September 2009
Beginner
348 pages
10h 19m
English
Content preview from Basic Civil Engineering
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Chapter 9
Aluminium
Aluminium occurs in abundance on the surface of the earth. It is available in various forms such as oxides, sulphates, silicates, phosphates, etc. But it is commercially produced mainly from bauxite (Al2O3, 2H2O) which is hydrated oxide of aluminium.
Bauxite deposits occur almost all over India, and particularly those at Balaghat, Kutni, Chhota Nagpur, Bhopal and Rewa are well known. The laterite deposits on the south-eastern and south-western coasts are also rich in bauxite content. Indian bauxite deposits compare favourably with those in any other parts of the world in the percentage of aluminium content.
9.1 MANUFACTURE
Aluminium is extracted from bauxite in two stages:
- Purification of the ore to produce alumina (Al ...
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