ABOUT ALUMINIUM

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The Resources of the Aluminum

Many people often think that iron is the most abundant metal in the earth's crust.In fact, aluminum is the most abundant metal in the earth's crust, followed by iron.Aluminum accounts for 7.45% of the total weight of the earth's crust, almost twice as much as iron!The earth is full of aluminum compounds, like ordinary soil, which contains a lot of aluminum oxide, Al2O3.The most important ore is bauxite.The occurrence of bauxite in the world can be roughly divided into three categories: Cenozoic laterite deposits on silicic rocks, which account for about 80% of the global total reserves;Paleozoic karstic deposits occurring above carbonate rocks account for about 12% of the global total reserves;Paleozoic (or Mesozoic) Chihewen deposits, which occur above the terrane, account for about 2% of the world's total reserves.

Aluminum properties

Aluminum is a silvery and malleable member of the chemical element boron group.

 Aluminum has become the most widely used non-ferrous metal due to its corrosion resistance due to passivation, low density, low tension and its tendency to form alloys with various chemical elements such as copper, zinc, manganese, silicon and magnesium, which have greatly improved mechanical properties.Aluminum is a young metal that does not exist in nature as a elemental state, but in the form of compound aluminum oxide (Al2O3). Al2O3 has a high melting point and is not easy to be reduced, which makes aluminum discovered late.In 1825, The Danish scientist Ostete reduced anhydrous aluminum chloride with potassium amalgam, a few milligrams of metal aluminum.

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In 1954, French scientist De Vere succeeded in using sodium reduction method to get metal aluminum, but the metal aluminum produced by chemical method is more expensive than gold, and only used for the production of helmets, tableware, toys and other valuables used by Napoleon's royal family.With the invention of the Hall-Heru smelting process and the Bayer process for producing alumina, aluminum began to be widely used in the late 19th century.To this day, these two methods are still the main (indeed almost the only) methods for producing aluminum and alumina.

Aluminum Production Process

Aluminum is content is very rich in natural element, the main industry for bauxite ore, bauxite by bayer process such as refining processes of alumina, alumina by electrolytic aluminium smelting as (also known as aluminium), so the aluminum industry in the upstream industry chain can be divided into mining bauxite, alumina refining - three links such as aluminium smelting, in general,Four tons of bauxite can produce two tons of alumina, which in turn can produce one ton of primary aluminum.


Post time: Oct-15-2021