[China Aluminum Network] 1. What are the two major types of metal elements? Which of the following is aluminum?
A: Usually the metal elements are divided into two major categories, black and colored. Except that iron, manganese, and chromium are ferrous metals, the others are all non-ferrous metals, and aluminum belongs to non-ferrous metals and the like.
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 multifunctional metal. The specific gravity of aluminum is 2.7/cm3 and the melting point is 660°C. Aluminum has good electrical conductivity, thermal conductivity, and corrosion resistance. It also has good ductility and plasticity, while aluminum alloys have high mechanical strength.
Uses: Due to the light weight of aluminum and the high strength of aluminum and its alloys, aluminum can be used as light structural materials and construction industrial materials, such as aircraft, ships, and profiles, as well as electrical, thermal and corrosion-resistant materials, and food packaging. Materials and so on.
4. What are the two stages in the history of aluminum smelting?
A: The chemical method of aluminum and electrolytic aluminum are two stages.
5. What is electrolysis of aluminum?
A: Electrolytic aluminum is a cryolite-alumina molten salt electrolysis method. It uses cryolite as a solvent, alumina as a smelting substance, and a strong direct current flowing into the electrolytic cell to perform an electrochemical reaction on the cathode and the anode. Electrolysis products, the cathode is aluminum liquid, the anode is CO2 and CO gas (carbon as the anode), this method is electrolytic aluminum.
6. What is the raw material for aluminum electrolysis?
A: The raw materials for aluminum electrolysis are roughly divided into three categories: raw materials—aluminum oxide; flux—fluorinated salts (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 purpose of aluminum electrolysis into direct current?
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