1. Electrolytic aluminum, aluminum ingots, aluminum oxide difference electrolytic aluminum is a method of smelting aluminum, usually in the electrolyzer through high current to aluminum oxide decomposition. According to the composition of high purity aluminum ingots, aluminum alloy ingots and remelting of three kinds of aluminum ingots, according to the shape and size for round ingots, ingots, bar ingots, t-shaped ingots and other kinds of alumina, also known as aluminium oxide, was white powder. The primary aluminum is a liquid aluminum liquid produced in the process of electrolysis, which has not been treated by precipitation and so on. The primary aluminum can be made into aluminum ingot by cooling in the casting aluminum ingot model. Therefore, alumina is the raw material of Yi out aluminum liquid, electrolytic aluminum is the process, the primary aluminum is electrolytic process of aluminum liquid, aluminum ingot is a kind of aluminum products, the final circulation of salable products in the market. Electrolytic aluminum is aluminum produced by electrolysis. Cryolite-alumina Molten Salt electrolysis method is adopted in modern electrolytic aluminum industry. Molten cryolite is the solvent, alumina is the solute, carbonaceous body is the anode, aluminum liquid is the cathode, after the strong direct current, at 950 °c-970 °c, the electrochemical reaction is carried out on the two electrodes in the electrolyzer.

Industrial Aluminum Ingots, in our daily industry, the raw material is called aluminum ingots, according to the National Standard (Gb/t 1196-2008) should be called “Remelting aluminum ingots”, but we are accustomed to call “Aluminum ingots”. It is produced by electrolysis of alumina-cryolite. There are two main types of aluminum ingot after entering into industrial application: Cast Aluminum Alloy and wrought aluminum alloy. CAST aluminium and aluminium alloys are castings in which aluminium is produced by casting; wrought aluminium and aluminium alloys are products of aluminium produced by pressure processing: Sheet, strip, foil, tube, bar, mould, wire and forgings. According to the national standard, “Aluminium ingots for remelting are divided into eight grades according to chemical composition, namely AL99.90, AL99.85, AL99.70, AL99.60, AL99.50, AL99.00, Al99.7E and Al99.6E”(Note: The number after Al is the aluminium content) . Some people call “A00”aluminum, aluminum is actually 99.7% purity of aluminum, in the London market called “Standard aluminum. As we all know, our technical standards in the 1950s all came from the former Soviet Union, “A00”is the Russian brand in the Gost, “A”is the Russian Alphabet, not the English “A”, nor is it the Pinyin letter “A”, which is more accurately referred to as “Standard aluminum”in international usage. Standard Aluminium is aluminium ingots containing 99.7% aluminium, which is registered on the London market. Alo is a high hardness compound with a melting point of 2054 °C and a boiling point of 2980 °C. it is an ionizable ionic crystal at high temperature and is often used in the manufacture of Refractory. Industrial Al2O3 is prepared from Bauxite (Al2O3? 3H2O) and diaspore. For Al2O3 which requires high purity, it is usually prepared by chemical method. Al2O3 has many isomeric crystals, there are more than 10 kinds, mainly three crystal forms, namely γ-Al2O3, β-Al2O3 and α-Al2O3(corundum) . The α-al2o3 was almost completely converted to α-al2o3 at high temperature above 1300 °C

2. Surface damage of aluminum profile and its solution 

01. The main reason of surface damage of aluminum profile 1 there is impurity or composition segregation on the surface of Ingot. When there is a large amount of segregation on the surface of the INGOT and the INGOT has not been homogenized or the effect of homogenization treatment is not good, there are a certain number of hard metal particles in the ingot, these segregation or hard metal particles adhere to the surface of the working belt or cause damage to the working belt, resulting in scratches on the surface of the profile. 2 There are sundries on the mold cavity or working belt, and the hardness of the working belt of the mold is low, the surface of the working belt is injured during extrusion and the profile is scratched; 3 there is a hard inclusion in the exposed metal or graphite strip on the discharging track or the swing bed, and when it comes into contact with the profile, the profile surface is scratched; 4 when the fork bar is used to transfer the profiles from the discharge rail to the swing bed, the profiles are bruised due to the excessive speed, 5 the profiles are scratched due to the manual dragging on the swing bed, and 6 the profiles are rubbed or squeezed against each other during the transportation. Solution 1 to strengthen the quality control of Ingot; 2 to improve the quality of die repair, regular nitriding and strict execution of nitriding process; 3 to isolate the profile with the auxiliary tools with soft felt, minimize the contact damage between the profile and the auxiliary; 4 production should be handled gently, try to avoid dragging or turning profiles; 5 reasonable layout of profiles in the material box, try to avoid mutual friction 

source: network finishing