by Rajan Gupta | Aug 28, 2020 | Metals
Aluminium is the most abundant metal in the earth’s crust. It is a reactive metal so it occurs in combined state as its oxides and fluorides. The important ores of aluminium are: 1. Bauxite Al2O3.2H2O (aluminium oxide dihydrate) 2. Cryolite Na3AlF6 (sodium aluminium...
by Rajan Gupta | Aug 28, 2020 | Metals
There are two common methods which are used to get metals of very high purity. These are: 1. Zone Refining By this method, those metals are purified which require high purity such as germanium, silicon and gallium. In this method, impure metal is taken in the form of...
by Rajan Gupta | Aug 28, 2020 | Metals
The metal obtained by the methods in previous article is usually impure. So, it is to be purified. The method used for refining of metal depends on the nature of metal and impurities present in it. Some common methods which are used for purification of impure metals...
by Rajan Gupta | Aug 28, 2020 | Metals
The process of converting metal oxides into metals is called reduction. For reduction, different types of reducing agents are used depending on the reactivity of ores. The commonly used methods for reduction are : 1. Reduction by Heat (pyrometallurgy) The oxides of...
by Rajan Gupta | Aug 28, 2020 | Metals
After the concentration of ores, the sulphide or carbonate ores of some metals are converted into metal oxides because it is easier to obtain metals from their metal oxides as compared to metal sulphides or metal carbonates. The sulphide ores of metals can be...
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