[China Aluminum Industry Network] 1. What are the two major categories of metal elements, and what kind of aluminum does it belong to? A: Usually the metal elements are divided into two major categories, black and colored. Except that iron, manganese, and chromium are ferrous metals, others are non-ferrous metals, and aluminum is classified as non-ferrous metals. 2. What kinds of non-ferrous metals can be classified according to their characteristics? A: Non-ferrous metals can be classified into heavy metals, light metals, precious metals, rare metals, and semi-metals according to certain characteristics. Aluminum is a kind of metal of colored light metals. 3. What are the properties and uses of aluminum? A: Nature: Aluminum is a light metal with a silver-white metallic luster and is known in the industry as a versatile metal. The specific gravity of aluminum is 2.7/cm3 and the melting point is 660°C. Aluminum has outstanding electrical conductivity, thermal conductivity, and corrosion resistance. Together, it has excellent ductility and plasticity, while aluminum alloys have high mechanical strength. Uses: Due to the light weight of aluminium and the high strength of aluminum and its alloys, aluminium can be used as light construction materials and construction industry data such as aircraft, ships, profiles, etc. It can also manufacture electrical data, heat data and corrosion resistance information, food packaging. Information and so on. 4. What are the two periods in which the history of aluminum smelting can be divided? A: The chemical method of aluminum smelting and electrolytic smelting are two periods. 5, what is electrolytic aluminum smelting? A: Electrolytic aluminum smelting is a cryolite-alumina smelting salt electrolysis method. It uses cryolite as a solvent, alumina as a smelting substance, and a strong direct current into the electrolytic cell, and electrochemical reactions occur at the cathode and the anode. . Electrolysis of goods, the cathode is aluminum liquid, the anode is CO2 and CO gas (carbon as the anode), this method is electrolytic aluminum. 6, the original information for aluminum electrolysis is what? A: The raw materials used in aluminum electrolysis are roughly divided into three categories: material—aluminum oxide; flux—fluorinated salt (including cryolite, aluminum fluoride, sodium fluoride, magnesium fluoride, calcium fluoride, lithium fluoride, etc. ); anode material - pre-baked carbon block (pre-baked tank). 7. What is the intention of aluminum electrolysis in direct current? Answer: The introduction of direct current into the electrolytic cell is based on the use of its thermal energy to melt the cryolite into a molten state and to maintain a certain electrolysis temperature. On the other hand, the main goal is to complete electrochemical reactions in the north and south poles. Aluminum ions in the electrolyte get electrons from the cathode to precipitate, and then aluminum is obtained, and oxygen ions are discharged on the anode to form a mixed gas of CO2 and CO with carbon. 8. Does the impurities in the aluminum oxide guess have any damage to the product? A: Aluminium solutions produce relatively high demand for the purity of alumina, usually industrial alumina, with a purity of more than 98%, and are usually rich in a few silica, ferric oxide, sodium oxide, calcium oxide, and moisture. These impurities have a helium effect on aluminum electrolysis. The oxide impurities such as silicon oxide, iron oxide, and titanium dioxide, whose potentials are higher than aluminum, are reconstituted by aluminum during the electrolysis process. Recovered Si and Fe enter into the aluminum, and then the grade of aluminum decreases, and those potentials decrease. Oxide impurities of elements that are negative to aluminum, such as Na20 and CaO, can differentiate cryolite, causing the onset of changes in the electrolyte composition and the addition of fluoride salts. Moisture will differentiate cryolite and will also add hydrogen content in the liquid. Excessive moisture can also lead to electrolyte blasting and damage to workers' safety. P205 and SO2 will reduce current efficiency. Therefore, the aluminum industry puts a strict demand on the purity of alumina. 9. What is the demand for the physical properties of the A1203 in industrial aluminum electrolysis? A: The physical properties of industrial alumina are highly related to ensuring the normal progress of the electrolysis process and improving the efficiency of gas purification. It is generally required that it has a small water absorption, can be dissolved more quickly in molten cryolite, less flying and losing during processing, and can better close the carbon anode to avoid oxidation in the air, good insulation performance, together With regard to gas purification, it is also required to have excellent activity and a satisfactory specific surface area, and then it is possible to efficiently absorb HF gas. These physical properties depend on the crystal shape, particle size and shape of the alumina crystals. 10, according to Al2O3, the physical properties of the shape of the alumina can be divided into three categories? Which type of production between the better A: According to the physical properties of alumina, alumina can be divided into three types: sand type, center type and powder type. During this period, sand-type alumina produced better. 11, the role of cryolite flux is what? A: The cryolite is used as the flux of electrolytic aluminum; its role is that it can dissolve aluminum oxide well before it is dissolved, and the formed melt can be electrolyzed below the melting point of pure cryolite and has good fluidity; At the electrolysis temperature, the density of the cryolite-alumina melt is 10% less than that of the aluminum liquid, so the electrolytically produced aluminum liquid can be deposited on the cathode below the electrolytic solution, which can reduce the oxidation loss of aluminum and greatly simplify the The structure of the aluminum electrolytic cell; Third, the cryolite has outstanding conductivity; Fourth, the cryolite is not rich in metallic impurities whose electrical potential sequence is more positive than aluminum, and can ensure the quality of commercial aluminum. Currently, cryolite is still Aluminum flux is more promising than a flux. 12, aluminum electrolysis for the use of carbon anode? Answer: In the process of aluminum electrolysis, the highly erosive cryolite melt directly touches the electrode. As the conductivity of the north and south of the yin and Yang of various kinds of guesses, not only can be excellent conductive, but also high temperature, corrosion resistance, together with a quote and low price of only carbon materials. Therefore, the aluminum industry produces carbon materials for the North and South poles. End Mills For Stainless Steels End Mills For Stainless Steels,Carbide Stainless Steel Milling Cutter,Solid Carbide End Mill Cutter,End Mill Cutter For Stainless Steel Supal(changzhou)Precision Tools Co.,Ltd , https://www.endmillpro.com