Metals and Ores-Valuable details for KPSC Examinations
Metals and Ores
The followings are very important details in Kerala Public Service Examination point of view.Study tem with utmost care those who are preparing for forthcoming LDC &LGS Examination conducted by Kerala Public Service Commission
- Ore is a naturally occurring solid material from which a metal or valuable mineral can be extracted profitably.
- Metallurgy is the process of extracting metal in a pure state on a large scale from its ore by physical and chemical means.
- Gerog Agricola is author of De re Metallica, and important early book on metal extraction.
- Gangue is the impurity present in the ore.
- Calcination is the process of heating the ore below its melting point in the absence of air to remove volatile impurities like Arsenic.
- Roasting is the process in which the ore is heated below its melting point in the presence of air to oxidize the impurities. Eg: carbon, sulphur etc removed as their gaseous oxides.
Metal | Ore | |
Aluminum | .. | Bauxite |
Antimony | .. | Stibnite |
Barium | .. | Barite |
Calcium | .. | Gypsum, Limestone, dolomite, Fluorspar |
Chromium | .. | Chromite |
Copper | .. | Copper pyrites, copper glance, Malchite |
Gold | .. | Calverite |
Iron | .. | Heamatite, Magnetite, Iron Pyrites |
Lead | .. | Galena, Litharge, Cerussite |
Lithium | .. | Petalite, Lepidolite |
Magnesium | .. | Magnesite |
Manganese | .. | Pyrolusite |
Mercury | .. | Cinnabar |
Nickel | .. | Garnierite, Pentlandite |
Potassium | .. | Carnallite, Sylvine kainite |
Silver | .. | Argentite, Pyrargyrite, Stephanite, Born silver, Cinnabar |
Sodium | .. | Rock Salt |
Thorium | .. | Monozite |
Tin | .. | Cassiterite |
Titanium | .. | Rutile |
Uranium | .. | Pitch blend, Carnotite |
Zinc | .. | Zinc blend, Calamine, Zincite, Sphalerite, |