General Principles and Process of Isolation of Metals
Introduction, Concentration of Ores
- Metals are substances characterized by a shine called metallic luster having high electrical and heat conductivity and are malleable and ductile.
- An ore is a rock or mineral from which a metal or non-metal can be economically produced. Eg. Iron is obtained from haematite (Fe2O3).
- Metal can be extracted from its ore by a) Concentration of ore b) Extraction of Metal c) Purification of Metal
- Concentration is done by
- a) Gravity separation – i.e washing of ore. Eg: Carbonates and oxides
- b) Froth flotation process – used for sulphide ores
- c) Magnetic separation – for magnetic ores, Tin stone (Cassiterite SnO2) non-metallic ore is separated from magnetic wolframite FeWO4.
- d) Electrostatic separation – Eg. To separate zinc sulphide and lead sulphide.
- e) Chemical method – Eg. Baeyer’s process used for bauxite (Fe2O3 + Al2O3 Red Bauxite)
Part1: View the Topic in this Video from 1:42 to 18:12
Part2: View the Topic in this Video from 0:08 to 7:50
Part3: View the Topic in this Video from 0:08 to 12:55
Part4: View the Topic in this Video from 0:08 to 9:23
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