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Explain the terms  Calcination and Roasting with example.

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Explain the terms 

Calcination and Roasting with example.

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Calcination Roasting
  • Calcination is the process of heating the ore in the absence or limited supply of air.
  • The volatile matter escapes leaving behind the metal oxide.
  • Oxygen is not consumed.
  • It is applied to hydrated oxides, hydroxides and carbonates.
  • Roasting is the process of heating the ore in a regular supply of air in a furnace at a temperature below the metal.
  • Oxygen is consumed.
  • It is applied to sulphide ores.
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