Where Does Aluminum Come From

Aluminum from

The most abundant metal element in the Earth's crust is 8.3%. It mainly exists as aluminosilicate ore, but also bauxite and cryolite. Alumina is a white amorphous powder which has many variants. The best known are α-Al₂O₃ and β-Al₂O₃. Corundum in nature belongs to α-Al ₂O₃. It is second only to diamond in hardness and has a high melting point and acid and alkali resistance. It is often used to make bearings, abrasiveness and refractories. Such as corundum crucible, can withstand the high temperature of 1800℃. Al₂O₃ has a variety of colors due to different impurities. For example, those containing a small amount of Cr (III) are red and are called rubies. Those containing Fe (II), Fe (III) or Ti (IV) are called sapphires.

Aluminum is a light metal with the chemical symbol Al and atomic number 13. The CONTENT OF ALUMINUM ELEMENT IN THE EARTH'S CRUST IS second only to oxygen and SILICON, and ranks the third. It is the most abundant metal element in the Earth's crust, and its reserves rank the second among metals. In metal varieties, second only to steel, for the second major category of metals.

Silvery white light metal. It's malleable. Commodities are often made in rod, sheet, foil, powder, ribbon and filamentous form. In moist air can form an oxide film to prevent metal corrosion. Aluminum powder and aluminum foil heat up in the air and burn furiously, creating a blinding white flame. Soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, insoluble in water. Relative density 2.70. Melting point is 660 ℃. The boiling point of 2327 ℃. Aluminum is the most abundant metal element in the Earth's crust, second only to oxygen and silicon. The development of three important industries, aviation, construction and automobile, require material characteristics unique to aluminum and its alloys, which greatly facilitates the production and application of this new metal aluminum. It is widely used.

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