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Www.assignmentpoint.com Lecture on Minerals.

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1 Lecture on Minerals

2 Minerals are naturally-occurring inorganic substances with a definite and predictable chemical composition and physical properties

3 Classification of Minerals
Metallic Ferrous Non-ferrous Precious Non-metallic Energy Minerals

4 CLASSIFICATION OF MINERALS
ENERGY METALLIC NON - METALLIC NON - FERROUS FERROUS PRECIOUS

5 Ferrous – Iron Ore, Manganese, Nickel, Cobalt
Non-ferrous – Copper, Lead, Tin, Bauxite Precious – Gold, Silver, Platinum Non-metallic – Mica, Salt, Potash, Sulphur Energy Minerals – Coal, Petroleum, Natural Gas

6 Ore A mineral or an aggregate of minerals from which a valuable constituent, especially a metal, can be profitably mined or extracted

7 All Minerals are Ore but All Ore are not Minerals

8 OCCURANCE OF MINERALS Minerals generally occur in the form:
Minerals generally occur in the form: Igneous and Metamorphic rocks Sedimentary rocks Decomposition of surface rocks

9 IRON Iron Ore is the basic mineral and is the backbone of Industrial development. Magnetite is the finest iron ore with a very high content of iron. Hematite ore is the most important industrial iron ore.

10 Metallurgy of Iron Iron is found in great abundance in nature. It is highly reactive and is hardly available in free state. Iron exists in the combined form in nature in various minerals among which oxide and sulphide ores of iron are vastly used.

11 Most common Ores of Iron
Hematite Fe2O3 Limonite Fe2O3.3H2O Magnetite Fe3O4 Siderite FeCO3 Iron pyrite FeS2 Copper pyrite CuFeS2

12 METALLURGY Dressing of ore pulverization Concentration of ore
Dressing of ore pulverization Concentration of ore removal of moisture, volatile impurities converting sulphur, phosphorus into their oxides converting ferrous to ferric oxide Reduction of ore smelting

13 BLAST FURNACE

14

15

16 Manganese Manganese is mainly used in the manufacturing of steel and ferro-manganese alloy, bleaching powder, insecticides and paints. Orissa is the largest producer of manganese ores in India accounting for one-third of the total production.

17 Pyrolusite MnO2 Hausmannite Mn2+Mn3+2O4 Rhodochrosite MnCO3
ORES OF MANGANEESE Pyrolusite MnO2 Hausmannite Mn2+Mn3+2O4 Rhodochrosite MnCO3

18 Metallurgy of manganese
Dressing of ore pulverization Extraction Thermite Reaction

19 Thermite reaction

20

21 Thank You

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