Aluminum ingots are classified into high-purity aluminum ingots, aluminum alloy ingots and remelting aluminum ingots according to their composition; they can be divided into round ingots, ingots, ingots, T-shaped ingots, etc. according to their shape and size.
Aluminum is a silver-white metal that ranks third in the earth's crust after oxygen and silicon. Aluminum has a low density and is called a light metal. Aluminum is a non-ferrous metal with high production and use, which is second only to steel in the world. The density of aluminum is about 1/3 of the density of steel and copper. Because aluminum is light in weight, it is often used in manufacturing, trains, subways, automobiles, airplanes, ships, rockets, and other land, sea and air vehicles to reduce the load by increasing its own weight. Similarly, aluminum is also prominent in military products.
Alumina, also known as aluminum oxide, is in the form of a white powder. The primary aluminum is a liquid aluminum liquid which is taken out during the electrolysis process and is not subjected to precipitation or the like. The primary aluminum can be turned into an aluminum ingot by in-vivo cooling into the cast aluminum ingot model. Therefore, alumina is the raw material for the aluminum liquid, electrolytic aluminum is the process, the primary aluminum is the aluminum liquid in the electrolysis process, and the aluminum ingot is an aluminum product, which is a marketable product that is finally circulating in the market.
Electrolytic aluminum is aluminum obtained by electrolysis. The modern electrolytic aluminum industry uses cryolite-alumina melting salt electrolysis. The molten cryolite is a solvent, the alumina is used as a solute, the carbon body is used as an anode, and the aluminum liquid is used as a cathode. After a strong direct current is applied, an electrochemical reaction is performed on the two poles in the electrolytic cell at 950 ° C to 970 ° C. Both electrolysis.
Industrial aluminum ingot
In our daily industry, the raw material is called aluminum ingot. According to the national standard (GB/T 1196-2008), it should be called “remelting aluminum ingot”, but everyone is used to “aluminum ingot”. It is produced by electrolysis using alumina-cryolite. There are two main categories of aluminum ingots after entering industrial applications: cast aluminum alloys and deformed aluminum alloys. Cast aluminum and aluminum alloys are castings for the production of aluminum by casting; deformed aluminum and aluminum alloys are processed products of aluminum by pressure processing: plates, strips, foils, tubes, rods, profiles, wires and forgings. According to the national standard, the aluminum ingot for remelting is divided into 8 grades according to its chemical composition, namely Al99.90, Al99.85, Al99.70, Al99.60, Al99.50, Al99.00, Al99.7E, Al99. 6E” (Note: the number after Al is the aluminum content). Some people call "A00" aluminum, which is actually aluminum with an aluminum purity of 99.7%, and is called "standard aluminum" in the London market. Everyone knows that China’s technical standards in the 1950s came from the former Soviet Union. “A00” is the Russian brand in the Soviet national standard. “A” is the Russian alphabet, not the English “A”, nor the Chinese alphabet. If "A" is in line with international standards, it is more accurate to call "standard aluminum". Standard aluminum is an aluminum ingot containing 99.7% aluminum, which is registered on the London market.
Alumina (Al2O3) is a high hardness compound with a melting point of 2054 ° C and a boiling point of 2980 ° C. It is an ion crystal that can be ionized at high temperatures and is commonly used in the manufacture of refractory materials. Industrial Al2O3 is prepared from bauxite (Al2O3▪3H2O) and diaspore. For high purity Al2O3, it is generally prepared by chemical methods.
Al2O3 has many isomorphous crystals. There are currently more than 10 kinds of crystals, mainly three crystal forms, namely γ-Al2O3, β-Al2O3, and α-Al2O3 (corundum). Among them, the structure has different properties, and is almost completely converted into α-Al2O3 at a high temperature of 1300 ° C or higher.
The above is about the difference and introduction of aluminum, primary aluminum, electrolytic aluminum, aluminum ingot and aluminum oxide. If you are looking for aluminum processing factory, please choose us.
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