Introduction and difference of aluminium, primary aluminium, electrolytic aluminium, aluminium ingot and alumina
Electrolytic aluminum is a method of smelting metal aluminum, usually in the electrolytic cell through the high current to alumina decomposition of metal aluminum.
Aluminum ingot is divided into three kinds of high purity aluminum ingot, aluminum alloy ingot and remelting aluminum ingot according to different components, and can be divided into round ingot, plate ingot, strip ingot, T shaped ingot and so on according to shape and size.
Aluminum is a silver white metal, which is second only to oxygen and silicon in the earth's crust, and comes in the third place. The density of aluminium is small, so it is called light metal. Aluminum is a non-ferrous metal with high output and utilization, and is second only to steel in the world. The density of aluminum is about 1/3 of the density of steel and copper. Because of its light material, aluminum is often used in manufacturing, trains, subways, cars, airplanes, ships, rockets and other land, sea and air transportation tools to reduce deadweight and increase loading capacity. Similarly, aluminum also plays an important role in military products.
Alumina is also called three oxidation two aluminum, which is white powder. The original aluminum is aluminum liquid like a Yi in the electrolysis process, without precipitation treatment. The original aluminum can be made into aluminum ingot by cooling into the cast aluminum ingot model. Therefore, alumina is the interpretation of liquid aluminum materials, aluminum electrolysis process, primary aluminum is in the process of electrolysis aluminum liquid, aluminum ingot is an aluminum products, and finally in the market circulation of products sold.
Electrolytic aluminium is the aluminum obtained by electrolysis. Modern aluminum industry production by cryolite alumina by molten salt electrolysis. Molten cryolite is solvent, alumina as solute to carbon as anode, aluminum as cathode, pass into DC strong, at 950 DEG -970 DEG, in the electrolytic cell poles on the electrochemical reaction, both electrolysis.
Industrial aluminium ingot
In our daily industry, the raw material is called aluminum ingot, according to the national standard (GB/T 1196-2008) should be called "remelting aluminum ingot", but we call it "aluminum ingot"". It is with the alumina cryolite produced by electrolysis. There are two major categories of aluminum ingot after industrial application: cast aluminum alloy and wrought aluminum alloy. Cast aluminum and aluminum alloy are used to produce aluminum castings by casting method; wrought aluminum and aluminum alloy are produced by pressure processing aluminum, strip, foil, tube, rod, mold, wire and forgings. According to the national standard, the remelting aluminum ingot is divided into 8 brands according to the 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 aluminum content). Somebody called "A00" aluminum is actually aluminum containing 99.7% purity, called "standard aluminum" in the London market". We all know that in 50s our technical standards are from the former Soviet Union, "A00" is the national standard in the Soviet Russian brand, "A" is the Russian alphabet, rather than English "A" word, nor the Chinese phonetic alphabet "A" and the international community, "said standard aluminum is more precise. Standard aluminum is the aluminum ingot containing 99.7% aluminum, which is registered in the London market.
Alumina (Al O) is a kind of high hardness compounds, the melting point is 2054 DEG C, the boiling point of 2980 DEG C, is ionic crystal at high temperature can be ionized, commonly used in the manufacture of refractory materials. Industrial Al2O3 is composed of bauxite (Al2O3 after 3H2O) and diaspore preparation, for the requirement of high purity Al2O3, general chemical preparation method.
Al2O3 has many homogeneous crystals, which are known to have more than 10 kinds, and there are mainly 3 crystal types, namely, gamma -Al2O3, beta -Al2O3, and alpha -Al2O3 (Gang Yu). The structure is different in nature, and almost completely transformed into alpha -Al2O3 at high temperature above 1300.