Page 3 - 3. Lesson Notes - Ch-3 Mettalurgy-1
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differences between the physical or chemical properties of gangue and the ore.
This process is known as CONCENTRATION of the ORE.
Methods of concentration basing on the properties of Ore & Impurities:
Examples-
Heavy metal ores Ores having Sulphide Ores Difference in
difference in magnetic
chemical properties b/w
properties b/w ore & impurity.
ore & impurity.
Haematite-Fe2O3 Bauxite- Cinnabar-HgS Magnetite-Fe3O4
Al2O3.2H2O
Fig. Heavy metal ores like Haematite is concentrated by
Gravity separation/Hydraulic washing.
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