" and "matured aluminum" are now commonly referred to as "cast aluminum" and "deformable aluminum," respectively. "Scrap aluminum" refers to used aluminum materials that have been discarded and reintroduced into the market. This includes both "cast aluminum" and "deformable aluminum." However, scrap aluminum on the market varies in quality and composition. It's crucial to classify these materials strictly according to their alloy type before reuse, ensuring proper handling and recycling processes. Understanding the differences between these types of aluminum helps in selecting the right material for specific industrial applications.
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