The main differences between aluminum, alumina, aluminum ingots, electrolytic aluminum, and primary aluminum
Aluminum is a silver-white metal, which is ranked third in the earth's crust after oxygen and silicon. Aluminum has a small density and is called a light metal. Aluminium is a non-ferrous metal with high output and usage, 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, it is often used in manufacturing, trains, subways, cars, airplanes, ships, rockets and other land, sea and air vehicles to reduce their own weight and increase loading capacity. Similarly, aluminum has a prominent position in military products.
Alumina, also called alumina, is a white powder. Electrolytic aluminum is a method of smelting metallic aluminum. Usually, aluminum oxide is decomposed into metallic aluminum by a large current in an electrolytic cell.
Primary aluminum is a liquid aluminum liquid that is produced during the electrolysis process, and has not been treated with precipitation or the like. Primary aluminum can be converted into aluminum ingots by cooling into the cast aluminum ingot model. Therefore, alumina is the raw material for the production of aluminum liquid, electrolytic aluminum is the process, primary aluminum is the aluminum liquid in the electrolytic process, aluminum ingot is an aluminum product, and it is a saleable product that eventually circulates on the market.
Our daily industrial raw material is called aluminum ingot. According to the national standard (GB / T 1196-2008), it should be called "aluminium ingot for remelting". However, everyone has been used to "aluminum ingot". It is used for oxidation. Aluminum-Cryolite is produced by electrolytic method. The production of aluminum ingot china is composed of bauxite mining, alumina production, and aluminum electrolysis.
Bauxite is first mined, aluminum ore powder is produced through processes such as water washing and grinding, and then alumina is obtained through four complex processes such as roasting. There are three main types of bauxite that produce alumina: gibbsite, Hydraulic bauxite, boehmite.
Due to the different characteristics of the three types of bauxite, each alumina production enterprise has adopted different production processes in production, mainly including Bayer method, soda lime sintering method and Bayer-sintering combined method. Generally, high-grade bauxite is produced by Bayer method, and low-grade bauxite is produced by combined method or sintering method. Because of its simple process and low energy consumption, the Bayer process has become the main method used in the current alumina production, and its output accounts for about 95% of the global alumina production.
There are two major categories of aluminum ingots after they have entered industrial applications: cast aluminum alloys and deformed aluminum alloys. Casting aluminum and aluminum alloys are aluminum castings produced by casting methods; deformed aluminum and aluminum alloys are aluminum processed products produced by pressure processing methods: plates, strips, foils, tubes, rods, shapes, wires and forgings.
Aluminium ingots are classified into high-purity aluminum ingots, aluminum alloy ingots, and aluminum ingots for remelting according to different compositions; according to shape and size, they can be divided into round ingots, plate ingots, bar ingots, and T-shaped ingots. At present, the aluminum ingot casting process generally uses a casting process, that is, the aluminum liquid is directly poured into a mold, and it is taken out after cooling. The quality of the product is mainly in this step, and the entire casting process is also based on this process. The casting process is a physical process in which liquid aluminum is cooled and crystallized into a solid aluminum ingot.